/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 11:36:58,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 11:36:58,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 11:36:58,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 11:36:58,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 11:36:58,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 11:36:58,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 11:36:58,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 11:36:58,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 11:36:58,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 11:36:58,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 11:36:58,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 11:36:58,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 11:36:58,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 11:36:58,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 11:36:58,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 11:36:58,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 11:36:58,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 11:36:58,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 11:36:58,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 11:36:58,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 11:36:58,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 11:36:58,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 11:36:58,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 11:36:58,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 11:36:58,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 11:36:58,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 11:36:58,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 11:36:58,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 11:36:58,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 11:36:58,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 11:36:58,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 11:36:58,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 11:36:58,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 11:36:58,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 11:36:58,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 11:36:58,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 11:36:58,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 11:36:58,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 11:36:58,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 11:36:58,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 11:36:58,720 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-16 11:36:58,766 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 11:36:58,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 11:36:58,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 11:36:58,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 11:36:58,769 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 11:36:58,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 11:36:58,769 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 11:36:58,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 11:36:58,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 11:36:58,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 11:36:58,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 11:36:58,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 11:36:58,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 11:36:58,772 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 11:36:58,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 11:36:58,772 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 11:36:58,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 11:36:58,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 11:36:58,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 11:36:58,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 11:36:58,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 11:36:58,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:36:58,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 11:36:58,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 11:36:58,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 11:36:58,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 11:36:58,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 11:36:58,774 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 11:36:58,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 11:36:59,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 11:36:59,100 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 11:36:59,103 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 11:36:59,105 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 11:36:59,105 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 11:36:59,106 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2020-10-16 11:36:59,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/102683699/57f734c08b944f8db3102626c86668d9/FLAG33ea037c2 [2020-10-16 11:36:59,770 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 11:36:59,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench-1.i [2020-10-16 11:36:59,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/102683699/57f734c08b944f8db3102626c86668d9/FLAG33ea037c2 [2020-10-16 11:37:00,016 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/102683699/57f734c08b944f8db3102626c86668d9 [2020-10-16 11:37:00,026 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 11:37:00,028 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 11:37:00,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 11:37:00,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 11:37:00,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 11:37:00,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c15c335 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00, skipping insertion in model container [2020-10-16 11:37:00,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 11:37:00,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 11:37:00,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:37:00,579 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 11:37:00,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:37:00,706 INFO L208 MainTranslator]: Completed translation [2020-10-16 11:37:00,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00 WrapperNode [2020-10-16 11:37:00,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 11:37:00,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 11:37:00,709 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 11:37:00,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 11:37:00,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 11:37:00,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 11:37:00,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 11:37:00,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 11:37:00,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 11:37:00,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 11:37:00,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 11:37:00,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 11:37:00,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:37:00,854 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 11:37:00,854 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 11:37:00,854 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 11:37:00,854 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 11:37:00,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 11:37:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 11:37:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 11:37:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 11:37:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 11:37:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 11:37:00,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 11:37:00,857 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 11:37:01,146 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 11:37:01,147 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 11:37:01,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:37:01 BoogieIcfgContainer [2020-10-16 11:37:01,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 11:37:01,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 11:37:01,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 11:37:01,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 11:37:01,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 11:37:00" (1/3) ... [2020-10-16 11:37:01,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d745807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:37:01, skipping insertion in model container [2020-10-16 11:37:01,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (2/3) ... [2020-10-16 11:37:01,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d745807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:37:01, skipping insertion in model container [2020-10-16 11:37:01,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:37:01" (3/3) ... [2020-10-16 11:37:01,164 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2020-10-16 11:37:01,179 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 11:37:01,180 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 11:37:01,189 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 11:37:01,191 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 11:37:01,224 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,225 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,225 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,226 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,226 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,226 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,227 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,227 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,228 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,228 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,228 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,229 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,229 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,229 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,230 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,230 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,230 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,231 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,231 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,231 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,232 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,232 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,233 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,233 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,233 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,234 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,234 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,234 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,235 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,235 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,239 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,239 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,239 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,240 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,240 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,240 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,251 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,251 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,251 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,252 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,252 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,253 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,273 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 11:37:01,287 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 11:37:01,311 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:37:01,311 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:37:01,312 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:37:01,312 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:37:01,312 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:37:01,312 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:37:01,312 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:37:01,312 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:37:01,326 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:37:01,327 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-16 11:37:01,329 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-16 11:37:01,331 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-16 11:37:01,372 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-16 11:37:01,373 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 11:37:01,378 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-16 11:37:01,381 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-16 11:37:02,489 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-16 11:37:02,561 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-16 11:37:02,562 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-16 11:37:02,569 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-16 11:37:02,580 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 11:37:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 11:37:02,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 11:37:02,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:02,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 11:37:02,591 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:02,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:02,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-16 11:37:02,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:02,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313980225] [2020-10-16 11:37:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:02,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313980225] [2020-10-16 11:37:02,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:02,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:37:02,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515432082] [2020-10-16 11:37:02,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:37:02,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:02,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:37:02,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:37:02,865 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 11:37:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:02,956 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-16 11:37:02,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:37:02,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 11:37:02,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:02,971 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:37:02,972 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:37:02,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:02,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:37:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-16 11:37:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:37:03,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-16 11:37:03,014 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-16 11:37:03,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,014 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-16 11:37:03,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:37:03,014 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-16 11:37:03,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:37:03,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 11:37:03,016 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,017 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-16 11:37:03,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363927414] [2020-10-16 11:37:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363927414] [2020-10-16 11:37:03,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:03,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:03,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203087005] [2020-10-16 11:37:03,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:37:03,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:37:03,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,132 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-16 11:37:03,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,186 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-16 11:37:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:03,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:37:03,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,188 INFO L225 Difference]: With dead ends: 80 [2020-10-16 11:37:03,189 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 11:37:03,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:37:03,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 11:37:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-16 11:37:03,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 11:37:03,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-16 11:37:03,200 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-16 11:37:03,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,202 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-16 11:37:03,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:37:03,202 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-16 11:37:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:37:03,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 11:37:03,204 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,204 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-16 11:37:03,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336833693] [2020-10-16 11:37:03,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336833693] [2020-10-16 11:37:03,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:03,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:03,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866625418] [2020-10-16 11:37:03,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:37:03,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:37:03,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,343 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-16 11:37:03,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,369 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-16 11:37:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:37:03,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:37:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,371 INFO L225 Difference]: With dead ends: 73 [2020-10-16 11:37:03,371 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 11:37:03,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 11:37:03,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-16 11:37:03,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:37:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-16 11:37:03,382 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-16 11:37:03,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,382 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-16 11:37:03,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:37:03,383 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-16 11:37:03,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:37:03,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 11:37:03,384 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,385 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-16 11:37:03,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397165536] [2020-10-16 11:37:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397165536] [2020-10-16 11:37:03,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:03,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:03,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868831105] [2020-10-16 11:37:03,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:37:03,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:37:03,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,444 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-16 11:37:03,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,514 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-16 11:37:03,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:03,514 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:37:03,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,516 INFO L225 Difference]: With dead ends: 86 [2020-10-16 11:37:03,516 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:37:03,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:37:03,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:37:03,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-16 11:37:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:37:03,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-16 11:37:03,527 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-16 11:37:03,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,527 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-16 11:37:03,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:37:03,527 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-16 11:37:03,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:03,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,528 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 11:37:03,529 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-16 11:37:03,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109367035] [2020-10-16 11:37:03,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109367035] [2020-10-16 11:37:03,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066317669] [2020-10-16 11:37:03,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:03,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:03,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:03,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:03,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:03,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:03,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-16 11:37:03,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661045955] [2020-10-16 11:37:03,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:37:03,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:37:03,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:03,776 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-16 11:37:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,857 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-16 11:37:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:03,858 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-16 11:37:03,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,859 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:37:03,859 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:37:03,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:37:03,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-16 11:37:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:37:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-16 11:37:03,869 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-16 11:37:03,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,869 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-16 11:37:03,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:37:03,869 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-16 11:37:03,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:03,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,870 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:04,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:04,084 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:04,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-16 11:37:04,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:04,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576027648] [2020-10-16 11:37:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576027648] [2020-10-16 11:37:04,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039810035] [2020-10-16 11:37:04,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:04,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:04,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:04,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:04,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:04,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:04,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391241439] [2020-10-16 11:37:04,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:37:04,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:04,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:37:04,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:04,289 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-16 11:37:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:04,324 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-16 11:37:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:37:04,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 11:37:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:04,326 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:37:04,326 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 11:37:04,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:04,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 11:37:04,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-16 11:37:04,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:37:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-16 11:37:04,334 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-16 11:37:04,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:04,335 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-16 11:37:04,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:37:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-16 11:37:04,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:04,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:04,336 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:04,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:04,550 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:04,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:04,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-16 11:37:04,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:04,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441780756] [2020-10-16 11:37:04,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441780756] [2020-10-16 11:37:04,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806742524] [2020-10-16 11:37:04,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:04,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:04,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:04,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:04,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:04,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:04,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623812384] [2020-10-16 11:37:04,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:37:04,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:04,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:37:04,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:04,746 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-16 11:37:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:04,808 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-16 11:37:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:04,809 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 11:37:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:04,810 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:37:04,810 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 11:37:04,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 11:37:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-16 11:37:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:37:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-16 11:37:04,824 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-16 11:37:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:04,824 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-16 11:37:04,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:37:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-16 11:37:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:04,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:04,827 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:05,028 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-16 11:37:05,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492548769] [2020-10-16 11:37:05,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492548769] [2020-10-16 11:37:05,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184597333] [2020-10-16 11:37:05,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:05,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:05,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:05,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:05,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:05,210 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:05,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:05,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147069037] [2020-10-16 11:37:05,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:37:05,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:05,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:37:05,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:05,228 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-16 11:37:05,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:05,336 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-16 11:37:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:05,337 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 11:37:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:05,338 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:37:05,338 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:37:05,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:05,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:37:05,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-16 11:37:05,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:37:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-16 11:37:05,359 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-16 11:37:05,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:05,359 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-16 11:37:05,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:37:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-16 11:37:05,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:05,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:05,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:05,579 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:05,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-16 11:37:05,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800271897] [2020-10-16 11:37:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800271897] [2020-10-16 11:37:05,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:05,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:37:05,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594355032] [2020-10-16 11:37:05,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:05,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:05,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:05,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:05,638 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-16 11:37:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:05,670 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-16 11:37:05,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:37:05,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:37:05,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:05,671 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:37:05,671 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:37:05,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:37:05,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-16 11:37:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:37:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-16 11:37:05,677 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-16 11:37:05,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:05,677 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-16 11:37:05,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:05,678 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-16 11:37:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:05,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:05,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 11:37:05,679 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:05,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-16 11:37:05,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272731170] [2020-10-16 11:37:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272731170] [2020-10-16 11:37:05,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:05,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:37:05,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607964675] [2020-10-16 11:37:05,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:05,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:05,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:05,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:05,750 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-16 11:37:05,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:05,812 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-16 11:37:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:05,813 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:37:05,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:05,814 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:37:05,815 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:37:05,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:37:05,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:37:05,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-16 11:37:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 11:37:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-16 11:37:05,833 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-16 11:37:05,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:05,833 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-16 11:37:05,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:05,833 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-16 11:37:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:05,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:05,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-16 11:37:05,835 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:05,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-16 11:37:05,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441375052] [2020-10-16 11:37:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441375052] [2020-10-16 11:37:05,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:05,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:37:05,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108177788] [2020-10-16 11:37:05,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:05,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:05,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:05,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:05,926 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-16 11:37:06,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:06,013 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 11:37:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:06,013 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:37:06,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:06,015 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:37:06,015 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:37:06,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:06,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:37:06,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-16 11:37:06,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:37:06,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-16 11:37:06,025 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-16 11:37:06,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:06,026 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-16 11:37:06,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:06,028 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-16 11:37:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:06,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:06,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:06,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-16 11:37:06,034 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:06,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-16 11:37:06,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:06,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69852143] [2020-10-16 11:37:06,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69852143] [2020-10-16 11:37:06,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:06,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:37:06,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953347384] [2020-10-16 11:37:06,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:06,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:06,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:06,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:06,101 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-16 11:37:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:06,182 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 11:37:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:06,183 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:37:06,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:06,185 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:37:06,185 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:37:06,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:06,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:37:06,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-16 11:37:06,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:37:06,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-16 11:37:06,194 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-16 11:37:06,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:06,194 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-16 11:37:06,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:06,195 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-16 11:37:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:06,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:06,196 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:06,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-16 11:37:06,196 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:06,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:06,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-16 11:37:06,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:06,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293641817] [2020-10-16 11:37:06,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293641817] [2020-10-16 11:37:06,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241593417] [2020-10-16 11:37:06,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:06,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:06,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:06,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:06,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:06,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:06,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-16 11:37:06,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927438401] [2020-10-16 11:37:06,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:37:06,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:06,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:37:06,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:06,451 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-16 11:37:06,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:06,542 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-16 11:37:06,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:06,542 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-16 11:37:06,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:06,543 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:37:06,544 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:37:06,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:37:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-16 11:37:06,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:37:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-16 11:37:06,548 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-16 11:37:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:06,549 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-16 11:37:06,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:37:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-16 11:37:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:06,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:06,550 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:06,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 11:37:06,761 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:06,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:06,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-16 11:37:06,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:06,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788582499] [2020-10-16 11:37:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788582499] [2020-10-16 11:37:06,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692143938] [2020-10-16 11:37:06,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:06,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:06,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:06,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:06,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:06,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:06,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267898239] [2020-10-16 11:37:06,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:06,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:06,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:06,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:06,978 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-16 11:37:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:07,016 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-16 11:37:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:07,016 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:07,018 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:37:07,018 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:37:07,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:07,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:37:07,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-16 11:37:07,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 11:37:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-16 11:37:07,023 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-16 11:37:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:07,023 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-16 11:37:07,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:07,024 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-16 11:37:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:07,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:07,024 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:07,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:07,225 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:07,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:07,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-16 11:37:07,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:07,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188823554] [2020-10-16 11:37:07,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188823554] [2020-10-16 11:37:07,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325765383] [2020-10-16 11:37:07,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:07,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:07,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:07,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:07,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656804475] [2020-10-16 11:37:07,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:07,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:07,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:07,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:07,474 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-16 11:37:07,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:07,523 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-16 11:37:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:07,524 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:07,526 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:37:07,526 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:37:07,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:07,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:37:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-16 11:37:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:37:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-16 11:37:07,531 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-16 11:37:07,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:07,532 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-16 11:37:07,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-16 11:37:07,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:07,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:07,533 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:07,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 11:37:07,747 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:07,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:07,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-16 11:37:07,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:07,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594178561] [2020-10-16 11:37:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594178561] [2020-10-16 11:37:07,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307186980] [2020-10-16 11:37:07,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:07,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:07,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:07,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:07,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:07,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:07,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608163384] [2020-10-16 11:37:07,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:07,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:07,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:07,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:07,980 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-16 11:37:08,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:08,078 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-16 11:37:08,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:08,079 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:08,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:08,080 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:37:08,080 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 11:37:08,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:08,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 11:37:08,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-16 11:37:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 11:37:08,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-16 11:37:08,085 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-16 11:37:08,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:08,085 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-16 11:37:08,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-16 11:37:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:08,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:08,086 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:08,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 11:37:08,296 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:08,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:08,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-16 11:37:08,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:08,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416488386] [2020-10-16 11:37:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:08,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416488386] [2020-10-16 11:37:08,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318788863] [2020-10-16 11:37:08,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:08,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:08,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:08,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:08,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:08,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:08,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:08,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:08,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190595916] [2020-10-16 11:37:08,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:08,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:08,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:08,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:08,504 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-16 11:37:08,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:08,610 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-16 11:37:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:08,611 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:08,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:08,612 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:37:08,612 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:37:08,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:08,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:37:08,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-16 11:37:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 11:37:08,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-16 11:37:08,617 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-16 11:37:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:08,617 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-16 11:37:08,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-16 11:37:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:08,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:08,618 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:08,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 11:37:08,820 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:08,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:08,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-16 11:37:08,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:08,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182695884] [2020-10-16 11:37:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:08,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182695884] [2020-10-16 11:37:08,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882259215] [2020-10-16 11:37:08,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:08,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:08,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:08,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:08,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:09,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:09,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750739378] [2020-10-16 11:37:09,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:09,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:09,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:09,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:09,024 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-16 11:37:09,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:09,074 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-16 11:37:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:09,075 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:09,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:09,076 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:37:09,077 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:37:09,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:09,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:37:09,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-16 11:37:09,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-16 11:37:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-16 11:37:09,082 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-16 11:37:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:09,082 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-16 11:37:09,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-16 11:37:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:09,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:09,083 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:09,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 11:37:09,295 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:09,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:09,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-16 11:37:09,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:09,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141192394] [2020-10-16 11:37:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141192394] [2020-10-16 11:37:09,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726581171] [2020-10-16 11:37:09,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:09,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:09,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:09,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:09,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:09,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:09,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282503233] [2020-10-16 11:37:09,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:09,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:09,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:09,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:09,461 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-16 11:37:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:09,523 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-16 11:37:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:09,523 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:09,524 INFO L225 Difference]: With dead ends: 118 [2020-10-16 11:37:09,524 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:37:09,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:09,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:37:09,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-16 11:37:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-16 11:37:09,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-16 11:37:09,529 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-16 11:37:09,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:09,529 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-16 11:37:09,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:09,529 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-16 11:37:09,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:09,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:09,530 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:09,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:09,740 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:09,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-16 11:37:09,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:09,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774179061] [2020-10-16 11:37:09,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774179061] [2020-10-16 11:37:09,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540031110] [2020-10-16 11:37:09,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:09,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:09,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:09,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:09,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550337520] [2020-10-16 11:37:09,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:09,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:09,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:09,914 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-16 11:37:09,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:09,980 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-16 11:37:09,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:09,980 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:09,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:09,981 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:37:09,981 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:37:09,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:09,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:37:09,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-16 11:37:09,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 11:37:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-16 11:37:09,986 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-16 11:37:09,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:09,986 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-16 11:37:09,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:09,986 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-16 11:37:09,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:09,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:09,987 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:10,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:10,197 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:10,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-16 11:37:10,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:10,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260697604] [2020-10-16 11:37:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260697604] [2020-10-16 11:37:10,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684817652] [2020-10-16 11:37:10,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:10,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:10,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:10,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:10,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:10,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:10,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227249743] [2020-10-16 11:37:10,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:10,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:10,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:10,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:10,406 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-16 11:37:10,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:10,473 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-16 11:37:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:10,474 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:10,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:10,475 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:37:10,475 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 11:37:10,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 11:37:10,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-16 11:37:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-16 11:37:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-16 11:37:10,479 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-16 11:37:10,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:10,482 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-16 11:37:10,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:10,482 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-16 11:37:10,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:10,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:10,483 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:10,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 11:37:10,689 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:10,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:10,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-16 11:37:10,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:10,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577258670] [2020-10-16 11:37:10,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577258670] [2020-10-16 11:37:10,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893567660] [2020-10-16 11:37:10,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:10,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:10,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:10,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:10,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:10,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:10,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164580291] [2020-10-16 11:37:10,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:10,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:10,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:10,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:10,871 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:10,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:10,966 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-16 11:37:10,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:10,967 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:10,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:10,968 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:37:10,968 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:37:10,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:10,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:37:10,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-16 11:37:10,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 11:37:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-16 11:37:10,976 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-16 11:37:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:10,976 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-16 11:37:10,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-16 11:37:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:10,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:10,977 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:11,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:11,189 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:11,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:11,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-16 11:37:11,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:11,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055241675] [2020-10-16 11:37:11,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055241675] [2020-10-16 11:37:11,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147108950] [2020-10-16 11:37:11,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:11,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:11,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:11,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:11,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:11,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:11,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432852476] [2020-10-16 11:37:11,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:11,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:11,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:11,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:11,367 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-16 11:37:11,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:11,449 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-16 11:37:11,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:11,449 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:11,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:11,451 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:37:11,451 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:37:11,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:11,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:37:11,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-16 11:37:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-16 11:37:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-16 11:37:11,455 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-16 11:37:11,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:11,455 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-16 11:37:11,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:11,456 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-16 11:37:11,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:11,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:11,456 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:11,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 11:37:11,657 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:11,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:11,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-16 11:37:11,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:11,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511694836] [2020-10-16 11:37:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511694836] [2020-10-16 11:37:11,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461584596] [2020-10-16 11:37:11,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:11,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:11,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:11,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:11,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:11,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:11,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:11,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618593074] [2020-10-16 11:37:11,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:11,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:11,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:11,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:11,877 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-16 11:37:12,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:12,033 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-16 11:37:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:12,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:12,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:12,038 INFO L225 Difference]: With dead ends: 133 [2020-10-16 11:37:12,038 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:37:12,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:12,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:37:12,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-16 11:37:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-16 11:37:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-16 11:37:12,043 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-16 11:37:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:12,043 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-16 11:37:12,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:12,044 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-16 11:37:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:12,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:12,058 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:12,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:12,270 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:12,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-16 11:37:12,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:12,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616484093] [2020-10-16 11:37:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:12,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616484093] [2020-10-16 11:37:12,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914781975] [2020-10-16 11:37:12,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:12,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:12,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:12,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:12,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:12,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:12,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:12,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642168363] [2020-10-16 11:37:12,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:12,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:12,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:12,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:12,451 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:12,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:12,563 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-16 11:37:12,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:12,564 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:12,565 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:37:12,565 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 11:37:12,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:12,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 11:37:12,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-16 11:37:12,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-16 11:37:12,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-16 11:37:12,571 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-16 11:37:12,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:12,571 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-16 11:37:12,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-16 11:37:12,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:12,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:12,572 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:12,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 11:37:12,778 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:12,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:12,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-16 11:37:12,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:12,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190149636] [2020-10-16 11:37:12,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:12,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190149636] [2020-10-16 11:37:12,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180169622] [2020-10-16 11:37:12,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:12,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:12,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:12,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:12,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:12,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:12,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684805062] [2020-10-16 11:37:12,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:12,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:12,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:12,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:12,953 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-16 11:37:13,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:13,158 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-16 11:37:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:13,159 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:13,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:13,160 INFO L225 Difference]: With dead ends: 141 [2020-10-16 11:37:13,160 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 11:37:13,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:13,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 11:37:13,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-16 11:37:13,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-16 11:37:13,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-16 11:37:13,166 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-16 11:37:13,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:13,166 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-16 11:37:13,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:13,166 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-16 11:37:13,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:13,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:13,167 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:13,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 11:37:13,378 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:13,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:13,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-16 11:37:13,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:13,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867978572] [2020-10-16 11:37:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:13,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867978572] [2020-10-16 11:37:13,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673480602] [2020-10-16 11:37:13,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:13,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:13,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:13,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:13,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:13,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:13,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:13,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:13,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82289089] [2020-10-16 11:37:13,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:13,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:13,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:13,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:13,550 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-16 11:37:13,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:13,703 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-16 11:37:13,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:13,704 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:13,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:13,705 INFO L225 Difference]: With dead ends: 136 [2020-10-16 11:37:13,706 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 11:37:13,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 11:37:13,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-16 11:37:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 11:37:13,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-16 11:37:13,710 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-16 11:37:13,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:13,710 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-16 11:37:13,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:13,711 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-16 11:37:13,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:13,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:13,711 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:13,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-16 11:37:13,923 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:13,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-16 11:37:13,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:13,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070255295] [2020-10-16 11:37:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:13,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070255295] [2020-10-16 11:37:13,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032890934] [2020-10-16 11:37:13,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:14,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:14,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:14,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:14,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:14,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:14,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447642615] [2020-10-16 11:37:14,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:14,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:14,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:14,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:14,120 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-16 11:37:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:14,215 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-16 11:37:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:14,217 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:14,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:14,217 INFO L225 Difference]: With dead ends: 130 [2020-10-16 11:37:14,218 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:37:14,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:14,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:37:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-16 11:37:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 11:37:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-16 11:37:14,221 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-16 11:37:14,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:14,222 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-16 11:37:14,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:14,222 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-16 11:37:14,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:14,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:14,223 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:14,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 11:37:14,430 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:14,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:14,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-16 11:37:14,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:14,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39731002] [2020-10-16 11:37:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39731002] [2020-10-16 11:37:14,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904688334] [2020-10-16 11:37:14,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:14,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:14,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:14,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:14,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:14,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:14,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494862388] [2020-10-16 11:37:14,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:14,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:14,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:14,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:14,589 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-16 11:37:14,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:14,709 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-16 11:37:14,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:14,709 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:14,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:14,710 INFO L225 Difference]: With dead ends: 131 [2020-10-16 11:37:14,710 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 11:37:14,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:14,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 11:37:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-16 11:37:14,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 11:37:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-16 11:37:14,715 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-16 11:37:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:14,715 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-16 11:37:14,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:14,715 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-16 11:37:14,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:14,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:14,716 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:14,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 11:37:14,924 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:14,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-16 11:37:14,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:14,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706527749] [2020-10-16 11:37:14,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706527749] [2020-10-16 11:37:14,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711087813] [2020-10-16 11:37:14,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:15,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:15,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:15,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:15,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:15,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:15,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:15,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:15,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617917124] [2020-10-16 11:37:15,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:15,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:15,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:15,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:15,087 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:15,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:15,215 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-16 11:37:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:15,215 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:15,216 INFO L225 Difference]: With dead ends: 131 [2020-10-16 11:37:15,216 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 11:37:15,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 11:37:15,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-16 11:37:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 11:37:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-16 11:37:15,221 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-16 11:37:15,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:15,221 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-16 11:37:15,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:15,221 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-16 11:37:15,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:15,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:15,222 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:15,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:15,434 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:15,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-16 11:37:15,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:15,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577785441] [2020-10-16 11:37:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:15,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577785441] [2020-10-16 11:37:15,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283260474] [2020-10-16 11:37:15,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:15,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:15,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:15,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:15,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:15,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:15,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:15,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:15,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647128581] [2020-10-16 11:37:15,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:15,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:15,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:15,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:15,643 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:15,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:15,914 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-16 11:37:15,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:15,915 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:15,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:15,917 INFO L225 Difference]: With dead ends: 145 [2020-10-16 11:37:15,917 INFO L226 Difference]: Without dead ends: 140 [2020-10-16 11:37:15,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:15,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-16 11:37:15,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-16 11:37:15,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 11:37:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-16 11:37:15,925 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-16 11:37:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:15,925 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-16 11:37:15,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-16 11:37:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:15,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:15,926 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:16,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-16 11:37:16,141 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:16,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:16,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-16 11:37:16,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:16,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736419266] [2020-10-16 11:37:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:16,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736419266] [2020-10-16 11:37:16,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546987428] [2020-10-16 11:37:16,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:16,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:16,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:16,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:16,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:16,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:16,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274485995] [2020-10-16 11:37:16,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:16,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:16,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:16,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:16,355 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-16 11:37:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:16,583 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-16 11:37:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:16,584 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:16,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:16,585 INFO L225 Difference]: With dead ends: 135 [2020-10-16 11:37:16,586 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 11:37:16,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:16,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 11:37:16,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-16 11:37:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 11:37:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-16 11:37:16,592 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-16 11:37:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:16,593 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-16 11:37:16,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:16,593 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-16 11:37:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:16,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:16,594 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:16,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:16,808 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:16,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:16,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-16 11:37:16,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:16,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874965036] [2020-10-16 11:37:16,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:16,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874965036] [2020-10-16 11:37:16,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103173931] [2020-10-16 11:37:16,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:16,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:16,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:16,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:16,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:17,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:17,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:17,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-16 11:37:17,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395725287] [2020-10-16 11:37:17,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:37:17,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:17,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:37:17,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:17,090 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-16 11:37:17,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:17,195 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-16 11:37:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:17,195 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-16 11:37:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:17,197 INFO L225 Difference]: With dead ends: 143 [2020-10-16 11:37:17,197 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 11:37:17,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:17,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 11:37:17,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-16 11:37:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-16 11:37:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-16 11:37:17,203 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-16 11:37:17,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:17,203 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-16 11:37:17,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:37:17,204 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-16 11:37:17,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:17,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:17,205 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:17,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-16 11:37:17,416 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:17,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-16 11:37:17,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:17,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159803682] [2020-10-16 11:37:17,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:17,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159803682] [2020-10-16 11:37:17,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044314935] [2020-10-16 11:37:17,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:17,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:17,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:17,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:17,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:17,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:17,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453255526] [2020-10-16 11:37:17,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:17,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:17,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:17,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:17,642 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-16 11:37:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:17,683 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-16 11:37:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:17,684 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:17,685 INFO L225 Difference]: With dead ends: 132 [2020-10-16 11:37:17,685 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 11:37:17,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:17,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 11:37:17,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-16 11:37:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 11:37:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-16 11:37:17,690 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-16 11:37:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:17,690 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-16 11:37:17,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-16 11:37:17,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:17,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:17,691 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:17,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 11:37:17,900 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:17,901 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-16 11:37:17,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:17,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209986898] [2020-10-16 11:37:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:17,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209986898] [2020-10-16 11:37:17,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563049858] [2020-10-16 11:37:17,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:18,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:18,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:18,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:18,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:18,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:18,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503794593] [2020-10-16 11:37:18,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:18,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:18,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:18,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:18,143 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-16 11:37:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:18,198 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-16 11:37:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:18,198 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:18,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:18,199 INFO L225 Difference]: With dead ends: 143 [2020-10-16 11:37:18,199 INFO L226 Difference]: Without dead ends: 140 [2020-10-16 11:37:18,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-16 11:37:18,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-16 11:37:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 11:37:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-16 11:37:18,204 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-16 11:37:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:18,204 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-16 11:37:18,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:18,204 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-16 11:37:18,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:18,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:18,209 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:18,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-16 11:37:18,421 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:18,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-16 11:37:18,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:18,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943705053] [2020-10-16 11:37:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:18,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943705053] [2020-10-16 11:37:18,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684355414] [2020-10-16 11:37:18,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:18,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:37:18,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:18,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:18,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:18,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:18,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:18,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401999417] [2020-10-16 11:37:18,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:18,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:18,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:18,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:18,650 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-16 11:37:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:18,730 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-16 11:37:18,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:18,730 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:18,732 INFO L225 Difference]: With dead ends: 142 [2020-10-16 11:37:18,732 INFO L226 Difference]: Without dead ends: 139 [2020-10-16 11:37:18,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-16 11:37:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-16 11:37:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-16 11:37:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-16 11:37:18,737 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-16 11:37:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:18,737 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-16 11:37:18,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:18,737 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-16 11:37:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:18,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:18,738 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:18,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 11:37:18,949 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:18,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:18,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-16 11:37:18,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:18,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759798692] [2020-10-16 11:37:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759798692] [2020-10-16 11:37:19,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802587274] [2020-10-16 11:37:19,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:19,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:19,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:19,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:19,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935787738] [2020-10-16 11:37:19,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:19,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:19,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:19,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:19,164 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-16 11:37:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:19,265 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-16 11:37:19,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:19,266 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:19,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:19,267 INFO L225 Difference]: With dead ends: 141 [2020-10-16 11:37:19,267 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 11:37:19,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:19,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 11:37:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-16 11:37:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-16 11:37:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-16 11:37:19,271 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-16 11:37:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:19,272 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-16 11:37:19,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:19,273 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-16 11:37:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:19,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:19,273 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:19,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 11:37:19,474 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:19,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-16 11:37:19,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:19,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928037645] [2020-10-16 11:37:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928037645] [2020-10-16 11:37:19,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041420362] [2020-10-16 11:37:19,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:19,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:19,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:19,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:19,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:19,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:19,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:19,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95802172] [2020-10-16 11:37:19,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:19,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:19,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:19,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:19,662 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-16 11:37:19,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:19,816 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-16 11:37:19,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:19,817 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:19,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:19,818 INFO L225 Difference]: With dead ends: 150 [2020-10-16 11:37:19,818 INFO L226 Difference]: Without dead ends: 144 [2020-10-16 11:37:19,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:19,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-16 11:37:19,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-16 11:37:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-16 11:37:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-16 11:37:19,823 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-16 11:37:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:19,824 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-16 11:37:19,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-16 11:37:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:19,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:19,824 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:20,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:20,038 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:20,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:20,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-16 11:37:20,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:20,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540030848] [2020-10-16 11:37:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:20,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540030848] [2020-10-16 11:37:20,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503919173] [2020-10-16 11:37:20,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:20,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:20,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:20,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:20,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:20,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:20,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:20,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330270866] [2020-10-16 11:37:20,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:20,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:20,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:20,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:20,276 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-16 11:37:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:20,325 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-16 11:37:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:20,325 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:20,327 INFO L225 Difference]: With dead ends: 138 [2020-10-16 11:37:20,327 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 11:37:20,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 11:37:20,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-16 11:37:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-16 11:37:20,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-16 11:37:20,331 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-16 11:37:20,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:20,331 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-16 11:37:20,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-16 11:37:20,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:20,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:20,332 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:20,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 11:37:20,533 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:20,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-16 11:37:20,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:20,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714709394] [2020-10-16 11:37:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:20,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714709394] [2020-10-16 11:37:20,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428713438] [2020-10-16 11:37:20,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:20,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:20,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:20,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:20,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:20,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:20,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:20,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906764381] [2020-10-16 11:37:20,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:20,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:20,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:20,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:20,736 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-16 11:37:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:20,847 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-16 11:37:20,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:20,847 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:20,848 INFO L225 Difference]: With dead ends: 145 [2020-10-16 11:37:20,849 INFO L226 Difference]: Without dead ends: 143 [2020-10-16 11:37:20,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:20,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-16 11:37:20,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-16 11:37:20,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-16 11:37:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-16 11:37:20,852 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-16 11:37:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:20,852 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-16 11:37:20,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-16 11:37:20,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:20,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:20,853 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:21,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 11:37:21,063 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:21,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:21,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-16 11:37:21,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:21,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000108385] [2020-10-16 11:37:21,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000108385] [2020-10-16 11:37:21,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395881579] [2020-10-16 11:37:21,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:21,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:21,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:21,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:21,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:21,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:21,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397157514] [2020-10-16 11:37:21,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:21,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:21,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:21,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:21,268 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-16 11:37:21,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:21,391 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-16 11:37:21,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:21,391 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:21,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:21,393 INFO L225 Difference]: With dead ends: 150 [2020-10-16 11:37:21,393 INFO L226 Difference]: Without dead ends: 148 [2020-10-16 11:37:21,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:21,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-16 11:37:21,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-16 11:37:21,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-16 11:37:21,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-16 11:37:21,397 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-16 11:37:21,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:21,397 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-16 11:37:21,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:21,397 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-16 11:37:21,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:21,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:21,398 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:21,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:21,608 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:21,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:21,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-16 11:37:21,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:21,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982033987] [2020-10-16 11:37:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982033987] [2020-10-16 11:37:21,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131586460] [2020-10-16 11:37:21,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:21,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:21,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:21,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:21,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:21,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:21,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958207408] [2020-10-16 11:37:21,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:21,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:21,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:21,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:21,817 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-16 11:37:21,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:21,936 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-16 11:37:21,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:21,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:21,938 INFO L225 Difference]: With dead ends: 148 [2020-10-16 11:37:21,938 INFO L226 Difference]: Without dead ends: 146 [2020-10-16 11:37:21,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:21,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-16 11:37:21,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-16 11:37:21,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-16 11:37:21,942 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-16 11:37:21,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:21,943 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-16 11:37:21,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:21,943 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-16 11:37:21,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:21,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:21,944 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:22,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 11:37:22,159 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:22,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:22,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-16 11:37:22,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:22,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272148426] [2020-10-16 11:37:22,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:22,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272148426] [2020-10-16 11:37:22,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957570496] [2020-10-16 11:37:22,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:22,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:22,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:22,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:22,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:22,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:22,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:22,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476062617] [2020-10-16 11:37:22,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:22,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:22,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:22,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:22,383 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-16 11:37:22,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:22,503 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-16 11:37:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:22,504 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:22,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:22,505 INFO L225 Difference]: With dead ends: 149 [2020-10-16 11:37:22,505 INFO L226 Difference]: Without dead ends: 147 [2020-10-16 11:37:22,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:22,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-16 11:37:22,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-16 11:37:22,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:22,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-16 11:37:22,510 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-16 11:37:22,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:22,510 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-16 11:37:22,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:22,510 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-16 11:37:22,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:22,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:22,511 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:22,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:22,722 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:22,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:22,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-16 11:37:22,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:22,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076603323] [2020-10-16 11:37:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:22,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076603323] [2020-10-16 11:37:22,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289098982] [2020-10-16 11:37:22,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:22,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:22,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:22,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:22,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:22,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757631681] [2020-10-16 11:37:22,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:22,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:22,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:22,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:22,959 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-16 11:37:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:23,021 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-16 11:37:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:23,022 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:23,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:23,023 INFO L225 Difference]: With dead ends: 152 [2020-10-16 11:37:23,023 INFO L226 Difference]: Without dead ends: 150 [2020-10-16 11:37:23,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:23,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-16 11:37:23,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-16 11:37:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 11:37:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-16 11:37:23,028 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-16 11:37:23,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:23,028 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-16 11:37:23,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:23,029 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-16 11:37:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:23,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:23,029 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:23,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 11:37:23,230 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:23,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:23,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-16 11:37:23,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:23,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181962390] [2020-10-16 11:37:23,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181962390] [2020-10-16 11:37:23,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220564756] [2020-10-16 11:37:23,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:23,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:23,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:23,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:23,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:23,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:23,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879924792] [2020-10-16 11:37:23,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:23,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:23,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:23,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:23,450 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-16 11:37:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:23,589 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-16 11:37:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:23,589 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:23,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:23,591 INFO L225 Difference]: With dead ends: 153 [2020-10-16 11:37:23,591 INFO L226 Difference]: Without dead ends: 151 [2020-10-16 11:37:23,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:23,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-16 11:37:23,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-16 11:37:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:23,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-16 11:37:23,596 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-16 11:37:23,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:23,597 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-16 11:37:23,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-16 11:37:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:23,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:23,598 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:23,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-16 11:37:23,811 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:23,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-16 11:37:23,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:23,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211848194] [2020-10-16 11:37:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211848194] [2020-10-16 11:37:23,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114084225] [2020-10-16 11:37:23,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:23,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:23,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:23,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:23,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:23,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:23,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582826946] [2020-10-16 11:37:23,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:23,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:23,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:24,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:24,000 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-16 11:37:24,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:24,142 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 11:37:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:24,143 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:24,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:24,144 INFO L225 Difference]: With dead ends: 156 [2020-10-16 11:37:24,144 INFO L226 Difference]: Without dead ends: 154 [2020-10-16 11:37:24,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:24,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-16 11:37:24,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-16 11:37:24,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-16 11:37:24,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-16 11:37:24,149 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-16 11:37:24,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:24,149 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-16 11:37:24,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:24,150 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-16 11:37:24,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:24,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:24,150 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:24,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 11:37:24,357 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:24,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:24,358 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-16 11:37:24,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:24,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739241663] [2020-10-16 11:37:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:24,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739241663] [2020-10-16 11:37:24,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584323560] [2020-10-16 11:37:24,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:24,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:24,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:24,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:24,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:24,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:24,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:24,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396857522] [2020-10-16 11:37:24,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:24,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:24,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:24,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:24,560 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-16 11:37:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:24,638 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-16 11:37:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:24,639 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:24,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:24,640 INFO L225 Difference]: With dead ends: 148 [2020-10-16 11:37:24,640 INFO L226 Difference]: Without dead ends: 146 [2020-10-16 11:37:24,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-16 11:37:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-16 11:37:24,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-16 11:37:24,645 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-16 11:37:24,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:24,645 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-16 11:37:24,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-16 11:37:24,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:24,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:24,646 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:24,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-16 11:37:24,853 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:24,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-16 11:37:24,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:24,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141329513] [2020-10-16 11:37:24,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:24,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141329513] [2020-10-16 11:37:24,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358901749] [2020-10-16 11:37:24,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:24,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:24,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:24,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:24,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:25,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:25,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167647378] [2020-10-16 11:37:25,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:25,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:25,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:25,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:25,043 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-16 11:37:25,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:25,192 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-16 11:37:25,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:25,193 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:25,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:25,194 INFO L225 Difference]: With dead ends: 157 [2020-10-16 11:37:25,194 INFO L226 Difference]: Without dead ends: 155 [2020-10-16 11:37:25,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:25,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-16 11:37:25,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-16 11:37:25,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-16 11:37:25,198 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-16 11:37:25,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:25,198 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-16 11:37:25,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-16 11:37:25,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:25,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:25,199 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:25,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:25,410 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:25,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:25,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-16 11:37:25,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:25,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698438880] [2020-10-16 11:37:25,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698438880] [2020-10-16 11:37:25,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834400702] [2020-10-16 11:37:25,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:25,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:25,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:25,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:37:25,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:25,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:37:25,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597559601] [2020-10-16 11:37:25,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:37:25,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:25,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:37:25,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:25,546 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-10-16 11:37:25,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:25,631 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-16 11:37:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:25,631 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:37:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:25,633 INFO L225 Difference]: With dead ends: 149 [2020-10-16 11:37:25,633 INFO L226 Difference]: Without dead ends: 147 [2020-10-16 11:37:25,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:25,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-16 11:37:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-16 11:37:25,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 11:37:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 11:37:25,636 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 11:37:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:25,636 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 11:37:25,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:37:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 11:37:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:25,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:25,637 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:25,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 11:37:25,838 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:25,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:25,838 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-16 11:37:25,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:25,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081465637] [2020-10-16 11:37:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081465637] [2020-10-16 11:37:25,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881171059] [2020-10-16 11:37:25,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:25,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:25,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:26,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:26,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:26,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:26,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226155249] [2020-10-16 11:37:26,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:26,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:26,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:26,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:26,037 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 11:37:26,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:26,278 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-16 11:37:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:26,279 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:26,280 INFO L225 Difference]: With dead ends: 164 [2020-10-16 11:37:26,280 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 11:37:26,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 11:37:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-16 11:37:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 11:37:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-16 11:37:26,285 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-16 11:37:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:26,285 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-16 11:37:26,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-16 11:37:26,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:26,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:26,286 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:26,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 11:37:26,489 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:26,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-16 11:37:26,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:26,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118802672] [2020-10-16 11:37:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:26,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118802672] [2020-10-16 11:37:26,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089306945] [2020-10-16 11:37:26,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:26,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:26,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:26,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:26,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:26,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:26,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:26,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086212118] [2020-10-16 11:37:26,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:26,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:26,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:26,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:26,696 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-16 11:37:26,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:26,878 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 11:37:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:26,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:26,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:26,881 INFO L225 Difference]: With dead ends: 156 [2020-10-16 11:37:26,881 INFO L226 Difference]: Without dead ends: 154 [2020-10-16 11:37:26,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-16 11:37:26,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-16 11:37:26,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 11:37:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 11:37:26,885 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 11:37:26,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:26,885 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 11:37:26,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 11:37:26,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:26,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:26,886 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:27,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:27,087 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:27,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:27,087 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-16 11:37:27,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:27,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75163702] [2020-10-16 11:37:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:27,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75163702] [2020-10-16 11:37:27,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035126881] [2020-10-16 11:37:27,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:27,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:27,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:27,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:27,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:27,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:27,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:27,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:27,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877995337] [2020-10-16 11:37:27,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:27,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:27,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:27,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:27,361 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 11:37:27,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:27,830 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-16 11:37:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:37:27,830 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:27,832 INFO L225 Difference]: With dead ends: 176 [2020-10-16 11:37:27,832 INFO L226 Difference]: Without dead ends: 171 [2020-10-16 11:37:27,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:37:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-16 11:37:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-16 11:37:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 11:37:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 11:37:27,840 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 11:37:27,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:27,840 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 11:37:27,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 11:37:27,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:27,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:27,841 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:28,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-16 11:37:28,053 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:28,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:28,054 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-16 11:37:28,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:28,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745932076] [2020-10-16 11:37:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:28,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745932076] [2020-10-16 11:37:28,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549757488] [2020-10-16 11:37:28,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:28,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:28,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:28,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:28,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:28,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:28,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:28,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:28,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887560539] [2020-10-16 11:37:28,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:28,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:28,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:28,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:28,251 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 11:37:28,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:28,465 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-16 11:37:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:28,465 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:28,466 INFO L225 Difference]: With dead ends: 166 [2020-10-16 11:37:28,466 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 11:37:28,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:28,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 11:37:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-16 11:37:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-16 11:37:28,471 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-16 11:37:28,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:28,471 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-16 11:37:28,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:28,471 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-16 11:37:28,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:28,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:28,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:28,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:28,682 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:28,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:28,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-16 11:37:28,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:28,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402970376] [2020-10-16 11:37:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:28,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402970376] [2020-10-16 11:37:28,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598556537] [2020-10-16 11:37:28,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:28,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:28,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:28,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:28,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:28,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:28,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:28,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738742077] [2020-10-16 11:37:28,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:28,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:28,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:28,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:28,914 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-16 11:37:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:29,075 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-16 11:37:29,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:29,075 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:29,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:29,077 INFO L225 Difference]: With dead ends: 163 [2020-10-16 11:37:29,077 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 11:37:29,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:29,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 11:37:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-16 11:37:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-16 11:37:29,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-16 11:37:29,080 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-16 11:37:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:29,081 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-16 11:37:29,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-16 11:37:29,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:29,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:29,082 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:29,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 11:37:29,292 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:29,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:29,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-16 11:37:29,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:29,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309619667] [2020-10-16 11:37:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:29,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309619667] [2020-10-16 11:37:29,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011527737] [2020-10-16 11:37:29,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:29,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:29,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:29,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:29,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:29,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:29,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:29,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991266225] [2020-10-16 11:37:29,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:29,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:29,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:29,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:29,486 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-16 11:37:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:29,746 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-16 11:37:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:29,747 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:29,748 INFO L225 Difference]: With dead ends: 170 [2020-10-16 11:37:29,748 INFO L226 Difference]: Without dead ends: 168 [2020-10-16 11:37:29,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-16 11:37:29,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-16 11:37:29,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-16 11:37:29,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-16 11:37:29,752 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-16 11:37:29,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:29,752 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-16 11:37:29,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:29,753 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-16 11:37:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:29,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:29,753 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:29,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:29,954 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:29,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:29,955 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-16 11:37:29,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:29,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893315484] [2020-10-16 11:37:29,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:30,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893315484] [2020-10-16 11:37:30,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030271787] [2020-10-16 11:37:30,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:30,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:30,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:30,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:30,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:30,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:30,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976434847] [2020-10-16 11:37:30,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:30,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:30,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:30,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:30,124 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-16 11:37:30,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:30,407 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-16 11:37:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:30,408 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:30,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:30,409 INFO L225 Difference]: With dead ends: 177 [2020-10-16 11:37:30,409 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 11:37:30,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:37:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 11:37:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-16 11:37:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-16 11:37:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-16 11:37:30,413 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-16 11:37:30,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:30,413 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-16 11:37:30,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:30,414 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-16 11:37:30,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:30,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:30,414 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:30,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 11:37:30,625 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:30,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:30,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-16 11:37:30,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:30,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067600223] [2020-10-16 11:37:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:30,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067600223] [2020-10-16 11:37:30,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383382009] [2020-10-16 11:37:30,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:30,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:30,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:30,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:30,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:30,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:30,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:30,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:30,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905308210] [2020-10-16 11:37:30,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:30,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:30,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:30,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:30,812 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-16 11:37:31,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:31,197 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-16 11:37:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:37:31,198 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:31,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:31,199 INFO L225 Difference]: With dead ends: 190 [2020-10-16 11:37:31,200 INFO L226 Difference]: Without dead ends: 182 [2020-10-16 11:37:31,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:37:31,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-16 11:37:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-16 11:37:31,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-16 11:37:31,203 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-16 11:37:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:31,203 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-16 11:37:31,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-16 11:37:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:31,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:31,204 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:31,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 11:37:31,413 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:31,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:31,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-16 11:37:31,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:31,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146919657] [2020-10-16 11:37:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:31,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146919657] [2020-10-16 11:37:31,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393979248] [2020-10-16 11:37:31,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:31,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:37:31,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:31,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:31,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:31,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:31,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:31,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:31,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926764177] [2020-10-16 11:37:31,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:31,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:31,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:31,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:31,578 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-16 11:37:31,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:31,906 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-16 11:37:31,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:31,906 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:31,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:31,908 INFO L225 Difference]: With dead ends: 180 [2020-10-16 11:37:31,908 INFO L226 Difference]: Without dead ends: 175 [2020-10-16 11:37:31,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:37:31,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-16 11:37:31,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-16 11:37:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-16 11:37:31,910 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-16 11:37:31,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:31,911 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-16 11:37:31,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:31,911 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-16 11:37:31,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:31,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:31,911 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:32,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 11:37:32,112 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:32,113 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-16 11:37:32,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:32,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689266975] [2020-10-16 11:37:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:32,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689266975] [2020-10-16 11:37:32,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940879343] [2020-10-16 11:37:32,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:32,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:32,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:32,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:32,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:32,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:32,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:32,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450097841] [2020-10-16 11:37:32,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:32,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:32,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:32,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:32,303 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-16 11:37:32,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:32,444 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-16 11:37:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:32,444 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:32,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:32,446 INFO L225 Difference]: With dead ends: 164 [2020-10-16 11:37:32,446 INFO L226 Difference]: Without dead ends: 162 [2020-10-16 11:37:32,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:32,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-16 11:37:32,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-16 11:37:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-16 11:37:32,450 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-16 11:37:32,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:32,451 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-16 11:37:32,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-16 11:37:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:32,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:32,452 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:32,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 11:37:32,655 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:32,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:32,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-16 11:37:32,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:32,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685754603] [2020-10-16 11:37:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:32,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685754603] [2020-10-16 11:37:32,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004454475] [2020-10-16 11:37:32,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:32,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:32,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:32,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:32,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:32,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:32,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:32,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525714162] [2020-10-16 11:37:32,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:32,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:32,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:32,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:32,875 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-16 11:37:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:33,065 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-16 11:37:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:33,066 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:33,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:33,067 INFO L225 Difference]: With dead ends: 161 [2020-10-16 11:37:33,067 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 11:37:33,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:33,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 11:37:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-16 11:37:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-16 11:37:33,071 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-16 11:37:33,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:33,072 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-16 11:37:33,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-16 11:37:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:33,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:33,073 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:33,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 11:37:33,281 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:33,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:33,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-16 11:37:33,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:33,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885767817] [2020-10-16 11:37:33,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:33,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885767817] [2020-10-16 11:37:33,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650245333] [2020-10-16 11:37:33,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:33,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:37:33,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:33,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:33,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:33,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:33,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:33,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112044552] [2020-10-16 11:37:33,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:33,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:33,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:33,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:33,481 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-16 11:37:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:33,665 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-16 11:37:33,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:33,665 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:33,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:33,666 INFO L225 Difference]: With dead ends: 165 [2020-10-16 11:37:33,666 INFO L226 Difference]: Without dead ends: 163 [2020-10-16 11:37:33,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:33,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-16 11:37:33,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-16 11:37:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:33,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-16 11:37:33,670 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-16 11:37:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:33,670 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-16 11:37:33,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:33,670 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-16 11:37:33,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:33,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:33,671 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:33,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-16 11:37:33,874 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:33,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:33,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-16 11:37:33,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:33,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60569274] [2020-10-16 11:37:33,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:33,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60569274] [2020-10-16 11:37:33,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270149071] [2020-10-16 11:37:33,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:33,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:33,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:34,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:34,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:34,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883280906] [2020-10-16 11:37:34,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:34,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:34,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:34,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:34,047 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-16 11:37:34,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:34,220 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-16 11:37:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:34,221 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:34,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:34,222 INFO L225 Difference]: With dead ends: 167 [2020-10-16 11:37:34,222 INFO L226 Difference]: Without dead ends: 165 [2020-10-16 11:37:34,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:34,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-16 11:37:34,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-16 11:37:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-16 11:37:34,226 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-16 11:37:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:34,226 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-16 11:37:34,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-16 11:37:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:34,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:34,227 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:34,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:34,435 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:34,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:34,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-16 11:37:34,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:34,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995395056] [2020-10-16 11:37:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:34,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995395056] [2020-10-16 11:37:34,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569012908] [2020-10-16 11:37:34,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:34,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:34,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:34,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:34,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:34,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:34,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:34,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175481121] [2020-10-16 11:37:34,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:34,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:34,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:34,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:34,637 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-16 11:37:34,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:34,898 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-16 11:37:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:37:34,899 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:34,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:34,901 INFO L225 Difference]: With dead ends: 168 [2020-10-16 11:37:34,901 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 11:37:34,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:34,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 11:37:34,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-16 11:37:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:34,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-16 11:37:34,903 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-16 11:37:34,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:34,903 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-16 11:37:34,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:34,904 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-16 11:37:34,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:34,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:34,904 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:35,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:35,105 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:35,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:35,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-16 11:37:35,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:35,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653881250] [2020-10-16 11:37:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653881250] [2020-10-16 11:37:35,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952164726] [2020-10-16 11:37:35,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:35,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:35,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:35,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:35,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:35,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:35,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:35,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333911859] [2020-10-16 11:37:35,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:35,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:35,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:35,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:35,274 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-16 11:37:35,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:35,460 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-16 11:37:35,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:35,461 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:35,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:35,462 INFO L225 Difference]: With dead ends: 160 [2020-10-16 11:37:35,462 INFO L226 Difference]: Without dead ends: 155 [2020-10-16 11:37:35,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:35,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-16 11:37:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-16 11:37:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:35,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-16 11:37:35,465 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-16 11:37:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:35,466 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-16 11:37:35,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:35,466 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-16 11:37:35,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:35,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:35,466 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:35,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:35,674 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:35,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-16 11:37:35,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:35,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259673401] [2020-10-16 11:37:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259673401] [2020-10-16 11:37:35,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454850666] [2020-10-16 11:37:35,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:35,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:35,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:35,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:35,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:35,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:35,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:35,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419777019] [2020-10-16 11:37:35,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:35,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:35,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:35,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:35,900 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-16 11:37:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:36,228 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-16 11:37:36,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:36,228 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:36,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:36,230 INFO L225 Difference]: With dead ends: 189 [2020-10-16 11:37:36,231 INFO L226 Difference]: Without dead ends: 181 [2020-10-16 11:37:36,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:37:36,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-16 11:37:36,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-16 11:37:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:36,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-16 11:37:36,234 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-16 11:37:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:36,234 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-16 11:37:36,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:36,235 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-16 11:37:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:36,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:36,235 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:36,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:36,444 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:36,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:36,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-16 11:37:36,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:36,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000126011] [2020-10-16 11:37:36,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:36,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000126011] [2020-10-16 11:37:36,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464351398] [2020-10-16 11:37:36,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:36,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:36,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:36,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:36,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:36,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:36,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:36,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16888550] [2020-10-16 11:37:36,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:36,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:36,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:36,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:36,628 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-16 11:37:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:36,876 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-16 11:37:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:37:36,876 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:36,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:36,878 INFO L225 Difference]: With dead ends: 169 [2020-10-16 11:37:36,878 INFO L226 Difference]: Without dead ends: 167 [2020-10-16 11:37:36,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:36,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-16 11:37:36,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-16 11:37:36,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-16 11:37:36,881 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-16 11:37:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:36,881 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-16 11:37:36,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-16 11:37:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:36,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:36,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:37,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-16 11:37:37,084 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:37,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:37,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-16 11:37:37,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:37,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448252375] [2020-10-16 11:37:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:37,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:37,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448252375] [2020-10-16 11:37:37,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759317985] [2020-10-16 11:37:37,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:37,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:37,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:37,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:37,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:37,244 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:37,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:37,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:37,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348994528] [2020-10-16 11:37:37,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:37,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:37,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:37,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:37,253 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-16 11:37:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:37,581 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-16 11:37:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:37:37,582 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:37,584 INFO L225 Difference]: With dead ends: 192 [2020-10-16 11:37:37,584 INFO L226 Difference]: Without dead ends: 184 [2020-10-16 11:37:37,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:37:37,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-16 11:37:37,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-16 11:37:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-16 11:37:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-16 11:37:37,587 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-16 11:37:37,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:37,588 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-16 11:37:37,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-16 11:37:37,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:37,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:37,588 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:37,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:37,791 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:37,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:37,792 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-16 11:37:37,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:37,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690335372] [2020-10-16 11:37:37,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:37,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690335372] [2020-10-16 11:37:37,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681452555] [2020-10-16 11:37:37,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:37,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:37,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:37,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:37,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:37,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:37,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006641567] [2020-10-16 11:37:37,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:37,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:37,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:37,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:37,967 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-16 11:37:38,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:38,290 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-16 11:37:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:38,291 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:38,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:38,293 INFO L225 Difference]: With dead ends: 180 [2020-10-16 11:37:38,293 INFO L226 Difference]: Without dead ends: 175 [2020-10-16 11:37:38,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:37:38,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-16 11:37:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-16 11:37:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-16 11:37:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-16 11:37:38,297 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-16 11:37:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:38,297 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-16 11:37:38,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-16 11:37:38,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:38,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:38,297 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:38,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-16 11:37:38,498 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:38,499 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-16 11:37:38,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:38,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257448780] [2020-10-16 11:37:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:38,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257448780] [2020-10-16 11:37:38,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236820613] [2020-10-16 11:37:38,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:38,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:38,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:38,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:38,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:38,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:38,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:38,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 11:37:38,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561933225] [2020-10-16 11:37:38,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:37:38,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:38,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:37:38,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:38,737 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-16 11:37:38,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:38,879 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-16 11:37:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:38,880 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-16 11:37:38,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:38,881 INFO L225 Difference]: With dead ends: 164 [2020-10-16 11:37:38,881 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 11:37:38,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:38,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 11:37:38,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-16 11:37:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 11:37:38,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-16 11:37:38,884 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-16 11:37:38,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:38,884 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-16 11:37:38,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:37:38,885 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-16 11:37:38,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:38,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:38,885 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:39,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:39,088 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:39,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:39,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-16 11:37:39,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:39,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310047607] [2020-10-16 11:37:39,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:39,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310047607] [2020-10-16 11:37:39,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304617984] [2020-10-16 11:37:39,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:39,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:37:39,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:39,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:39,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:39,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:39,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:39,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658262939] [2020-10-16 11:37:39,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:39,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:39,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:39,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:39,371 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-16 11:37:39,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:39,419 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 11:37:39,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:39,419 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:39,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:39,420 INFO L225 Difference]: With dead ends: 156 [2020-10-16 11:37:39,421 INFO L226 Difference]: Without dead ends: 153 [2020-10-16 11:37:39,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:39,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-16 11:37:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-16 11:37:39,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-16 11:37:39,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-16 11:37:39,424 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-16 11:37:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:39,425 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-16 11:37:39,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:39,425 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-16 11:37:39,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:39,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:39,425 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:39,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-16 11:37:39,632 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:39,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:39,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-16 11:37:39,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:39,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877715690] [2020-10-16 11:37:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:39,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877715690] [2020-10-16 11:37:39,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682254347] [2020-10-16 11:37:39,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:39,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:39,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:39,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:39,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:39,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:39,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:39,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812585616] [2020-10-16 11:37:39,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:39,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:39,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:39,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:39,889 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-16 11:37:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:39,953 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-16 11:37:39,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:39,954 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:39,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:39,955 INFO L225 Difference]: With dead ends: 170 [2020-10-16 11:37:39,955 INFO L226 Difference]: Without dead ends: 167 [2020-10-16 11:37:39,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:39,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-16 11:37:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-16 11:37:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-16 11:37:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-16 11:37:39,958 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-16 11:37:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:39,960 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-16 11:37:39,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:39,960 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-16 11:37:39,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:39,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:39,960 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:40,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:40,165 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:40,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-16 11:37:40,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:40,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204479600] [2020-10-16 11:37:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:40,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204479600] [2020-10-16 11:37:40,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519911756] [2020-10-16 11:37:40,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:40,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:40,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:40,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:40,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:40,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:40,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:40,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485542355] [2020-10-16 11:37:40,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:40,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:40,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:40,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:40,404 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-16 11:37:40,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:40,494 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-16 11:37:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:40,494 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:40,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:40,496 INFO L225 Difference]: With dead ends: 169 [2020-10-16 11:37:40,496 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 11:37:40,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 11:37:40,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-16 11:37:40,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-16 11:37:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-16 11:37:40,505 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-16 11:37:40,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:40,505 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-16 11:37:40,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:40,505 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-16 11:37:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:40,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:40,506 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:40,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:40,716 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:40,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:40,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-16 11:37:40,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:40,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341572934] [2020-10-16 11:37:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:40,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341572934] [2020-10-16 11:37:40,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841105748] [2020-10-16 11:37:40,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:40,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:37:40,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:40,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:40,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:40,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:40,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:40,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545768304] [2020-10-16 11:37:40,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:40,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:40,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:40,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:40,977 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-16 11:37:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:41,078 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-16 11:37:41,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:41,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:41,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:41,080 INFO L225 Difference]: With dead ends: 168 [2020-10-16 11:37:41,080 INFO L226 Difference]: Without dead ends: 165 [2020-10-16 11:37:41,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:41,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-16 11:37:41,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-16 11:37:41,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-16 11:37:41,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-16 11:37:41,084 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-16 11:37:41,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:41,085 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-16 11:37:41,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:41,085 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-16 11:37:41,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:41,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:41,085 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:41,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-16 11:37:41,296 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:41,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:41,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-16 11:37:41,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:41,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475630665] [2020-10-16 11:37:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:41,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475630665] [2020-10-16 11:37:41,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776384495] [2020-10-16 11:37:41,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:41,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:41,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:41,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:41,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:41,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093561423] [2020-10-16 11:37:41,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:41,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:41,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:41,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:41,524 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-16 11:37:41,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:41,659 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-16 11:37:41,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:41,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:41,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:41,661 INFO L225 Difference]: With dead ends: 167 [2020-10-16 11:37:41,661 INFO L226 Difference]: Without dead ends: 164 [2020-10-16 11:37:41,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-16 11:37:41,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-16 11:37:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-16 11:37:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-16 11:37:41,663 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-16 11:37:41,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:41,664 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-16 11:37:41,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-16 11:37:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:41,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:41,664 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:41,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:41,868 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:41,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:41,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-16 11:37:41,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:41,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454123761] [2020-10-16 11:37:41,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:41,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454123761] [2020-10-16 11:37:41,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601199625] [2020-10-16 11:37:41,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:41,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:41,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:41,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:41,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:42,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:42,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:42,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:42,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384392988] [2020-10-16 11:37:42,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:42,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:42,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:42,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:42,095 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-16 11:37:42,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:42,285 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-16 11:37:42,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:42,286 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:42,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:42,287 INFO L225 Difference]: With dead ends: 176 [2020-10-16 11:37:42,287 INFO L226 Difference]: Without dead ends: 170 [2020-10-16 11:37:42,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-16 11:37:42,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-16 11:37:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-16 11:37:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-16 11:37:42,291 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-16 11:37:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:42,292 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-16 11:37:42,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:42,292 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-16 11:37:42,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:42,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:42,292 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:42,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:42,501 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:42,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:42,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-16 11:37:42,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:42,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979749663] [2020-10-16 11:37:42,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:42,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979749663] [2020-10-16 11:37:42,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181724311] [2020-10-16 11:37:42,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:42,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:42,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:42,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:42,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:42,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:42,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:42,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43308922] [2020-10-16 11:37:42,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:42,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:42,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:42,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:42,869 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-16 11:37:42,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:42,945 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-16 11:37:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:42,946 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:42,948 INFO L225 Difference]: With dead ends: 163 [2020-10-16 11:37:42,948 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 11:37:42,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:42,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 11:37:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-16 11:37:42,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-16 11:37:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-16 11:37:42,953 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-16 11:37:42,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:42,954 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-16 11:37:42,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:42,954 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-16 11:37:42,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:42,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:42,955 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:43,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-16 11:37:43,168 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:43,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:43,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-16 11:37:43,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:43,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890684446] [2020-10-16 11:37:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:43,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890684446] [2020-10-16 11:37:43,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515165522] [2020-10-16 11:37:43,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:43,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:43,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:43,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:43,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:43,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:43,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:43,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620324617] [2020-10-16 11:37:43,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:43,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:43,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:43,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:43,547 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-16 11:37:43,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:43,686 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-16 11:37:43,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:43,687 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:43,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:43,688 INFO L225 Difference]: With dead ends: 172 [2020-10-16 11:37:43,688 INFO L226 Difference]: Without dead ends: 170 [2020-10-16 11:37:43,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:43,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-16 11:37:43,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-16 11:37:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:37:43,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-16 11:37:43,692 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-16 11:37:43,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:43,692 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-16 11:37:43,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:43,692 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-16 11:37:43,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:43,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:43,693 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:43,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:43,902 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:43,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:43,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-16 11:37:43,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:43,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765904757] [2020-10-16 11:37:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:43,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765904757] [2020-10-16 11:37:43,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036175890] [2020-10-16 11:37:43,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:44,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:44,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:44,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:44,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:44,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:44,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:44,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921692438] [2020-10-16 11:37:44,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:44,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:44,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:44,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:44,749 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-16 11:37:44,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:44,957 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-16 11:37:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:44,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:44,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:44,959 INFO L225 Difference]: With dead ends: 179 [2020-10-16 11:37:44,959 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 11:37:44,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 11:37:44,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-16 11:37:44,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-16 11:37:44,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-16 11:37:44,964 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-16 11:37:44,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:44,964 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-16 11:37:44,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:44,964 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-16 11:37:44,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:44,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:44,965 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:45,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-16 11:37:45,172 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:45,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:45,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-16 11:37:45,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:45,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227337909] [2020-10-16 11:37:45,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:45,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227337909] [2020-10-16 11:37:45,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018536643] [2020-10-16 11:37:45,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:45,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:45,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:45,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:45,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:45,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:45,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:45,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109312542] [2020-10-16 11:37:45,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:45,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:45,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:45,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:45,415 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-16 11:37:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:45,609 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-16 11:37:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:45,609 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:45,611 INFO L225 Difference]: With dead ends: 179 [2020-10-16 11:37:45,611 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 11:37:45,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 11:37:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-16 11:37:45,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:37:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-16 11:37:45,615 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-16 11:37:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:45,615 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-16 11:37:45,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:45,616 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-16 11:37:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:45,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:45,616 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:45,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 11:37:45,827 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:45,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:45,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-16 11:37:45,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:45,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790667504] [2020-10-16 11:37:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:45,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790667504] [2020-10-16 11:37:45,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323599108] [2020-10-16 11:37:45,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:45,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:45,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:45,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:45,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:46,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:46,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:46,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247668117] [2020-10-16 11:37:46,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:46,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:46,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:46,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:46,052 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-16 11:37:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:46,255 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-16 11:37:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:46,256 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:46,258 INFO L225 Difference]: With dead ends: 184 [2020-10-16 11:37:46,258 INFO L226 Difference]: Without dead ends: 182 [2020-10-16 11:37:46,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-16 11:37:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-16 11:37:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:37:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-16 11:37:46,261 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-16 11:37:46,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:46,261 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-16 11:37:46,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-16 11:37:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:46,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:46,262 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:46,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-16 11:37:46,471 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:46,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:46,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-16 11:37:46,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:46,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374214285] [2020-10-16 11:37:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:46,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374214285] [2020-10-16 11:37:46,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124652087] [2020-10-16 11:37:46,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:46,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:46,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:46,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:46,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:46,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642871223] [2020-10-16 11:37:46,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:46,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:46,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:46,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:46,722 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-16 11:37:46,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:46,947 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-16 11:37:46,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:46,947 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:46,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:46,949 INFO L225 Difference]: With dead ends: 179 [2020-10-16 11:37:46,949 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 11:37:46,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 11:37:46,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-16 11:37:46,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-16 11:37:46,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-16 11:37:46,953 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-16 11:37:46,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:46,953 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-16 11:37:46,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:46,953 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-16 11:37:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:46,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:46,954 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:47,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:47,164 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:47,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:47,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-16 11:37:47,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:47,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83010562] [2020-10-16 11:37:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:47,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83010562] [2020-10-16 11:37:47,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881447569] [2020-10-16 11:37:47,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:47,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:47,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:47,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:47,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:47,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:47,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:47,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296305527] [2020-10-16 11:37:47,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:47,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:47,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:47,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:47,410 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-16 11:37:47,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:47,576 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-16 11:37:47,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:47,577 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:47,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:47,578 INFO L225 Difference]: With dead ends: 176 [2020-10-16 11:37:47,578 INFO L226 Difference]: Without dead ends: 174 [2020-10-16 11:37:47,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:47,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-16 11:37:47,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-16 11:37:47,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:37:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-16 11:37:47,582 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-16 11:37:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:47,582 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-16 11:37:47,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-16 11:37:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:47,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:47,583 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:47,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:47,784 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:47,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-16 11:37:47,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:47,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976456616] [2020-10-16 11:37:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:47,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976456616] [2020-10-16 11:37:47,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706182713] [2020-10-16 11:37:47,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:47,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:37:47,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:47,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:47,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:48,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:48,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:48,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662537373] [2020-10-16 11:37:48,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:48,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:48,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:48,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:48,032 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-16 11:37:48,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:48,232 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-16 11:37:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:48,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:48,234 INFO L225 Difference]: With dead ends: 185 [2020-10-16 11:37:48,234 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 11:37:48,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:48,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 11:37:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-16 11:37:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:37:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-16 11:37:48,238 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-16 11:37:48,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:48,238 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-16 11:37:48,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:48,238 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-16 11:37:48,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:48,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:48,239 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:48,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:48,448 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:48,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-16 11:37:48,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:48,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042633789] [2020-10-16 11:37:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:48,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042633789] [2020-10-16 11:37:48,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563318510] [2020-10-16 11:37:48,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:48,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:48,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:48,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:48,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:48,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:48,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:48,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699859587] [2020-10-16 11:37:48,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:48,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:48,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:48,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:48,694 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-16 11:37:48,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:48,892 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-16 11:37:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:48,893 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:48,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:48,894 INFO L225 Difference]: With dead ends: 185 [2020-10-16 11:37:48,894 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 11:37:48,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:48,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 11:37:48,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-16 11:37:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-16 11:37:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-16 11:37:48,898 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-16 11:37:48,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:48,899 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-16 11:37:48,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:48,899 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-16 11:37:48,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:48,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:48,899 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:49,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:49,111 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:49,111 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-16 11:37:49,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:49,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70178655] [2020-10-16 11:37:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:49,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70178655] [2020-10-16 11:37:49,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985448316] [2020-10-16 11:37:49,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:49,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:49,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:49,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:49,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:49,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:49,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:49,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689219800] [2020-10-16 11:37:49,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:49,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:49,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:49,436 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-16 11:37:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:49,494 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-16 11:37:49,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:49,495 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:49,496 INFO L225 Difference]: With dead ends: 182 [2020-10-16 11:37:49,496 INFO L226 Difference]: Without dead ends: 180 [2020-10-16 11:37:49,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:49,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-16 11:37:49,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-16 11:37:49,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:37:49,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-16 11:37:49,502 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-16 11:37:49,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:49,502 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-16 11:37:49,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:49,503 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-16 11:37:49,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:49,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:49,503 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:49,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-16 11:37:49,714 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:49,714 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-16 11:37:49,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:49,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628293500] [2020-10-16 11:37:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:49,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628293500] [2020-10-16 11:37:49,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134417428] [2020-10-16 11:37:49,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:49,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:49,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:49,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:49,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:49,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:49,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:49,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367258018] [2020-10-16 11:37:49,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:49,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:49,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:49,972 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-16 11:37:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:50,148 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-16 11:37:50,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:50,149 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:50,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:50,150 INFO L225 Difference]: With dead ends: 185 [2020-10-16 11:37:50,151 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 11:37:50,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 11:37:50,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-16 11:37:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-16 11:37:50,155 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-16 11:37:50,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:50,155 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-16 11:37:50,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:50,155 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-16 11:37:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:50,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:50,156 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:50,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:50,360 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:50,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:50,360 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-16 11:37:50,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:50,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733726350] [2020-10-16 11:37:50,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:50,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733726350] [2020-10-16 11:37:50,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388151271] [2020-10-16 11:37:50,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:50,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:50,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:51,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:51,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:51,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361785671] [2020-10-16 11:37:51,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:51,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:51,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:51,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:51,112 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-16 11:37:51,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:51,336 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-16 11:37:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:51,337 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:51,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:51,338 INFO L225 Difference]: With dead ends: 191 [2020-10-16 11:37:51,338 INFO L226 Difference]: Without dead ends: 189 [2020-10-16 11:37:51,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:51,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-16 11:37:51,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-16 11:37:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:37:51,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-16 11:37:51,342 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-16 11:37:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:51,342 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-16 11:37:51,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:51,342 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-16 11:37:51,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:51,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:51,343 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:51,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:51,545 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:51,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:51,545 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-16 11:37:51,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:51,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191030914] [2020-10-16 11:37:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:51,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191030914] [2020-10-16 11:37:51,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059638570] [2020-10-16 11:37:51,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:51,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:51,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:51,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:51,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:51,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:51,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:51,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922880954] [2020-10-16 11:37:51,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:51,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:51,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:51,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:51,800 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-16 11:37:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:52,039 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-16 11:37:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:52,040 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:52,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:52,042 INFO L225 Difference]: With dead ends: 187 [2020-10-16 11:37:52,042 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 11:37:52,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 11:37:52,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-16 11:37:52,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-16 11:37:52,047 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-16 11:37:52,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:52,047 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-16 11:37:52,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:52,047 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-16 11:37:52,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:52,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:52,047 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:52,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-16 11:37:52,248 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:52,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:52,249 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-16 11:37:52,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:52,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323912113] [2020-10-16 11:37:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:52,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323912113] [2020-10-16 11:37:52,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427290948] [2020-10-16 11:37:52,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:52,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:52,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:52,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:52,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:52,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:52,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:52,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203618104] [2020-10-16 11:37:52,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:52,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:52,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:52,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:52,487 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-16 11:37:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:52,741 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-16 11:37:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:52,742 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:52,743 INFO L225 Difference]: With dead ends: 198 [2020-10-16 11:37:52,743 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 11:37:52,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:52,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 11:37:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-16 11:37:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-16 11:37:52,747 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-16 11:37:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:52,747 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-16 11:37:52,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:52,747 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-16 11:37:52,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:52,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:52,748 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:52,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:52,949 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:52,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:52,949 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-16 11:37:52,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:52,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931688562] [2020-10-16 11:37:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:53,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931688562] [2020-10-16 11:37:53,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122780550] [2020-10-16 11:37:53,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:53,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:53,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:53,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:53,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:53,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:53,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:53,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770239493] [2020-10-16 11:37:53,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:53,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:53,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:53,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:53,209 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-16 11:37:53,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:53,478 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-16 11:37:53,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:53,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:53,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:53,480 INFO L225 Difference]: With dead ends: 189 [2020-10-16 11:37:53,480 INFO L226 Difference]: Without dead ends: 187 [2020-10-16 11:37:53,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:53,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-16 11:37:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-16 11:37:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:37:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-16 11:37:53,482 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-16 11:37:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:53,482 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-16 11:37:53,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:53,483 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-16 11:37:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:53,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:53,483 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:53,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-16 11:37:53,688 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:53,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:53,688 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-16 11:37:53,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:53,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573562729] [2020-10-16 11:37:53,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:53,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573562729] [2020-10-16 11:37:53,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497510717] [2020-10-16 11:37:53,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:53,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:53,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:53,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:53,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:53,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:53,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:53,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314936315] [2020-10-16 11:37:53,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:53,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:53,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:53,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:53,947 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-16 11:37:54,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:54,042 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-16 11:37:54,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:54,042 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:54,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:54,044 INFO L225 Difference]: With dead ends: 178 [2020-10-16 11:37:54,044 INFO L226 Difference]: Without dead ends: 176 [2020-10-16 11:37:54,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:54,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-16 11:37:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-16 11:37:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:37:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-16 11:37:54,047 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-16 11:37:54,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:54,047 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-16 11:37:54,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-16 11:37:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:54,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:54,048 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:54,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:54,249 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:54,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:54,249 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-16 11:37:54,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:54,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418966822] [2020-10-16 11:37:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:54,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418966822] [2020-10-16 11:37:54,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462854175] [2020-10-16 11:37:54,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:54,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:54,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:54,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:54,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:54,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:54,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:54,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476182750] [2020-10-16 11:37:54,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:54,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:54,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:54,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:54,505 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-16 11:37:54,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:54,697 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-16 11:37:54,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:54,697 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:54,699 INFO L225 Difference]: With dead ends: 193 [2020-10-16 11:37:54,699 INFO L226 Difference]: Without dead ends: 191 [2020-10-16 11:37:54,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:54,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-16 11:37:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-16 11:37:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:37:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-16 11:37:54,703 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-16 11:37:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:54,703 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-16 11:37:54,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-16 11:37:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:54,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:54,704 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:54,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-16 11:37:54,914 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:54,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:54,914 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-16 11:37:54,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:54,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488667359] [2020-10-16 11:37:54,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:54,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488667359] [2020-10-16 11:37:54,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595974728] [2020-10-16 11:37:54,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:55,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:55,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:55,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:55,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:55,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918457552] [2020-10-16 11:37:55,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:55,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:55,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:55,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:55,206 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-16 11:37:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:55,454 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-16 11:37:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:55,455 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:55,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:55,457 INFO L225 Difference]: With dead ends: 195 [2020-10-16 11:37:55,457 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 11:37:55,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:55,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 11:37:55,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-16 11:37:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:37:55,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-16 11:37:55,460 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-16 11:37:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:55,460 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-16 11:37:55,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-16 11:37:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:55,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:55,461 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:55,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:55,667 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:55,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:55,667 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-16 11:37:55,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:55,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753776665] [2020-10-16 11:37:55,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:55,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753776665] [2020-10-16 11:37:55,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933234253] [2020-10-16 11:37:55,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:55,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:55,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:55,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:55,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:55,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:55,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:55,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378539210] [2020-10-16 11:37:55,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:55,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:55,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:55,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:55,945 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-16 11:37:56,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:56,050 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-16 11:37:56,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:56,051 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:56,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:56,052 INFO L225 Difference]: With dead ends: 174 [2020-10-16 11:37:56,052 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 11:37:56,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:56,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 11:37:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-16 11:37:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:56,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-16 11:37:56,056 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-16 11:37:56,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:56,056 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-16 11:37:56,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:56,056 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-16 11:37:56,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:56,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:56,056 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:56,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-16 11:37:56,257 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:56,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:56,258 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-16 11:37:56,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:56,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769143095] [2020-10-16 11:37:56,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:56,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769143095] [2020-10-16 11:37:56,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919433142] [2020-10-16 11:37:56,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:56,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:56,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:56,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:56,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:56,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:56,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:56,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828238044] [2020-10-16 11:37:56,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:56,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:56,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:56,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:56,494 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-16 11:37:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:56,721 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-16 11:37:56,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:56,722 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:56,723 INFO L225 Difference]: With dead ends: 189 [2020-10-16 11:37:56,723 INFO L226 Difference]: Without dead ends: 187 [2020-10-16 11:37:56,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:56,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-16 11:37:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-16 11:37:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:37:56,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-16 11:37:56,727 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-16 11:37:56,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:56,727 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-16 11:37:56,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:56,728 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-16 11:37:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:56,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:56,728 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:56,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:56,932 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:56,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:56,932 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-16 11:37:56,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:56,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769294970] [2020-10-16 11:37:56,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:57,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769294970] [2020-10-16 11:37:57,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383358621] [2020-10-16 11:37:57,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:57,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:57,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:57,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:57,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:57,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:57,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:57,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395447375] [2020-10-16 11:37:57,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:57,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:57,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:57,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:57,171 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-16 11:37:57,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:57,302 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-16 11:37:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:57,303 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:57,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:57,304 INFO L225 Difference]: With dead ends: 175 [2020-10-16 11:37:57,304 INFO L226 Difference]: Without dead ends: 173 [2020-10-16 11:37:57,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:57,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-16 11:37:57,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-16 11:37:57,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:37:57,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:37:57,308 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:37:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:57,308 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:37:57,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:57,309 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:37:57,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:57,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:57,309 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:57,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:57,510 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:57,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:57,511 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-16 11:37:57,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:57,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104128077] [2020-10-16 11:37:57,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:57,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104128077] [2020-10-16 11:37:57,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420830926] [2020-10-16 11:37:57,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:57,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:57,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:57,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:57,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:57,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:57,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:57,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:57,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657315685] [2020-10-16 11:37:57,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:57,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:57,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:57,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:57,766 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:37:58,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:58,096 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-16 11:37:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:58,097 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:58,098 INFO L225 Difference]: With dead ends: 195 [2020-10-16 11:37:58,098 INFO L226 Difference]: Without dead ends: 190 [2020-10-16 11:37:58,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:37:58,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-16 11:37:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-16 11:37:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:37:58,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-16 11:37:58,102 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-16 11:37:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:58,102 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-16 11:37:58,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-16 11:37:58,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:58,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:58,103 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:58,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:58,303 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:58,304 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-16 11:37:58,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:58,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331484572] [2020-10-16 11:37:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:58,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331484572] [2020-10-16 11:37:58,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828852799] [2020-10-16 11:37:58,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:58,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:58,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:58,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:58,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:58,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:58,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:58,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666691959] [2020-10-16 11:37:58,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:58,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:58,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:58,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:58,535 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-16 11:37:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:58,784 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-16 11:37:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:58,784 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:58,786 INFO L225 Difference]: With dead ends: 187 [2020-10-16 11:37:58,786 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 11:37:58,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 11:37:58,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-16 11:37:58,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:37:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:37:58,790 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:37:58,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:58,790 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:37:58,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:37:58,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:58,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:58,790 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:58,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:58,991 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:58,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:58,992 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-16 11:37:58,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:58,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057543154] [2020-10-16 11:37:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:59,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057543154] [2020-10-16 11:37:59,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927446776] [2020-10-16 11:37:59,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:59,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:59,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:59,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:59,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:59,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:59,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183242779] [2020-10-16 11:37:59,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:59,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:59,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:59,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:59,259 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:37:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:59,693 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-16 11:37:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:59,694 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:59,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:59,695 INFO L225 Difference]: With dead ends: 212 [2020-10-16 11:37:59,695 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 11:37:59,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:37:59,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 11:37:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-16 11:37:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:37:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:37:59,699 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:37:59,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:59,699 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:37:59,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:37:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:59,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:59,700 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:59,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-16 11:37:59,901 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:59,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:59,901 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-16 11:37:59,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:59,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822323660] [2020-10-16 11:37:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:59,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822323660] [2020-10-16 11:37:59,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919704835] [2020-10-16 11:37:59,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:00,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:38:00,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:00,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:00,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:00,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:38:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:00,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:00,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:00,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173219239] [2020-10-16 11:38:00,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:00,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:00,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:00,190 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:38:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:00,577 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-16 11:38:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:38:00,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:00,579 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:38:00,579 INFO L226 Difference]: Without dead ends: 197 [2020-10-16 11:38:00,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:38:00,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-16 11:38:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-16 11:38:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:38:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-16 11:38:00,583 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-16 11:38:00,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:00,583 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-16 11:38:00,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:00,584 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-16 11:38:00,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:00,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:00,584 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:00,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:00,795 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:00,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:00,795 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-16 11:38:00,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:00,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239640196] [2020-10-16 11:38:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:00,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239640196] [2020-10-16 11:38:00,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983268018] [2020-10-16 11:38:00,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:00,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:38:00,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:00,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:00,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:01,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:01,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:01,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605220652] [2020-10-16 11:38:01,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:01,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:01,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:01,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:01,548 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-16 11:38:01,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:01,832 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-16 11:38:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:38:01,833 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:01,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:01,835 INFO L225 Difference]: With dead ends: 198 [2020-10-16 11:38:01,835 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 11:38:01,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:38:01,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 11:38:01,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-16 11:38:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:38:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-16 11:38:01,839 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-16 11:38:01,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:01,839 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-16 11:38:01,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:01,840 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-16 11:38:01,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:01,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:01,840 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:02,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-16 11:38:02,048 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:02,048 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-16 11:38:02,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:02,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911976905] [2020-10-16 11:38:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:02,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911976905] [2020-10-16 11:38:02,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086738807] [2020-10-16 11:38:02,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:02,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:38:02,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:02,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:02,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:02,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:02,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:02,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445330435] [2020-10-16 11:38:02,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:02,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:02,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:02,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:02,320 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-16 11:38:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:02,726 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-16 11:38:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:38:02,726 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:02,728 INFO L225 Difference]: With dead ends: 209 [2020-10-16 11:38:02,728 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 11:38:02,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:38:02,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 11:38:02,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-16 11:38:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:38:02,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:38:02,731 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:38:02,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:02,731 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:38:02,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:02,731 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:38:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:02,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:02,732 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:02,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 11:38:02,933 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:02,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:02,933 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-16 11:38:02,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:02,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752363776] [2020-10-16 11:38:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:03,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752363776] [2020-10-16 11:38:03,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311329744] [2020-10-16 11:38:03,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:03,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:38:03,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:03,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:03,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:03,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:38:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:03,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:03,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:03,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74005515] [2020-10-16 11:38:03,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:03,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:03,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:03,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:03,187 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:38:03,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:03,723 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-16 11:38:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:38:03,724 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:03,725 INFO L225 Difference]: With dead ends: 217 [2020-10-16 11:38:03,726 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 11:38:03,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:38:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 11:38:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-16 11:38:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-16 11:38:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-16 11:38:03,730 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-16 11:38:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:03,731 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-16 11:38:03,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:03,731 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-16 11:38:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:03,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:03,732 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:03,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-16 11:38:03,938 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:03,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:03,938 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-16 11:38:03,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:03,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914232697] [2020-10-16 11:38:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:04,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914232697] [2020-10-16 11:38:04,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453705109] [2020-10-16 11:38:04,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:04,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:38:04,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:04,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:04,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:06,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:38:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:06,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:06,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:06,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710974580] [2020-10-16 11:38:06,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:06,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:06,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:06,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-16 11:38:06,257 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-16 11:38:10,576 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-16 11:38:14,792 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-16 11:38:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:15,276 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-16 11:38:15,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:38:15,277 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:15,278 INFO L225 Difference]: With dead ends: 236 [2020-10-16 11:38:15,278 INFO L226 Difference]: Without dead ends: 228 [2020-10-16 11:38:15,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-16 11:38:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-16 11:38:15,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-16 11:38:15,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:38:15,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-16 11:38:15,282 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-16 11:38:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:15,282 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-16 11:38:15,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:15,282 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-16 11:38:15,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:15,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:15,283 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:15,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 11:38:15,484 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:15,484 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-16 11:38:15,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:15,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245939922] [2020-10-16 11:38:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:15,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245939922] [2020-10-16 11:38:15,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730940384] [2020-10-16 11:38:15,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:15,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:15,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:15,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:38:15,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:38:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:16,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:16,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 11:38:16,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898877050] [2020-10-16 11:38:16,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:38:16,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:16,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:38:16,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=169, Unknown=1, NotChecked=0, Total=240 [2020-10-16 11:38:16,914 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 16 states. [2020-10-16 11:38:18,556 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-16 11:38:24,419 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-16 11:38:27,061 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-16 11:38:59,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:59,754 INFO L93 Difference]: Finished difference Result 230 states and 544 transitions. [2020-10-16 11:38:59,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:38:59,758 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-16 11:38:59,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:59,759 INFO L225 Difference]: With dead ends: 230 [2020-10-16 11:38:59,759 INFO L226 Difference]: Without dead ends: 225 [2020-10-16 11:38:59,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=298, Invalid=687, Unknown=7, NotChecked=0, Total=992 [2020-10-16 11:38:59,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-16 11:38:59,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 140. [2020-10-16 11:38:59,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:38:59,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-16 11:38:59,762 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-16 11:38:59,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:59,762 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-16 11:38:59,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:38:59,763 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-16 11:38:59,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:59,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:59,763 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:59,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:59,965 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:59,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:59,966 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-16 11:38:59,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:59,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833671683] [2020-10-16 11:38:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:00,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833671683] [2020-10-16 11:39:00,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657854928] [2020-10-16 11:39:00,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:00,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:00,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:00,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:00,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:00,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:00,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963571427] [2020-10-16 11:39:00,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:00,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:00,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:00,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:00,235 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-16 11:39:00,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:00,517 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-16 11:39:00,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:39:00,517 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:00,518 INFO L225 Difference]: With dead ends: 197 [2020-10-16 11:39:00,518 INFO L226 Difference]: Without dead ends: 195 [2020-10-16 11:39:00,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:39:00,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-16 11:39:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-16 11:39:00,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:39:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-16 11:39:00,522 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-16 11:39:00,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:00,522 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-16 11:39:00,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:00,522 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-16 11:39:00,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:00,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:00,523 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:00,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:00,728 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:00,728 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-16 11:39:00,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:00,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971772508] [2020-10-16 11:39:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:00,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971772508] [2020-10-16 11:39:00,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748008469] [2020-10-16 11:39:00,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:00,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:39:00,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:00,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:00,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:00,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:00,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:00,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379623334] [2020-10-16 11:39:00,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:00,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:00,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:00,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:00,973 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-16 11:39:01,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:01,251 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-16 11:39:01,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:39:01,251 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:01,252 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:39:01,252 INFO L226 Difference]: Without dead ends: 200 [2020-10-16 11:39:01,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:39:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-16 11:39:01,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-16 11:39:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:39:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-16 11:39:01,255 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-16 11:39:01,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:01,256 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-16 11:39:01,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:01,256 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-16 11:39:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:01,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:01,256 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:01,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-16 11:39:01,457 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:01,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-16 11:39:01,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:01,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393980173] [2020-10-16 11:39:01,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:01,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393980173] [2020-10-16 11:39:01,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136553984] [2020-10-16 11:39:01,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:01,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:39:01,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:01,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:01,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:01,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:01,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:01,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379785402] [2020-10-16 11:39:01,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:01,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:01,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:01,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:01,718 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-16 11:39:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:02,024 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-16 11:39:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:39:02,025 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:02,025 INFO L225 Difference]: With dead ends: 197 [2020-10-16 11:39:02,025 INFO L226 Difference]: Without dead ends: 195 [2020-10-16 11:39:02,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:39:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-16 11:39:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-16 11:39:02,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:39:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-16 11:39:02,029 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-16 11:39:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:02,029 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-16 11:39:02,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-16 11:39:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:02,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:02,030 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:02,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 11:39:02,231 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:02,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:02,231 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-16 11:39:02,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:02,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411229353] [2020-10-16 11:39:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:02,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411229353] [2020-10-16 11:39:02,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836451886] [2020-10-16 11:39:02,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:02,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:02,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:02,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:02,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:02,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:02,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:02,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272850515] [2020-10-16 11:39:02,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:02,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:02,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:02,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:02,546 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-16 11:39:03,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:03,166 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-16 11:39:03,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:39:03,167 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:03,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:03,169 INFO L225 Difference]: With dead ends: 214 [2020-10-16 11:39:03,169 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 11:39:03,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:39:03,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 11:39:03,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-16 11:39:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:39:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-16 11:39:03,175 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-16 11:39:03,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:03,175 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-16 11:39:03,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:03,175 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-16 11:39:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:03,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:03,176 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:03,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-16 11:39:03,377 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:03,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:03,378 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-16 11:39:03,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:03,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530770179] [2020-10-16 11:39:03,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:03,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530770179] [2020-10-16 11:39:03,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305606147] [2020-10-16 11:39:03,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:03,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:39:03,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:03,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:03,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:03,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:03,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:03,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008463650] [2020-10-16 11:39:03,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:03,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:03,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:03,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:03,747 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-16 11:39:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:04,214 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-16 11:39:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:39:04,215 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:04,216 INFO L225 Difference]: With dead ends: 217 [2020-10-16 11:39:04,216 INFO L226 Difference]: Without dead ends: 215 [2020-10-16 11:39:04,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:39:04,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-16 11:39:04,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-16 11:39:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:39:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-16 11:39:04,219 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-16 11:39:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:04,220 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-16 11:39:04,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-16 11:39:04,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:04,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:04,220 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:04,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:04,429 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:04,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:04,430 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-16 11:39:04,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:04,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410903477] [2020-10-16 11:39:04,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:04,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410903477] [2020-10-16 11:39:04,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091219833] [2020-10-16 11:39:04,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:04,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:04,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:04,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:04,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:04,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487485752] [2020-10-16 11:39:04,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:04,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:04,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:04,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:04,676 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-16 11:39:05,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:05,088 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-16 11:39:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:39:05,089 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:05,089 INFO L225 Difference]: With dead ends: 211 [2020-10-16 11:39:05,089 INFO L226 Difference]: Without dead ends: 209 [2020-10-16 11:39:05,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:39:05,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-16 11:39:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-16 11:39:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 11:39:05,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 11:39:05,093 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 11:39:05,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:05,093 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 11:39:05,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:05,094 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 11:39:05,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:05,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:05,094 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:05,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:05,295 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:05,295 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-16 11:39:05,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:05,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758827724] [2020-10-16 11:39:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:05,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758827724] [2020-10-16 11:39:05,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474972129] [2020-10-16 11:39:05,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:05,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:05,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:05,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:05,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:05,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:39:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:05,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:05,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:05,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534960724] [2020-10-16 11:39:05,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:05,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:05,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:05,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:05,552 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 11:39:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:06,056 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-16 11:39:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:39:06,056 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:06,057 INFO L225 Difference]: With dead ends: 211 [2020-10-16 11:39:06,057 INFO L226 Difference]: Without dead ends: 206 [2020-10-16 11:39:06,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:39:06,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-16 11:39:06,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-16 11:39:06,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 11:39:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 11:39:06,060 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 11:39:06,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:06,060 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 11:39:06,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:06,061 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 11:39:06,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:06,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:06,061 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:06,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 11:39:06,262 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:06,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:06,262 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-16 11:39:06,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:06,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530348709] [2020-10-16 11:39:06,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:06,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530348709] [2020-10-16 11:39:06,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010890875] [2020-10-16 11:39:06,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:06,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:39:06,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:06,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:06,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:06,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:39:06,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:06,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:06,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:06,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378514210] [2020-10-16 11:39:06,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:06,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:06,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:06,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:06,539 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 11:39:07,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:07,165 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-16 11:39:07,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:39:07,165 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:07,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:07,166 INFO L225 Difference]: With dead ends: 227 [2020-10-16 11:39:07,166 INFO L226 Difference]: Without dead ends: 222 [2020-10-16 11:39:07,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:39:07,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-16 11:39:07,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-16 11:39:07,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:39:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-16 11:39:07,170 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-16 11:39:07,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:07,170 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-16 11:39:07,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:07,170 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-16 11:39:07,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:07,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:07,171 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:07,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-16 11:39:07,375 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:07,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:07,375 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-16 11:39:07,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:07,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834106632] [2020-10-16 11:39:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:07,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834106632] [2020-10-16 11:39:07,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323664719] [2020-10-16 11:39:07,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:07,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:39:07,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:07,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:07,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:07,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:07,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:07,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678598765] [2020-10-16 11:39:07,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:07,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:07,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:07,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:07,614 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-16 11:39:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:08,095 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-16 11:39:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:39:08,095 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:08,096 INFO L225 Difference]: With dead ends: 221 [2020-10-16 11:39:08,096 INFO L226 Difference]: Without dead ends: 219 [2020-10-16 11:39:08,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:39:08,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-16 11:39:08,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-16 11:39:08,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 11:39:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 11:39:08,100 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 11:39:08,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:08,100 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 11:39:08,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 11:39:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:08,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:08,101 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:08,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:08,302 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:08,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:08,302 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-16 11:39:08,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:08,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671741046] [2020-10-16 11:39:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:08,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671741046] [2020-10-16 11:39:08,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664029120] [2020-10-16 11:39:08,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:08,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:39:08,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:08,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:08,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:08,535 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:39:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:08,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:08,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:08,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177807705] [2020-10-16 11:39:08,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:08,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:08,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:08,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:08,546 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 11:39:09,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:09,124 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-16 11:39:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:39:09,125 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:09,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:09,126 INFO L225 Difference]: With dead ends: 240 [2020-10-16 11:39:09,126 INFO L226 Difference]: Without dead ends: 232 [2020-10-16 11:39:09,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:39:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-16 11:39:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-16 11:39:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-16 11:39:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-16 11:39:09,130 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-16 11:39:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:09,130 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-16 11:39:09,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-16 11:39:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:09,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:09,131 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:09,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 11:39:09,342 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:09,342 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-16 11:39:09,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:09,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611733065] [2020-10-16 11:39:09,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:09,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611733065] [2020-10-16 11:39:09,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616867049] [2020-10-16 11:39:09,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:09,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:39:09,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:09,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:09,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:09,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:39:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:09,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:09,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:09,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051472022] [2020-10-16 11:39:09,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:09,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:09,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:09,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:09,631 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-16 11:39:10,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:10,299 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-16 11:39:10,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:39:10,300 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:10,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:10,301 INFO L225 Difference]: With dead ends: 238 [2020-10-16 11:39:10,301 INFO L226 Difference]: Without dead ends: 230 [2020-10-16 11:39:10,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:39:10,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-16 11:39:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-16 11:39:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:39:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-16 11:39:10,304 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-16 11:39:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:10,305 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-16 11:39:10,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-16 11:39:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:10,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:10,305 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:10,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:10,514 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:10,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:10,514 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-16 11:39:10,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:10,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612876697] [2020-10-16 11:39:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:10,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612876697] [2020-10-16 11:39:10,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706849931] [2020-10-16 11:39:10,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:10,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:10,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:10,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:10,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:10,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010412855] [2020-10-16 11:39:10,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:10,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:10,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:10,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:10,759 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-16 11:39:11,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:11,028 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-16 11:39:11,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:39:11,028 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:11,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:11,029 INFO L225 Difference]: With dead ends: 195 [2020-10-16 11:39:11,029 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 11:39:11,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:39:11,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 11:39:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-16 11:39:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:39:11,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-16 11:39:11,033 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-16 11:39:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:11,033 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-16 11:39:11,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-16 11:39:11,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:11,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:11,034 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:11,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-16 11:39:11,241 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:11,241 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-16 11:39:11,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:11,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837180855] [2020-10-16 11:39:11,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:11,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837180855] [2020-10-16 11:39:11,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095134934] [2020-10-16 11:39:11,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:11,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:11,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:11,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:11,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:11,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:11,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:11,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91257547] [2020-10-16 11:39:11,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:11,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:11,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:11,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:11,492 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-16 11:39:11,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:11,965 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-16 11:39:11,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:39:11,966 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:11,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:11,967 INFO L225 Difference]: With dead ends: 206 [2020-10-16 11:39:11,967 INFO L226 Difference]: Without dead ends: 204 [2020-10-16 11:39:11,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:39:11,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-16 11:39:11,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-16 11:39:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:39:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-16 11:39:11,970 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-16 11:39:11,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:11,970 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-16 11:39:11,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:11,970 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-16 11:39:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:11,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:11,971 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:12,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:12,172 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:12,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:12,172 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-16 11:39:12,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:12,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850397050] [2020-10-16 11:39:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:12,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850397050] [2020-10-16 11:39:12,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570990528] [2020-10-16 11:39:12,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:12,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:39:12,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:12,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:12,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:12,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:39:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:13,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:13,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 11:39:13,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482362413] [2020-10-16 11:39:13,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:39:13,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:13,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:39:13,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-16 11:39:13,878 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-16 11:39:16,336 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-16 11:39:36,429 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-16 11:40:05,231 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-16 11:40:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:20,443 INFO L93 Difference]: Finished difference Result 239 states and 570 transitions. [2020-10-16 11:40:20,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:40:20,447 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-16 11:40:20,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:20,448 INFO L225 Difference]: With dead ends: 239 [2020-10-16 11:40:20,448 INFO L226 Difference]: Without dead ends: 234 [2020-10-16 11:40:20,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-16 11:40:20,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-16 11:40:20,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 139. [2020-10-16 11:40:20,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:40:20,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-16 11:40:20,452 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-16 11:40:20,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:20,452 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-16 11:40:20,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:40:20,452 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-16 11:40:20,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:20,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:20,453 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:20,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-16 11:40:20,662 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:20,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:20,662 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-16 11:40:20,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:20,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602627924] [2020-10-16 11:40:20,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:20,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602627924] [2020-10-16 11:40:20,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544491150] [2020-10-16 11:40:20,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:20,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:20,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:20,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:20,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:20,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:20,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:20,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197168890] [2020-10-16 11:40:20,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:20,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:20,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:20,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:20,926 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-16 11:40:21,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:21,143 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-16 11:40:21,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:40:21,145 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:21,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:21,145 INFO L225 Difference]: With dead ends: 194 [2020-10-16 11:40:21,146 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 11:40:21,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:40:21,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 11:40:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-16 11:40:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:40:21,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-16 11:40:21,149 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-16 11:40:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:21,149 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-16 11:40:21,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-16 11:40:21,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:21,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:21,150 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:21,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:21,351 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:21,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:21,351 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-16 11:40:21,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:21,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802803248] [2020-10-16 11:40:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:21,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802803248] [2020-10-16 11:40:21,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593822645] [2020-10-16 11:40:21,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:21,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:21,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:21,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:21,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:21,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:21,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:21,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191614812] [2020-10-16 11:40:21,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:21,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:21,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:21,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:21,627 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-16 11:40:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:21,953 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-16 11:40:21,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:40:21,953 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:21,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:21,954 INFO L225 Difference]: With dead ends: 205 [2020-10-16 11:40:21,955 INFO L226 Difference]: Without dead ends: 203 [2020-10-16 11:40:21,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:40:21,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-16 11:40:21,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-16 11:40:21,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:40:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-16 11:40:21,960 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-16 11:40:21,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:21,960 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-16 11:40:21,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:21,961 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-16 11:40:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:21,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:21,961 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:22,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:22,162 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:22,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:22,163 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-16 11:40:22,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:22,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140084696] [2020-10-16 11:40:22,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:22,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140084696] [2020-10-16 11:40:22,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527300155] [2020-10-16 11:40:22,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:22,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:40:22,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:22,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:22,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:22,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:22,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:22,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136180023] [2020-10-16 11:40:22,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:22,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:22,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:22,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:22,432 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-16 11:40:22,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:22,734 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-16 11:40:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:40:22,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:22,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:22,736 INFO L225 Difference]: With dead ends: 201 [2020-10-16 11:40:22,736 INFO L226 Difference]: Without dead ends: 199 [2020-10-16 11:40:22,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:40:22,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-16 11:40:22,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-16 11:40:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 11:40:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-16 11:40:22,739 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-16 11:40:22,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:22,739 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-16 11:40:22,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-16 11:40:22,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:22,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:22,740 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:22,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:22,941 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:22,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-16 11:40:22,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:22,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77038961] [2020-10-16 11:40:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:23,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77038961] [2020-10-16 11:40:23,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635715983] [2020-10-16 11:40:23,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:23,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:23,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:23,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:23,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:23,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441469845] [2020-10-16 11:40:23,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:23,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:23,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:23,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:23,212 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-16 11:40:23,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:23,476 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-16 11:40:23,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:40:23,476 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:23,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:23,477 INFO L225 Difference]: With dead ends: 194 [2020-10-16 11:40:23,477 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 11:40:23,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:40:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 11:40:23,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-16 11:40:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:40:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-16 11:40:23,480 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-16 11:40:23,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:23,481 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-16 11:40:23,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:23,481 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-16 11:40:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:23,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:23,481 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:23,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-16 11:40:23,682 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:23,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:23,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-16 11:40:23,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:23,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137032552] [2020-10-16 11:40:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:23,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137032552] [2020-10-16 11:40:23,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903197920] [2020-10-16 11:40:23,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:23,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:23,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:23,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:23,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:23,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:23,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:23,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282404200] [2020-10-16 11:40:23,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:23,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:23,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:23,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:23,963 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-16 11:40:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:24,329 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-16 11:40:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:40:24,329 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:24,330 INFO L225 Difference]: With dead ends: 209 [2020-10-16 11:40:24,330 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 11:40:24,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:40:24,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 11:40:24,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-16 11:40:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:40:24,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-16 11:40:24,335 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-16 11:40:24,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:24,335 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-16 11:40:24,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:24,336 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-16 11:40:24,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:24,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:24,336 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:24,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:24,545 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:24,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-16 11:40:24,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:24,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766510604] [2020-10-16 11:40:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:24,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766510604] [2020-10-16 11:40:24,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9427819] [2020-10-16 11:40:24,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:24,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:40:24,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:24,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:24,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:24,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:24,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:24,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632568544] [2020-10-16 11:40:24,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:24,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:24,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:24,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:24,805 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-16 11:40:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:25,149 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-16 11:40:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:40:25,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:25,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:25,150 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:40:25,150 INFO L226 Difference]: Without dead ends: 200 [2020-10-16 11:40:25,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-16 11:40:25,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-16 11:40:25,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:40:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-16 11:40:25,154 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-16 11:40:25,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:25,154 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-16 11:40:25,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-16 11:40:25,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:25,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:25,154 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:25,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 11:40:25,355 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:25,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:25,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-16 11:40:25,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:25,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379004457] [2020-10-16 11:40:25,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:25,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379004457] [2020-10-16 11:40:25,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55852500] [2020-10-16 11:40:25,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:25,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:25,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:25,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:25,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:25,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:25,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249505737] [2020-10-16 11:40:25,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:25,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:25,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:25,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:25,622 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-16 11:40:25,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:25,942 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-16 11:40:25,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:40:25,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:25,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:25,943 INFO L225 Difference]: With dead ends: 201 [2020-10-16 11:40:25,944 INFO L226 Difference]: Without dead ends: 199 [2020-10-16 11:40:25,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:25,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-16 11:40:25,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-16 11:40:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:40:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-16 11:40:25,946 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-16 11:40:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:25,947 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-16 11:40:25,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:25,947 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-16 11:40:25,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:25,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:25,947 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:26,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 11:40:26,148 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:26,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:26,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-16 11:40:26,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:26,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949734732] [2020-10-16 11:40:26,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:26,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949734732] [2020-10-16 11:40:26,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312591107] [2020-10-16 11:40:26,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:26,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:26,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:26,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:26,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:26,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:26,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:26,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860001698] [2020-10-16 11:40:26,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:26,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:26,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:26,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:26,410 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-16 11:40:26,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:26,861 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-16 11:40:26,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:40:26,861 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:26,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:26,862 INFO L225 Difference]: With dead ends: 215 [2020-10-16 11:40:26,862 INFO L226 Difference]: Without dead ends: 213 [2020-10-16 11:40:26,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:40:26,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-16 11:40:26,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-16 11:40:26,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:40:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-16 11:40:26,866 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-16 11:40:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:26,866 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-16 11:40:26,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-16 11:40:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:26,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:26,867 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:27,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:27,076 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:27,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:27,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-16 11:40:27,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:27,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892003531] [2020-10-16 11:40:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:27,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892003531] [2020-10-16 11:40:27,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391679764] [2020-10-16 11:40:27,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:27,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:40:27,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:27,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:27,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:27,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:27,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:27,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885084485] [2020-10-16 11:40:27,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:27,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:27,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:27,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:27,330 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-16 11:40:27,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:27,715 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-16 11:40:27,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:40:27,715 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:27,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:27,716 INFO L225 Difference]: With dead ends: 196 [2020-10-16 11:40:27,716 INFO L226 Difference]: Without dead ends: 194 [2020-10-16 11:40:27,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:40:27,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-16 11:40:27,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-16 11:40:27,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:40:27,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 11:40:27,720 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 11:40:27,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:27,721 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 11:40:27,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:27,721 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 11:40:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:27,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:27,722 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:27,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:27,924 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:27,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-16 11:40:27,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:27,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254173722] [2020-10-16 11:40:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:28,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254173722] [2020-10-16 11:40:28,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533187439] [2020-10-16 11:40:28,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:28,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:28,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:28,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:28,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:28,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:28,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462758052] [2020-10-16 11:40:28,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:28,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:28,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:28,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:28,157 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 11:40:28,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:28,459 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-16 11:40:28,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:40:28,460 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:28,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:28,460 INFO L225 Difference]: With dead ends: 191 [2020-10-16 11:40:28,460 INFO L226 Difference]: Without dead ends: 186 [2020-10-16 11:40:28,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:28,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-16 11:40:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-16 11:40:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:40:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 11:40:28,464 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 11:40:28,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:28,464 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 11:40:28,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 11:40:28,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:28,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:28,465 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:28,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-16 11:40:28,665 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:28,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:28,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-16 11:40:28,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:28,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036293323] [2020-10-16 11:40:28,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:28,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036293323] [2020-10-16 11:40:28,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229012493] [2020-10-16 11:40:28,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:28,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:28,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:28,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:28,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:28,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:40:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:28,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:28,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:28,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135396017] [2020-10-16 11:40:28,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:28,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:28,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:28,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:28,952 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 11:40:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:29,516 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-16 11:40:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:40:29,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:29,517 INFO L225 Difference]: With dead ends: 232 [2020-10-16 11:40:29,517 INFO L226 Difference]: Without dead ends: 227 [2020-10-16 11:40:29,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:40:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-16 11:40:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-16 11:40:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:40:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-16 11:40:29,521 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-16 11:40:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:29,521 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-16 11:40:29,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:29,521 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-16 11:40:29,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:29,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:29,522 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:29,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:29,723 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:29,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:29,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-16 11:40:29,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:29,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284569961] [2020-10-16 11:40:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:29,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284569961] [2020-10-16 11:40:29,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774112840] [2020-10-16 11:40:29,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:29,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:40:29,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:29,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:29,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:29,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:29,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:29,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417475948] [2020-10-16 11:40:29,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:29,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:29,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:29,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:29,989 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-16 11:40:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:30,547 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-16 11:40:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:40:30,548 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:30,548 INFO L225 Difference]: With dead ends: 222 [2020-10-16 11:40:30,548 INFO L226 Difference]: Without dead ends: 220 [2020-10-16 11:40:30,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:40:30,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-16 11:40:30,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-16 11:40:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:40:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 11:40:30,552 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 11:40:30,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:30,552 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 11:40:30,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 11:40:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:30,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:30,553 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:30,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:30,754 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:30,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-16 11:40:30,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:30,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845529917] [2020-10-16 11:40:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:30,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845529917] [2020-10-16 11:40:30,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397018668] [2020-10-16 11:40:30,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:30,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:30,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:30,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:30,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:30,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:31,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:31,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:31,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549745260] [2020-10-16 11:40:31,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:31,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:31,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:31,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:31,033 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 11:40:31,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:31,811 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-16 11:40:31,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:40:31,811 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:31,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:31,812 INFO L225 Difference]: With dead ends: 254 [2020-10-16 11:40:31,812 INFO L226 Difference]: Without dead ends: 246 [2020-10-16 11:40:31,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:40:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-16 11:40:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-16 11:40:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-16 11:40:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-16 11:40:31,817 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-16 11:40:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:31,817 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-16 11:40:31,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-16 11:40:31,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:31,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:31,818 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:32,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:32,026 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:32,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-16 11:40:32,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:32,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252738205] [2020-10-16 11:40:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:32,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252738205] [2020-10-16 11:40:32,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875025295] [2020-10-16 11:40:32,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:32,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:32,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:32,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:32,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:32,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:40:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:32,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:32,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:32,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966865179] [2020-10-16 11:40:32,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:32,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:32,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:32,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:32,302 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-16 11:40:33,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:33,078 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-16 11:40:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:40:33,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:33,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:33,080 INFO L225 Difference]: With dead ends: 246 [2020-10-16 11:40:33,080 INFO L226 Difference]: Without dead ends: 238 [2020-10-16 11:40:33,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:40:33,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-16 11:40:33,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-16 11:40:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:40:33,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-16 11:40:33,084 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-16 11:40:33,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:33,084 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-16 11:40:33,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:33,084 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-16 11:40:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:33,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:33,085 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:33,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-16 11:40:33,294 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:33,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:33,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-16 11:40:33,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:33,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146417832] [2020-10-16 11:40:33,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:33,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146417832] [2020-10-16 11:40:33,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570612463] [2020-10-16 11:40:33,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:33,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:40:33,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:33,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:33,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:33,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:33,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:33,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532190088] [2020-10-16 11:40:33,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:33,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:33,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:33,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:33,576 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-16 11:40:33,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:33,983 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-16 11:40:33,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:40:33,983 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:33,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:33,984 INFO L225 Difference]: With dead ends: 208 [2020-10-16 11:40:33,984 INFO L226 Difference]: Without dead ends: 206 [2020-10-16 11:40:33,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:40:33,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-16 11:40:33,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-16 11:40:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:40:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-16 11:40:33,988 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-16 11:40:33,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:33,988 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-16 11:40:33,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:33,988 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-16 11:40:33,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:33,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:33,988 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:34,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 11:40:34,189 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:34,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:34,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-16 11:40:34,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:34,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83701873] [2020-10-16 11:40:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:34,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83701873] [2020-10-16 11:40:34,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482841253] [2020-10-16 11:40:34,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:34,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:34,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:34,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:34,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:34,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987334062] [2020-10-16 11:40:34,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:34,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:34,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:34,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:34,453 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-16 11:40:34,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:34,986 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-16 11:40:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:40:34,986 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:34,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:34,987 INFO L225 Difference]: With dead ends: 215 [2020-10-16 11:40:34,987 INFO L226 Difference]: Without dead ends: 213 [2020-10-16 11:40:34,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:40:34,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-16 11:40:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-16 11:40:34,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 11:40:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-16 11:40:34,991 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-16 11:40:34,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:34,991 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-16 11:40:34,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:34,991 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-16 11:40:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:34,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:34,991 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:35,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-16 11:40:35,192 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:35,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:35,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-16 11:40:35,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:35,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811752689] [2020-10-16 11:40:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:35,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811752689] [2020-10-16 11:40:35,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550753579] [2020-10-16 11:40:35,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:35,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:35,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:35,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:35,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:35,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:35,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:35,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:35,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781245140] [2020-10-16 11:40:35,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:35,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:35,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:35,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:35,437 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-16 11:40:36,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:36,036 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-16 11:40:36,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:40:36,036 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:36,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:36,037 INFO L225 Difference]: With dead ends: 236 [2020-10-16 11:40:36,037 INFO L226 Difference]: Without dead ends: 228 [2020-10-16 11:40:36,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:40:36,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-16 11:40:36,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-16 11:40:36,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 11:40:36,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-16 11:40:36,040 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-16 11:40:36,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:36,040 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-16 11:40:36,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:36,040 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-16 11:40:36,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:36,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:36,040 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:36,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 11:40:36,241 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:36,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:36,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-16 11:40:36,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:36,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824083028] [2020-10-16 11:40:36,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:36,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824083028] [2020-10-16 11:40:36,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674475833] [2020-10-16 11:40:36,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:36,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:40:36,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:36,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:36,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:36,468 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:40:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:36,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:36,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:36,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610934778] [2020-10-16 11:40:36,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:36,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:36,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:36,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:36,481 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-16 11:40:37,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:37,159 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-16 11:40:37,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:40:37,160 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:37,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:37,162 INFO L225 Difference]: With dead ends: 241 [2020-10-16 11:40:37,162 INFO L226 Difference]: Without dead ends: 233 [2020-10-16 11:40:37,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:40:37,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-16 11:40:37,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-16 11:40:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-16 11:40:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-16 11:40:37,166 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-16 11:40:37,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:37,166 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-16 11:40:37,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-16 11:40:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:37,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:37,167 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:37,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 11:40:37,378 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:37,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:37,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-16 11:40:37,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:37,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071516816] [2020-10-16 11:40:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:37,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071516816] [2020-10-16 11:40:37,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786907068] [2020-10-16 11:40:37,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:37,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:37,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:37,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:37,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:37,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:37,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:37,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:37,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030051700] [2020-10-16 11:40:37,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:37,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:37,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:37,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:37,653 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-16 11:40:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:38,270 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-16 11:40:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:40:38,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:38,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:38,272 INFO L225 Difference]: With dead ends: 232 [2020-10-16 11:40:38,272 INFO L226 Difference]: Without dead ends: 224 [2020-10-16 11:40:38,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:40:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-16 11:40:38,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-16 11:40:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-16 11:40:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-16 11:40:38,277 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-16 11:40:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:38,277 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-16 11:40:38,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-16 11:40:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:38,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:38,278 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:38,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:38,489 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:38,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:38,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-16 11:40:38,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:38,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353303507] [2020-10-16 11:40:38,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:38,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353303507] [2020-10-16 11:40:38,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870102016] [2020-10-16 11:40:38,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:38,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:40:38,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:38,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:40:38,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:38,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 11:40:38,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-10-16 11:40:38,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593976466] [2020-10-16 11:40:38,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:40:38,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:38,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:40:38,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:40:38,748 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 8 states. [2020-10-16 11:40:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:38,780 INFO L93 Difference]: Finished difference Result 195 states and 513 transitions. [2020-10-16 11:40:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:40:38,781 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-16 11:40:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:38,782 INFO L225 Difference]: With dead ends: 195 [2020-10-16 11:40:38,782 INFO L226 Difference]: Without dead ends: 188 [2020-10-16 11:40:38,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:40:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-16 11:40:38,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-10-16 11:40:38,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-16 11:40:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 500 transitions. [2020-10-16 11:40:38,786 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 500 transitions. Word has length 13 [2020-10-16 11:40:38,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:38,786 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 500 transitions. [2020-10-16 11:40:38,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:40:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 500 transitions. [2020-10-16 11:40:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:38,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:38,787 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:38,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-16 11:40:38,996 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:38,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:38,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-16 11:40:38,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:38,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628747984] [2020-10-16 11:40:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:39,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628747984] [2020-10-16 11:40:39,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754732551] [2020-10-16 11:40:39,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:39,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:40:39,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:39,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:39,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:39,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:39,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:39,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320211525] [2020-10-16 11:40:39,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:39,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:39,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:39,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:39,524 INFO L87 Difference]: Start difference. First operand 188 states and 500 transitions. Second operand 17 states. [2020-10-16 11:40:39,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:39,596 INFO L93 Difference]: Finished difference Result 249 states and 638 transitions. [2020-10-16 11:40:39,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:40:39,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:40:39,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:39,598 INFO L225 Difference]: With dead ends: 249 [2020-10-16 11:40:39,598 INFO L226 Difference]: Without dead ends: 241 [2020-10-16 11:40:39,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:39,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-16 11:40:39,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 197. [2020-10-16 11:40:39,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-16 11:40:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 521 transitions. [2020-10-16 11:40:39,602 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 521 transitions. Word has length 13 [2020-10-16 11:40:39,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:39,603 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 521 transitions. [2020-10-16 11:40:39,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:39,603 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 521 transitions. [2020-10-16 11:40:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:39,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:39,603 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:39,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 11:40:39,814 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:39,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:39,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-16 11:40:39,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:39,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858501353] [2020-10-16 11:40:39,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:40,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858501353] [2020-10-16 11:40:40,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254107388] [2020-10-16 11:40:40,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:40,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:40,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:40,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:40:40,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:40,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 11:40:40,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-10-16 11:40:40,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104652003] [2020-10-16 11:40:40,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:40:40,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:40,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:40:40,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:40:40,148 INFO L87 Difference]: Start difference. First operand 197 states and 521 transitions. Second operand 8 states. [2020-10-16 11:40:40,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:40,176 INFO L93 Difference]: Finished difference Result 278 states and 705 transitions. [2020-10-16 11:40:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:40:40,177 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-16 11:40:40,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:40,177 INFO L225 Difference]: With dead ends: 278 [2020-10-16 11:40:40,177 INFO L226 Difference]: Without dead ends: 248 [2020-10-16 11:40:40,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:40:40,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-16 11:40:40,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2020-10-16 11:40:40,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-16 11:40:40,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 626 transitions. [2020-10-16 11:40:40,181 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 626 transitions. Word has length 13 [2020-10-16 11:40:40,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:40,181 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 626 transitions. [2020-10-16 11:40:40,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:40:40,181 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 626 transitions. [2020-10-16 11:40:40,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:40,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:40,182 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:40,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:40,392 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:40,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:40,392 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-16 11:40:40,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:40,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641323355] [2020-10-16 11:40:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:40,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641323355] [2020-10-16 11:40:40,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337141476] [2020-10-16 11:40:40,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:40,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:40,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:40,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:40,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:40,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:40,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:40,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111104848] [2020-10-16 11:40:40,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:40,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:40,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:40,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:40,742 INFO L87 Difference]: Start difference. First operand 240 states and 626 transitions. Second operand 17 states. [2020-10-16 11:40:40,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:40,799 INFO L93 Difference]: Finished difference Result 275 states and 692 transitions. [2020-10-16 11:40:40,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:40:40,800 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:40,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:40,800 INFO L225 Difference]: With dead ends: 275 [2020-10-16 11:40:40,800 INFO L226 Difference]: Without dead ends: 273 [2020-10-16 11:40:40,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:40,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-16 11:40:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 250. [2020-10-16 11:40:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-16 11:40:40,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2020-10-16 11:40:40,804 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 14 [2020-10-16 11:40:40,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:40,804 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2020-10-16 11:40:40,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2020-10-16 11:40:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:40,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:40,810 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:41,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:41,011 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:41,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:41,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-16 11:40:41,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:41,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107221587] [2020-10-16 11:40:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:41,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107221587] [2020-10-16 11:40:41,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835613294] [2020-10-16 11:40:41,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:41,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:40:41,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:41,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:41,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:41,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:41,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:41,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234536256] [2020-10-16 11:40:41,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:41,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:41,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:41,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:41,382 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand 17 states. [2020-10-16 11:40:41,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:41,620 INFO L93 Difference]: Finished difference Result 295 states and 735 transitions. [2020-10-16 11:40:41,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:40:41,620 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:41,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:41,621 INFO L225 Difference]: With dead ends: 295 [2020-10-16 11:40:41,621 INFO L226 Difference]: Without dead ends: 292 [2020-10-16 11:40:41,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:40:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-16 11:40:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 251. [2020-10-16 11:40:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-16 11:40:41,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 657 transitions. [2020-10-16 11:40:41,626 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 657 transitions. Word has length 14 [2020-10-16 11:40:41,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:41,627 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 657 transitions. [2020-10-16 11:40:41,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 657 transitions. [2020-10-16 11:40:41,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:41,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:41,627 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:41,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:41,828 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:41,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:41,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-16 11:40:41,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:41,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015493737] [2020-10-16 11:40:41,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:41,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015493737] [2020-10-16 11:40:41,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193837023] [2020-10-16 11:40:41,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:41,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:41,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:42,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:42,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:42,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956713113] [2020-10-16 11:40:42,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:42,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:42,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:42,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:42,216 INFO L87 Difference]: Start difference. First operand 251 states and 657 transitions. Second operand 17 states. [2020-10-16 11:40:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:42,498 INFO L93 Difference]: Finished difference Result 320 states and 793 transitions. [2020-10-16 11:40:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:40:42,499 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:42,500 INFO L225 Difference]: With dead ends: 320 [2020-10-16 11:40:42,500 INFO L226 Difference]: Without dead ends: 316 [2020-10-16 11:40:42,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:40:42,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-16 11:40:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 253. [2020-10-16 11:40:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-16 11:40:42,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 663 transitions. [2020-10-16 11:40:42,512 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 663 transitions. Word has length 14 [2020-10-16 11:40:42,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:42,512 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 663 transitions. [2020-10-16 11:40:42,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:42,513 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 663 transitions. [2020-10-16 11:40:42,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:42,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:42,513 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:42,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:42,724 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:42,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:42,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-16 11:40:42,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:42,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305719779] [2020-10-16 11:40:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:42,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305719779] [2020-10-16 11:40:42,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127340902] [2020-10-16 11:40:42,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:42,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:42,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:42,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:42,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:43,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:43,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:43,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723591454] [2020-10-16 11:40:43,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:43,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:43,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:43,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:43,128 INFO L87 Difference]: Start difference. First operand 253 states and 663 transitions. Second operand 17 states. [2020-10-16 11:40:43,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:43,458 INFO L93 Difference]: Finished difference Result 316 states and 781 transitions. [2020-10-16 11:40:43,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:40:43,459 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:43,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:43,460 INFO L225 Difference]: With dead ends: 316 [2020-10-16 11:40:43,460 INFO L226 Difference]: Without dead ends: 313 [2020-10-16 11:40:43,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:40:43,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-16 11:40:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 255. [2020-10-16 11:40:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-16 11:40:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 669 transitions. [2020-10-16 11:40:43,465 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 669 transitions. Word has length 14 [2020-10-16 11:40:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:43,465 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 669 transitions. [2020-10-16 11:40:43,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 669 transitions. [2020-10-16 11:40:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:43,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:43,466 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:43,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-16 11:40:43,669 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:43,669 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-16 11:40:43,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:43,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127809473] [2020-10-16 11:40:43,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:43,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127809473] [2020-10-16 11:40:43,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060906097] [2020-10-16 11:40:43,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:43,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:40:43,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:43,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:43,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:47,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:47,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:47,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019345664] [2020-10-16 11:40:47,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:47,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:47,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:47,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-16 11:40:47,465 INFO L87 Difference]: Start difference. First operand 255 states and 669 transitions. Second operand 17 states. [2020-10-16 11:40:51,688 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 11:40:51,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:51,935 INFO L93 Difference]: Finished difference Result 342 states and 843 transitions. [2020-10-16 11:40:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:40:51,936 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:51,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:51,937 INFO L225 Difference]: With dead ends: 342 [2020-10-16 11:40:51,937 INFO L226 Difference]: Without dead ends: 337 [2020-10-16 11:40:51,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-16 11:40:51,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-16 11:40:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 256. [2020-10-16 11:40:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-16 11:40:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-10-16 11:40:51,941 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-10-16 11:40:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:51,941 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-10-16 11:40:51,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-10-16 11:40:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:51,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:51,942 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:52,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 11:40:52,143 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:52,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:52,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-16 11:40:52,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:52,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918324472] [2020-10-16 11:40:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:52,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918324472] [2020-10-16 11:40:52,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799723940] [2020-10-16 11:40:52,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:52,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:52,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:52,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:52,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:53,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:53,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:53,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:53,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684094255] [2020-10-16 11:40:53,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:53,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:53,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:53,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:53,242 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-10-16 11:40:53,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:53,615 INFO L93 Difference]: Finished difference Result 331 states and 819 transitions. [2020-10-16 11:40:53,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:40:53,616 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:53,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:53,617 INFO L225 Difference]: With dead ends: 331 [2020-10-16 11:40:53,617 INFO L226 Difference]: Without dead ends: 327 [2020-10-16 11:40:53,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:40:53,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-16 11:40:53,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 256. [2020-10-16 11:40:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-16 11:40:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-10-16 11:40:53,622 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-10-16 11:40:53,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:53,622 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-10-16 11:40:53,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-10-16 11:40:53,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:53,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:53,622 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:53,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 11:40:53,823 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:53,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:53,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-16 11:40:53,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:53,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155313663] [2020-10-16 11:40:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:53,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155313663] [2020-10-16 11:40:53,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813854373] [2020-10-16 11:40:53,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:53,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:53,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:53,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:53,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:54,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:54,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:54,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804751162] [2020-10-16 11:40:54,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:54,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:54,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:54,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:54,165 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-10-16 11:40:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:54,498 INFO L93 Difference]: Finished difference Result 321 states and 792 transitions. [2020-10-16 11:40:54,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:40:54,499 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:54,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:54,500 INFO L225 Difference]: With dead ends: 321 [2020-10-16 11:40:54,500 INFO L226 Difference]: Without dead ends: 318 [2020-10-16 11:40:54,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:40:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-16 11:40:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2020-10-16 11:40:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-16 11:40:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-10-16 11:40:54,506 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-10-16 11:40:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:54,506 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-10-16 11:40:54,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-10-16 11:40:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:54,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:54,507 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:54,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 11:40:54,718 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:54,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-16 11:40:54,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:54,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664791149] [2020-10-16 11:40:54,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:54,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664791149] [2020-10-16 11:40:54,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180739176] [2020-10-16 11:40:54,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:54,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:40:54,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:54,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:54,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:55,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:55,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:55,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118950694] [2020-10-16 11:40:55,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:55,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:55,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:55,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:55,041 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-10-16 11:40:55,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:55,437 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-10-16 11:40:55,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:40:55,437 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:55,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:55,438 INFO L225 Difference]: With dead ends: 348 [2020-10-16 11:40:55,438 INFO L226 Difference]: Without dead ends: 343 [2020-10-16 11:40:55,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:40:55,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-16 11:40:55,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 260. [2020-10-16 11:40:55,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-16 11:40:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 684 transitions. [2020-10-16 11:40:55,443 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 684 transitions. Word has length 14 [2020-10-16 11:40:55,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:55,443 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 684 transitions. [2020-10-16 11:40:55,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:55,443 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 684 transitions. [2020-10-16 11:40:55,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:55,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:55,443 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:55,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 11:40:55,644 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:55,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:55,645 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-16 11:40:55,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:55,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266229480] [2020-10-16 11:40:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:55,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266229480] [2020-10-16 11:40:55,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96390286] [2020-10-16 11:40:55,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:55,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:55,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:55,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:55,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:55,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107204568] [2020-10-16 11:40:55,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:55,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:55,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:55,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:55,963 INFO L87 Difference]: Start difference. First operand 260 states and 684 transitions. Second operand 17 states. [2020-10-16 11:40:56,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:56,291 INFO L93 Difference]: Finished difference Result 349 states and 864 transitions. [2020-10-16 11:40:56,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:40:56,291 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:56,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:56,292 INFO L225 Difference]: With dead ends: 349 [2020-10-16 11:40:56,292 INFO L226 Difference]: Without dead ends: 344 [2020-10-16 11:40:56,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:56,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-16 11:40:56,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2020-10-16 11:40:56,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-16 11:40:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-10-16 11:40:56,297 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-10-16 11:40:56,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:56,297 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-10-16 11:40:56,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-10-16 11:40:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:56,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:56,298 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:56,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-16 11:40:56,499 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:56,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:56,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-16 11:40:56,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:56,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168083064] [2020-10-16 11:40:56,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:56,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168083064] [2020-10-16 11:40:56,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182446728] [2020-10-16 11:40:56,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:56,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:56,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:56,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:56,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:56,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:56,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:56,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787425080] [2020-10-16 11:40:56,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:56,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:56,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:56,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:56,813 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-10-16 11:40:57,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:57,110 INFO L93 Difference]: Finished difference Result 332 states and 822 transitions. [2020-10-16 11:40:57,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:40:57,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:57,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:57,112 INFO L225 Difference]: With dead ends: 332 [2020-10-16 11:40:57,112 INFO L226 Difference]: Without dead ends: 314 [2020-10-16 11:40:57,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:40:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-16 11:40:57,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 260. [2020-10-16 11:40:57,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-16 11:40:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 677 transitions. [2020-10-16 11:40:57,116 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 677 transitions. Word has length 14 [2020-10-16 11:40:57,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:57,117 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 677 transitions. [2020-10-16 11:40:57,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 677 transitions. [2020-10-16 11:40:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:57,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:57,117 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:57,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:57,318 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:57,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-16 11:40:57,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:57,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607210695] [2020-10-16 11:40:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:57,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607210695] [2020-10-16 11:40:57,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183650394] [2020-10-16 11:40:57,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:57,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:40:57,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:57,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:57,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:57,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:57,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:57,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035979376] [2020-10-16 11:40:57,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:57,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:57,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:57,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:57,650 INFO L87 Difference]: Start difference. First operand 260 states and 677 transitions. Second operand 17 states. [2020-10-16 11:40:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:57,945 INFO L93 Difference]: Finished difference Result 315 states and 779 transitions. [2020-10-16 11:40:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:40:57,946 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:57,947 INFO L225 Difference]: With dead ends: 315 [2020-10-16 11:40:57,947 INFO L226 Difference]: Without dead ends: 312 [2020-10-16 11:40:57,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:40:57,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-16 11:40:57,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 265. [2020-10-16 11:40:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-16 11:40:57,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-10-16 11:40:57,953 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-10-16 11:40:57,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:57,953 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-10-16 11:40:57,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:57,953 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-10-16 11:40:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:57,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:57,954 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:58,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:58,163 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:58,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:58,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-16 11:40:58,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:58,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630868422] [2020-10-16 11:40:58,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:58,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630868422] [2020-10-16 11:40:58,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786220375] [2020-10-16 11:40:58,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:58,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:58,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:58,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:58,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:58,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:58,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:58,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207517384] [2020-10-16 11:40:58,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:58,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:58,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:58,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:58,513 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-10-16 11:40:58,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:58,820 INFO L93 Difference]: Finished difference Result 334 states and 821 transitions. [2020-10-16 11:40:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:40:58,821 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:58,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:58,822 INFO L225 Difference]: With dead ends: 334 [2020-10-16 11:40:58,822 INFO L226 Difference]: Without dead ends: 330 [2020-10-16 11:40:58,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:40:58,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-16 11:40:58,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-10-16 11:40:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-16 11:40:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 687 transitions. [2020-10-16 11:40:58,826 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 687 transitions. Word has length 14 [2020-10-16 11:40:58,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:58,827 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 687 transitions. [2020-10-16 11:40:58,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:58,827 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 687 transitions. [2020-10-16 11:40:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:58,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:58,827 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:59,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:59,028 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:59,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:59,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-16 11:40:59,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:59,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076602605] [2020-10-16 11:40:59,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:59,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076602605] [2020-10-16 11:40:59,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051667093] [2020-10-16 11:40:59,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:59,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:59,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:59,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:59,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:59,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:59,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:59,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159114753] [2020-10-16 11:40:59,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:59,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:59,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:59,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:59,474 INFO L87 Difference]: Start difference. First operand 264 states and 687 transitions. Second operand 17 states. [2020-10-16 11:40:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:59,911 INFO L93 Difference]: Finished difference Result 351 states and 859 transitions. [2020-10-16 11:40:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:40:59,911 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:59,912 INFO L225 Difference]: With dead ends: 351 [2020-10-16 11:40:59,912 INFO L226 Difference]: Without dead ends: 346 [2020-10-16 11:40:59,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:59,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-16 11:40:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2020-10-16 11:40:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-16 11:40:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 700 transitions. [2020-10-16 11:40:59,916 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 700 transitions. Word has length 14 [2020-10-16 11:40:59,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:59,916 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 700 transitions. [2020-10-16 11:40:59,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:59,916 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 700 transitions. [2020-10-16 11:40:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:59,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:59,917 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:00,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:00,119 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:00,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:00,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-16 11:41:00,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:00,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958450316] [2020-10-16 11:41:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:00,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958450316] [2020-10-16 11:41:00,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044945962] [2020-10-16 11:41:00,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:00,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:00,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:00,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:00,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:00,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:00,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:00,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040822032] [2020-10-16 11:41:00,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:00,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:00,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:00,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:00,447 INFO L87 Difference]: Start difference. First operand 269 states and 700 transitions. Second operand 17 states. [2020-10-16 11:41:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:00,806 INFO L93 Difference]: Finished difference Result 357 states and 870 transitions. [2020-10-16 11:41:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:00,807 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:00,807 INFO L225 Difference]: With dead ends: 357 [2020-10-16 11:41:00,808 INFO L226 Difference]: Without dead ends: 339 [2020-10-16 11:41:00,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-10-16 11:41:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 269. [2020-10-16 11:41:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-16 11:41:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 696 transitions. [2020-10-16 11:41:00,812 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 696 transitions. Word has length 14 [2020-10-16 11:41:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:00,813 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 696 transitions. [2020-10-16 11:41:00,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 696 transitions. [2020-10-16 11:41:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:00,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:00,813 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:01,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:01,014 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:01,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:01,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-16 11:41:01,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:01,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685111849] [2020-10-16 11:41:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:01,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685111849] [2020-10-16 11:41:01,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990965499] [2020-10-16 11:41:01,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:01,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:01,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:01,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:01,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:01,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:01,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260911121] [2020-10-16 11:41:01,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:01,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:01,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:01,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:01,414 INFO L87 Difference]: Start difference. First operand 269 states and 696 transitions. Second operand 17 states. [2020-10-16 11:41:01,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:01,726 INFO L93 Difference]: Finished difference Result 332 states and 820 transitions. [2020-10-16 11:41:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:01,727 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:01,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:01,727 INFO L225 Difference]: With dead ends: 332 [2020-10-16 11:41:01,727 INFO L226 Difference]: Without dead ends: 327 [2020-10-16 11:41:01,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:01,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-16 11:41:01,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 266. [2020-10-16 11:41:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-16 11:41:01,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 689 transitions. [2020-10-16 11:41:01,732 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 689 transitions. Word has length 14 [2020-10-16 11:41:01,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:01,732 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 689 transitions. [2020-10-16 11:41:01,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:01,732 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 689 transitions. [2020-10-16 11:41:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:01,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:01,732 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:01,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 11:41:01,934 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:01,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-16 11:41:01,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:01,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310275114] [2020-10-16 11:41:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:02,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310275114] [2020-10-16 11:41:02,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334380209] [2020-10-16 11:41:02,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:02,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:02,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:02,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:02,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:02,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:02,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:02,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776968095] [2020-10-16 11:41:02,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:02,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:02,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:02,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:02,331 INFO L87 Difference]: Start difference. First operand 266 states and 689 transitions. Second operand 17 states. [2020-10-16 11:41:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:02,532 INFO L93 Difference]: Finished difference Result 322 states and 792 transitions. [2020-10-16 11:41:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:41:02,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:02,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:02,534 INFO L225 Difference]: With dead ends: 322 [2020-10-16 11:41:02,534 INFO L226 Difference]: Without dead ends: 309 [2020-10-16 11:41:02,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:02,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-16 11:41:02,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2020-10-16 11:41:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 11:41:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-10-16 11:41:02,538 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-10-16 11:41:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:02,538 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-10-16 11:41:02,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-10-16 11:41:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:02,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:02,539 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:02,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 11:41:02,740 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:02,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:02,740 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-16 11:41:02,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:02,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860458190] [2020-10-16 11:41:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:02,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860458190] [2020-10-16 11:41:02,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239599142] [2020-10-16 11:41:02,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:02,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:02,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:02,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:02,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:03,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:03,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:03,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92979102] [2020-10-16 11:41:03,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:03,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:03,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:03,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:03,191 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-10-16 11:41:03,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:03,295 INFO L93 Difference]: Finished difference Result 305 states and 753 transitions. [2020-10-16 11:41:03,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:03,296 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:03,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:03,297 INFO L225 Difference]: With dead ends: 305 [2020-10-16 11:41:03,297 INFO L226 Difference]: Without dead ends: 303 [2020-10-16 11:41:03,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:41:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-16 11:41:03,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2020-10-16 11:41:03,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-16 11:41:03,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 709 transitions. [2020-10-16 11:41:03,302 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 709 transitions. Word has length 14 [2020-10-16 11:41:03,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:03,303 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 709 transitions. [2020-10-16 11:41:03,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:03,303 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 709 transitions. [2020-10-16 11:41:03,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:03,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:03,304 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:03,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 11:41:03,512 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:03,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:03,513 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-16 11:41:03,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:03,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732092105] [2020-10-16 11:41:03,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:03,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732092105] [2020-10-16 11:41:03,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143557752] [2020-10-16 11:41:03,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:03,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:03,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:03,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:03,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:03,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:03,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:03,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781287225] [2020-10-16 11:41:03,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:03,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:03,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:03,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:03,951 INFO L87 Difference]: Start difference. First operand 274 states and 709 transitions. Second operand 17 states. [2020-10-16 11:41:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:04,229 INFO L93 Difference]: Finished difference Result 325 states and 802 transitions. [2020-10-16 11:41:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:04,230 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:04,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:04,231 INFO L225 Difference]: With dead ends: 325 [2020-10-16 11:41:04,231 INFO L226 Difference]: Without dead ends: 322 [2020-10-16 11:41:04,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:41:04,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-16 11:41:04,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 272. [2020-10-16 11:41:04,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-16 11:41:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-16 11:41:04,235 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-16 11:41:04,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:04,235 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-16 11:41:04,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:04,236 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-16 11:41:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:04,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:04,236 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:04,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 11:41:04,437 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:04,437 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-16 11:41:04,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:04,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569504482] [2020-10-16 11:41:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:04,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569504482] [2020-10-16 11:41:04,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088545012] [2020-10-16 11:41:04,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:04,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:04,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:04,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:04,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:04,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:04,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:04,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92614066] [2020-10-16 11:41:04,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:04,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:04,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:04,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:04,882 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-16 11:41:05,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:05,248 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-10-16 11:41:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:05,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:05,249 INFO L225 Difference]: With dead ends: 348 [2020-10-16 11:41:05,249 INFO L226 Difference]: Without dead ends: 344 [2020-10-16 11:41:05,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-16 11:41:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 270. [2020-10-16 11:41:05,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-16 11:41:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 697 transitions. [2020-10-16 11:41:05,254 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 697 transitions. Word has length 14 [2020-10-16 11:41:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:05,254 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 697 transitions. [2020-10-16 11:41:05,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:05,255 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 697 transitions. [2020-10-16 11:41:05,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:05,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:05,255 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:05,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:05,456 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:05,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:05,456 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-16 11:41:05,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:05,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406245625] [2020-10-16 11:41:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:05,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406245625] [2020-10-16 11:41:05,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898158613] [2020-10-16 11:41:05,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:05,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:05,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:05,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:05,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:05,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:05,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:05,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426796853] [2020-10-16 11:41:05,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:05,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:05,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:05,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:05,881 INFO L87 Difference]: Start difference. First operand 270 states and 697 transitions. Second operand 17 states. [2020-10-16 11:41:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:06,336 INFO L93 Difference]: Finished difference Result 338 states and 827 transitions. [2020-10-16 11:41:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:06,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:06,337 INFO L225 Difference]: With dead ends: 338 [2020-10-16 11:41:06,337 INFO L226 Difference]: Without dead ends: 335 [2020-10-16 11:41:06,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:06,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-16 11:41:06,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 272. [2020-10-16 11:41:06,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-16 11:41:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-16 11:41:06,342 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-16 11:41:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:06,342 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-16 11:41:06,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:06,342 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-16 11:41:06,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:06,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:06,343 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:06,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:06,544 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:06,544 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-16 11:41:06,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:06,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621707291] [2020-10-16 11:41:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:06,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621707291] [2020-10-16 11:41:06,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587897963] [2020-10-16 11:41:06,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:06,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:06,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:09,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:09,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:09,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261338591] [2020-10-16 11:41:09,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:09,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:09,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:09,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-16 11:41:09,901 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-16 11:41:14,123 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 11:41:14,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:14,483 INFO L93 Difference]: Finished difference Result 369 states and 902 transitions. [2020-10-16 11:41:14,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:14,484 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:14,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:14,485 INFO L225 Difference]: With dead ends: 369 [2020-10-16 11:41:14,485 INFO L226 Difference]: Without dead ends: 364 [2020-10-16 11:41:14,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-16 11:41:14,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-16 11:41:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 272. [2020-10-16 11:41:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-16 11:41:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-16 11:41:14,497 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-16 11:41:14,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:14,497 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-16 11:41:14,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:14,498 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-16 11:41:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:14,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:14,498 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:14,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-16 11:41:14,709 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:14,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:14,710 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-16 11:41:14,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:14,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535717444] [2020-10-16 11:41:14,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:14,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535717444] [2020-10-16 11:41:14,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935085123] [2020-10-16 11:41:14,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:14,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:14,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:14,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:14,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:15,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:15,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:15,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384705172] [2020-10-16 11:41:15,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:15,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:15,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:15,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:15,182 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-16 11:41:15,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:15,700 INFO L93 Difference]: Finished difference Result 352 states and 862 transitions. [2020-10-16 11:41:15,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:15,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:15,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:15,702 INFO L225 Difference]: With dead ends: 352 [2020-10-16 11:41:15,703 INFO L226 Difference]: Without dead ends: 348 [2020-10-16 11:41:15,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-16 11:41:15,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 268. [2020-10-16 11:41:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 11:41:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-10-16 11:41:15,707 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-10-16 11:41:15,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:15,708 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-10-16 11:41:15,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:15,708 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-10-16 11:41:15,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:15,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:15,708 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:15,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:15,909 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:15,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:15,910 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-16 11:41:15,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:15,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771737855] [2020-10-16 11:41:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:16,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771737855] [2020-10-16 11:41:16,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469282746] [2020-10-16 11:41:16,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:16,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:16,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:16,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:16,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:16,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:16,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:16,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995226705] [2020-10-16 11:41:16,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:16,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:16,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:16,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:16,282 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-10-16 11:41:16,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:16,717 INFO L93 Difference]: Finished difference Result 330 states and 806 transitions. [2020-10-16 11:41:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:41:16,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:16,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:16,719 INFO L225 Difference]: With dead ends: 330 [2020-10-16 11:41:16,719 INFO L226 Difference]: Without dead ends: 327 [2020-10-16 11:41:16,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:41:16,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-16 11:41:16,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2020-10-16 11:41:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-16 11:41:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-10-16 11:41:16,723 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-10-16 11:41:16,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:16,724 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-10-16 11:41:16,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:16,724 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-10-16 11:41:16,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:16,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:16,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:16,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:16,925 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:16,926 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-16 11:41:16,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:16,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091541709] [2020-10-16 11:41:16,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:17,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091541709] [2020-10-16 11:41:17,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52667496] [2020-10-16 11:41:17,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:17,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:17,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:17,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:17,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:17,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:17,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:17,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915715223] [2020-10-16 11:41:17,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:17,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:17,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:17,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:17,285 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-10-16 11:41:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:17,751 INFO L93 Difference]: Finished difference Result 365 states and 887 transitions. [2020-10-16 11:41:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:41:17,752 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:17,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:17,753 INFO L225 Difference]: With dead ends: 365 [2020-10-16 11:41:17,753 INFO L226 Difference]: Without dead ends: 360 [2020-10-16 11:41:17,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:41:17,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-16 11:41:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 272. [2020-10-16 11:41:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-16 11:41:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-16 11:41:17,758 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-16 11:41:17,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:17,758 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-16 11:41:17,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:17,758 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-16 11:41:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:17,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:17,759 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:17,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:17,960 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:17,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:17,960 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-16 11:41:17,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:17,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081795852] [2020-10-16 11:41:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:18,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081795852] [2020-10-16 11:41:18,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547108934] [2020-10-16 11:41:18,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:18,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:18,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:18,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:18,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:18,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:18,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:18,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252254413] [2020-10-16 11:41:18,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:18,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:18,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:18,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:18,298 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-16 11:41:18,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:18,685 INFO L93 Difference]: Finished difference Result 363 states and 882 transitions. [2020-10-16 11:41:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:41:18,686 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:18,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:18,687 INFO L225 Difference]: With dead ends: 363 [2020-10-16 11:41:18,687 INFO L226 Difference]: Without dead ends: 358 [2020-10-16 11:41:18,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:41:18,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-16 11:41:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 271. [2020-10-16 11:41:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-16 11:41:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-10-16 11:41:18,692 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-10-16 11:41:18,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:18,692 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-10-16 11:41:18,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-10-16 11:41:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:18,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:18,693 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:18,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-16 11:41:18,896 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:18,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:18,896 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-16 11:41:18,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:18,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862559877] [2020-10-16 11:41:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:19,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862559877] [2020-10-16 11:41:19,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474612507] [2020-10-16 11:41:19,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:19,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:19,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:19,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:19,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:19,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:19,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:19,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016866554] [2020-10-16 11:41:19,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:19,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:19,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:19,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:19,235 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-10-16 11:41:19,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:19,562 INFO L93 Difference]: Finished difference Result 333 states and 812 transitions. [2020-10-16 11:41:19,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:19,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:19,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:19,563 INFO L225 Difference]: With dead ends: 333 [2020-10-16 11:41:19,563 INFO L226 Difference]: Without dead ends: 315 [2020-10-16 11:41:19,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:19,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-16 11:41:19,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 266. [2020-10-16 11:41:19,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-16 11:41:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-16 11:41:19,568 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-16 11:41:19,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:19,568 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-16 11:41:19,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:19,568 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-16 11:41:19,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:19,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:19,569 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:19,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 11:41:19,770 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:19,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:19,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-16 11:41:19,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:19,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15986340] [2020-10-16 11:41:19,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:19,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15986340] [2020-10-16 11:41:19,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155782657] [2020-10-16 11:41:19,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:20,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:20,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:20,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:20,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:20,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777620804] [2020-10-16 11:41:20,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:20,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:20,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:20,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:20,227 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-16 11:41:20,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:20,356 INFO L93 Difference]: Finished difference Result 296 states and 732 transitions. [2020-10-16 11:41:20,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:20,357 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:20,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:20,357 INFO L225 Difference]: With dead ends: 296 [2020-10-16 11:41:20,358 INFO L226 Difference]: Without dead ends: 294 [2020-10-16 11:41:20,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:20,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-16 11:41:20,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 270. [2020-10-16 11:41:20,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-16 11:41:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 695 transitions. [2020-10-16 11:41:20,363 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 695 transitions. Word has length 14 [2020-10-16 11:41:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:20,363 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 695 transitions. [2020-10-16 11:41:20,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 695 transitions. [2020-10-16 11:41:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:20,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:20,363 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:20,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-16 11:41:20,564 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:20,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-16 11:41:20,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:20,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895225474] [2020-10-16 11:41:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:20,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895225474] [2020-10-16 11:41:20,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787592634] [2020-10-16 11:41:20,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:20,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:20,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:20,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:20,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:20,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:20,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:20,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167084171] [2020-10-16 11:41:20,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:20,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:20,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:20,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:20,934 INFO L87 Difference]: Start difference. First operand 270 states and 695 transitions. Second operand 17 states. [2020-10-16 11:41:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:21,257 INFO L93 Difference]: Finished difference Result 328 states and 803 transitions. [2020-10-16 11:41:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:21,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:21,259 INFO L225 Difference]: With dead ends: 328 [2020-10-16 11:41:21,259 INFO L226 Difference]: Without dead ends: 325 [2020-10-16 11:41:21,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:21,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-16 11:41:21,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 268. [2020-10-16 11:41:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 11:41:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-16 11:41:21,265 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-16 11:41:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:21,265 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-16 11:41:21,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-16 11:41:21,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:21,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:21,265 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:21,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-16 11:41:21,467 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:21,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-16 11:41:21,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:21,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403063300] [2020-10-16 11:41:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:21,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403063300] [2020-10-16 11:41:21,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920666286] [2020-10-16 11:41:21,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:21,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:21,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:21,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:21,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:22,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:22,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:22,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641734770] [2020-10-16 11:41:22,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:22,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:22,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:22,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:22,587 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-16 11:41:22,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:22,968 INFO L93 Difference]: Finished difference Result 344 states and 841 transitions. [2020-10-16 11:41:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:22,968 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:22,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:22,969 INFO L225 Difference]: With dead ends: 344 [2020-10-16 11:41:22,969 INFO L226 Difference]: Without dead ends: 340 [2020-10-16 11:41:22,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:22,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-16 11:41:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 266. [2020-10-16 11:41:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-16 11:41:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-16 11:41:22,974 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-16 11:41:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:22,975 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-16 11:41:22,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-16 11:41:22,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:22,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:22,976 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:23,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-16 11:41:23,188 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:23,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:23,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-16 11:41:23,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:23,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628743890] [2020-10-16 11:41:23,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:23,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628743890] [2020-10-16 11:41:23,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926932556] [2020-10-16 11:41:23,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:23,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:23,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:23,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:23,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:23,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:23,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:23,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794732237] [2020-10-16 11:41:23,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:23,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:23,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:23,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:23,611 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-16 11:41:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:24,116 INFO L93 Difference]: Finished difference Result 331 states and 805 transitions. [2020-10-16 11:41:24,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:24,117 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:24,117 INFO L225 Difference]: With dead ends: 331 [2020-10-16 11:41:24,118 INFO L226 Difference]: Without dead ends: 328 [2020-10-16 11:41:24,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:41:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-16 11:41:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 268. [2020-10-16 11:41:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 11:41:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-16 11:41:24,122 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-16 11:41:24,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:24,123 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-16 11:41:24,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:24,123 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-16 11:41:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:24,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:24,124 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:24,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-16 11:41:24,333 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:24,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:24,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-16 11:41:24,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:24,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336446902] [2020-10-16 11:41:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:24,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336446902] [2020-10-16 11:41:24,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653167222] [2020-10-16 11:41:24,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:24,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:24,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:24,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:24,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:28,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:28,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:28,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485236759] [2020-10-16 11:41:28,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:28,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:28,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:28,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-16 11:41:28,613 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-16 11:41:32,897 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 11:41:33,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:33,283 INFO L93 Difference]: Finished difference Result 357 states and 866 transitions. [2020-10-16 11:41:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:41:33,284 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:33,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:33,285 INFO L225 Difference]: With dead ends: 357 [2020-10-16 11:41:33,285 INFO L226 Difference]: Without dead ends: 352 [2020-10-16 11:41:33,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-16 11:41:33,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-16 11:41:33,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 268. [2020-10-16 11:41:33,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 11:41:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-16 11:41:33,290 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-16 11:41:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:33,291 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-16 11:41:33,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-16 11:41:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:33,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:33,291 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:33,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:33,492 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:33,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:33,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-10-16 11:41:33,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:33,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837820201] [2020-10-16 11:41:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:33,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837820201] [2020-10-16 11:41:33,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640356736] [2020-10-16 11:41:33,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:33,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:33,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:33,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:33,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:34,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:34,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:34,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909020853] [2020-10-16 11:41:34,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:34,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:34,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:34,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:34,716 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-16 11:41:35,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:35,240 INFO L93 Difference]: Finished difference Result 339 states and 826 transitions. [2020-10-16 11:41:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:41:35,241 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:35,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:35,241 INFO L225 Difference]: With dead ends: 339 [2020-10-16 11:41:35,241 INFO L226 Difference]: Without dead ends: 335 [2020-10-16 11:41:35,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:41:35,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-16 11:41:35,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 264. [2020-10-16 11:41:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-16 11:41:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-10-16 11:41:35,246 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-10-16 11:41:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:35,246 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-10-16 11:41:35,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:35,246 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-10-16 11:41:35,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:35,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:35,246 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:35,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:35,447 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:35,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:35,448 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-10-16 11:41:35,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:35,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274678534] [2020-10-16 11:41:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:35,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274678534] [2020-10-16 11:41:35,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781223473] [2020-10-16 11:41:35,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:35,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:35,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:35,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:35,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:35,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404099349] [2020-10-16 11:41:35,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:35,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:35,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:35,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:35,801 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 17 states. [2020-10-16 11:41:35,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:35,932 INFO L93 Difference]: Finished difference Result 287 states and 713 transitions. [2020-10-16 11:41:35,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:35,933 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:35,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:35,934 INFO L225 Difference]: With dead ends: 287 [2020-10-16 11:41:35,934 INFO L226 Difference]: Without dead ends: 285 [2020-10-16 11:41:35,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:41:35,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-16 11:41:35,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 266. [2020-10-16 11:41:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-16 11:41:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-16 11:41:35,937 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-16 11:41:35,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:35,937 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-16 11:41:35,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-16 11:41:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:35,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:35,938 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:36,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:36,139 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:36,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:36,139 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-10-16 11:41:36,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:36,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141647653] [2020-10-16 11:41:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:36,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141647653] [2020-10-16 11:41:36,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144059734] [2020-10-16 11:41:36,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:36,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:36,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:36,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:36,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:36,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:36,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:36,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413730434] [2020-10-16 11:41:36,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:36,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:36,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:36,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:36,499 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-16 11:41:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:36,865 INFO L93 Difference]: Finished difference Result 317 states and 778 transitions. [2020-10-16 11:41:36,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:36,866 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:36,866 INFO L225 Difference]: With dead ends: 317 [2020-10-16 11:41:36,866 INFO L226 Difference]: Without dead ends: 314 [2020-10-16 11:41:36,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:36,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-16 11:41:36,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 264. [2020-10-16 11:41:36,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-16 11:41:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-10-16 11:41:36,870 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-10-16 11:41:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:36,871 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-10-16 11:41:36,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-10-16 11:41:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:36,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:36,871 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:37,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:37,072 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:37,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:37,073 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-10-16 11:41:37,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:37,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904443959] [2020-10-16 11:41:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:37,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904443959] [2020-10-16 11:41:37,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820981849] [2020-10-16 11:41:37,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:37,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:37,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:37,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:37,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:37,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:37,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:37,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305281703] [2020-10-16 11:41:37,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:37,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:37,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:37,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:37,490 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 17 states. [2020-10-16 11:41:37,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:37,942 INFO L93 Difference]: Finished difference Result 330 states and 807 transitions. [2020-10-16 11:41:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:37,943 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:37,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:37,943 INFO L225 Difference]: With dead ends: 330 [2020-10-16 11:41:37,944 INFO L226 Difference]: Without dead ends: 326 [2020-10-16 11:41:37,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:37,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-16 11:41:37,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 262. [2020-10-16 11:41:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-16 11:41:37,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-10-16 11:41:37,948 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-10-16 11:41:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:37,948 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-10-16 11:41:37,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:37,948 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-10-16 11:41:37,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:37,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:37,949 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:38,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:38,150 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:38,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:38,150 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-10-16 11:41:38,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:38,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002160459] [2020-10-16 11:41:38,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:38,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002160459] [2020-10-16 11:41:38,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189364648] [2020-10-16 11:41:38,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:38,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:38,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:38,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:38,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:38,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:38,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:38,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077668270] [2020-10-16 11:41:38,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:38,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:38,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:38,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:38,529 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-10-16 11:41:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:38,734 INFO L93 Difference]: Finished difference Result 278 states and 694 transitions. [2020-10-16 11:41:38,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:38,735 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:38,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:38,736 INFO L225 Difference]: With dead ends: 278 [2020-10-16 11:41:38,736 INFO L226 Difference]: Without dead ends: 276 [2020-10-16 11:41:38,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:38,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-16 11:41:38,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 262. [2020-10-16 11:41:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-16 11:41:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-10-16 11:41:38,741 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-10-16 11:41:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:38,741 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-10-16 11:41:38,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-10-16 11:41:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:38,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:38,742 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:38,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:38,943 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:38,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:38,943 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-10-16 11:41:38,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:38,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189387971] [2020-10-16 11:41:38,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:39,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189387971] [2020-10-16 11:41:39,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151413995] [2020-10-16 11:41:39,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:39,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:39,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:39,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:39,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:39,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:39,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:39,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812762542] [2020-10-16 11:41:39,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:39,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:39,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:39,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:39,295 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-10-16 11:41:39,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:39,688 INFO L93 Difference]: Finished difference Result 306 states and 753 transitions. [2020-10-16 11:41:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:41:39,689 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:39,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:39,690 INFO L225 Difference]: With dead ends: 306 [2020-10-16 11:41:39,690 INFO L226 Difference]: Without dead ends: 303 [2020-10-16 11:41:39,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-16 11:41:39,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 260. [2020-10-16 11:41:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-16 11:41:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 665 transitions. [2020-10-16 11:41:39,694 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 665 transitions. Word has length 14 [2020-10-16 11:41:39,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:39,694 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 665 transitions. [2020-10-16 11:41:39,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:39,694 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 665 transitions. [2020-10-16 11:41:39,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:39,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:39,695 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:39,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-16 11:41:39,896 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:39,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:39,896 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-10-16 11:41:39,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:39,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691770215] [2020-10-16 11:41:39,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:40,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691770215] [2020-10-16 11:41:40,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851057360] [2020-10-16 11:41:40,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:40,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:40,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:40,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:41:40,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:40,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:40,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:40,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409725819] [2020-10-16 11:41:40,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:40,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:40,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:40,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:40,098 INFO L87 Difference]: Start difference. First operand 260 states and 665 transitions. Second operand 11 states. [2020-10-16 11:41:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:40,288 INFO L93 Difference]: Finished difference Result 269 states and 677 transitions. [2020-10-16 11:41:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:40,289 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:40,289 INFO L225 Difference]: With dead ends: 269 [2020-10-16 11:41:40,289 INFO L226 Difference]: Without dead ends: 267 [2020-10-16 11:41:40,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:41:40,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-16 11:41:40,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2020-10-16 11:41:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-16 11:41:40,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 659 transitions. [2020-10-16 11:41:40,294 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 659 transitions. Word has length 14 [2020-10-16 11:41:40,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:40,294 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 659 transitions. [2020-10-16 11:41:40,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:40,294 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 659 transitions. [2020-10-16 11:41:40,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:40,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:40,294 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:40,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:40,495 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:40,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:40,496 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-10-16 11:41:40,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:40,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781386369] [2020-10-16 11:41:40,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2020-10-16 11:41:40,618 WARN L210 SmtUtils]: Removed 2 from assertion stack [2020-10-16 11:41:40,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2020-10-16 11:41:40,618 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 11:41:40,621 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 11:41:40,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 11:41:40 BasicIcfg [2020-10-16 11:41:40,622 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 11:41:40,623 INFO L168 Benchmark]: Toolchain (without parser) took 280595.93 ms. Allocated memory was 140.5 MB in the beginning and 188.7 MB in the end (delta: 48.2 MB). Free memory was 102.8 MB in the beginning and 132.2 MB in the end (delta: -29.4 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:40,623 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-16 11:41:40,624 INFO L168 Benchmark]: CACSL2BoogieTranslator took 679.74 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 102.6 MB in the beginning and 161.2 MB in the end (delta: -58.6 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:40,624 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.20 ms. Allocated memory is still 203.9 MB. Free memory was 161.2 MB in the beginning and 159.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:40,624 INFO L168 Benchmark]: Boogie Preprocessor took 26.13 ms. Allocated memory is still 203.9 MB. Free memory was 159.3 MB in the beginning and 157.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:40,625 INFO L168 Benchmark]: RCFGBuilder took 372.33 ms. Allocated memory is still 203.9 MB. Free memory was 157.9 MB in the beginning and 137.3 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:40,625 INFO L168 Benchmark]: TraceAbstraction took 279468.89 ms. Allocated memory was 203.9 MB in the beginning and 188.7 MB in the end (delta: -15.2 MB). Free memory was 136.6 MB in the beginning and 132.2 MB in the end (delta: 4.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-16 11:41:40,627 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 679.74 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 102.6 MB in the beginning and 161.2 MB in the end (delta: -58.6 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.20 ms. Allocated memory is still 203.9 MB. Free memory was 161.2 MB in the beginning and 159.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.13 ms. Allocated memory is still 203.9 MB. Free memory was 159.3 MB in the beginning and 157.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 372.33 ms. Allocated memory is still 203.9 MB. Free memory was 157.9 MB in the beginning and 137.3 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 279468.89 ms. Allocated memory was 203.9 MB in the beginning and 188.7 MB in the end (delta: -15.2 MB). Free memory was 136.6 MB in the beginning and 132.2 MB in the end (delta: 4.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 561 VarBasedMoverChecksPositive, 10 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 50 TotalNumberOfCompositions, 943 MoverChecksTotal - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 5,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 4ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 279.3s, OverallIterations: 180, TraceHistogramMax: 6, AutomataDifference: 175.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 2379 SDtfs, 15435 SDslu, 15544 SDs, 0 SdLazy, 11034 SolverSat, 3995 SolverUnsat, 37 SolverUnknown, 0 SolverNotchecked, 76.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4436 GetRequests, 862 SyntacticMatches, 148 SemanticMatches, 3426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17522 ImplicationChecksByTransitivity, 145.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=274occurred in iteration=158, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 179 MinimizatonAttempts, 8253 StatesRemovedByMinimization, 178 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 56.4s InterpolantComputationTime, 4372 NumberOfCodeBlocks, 4370 NumberOfCodeBlocksAsserted, 540 NumberOfCheckSat, 4022 ConstructedInterpolants, 10 QuantifiedInterpolants, 417999 SizeOfPredicates, 169 NumberOfNonLiveVariables, 14831 ConjunctsInSsa, 1659 ConjunctsInUnsatCore, 350 InterpolantComputations, 10 PerfectInterpolantSequences, 30/1620 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown