/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/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c7e336b [2020-10-05 23:12:06,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-05 23:12:06,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-05 23:12:06,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-05 23:12:06,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-05 23:12:06,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-05 23:12:06,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-05 23:12:06,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-05 23:12:06,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-05 23:12:06,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-05 23:12:06,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-05 23:12:06,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-05 23:12:06,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-05 23:12:06,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-05 23:12:06,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-05 23:12:06,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-05 23:12:06,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-05 23:12:06,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-05 23:12:06,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-05 23:12:06,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-05 23:12:06,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-05 23:12:06,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-05 23:12:06,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-05 23:12:06,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-05 23:12:06,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-05 23:12:06,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-05 23:12:06,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-05 23:12:06,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-05 23:12:06,574 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-05 23:12:06,575 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-05 23:12:06,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-05 23:12:06,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-05 23:12:06,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-05 23:12:06,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-05 23:12:06,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-05 23:12:06,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-05 23:12:06,580 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-05 23:12:06,603 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-05 23:12:06,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-05 23:12:06,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-05 23:12:06,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-05 23:12:06,606 INFO L138 SettingsManager]: * Use SBE=true [2020-10-05 23:12:06,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-05 23:12:06,606 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-05 23:12:06,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-05 23:12:06,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-05 23:12:06,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-05 23:12:06,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-05 23:12:06,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-05 23:12:06,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-05 23:12:06,607 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-05 23:12:06,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-05 23:12:06,608 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-05 23:12:06,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-05 23:12:06,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-05 23:12:06,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-05 23:12:06,609 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-05 23:12:06,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-05 23:12:06,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 23:12:06,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-05 23:12:06,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-05 23:12:06,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-05 23:12:06,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-05 23:12:06,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-05 23:12:06,610 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-05 23:12:06,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-05 23:12:06,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-05 23:12:06,948 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-05 23:12:06,951 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-05 23:12:06,953 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-05 23:12:06,953 INFO L275 PluginConnector]: CDTParser initialized [2020-10-05 23:12:06,954 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-05 23:12:07,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bd48877f/78a9df23d32d44d08ab299a404b93a07/FLAGb6fe149d9 [2020-10-05 23:12:07,609 INFO L306 CDTParser]: Found 1 translation units. [2020-10-05 23:12:07,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-05 23:12:07,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bd48877f/78a9df23d32d44d08ab299a404b93a07/FLAGb6fe149d9 [2020-10-05 23:12:07,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bd48877f/78a9df23d32d44d08ab299a404b93a07 [2020-10-05 23:12:07,901 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-05 23:12:07,903 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-05 23:12:07,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-05 23:12:07,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-05 23:12:07,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-05 23:12:07,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:12:07" (1/1) ... [2020-10-05 23:12:07,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ba796e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:07, skipping insertion in model container [2020-10-05 23:12:07,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:12:07" (1/1) ... [2020-10-05 23:12:07,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-05 23:12:07,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-05 23:12:08,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 23:12:08,488 INFO L203 MainTranslator]: Completed pre-run [2020-10-05 23:12:08,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 23:12:08,611 INFO L208 MainTranslator]: Completed translation [2020-10-05 23:12:08,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:08 WrapperNode [2020-10-05 23:12:08,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-05 23:12:08,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-05 23:12:08,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-05 23:12:08,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-05 23:12:08,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:08" (1/1) ... [2020-10-05 23:12:08,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:08" (1/1) ... [2020-10-05 23:12:08,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-05 23:12:08,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-05 23:12:08,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-05 23:12:08,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-05 23:12:08,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:08" (1/1) ... [2020-10-05 23:12:08,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:08" (1/1) ... [2020-10-05 23:12:08,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:08" (1/1) ... [2020-10-05 23:12:08,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:08" (1/1) ... [2020-10-05 23:12:08,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:08" (1/1) ... [2020-10-05 23:12:08,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:08" (1/1) ... [2020-10-05 23:12:08,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:08" (1/1) ... [2020-10-05 23:12:08,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-05 23:12:08,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-05 23:12:08,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-05 23:12:08,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-05 23:12:08,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 23:12:08,766 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-05 23:12:08,767 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-05 23:12:08,767 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-05 23:12:08,768 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-05 23:12:08,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-05 23:12:08,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-05 23:12:08,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-05 23:12:08,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-05 23:12:08,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-05 23:12:08,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-05 23:12:08,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-05 23:12:08,772 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-05 23:12:09,097 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-05 23:12:09,098 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-05 23:12:09,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:12:09 BoogieIcfgContainer [2020-10-05 23:12:09,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-05 23:12:09,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-05 23:12:09,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-05 23:12:09,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-05 23:12:09,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 11:12:07" (1/3) ... [2020-10-05 23:12:09,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cc4971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:12:09, skipping insertion in model container [2020-10-05 23:12:09,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:08" (2/3) ... [2020-10-05 23:12:09,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cc4971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:12:09, skipping insertion in model container [2020-10-05 23:12:09,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:12:09" (3/3) ... [2020-10-05 23:12:09,115 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-10-05 23:12:09,128 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-05 23:12:09,129 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-05 23:12:09,138 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-05 23:12:09,140 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-05 23:12:09,175 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,176 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,176 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,176 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,177 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,177 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,177 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,178 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,178 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,178 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,179 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,179 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,180 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,184 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,185 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,185 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,185 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,186 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,186 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,186 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,187 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,190 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,191 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,192 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,192 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,193 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,194 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,195 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,205 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,209 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,210 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,210 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,210 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,210 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,229 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,229 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,229 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,230 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,230 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,230 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:09,252 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-05 23:12:09,277 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:12:09,277 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:12:09,277 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:12:09,278 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 23:12:09,278 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:12:09,278 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:12:09,278 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:12:09,278 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:12:09,294 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-05 23:12:09,296 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-05 23:12:09,346 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-05 23:12:09,346 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-05 23:12:09,357 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-05 23:12:09,360 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-05 23:12:09,379 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-05 23:12:09,379 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-05 23:12:09,380 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-05 23:12:09,383 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-10-05 23:12:09,384 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:12:10,356 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-05 23:12:10,581 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-10-05 23:12:10,581 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-10-05 23:12:10,586 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-05 23:12:10,598 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-05 23:12:10,600 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-05 23:12:10,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-05 23:12:10,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:10,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-05 23:12:10,608 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:10,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:10,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-05 23:12:10,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:10,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648546305] [2020-10-05 23:12:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:10,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648546305] [2020-10-05 23:12:10,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:12:10,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:12:10,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539259751] [2020-10-05 23:12:10,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:12:10,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:10,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:12:10,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:12:10,880 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-05 23:12:10,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:10,954 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-05 23:12:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:12:10,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-05 23:12:10,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:10,969 INFO L225 Difference]: With dead ends: 75 [2020-10-05 23:12:10,970 INFO L226 Difference]: Without dead ends: 42 [2020-10-05 23:12:10,972 INFO L675 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 [2020-10-05 23:12:10,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-05 23:12:11,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-05 23:12:11,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 23:12:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-05 23:12:11,016 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-05 23:12:11,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:11,016 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-05 23:12:11,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:12:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-05 23:12:11,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-05 23:12:11,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:11,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:11,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-05 23:12:11,018 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:11,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-05 23:12:11,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:11,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207441963] [2020-10-05 23:12:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:11,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:11,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207441963] [2020-10-05 23:12:11,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:12:11,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:12:11,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791917407] [2020-10-05 23:12:11,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 23:12:11,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:11,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 23:12:11,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-05 23:12:11,105 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-05 23:12:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:11,143 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-05 23:12:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:12:11,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-05 23:12:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:11,146 INFO L225 Difference]: With dead ends: 56 [2020-10-05 23:12:11,146 INFO L226 Difference]: Without dead ends: 50 [2020-10-05 23:12:11,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:12:11,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-05 23:12:11,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-05 23:12:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 23:12:11,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-05 23:12:11,155 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-05 23:12:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:11,157 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-05 23:12:11,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 23:12:11,157 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-05 23:12:11,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:12:11,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:11,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:11,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-05 23:12:11,159 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:11,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:11,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-05 23:12:11,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:11,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84739150] [2020-10-05 23:12:11,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:11,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84739150] [2020-10-05 23:12:11,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:12:11,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 23:12:11,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436257694] [2020-10-05 23:12:11,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:12:11,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:11,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:12:11,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:12:11,247 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-05 23:12:11,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:11,332 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-05 23:12:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 23:12:11,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 23:12:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:11,334 INFO L225 Difference]: With dead ends: 78 [2020-10-05 23:12:11,334 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 23:12:11,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:12:11,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 23:12:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-05 23:12:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 23:12:11,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-05 23:12:11,344 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-05 23:12:11,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:11,345 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-05 23:12:11,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:12:11,345 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-05 23:12:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:12:11,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:11,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:11,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-05 23:12:11,347 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:11,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:11,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-05 23:12:11,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:11,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844822054] [2020-10-05 23:12:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:11,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844822054] [2020-10-05 23:12:11,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:12:11,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 23:12:11,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876303406] [2020-10-05 23:12:11,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:12:11,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:11,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:12:11,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:12:11,417 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-05 23:12:11,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:11,482 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-05 23:12:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 23:12:11,483 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 23:12:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:11,484 INFO L225 Difference]: With dead ends: 54 [2020-10-05 23:12:11,484 INFO L226 Difference]: Without dead ends: 43 [2020-10-05 23:12:11,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:12:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-05 23:12:11,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-05 23:12:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-05 23:12:11,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-05 23:12:11,489 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-05 23:12:11,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:11,490 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-05 23:12:11,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:12:11,490 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-05 23:12:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:12:11,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:11,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:11,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-05 23:12:11,491 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:11,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:11,492 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-05 23:12:11,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:11,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123755768] [2020-10-05 23:12:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:11,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123755768] [2020-10-05 23:12:11,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:12:11,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 23:12:11,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737230686] [2020-10-05 23:12:11,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:12:11,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:11,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:12:11,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:12:11,551 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-05 23:12:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:11,612 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-05 23:12:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 23:12:11,613 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 23:12:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:11,614 INFO L225 Difference]: With dead ends: 57 [2020-10-05 23:12:11,614 INFO L226 Difference]: Without dead ends: 51 [2020-10-05 23:12:11,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:12:11,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-05 23:12:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-05 23:12:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-05 23:12:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-05 23:12:11,620 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-05 23:12:11,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:11,620 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-05 23:12:11,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:12:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-05 23:12:11,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 23:12:11,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:11,621 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:11,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-05 23:12:11,622 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:11,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:11,622 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-05 23:12:11,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:11,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483501840] [2020-10-05 23:12:11,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:11,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483501840] [2020-10-05 23:12:11,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876253058] [2020-10-05 23:12:11,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:11,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:11,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:11,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:12:11,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:11,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:11,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:11,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 23:12:11,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251044259] [2020-10-05 23:12:11,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:12:11,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:11,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:12:11,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:12:11,810 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-05 23:12:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:11,941 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-05 23:12:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 23:12:11,941 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-05 23:12:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:11,942 INFO L225 Difference]: With dead ends: 48 [2020-10-05 23:12:11,943 INFO L226 Difference]: Without dead ends: 43 [2020-10-05 23:12:11,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:11,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-05 23:12:11,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-05 23:12:11,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-05 23:12:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-05 23:12:11,948 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-05 23:12:11,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:11,948 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-05 23:12:11,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:12:11,949 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-05 23:12:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 23:12:11,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:11,950 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:12,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-05 23:12:12,163 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:12,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:12,163 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-05 23:12:12,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:12,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119407120] [2020-10-05 23:12:12,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:12,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119407120] [2020-10-05 23:12:12,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101979265] [2020-10-05 23:12:12,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:12,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:12,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:12,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:12:12,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:12,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:12,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-05 23:12:12,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17100640] [2020-10-05 23:12:12,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 23:12:12,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:12,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 23:12:12,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-05 23:12:12,343 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-05 23:12:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:12,408 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-05 23:12:12,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 23:12:12,409 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-05 23:12:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:12,410 INFO L225 Difference]: With dead ends: 54 [2020-10-05 23:12:12,410 INFO L226 Difference]: Without dead ends: 48 [2020-10-05 23:12:12,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:12:12,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-05 23:12:12,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-05 23:12:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 23:12:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-05 23:12:12,416 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-05 23:12:12,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:12,416 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-05 23:12:12,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 23:12:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-05 23:12:12,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 23:12:12,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:12,418 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:12,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:12,630 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:12,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:12,630 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-05 23:12:12,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:12,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070822772] [2020-10-05 23:12:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:12,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070822772] [2020-10-05 23:12:12,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014450042] [2020-10-05 23:12:12,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:12,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 23:12:12,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:12,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:12:12,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:12,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:12,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:12,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 23:12:12,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064231575] [2020-10-05 23:12:12,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:12:12,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:12,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:12:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:12:12,781 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-05 23:12:12,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:12,885 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-05 23:12:12,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 23:12:12,886 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-05 23:12:12,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:12,887 INFO L225 Difference]: With dead ends: 58 [2020-10-05 23:12:12,887 INFO L226 Difference]: Without dead ends: 52 [2020-10-05 23:12:12,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:12,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-05 23:12:12,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-05 23:12:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-05 23:12:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-05 23:12:12,893 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-05 23:12:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:12,893 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-05 23:12:12,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:12:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-05 23:12:12,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 23:12:12,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:12,894 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:13,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:13,106 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:13,107 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-05 23:12:13,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:13,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502764765] [2020-10-05 23:12:13,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:13,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502764765] [2020-10-05 23:12:13,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474487811] [2020-10-05 23:12:13,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:13,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:12:13,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:13,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:13,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-05 23:12:13,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266624239] [2020-10-05 23:12:13,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 23:12:13,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:13,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 23:12:13,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-05 23:12:13,215 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-05 23:12:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:13,355 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-05 23:12:13,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 23:12:13,355 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-05 23:12:13,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:13,356 INFO L225 Difference]: With dead ends: 78 [2020-10-05 23:12:13,356 INFO L226 Difference]: Without dead ends: 72 [2020-10-05 23:12:13,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:13,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-05 23:12:13,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-05 23:12:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 23:12:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-05 23:12:13,363 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-05 23:12:13,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:13,363 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-05 23:12:13,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 23:12:13,363 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-05 23:12:13,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 23:12:13,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:13,364 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:13,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:13,577 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:13,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:13,578 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-05 23:12:13,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:13,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73777268] [2020-10-05 23:12:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:13,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73777268] [2020-10-05 23:12:13,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857718204] [2020-10-05 23:12:13,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:13,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:13,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:13,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:12:13,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:13,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:13,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:13,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 23:12:13,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463000413] [2020-10-05 23:12:13,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:12:13,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:13,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:12:13,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:12:13,745 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-05 23:12:13,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:13,924 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-05 23:12:13,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 23:12:13,925 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-05 23:12:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:13,926 INFO L225 Difference]: With dead ends: 62 [2020-10-05 23:12:13,926 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 23:12:13,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:13,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 23:12:13,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-05 23:12:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-05 23:12:13,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-05 23:12:13,940 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-05 23:12:13,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:13,940 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-05 23:12:13,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:12:13,941 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-05 23:12:13,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 23:12:13,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:13,942 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:14,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-05 23:12:14,155 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:14,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:14,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-05 23:12:14,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:14,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91035161] [2020-10-05 23:12:14,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:14,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91035161] [2020-10-05 23:12:14,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733851509] [2020-10-05 23:12:14,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:14,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 23:12:14,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:14,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 23:12:14,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:14,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:14,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-05 23:12:14,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600442281] [2020-10-05 23:12:14,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:12:14,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:14,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:12:14,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:12:14,290 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-05 23:12:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:14,396 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-05 23:12:14,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 23:12:14,397 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-05 23:12:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:14,398 INFO L225 Difference]: With dead ends: 64 [2020-10-05 23:12:14,398 INFO L226 Difference]: Without dead ends: 58 [2020-10-05 23:12:14,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:14,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-05 23:12:14,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-05 23:12:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-05 23:12:14,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-05 23:12:14,403 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-05 23:12:14,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:14,403 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-05 23:12:14,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:12:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-05 23:12:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 23:12:14,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:14,404 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:14,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:14,605 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:14,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:14,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-05 23:12:14,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:14,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532445322] [2020-10-05 23:12:14,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:14,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532445322] [2020-10-05 23:12:14,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268646484] [2020-10-05 23:12:14,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:14,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:14,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:14,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 23:12:14,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:14,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:14,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:14,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 23:12:14,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676372004] [2020-10-05 23:12:14,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:12:14,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:14,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:12:14,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:12:14,758 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-05 23:12:14,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:14,938 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-05 23:12:14,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 23:12:14,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 23:12:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:14,940 INFO L225 Difference]: With dead ends: 61 [2020-10-05 23:12:14,940 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 23:12:14,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:12:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 23:12:14,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-05 23:12:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-05 23:12:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-05 23:12:14,946 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-05 23:12:14,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:14,946 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-05 23:12:14,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:12:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-05 23:12:14,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 23:12:14,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:14,947 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:15,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:15,159 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:15,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-05 23:12:15,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:15,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332680303] [2020-10-05 23:12:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:15,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332680303] [2020-10-05 23:12:15,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947148171] [2020-10-05 23:12:15,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:15,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:15,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:15,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 23:12:15,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:15,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:15,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-05 23:12:15,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642134124] [2020-10-05 23:12:15,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:12:15,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:15,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:12:15,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:12:15,350 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-05 23:12:15,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:15,500 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-05 23:12:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 23:12:15,501 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-05 23:12:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:15,502 INFO L225 Difference]: With dead ends: 77 [2020-10-05 23:12:15,502 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 23:12:15,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 23:12:15,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-05 23:12:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-05 23:12:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-05 23:12:15,507 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-05 23:12:15,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:15,507 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-05 23:12:15,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:12:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-05 23:12:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 23:12:15,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:15,508 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:15,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-05 23:12:15,721 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:15,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-05 23:12:15,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:15,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804041672] [2020-10-05 23:12:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:15,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804041672] [2020-10-05 23:12:15,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327534901] [2020-10-05 23:12:15,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:15,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 23:12:15,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:15,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:15,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:15,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:15,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 23:12:15,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075384876] [2020-10-05 23:12:15,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:12:15,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:15,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:12:15,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:12:15,855 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-05 23:12:16,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:16,027 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-05 23:12:16,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 23:12:16,028 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 23:12:16,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:16,029 INFO L225 Difference]: With dead ends: 56 [2020-10-05 23:12:16,029 INFO L226 Difference]: Without dead ends: 48 [2020-10-05 23:12:16,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:12:16,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-05 23:12:16,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-10-05 23:12:16,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-05 23:12:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-05 23:12:16,034 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-05 23:12:16,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:16,035 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-05 23:12:16,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:12:16,035 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-05 23:12:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 23:12:16,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:16,036 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:16,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:16,247 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:16,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:16,247 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-05 23:12:16,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:16,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471605835] [2020-10-05 23:12:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:16,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471605835] [2020-10-05 23:12:16,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771253587] [2020-10-05 23:12:16,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:16,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 23:12:16,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:16,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:16,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:16,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 23:12:16,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555106314] [2020-10-05 23:12:16,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:12:16,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:16,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:12:16,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:12:16,403 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-05 23:12:16,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:16,577 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-05 23:12:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 23:12:16,578 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 23:12:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:16,579 INFO L225 Difference]: With dead ends: 60 [2020-10-05 23:12:16,579 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 23:12:16,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:12:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 23:12:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-05 23:12:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 23:12:16,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-05 23:12:16,583 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-05 23:12:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:16,584 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-05 23:12:16,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:12:16,584 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-05 23:12:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:12:16,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:16,585 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:16,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-05 23:12:16,796 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:16,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-05 23:12:16,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:16,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142240238] [2020-10-05 23:12:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:16,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142240238] [2020-10-05 23:12:16,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052084186] [2020-10-05 23:12:16,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:16,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:16,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:16,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:16,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:16,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:16,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:16,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 23:12:16,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922469244] [2020-10-05 23:12:16,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:12:16,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:16,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:12:16,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:12:16,974 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-05 23:12:17,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:17,165 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-05 23:12:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 23:12:17,165 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 23:12:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:17,166 INFO L225 Difference]: With dead ends: 54 [2020-10-05 23:12:17,166 INFO L226 Difference]: Without dead ends: 49 [2020-10-05 23:12:17,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:12:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-05 23:12:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-05 23:12:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-05 23:12:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-05 23:12:17,170 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-05 23:12:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:17,170 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-05 23:12:17,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:12:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-05 23:12:17,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:12:17,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:17,171 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:17,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-05 23:12:17,380 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:17,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:17,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-05 23:12:17,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:17,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871282934] [2020-10-05 23:12:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:17,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871282934] [2020-10-05 23:12:17,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633296921] [2020-10-05 23:12:17,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:17,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 23:12:17,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:17,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:17,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:17,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:17,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-05 23:12:17,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273465960] [2020-10-05 23:12:17,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:12:17,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:12:17,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:12:17,535 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-05 23:12:17,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:17,628 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-05 23:12:17,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 23:12:17,629 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 23:12:17,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:17,629 INFO L225 Difference]: With dead ends: 60 [2020-10-05 23:12:17,630 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 23:12:17,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 23:12:17,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-05 23:12:17,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 23:12:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-05 23:12:17,633 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-05 23:12:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:17,633 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-05 23:12:17,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:12:17,634 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-05 23:12:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:12:17,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:17,634 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:17,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-05 23:12:17,845 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:17,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:17,845 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-05 23:12:17,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:17,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611601410] [2020-10-05 23:12:17,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:17,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611601410] [2020-10-05 23:12:17,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026332591] [2020-10-05 23:12:17,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:17,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:17,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:17,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:17,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:17,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:18,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:18,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 23:12:18,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923349651] [2020-10-05 23:12:18,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:12:18,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:18,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:12:18,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:12:18,007 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-05 23:12:18,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:18,142 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-05 23:12:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 23:12:18,142 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 23:12:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:18,143 INFO L225 Difference]: With dead ends: 66 [2020-10-05 23:12:18,144 INFO L226 Difference]: Without dead ends: 60 [2020-10-05 23:12:18,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:12:18,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-05 23:12:18,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-05 23:12:18,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-05 23:12:18,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-05 23:12:18,148 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-05 23:12:18,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:18,148 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-05 23:12:18,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:12:18,148 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-05 23:12:18,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:12:18,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:18,149 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:18,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-05 23:12:18,361 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:18,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:18,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-05 23:12:18,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:18,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531645802] [2020-10-05 23:12:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:18,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531645802] [2020-10-05 23:12:18,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674843574] [2020-10-05 23:12:18,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:18,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 23:12:18,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:18,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:18,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:18,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:18,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-05 23:12:18,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497426184] [2020-10-05 23:12:18,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:12:18,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:18,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:12:18,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:12:18,530 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-05 23:12:18,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:18,696 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-05 23:12:18,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 23:12:18,698 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 23:12:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:18,698 INFO L225 Difference]: With dead ends: 67 [2020-10-05 23:12:18,699 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 23:12:18,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:12:18,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 23:12:18,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-05 23:12:18,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-05 23:12:18,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-05 23:12:18,702 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-05 23:12:18,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:18,702 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-05 23:12:18,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:12:18,703 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-05 23:12:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:12:18,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:18,703 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:18,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:18,913 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:18,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:18,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-05 23:12:18,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:18,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487911133] [2020-10-05 23:12:18,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:18,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487911133] [2020-10-05 23:12:18,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976313388] [2020-10-05 23:12:18,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:19,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 23:12:19,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:19,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:19,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:19,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:19,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:19,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 23:12:19,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161511583] [2020-10-05 23:12:19,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:12:19,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:19,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:12:19,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:12:19,062 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-05 23:12:19,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:19,267 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-05 23:12:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 23:12:19,267 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 23:12:19,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:19,268 INFO L225 Difference]: With dead ends: 69 [2020-10-05 23:12:19,268 INFO L226 Difference]: Without dead ends: 63 [2020-10-05 23:12:19,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:12:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-05 23:12:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-05 23:12:19,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 23:12:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-05 23:12:19,272 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-05 23:12:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:19,272 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-05 23:12:19,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:12:19,273 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-05 23:12:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:12:19,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:19,273 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:19,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:19,482 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:19,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-05 23:12:19,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:19,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129695714] [2020-10-05 23:12:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:19,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129695714] [2020-10-05 23:12:19,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447504677] [2020-10-05 23:12:19,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:19,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:19,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:19,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:19,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-05 23:12:19,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808510795] [2020-10-05 23:12:19,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:12:19,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:19,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:12:19,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:12:19,609 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-05 23:12:19,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:19,804 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-05 23:12:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:19,807 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 23:12:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:19,808 INFO L225 Difference]: With dead ends: 88 [2020-10-05 23:12:19,808 INFO L226 Difference]: Without dead ends: 82 [2020-10-05 23:12:19,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:12:19,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-05 23:12:19,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-05 23:12:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 23:12:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-05 23:12:19,816 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-05 23:12:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:19,816 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-05 23:12:19,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:12:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-05 23:12:19,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:12:19,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:19,818 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:20,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:20,019 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:20,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:20,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-05 23:12:20,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:20,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842364421] [2020-10-05 23:12:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:20,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842364421] [2020-10-05 23:12:20,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027829533] [2020-10-05 23:12:20,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:20,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:20,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:20,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:20,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:20,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:20,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:20,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 23:12:20,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768015037] [2020-10-05 23:12:20,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:12:20,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:20,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:12:20,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:12:20,150 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-05 23:12:20,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:20,418 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-05 23:12:20,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 23:12:20,418 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 23:12:20,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:20,419 INFO L225 Difference]: With dead ends: 69 [2020-10-05 23:12:20,419 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 23:12:20,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:12:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 23:12:20,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-05 23:12:20,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-05 23:12:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-05 23:12:20,423 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-05 23:12:20,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:20,423 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-05 23:12:20,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:12:20,423 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-05 23:12:20,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 23:12:20,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:20,424 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:20,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-05 23:12:20,632 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:20,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-05 23:12:20,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:20,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956720805] [2020-10-05 23:12:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:20,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956720805] [2020-10-05 23:12:20,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276112171] [2020-10-05 23:12:20,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:20,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 23:12:20,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:20,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 23:12:20,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:20,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:20,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-05 23:12:20,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505656677] [2020-10-05 23:12:20,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:12:20,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:20,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:12:20,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:12:20,772 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-05 23:12:20,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:20,906 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-05 23:12:20,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 23:12:20,907 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 23:12:20,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:20,907 INFO L225 Difference]: With dead ends: 74 [2020-10-05 23:12:20,908 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 23:12:20,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:12:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 23:12:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-05 23:12:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 23:12:20,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-05 23:12:20,911 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-05 23:12:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:20,911 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-05 23:12:20,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:12:20,912 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-05 23:12:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 23:12:20,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:20,912 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:21,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-05 23:12:21,116 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:21,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:21,116 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-05 23:12:21,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:21,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137719303] [2020-10-05 23:12:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:21,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137719303] [2020-10-05 23:12:21,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060688495] [2020-10-05 23:12:21,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:21,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:21,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:21,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 23:12:21,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:21,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:21,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:21,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 23:12:21,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999283416] [2020-10-05 23:12:21,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:21,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:21,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:21,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:21,277 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-05 23:12:21,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:21,469 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-05 23:12:21,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 23:12:21,470 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 23:12:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:21,471 INFO L225 Difference]: With dead ends: 71 [2020-10-05 23:12:21,471 INFO L226 Difference]: Without dead ends: 65 [2020-10-05 23:12:21,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:12:21,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-05 23:12:21,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-05 23:12:21,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 23:12:21,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-05 23:12:21,475 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-05 23:12:21,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:21,475 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-05 23:12:21,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:21,475 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-05 23:12:21,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 23:12:21,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:21,476 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:21,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-05 23:12:21,687 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:21,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:21,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-05 23:12:21,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:21,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537968688] [2020-10-05 23:12:21,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:21,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537968688] [2020-10-05 23:12:21,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954852969] [2020-10-05 23:12:21,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:21,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 23:12:21,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:21,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 23:12:21,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:21,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:21,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-05 23:12:21,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037469396] [2020-10-05 23:12:21,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:12:21,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:21,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:12:21,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:12:21,828 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-05 23:12:22,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:22,032 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-05 23:12:22,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 23:12:22,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 23:12:22,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:22,033 INFO L225 Difference]: With dead ends: 68 [2020-10-05 23:12:22,033 INFO L226 Difference]: Without dead ends: 62 [2020-10-05 23:12:22,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:12:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-05 23:12:22,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-05 23:12:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 23:12:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-05 23:12:22,036 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-05 23:12:22,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:22,037 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-05 23:12:22,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:12:22,037 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-05 23:12:22,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 23:12:22,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:22,038 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:22,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-05 23:12:22,246 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:22,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:22,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-05 23:12:22,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:22,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853143596] [2020-10-05 23:12:22,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:22,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853143596] [2020-10-05 23:12:22,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197677776] [2020-10-05 23:12:22,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:22,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 23:12:22,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:22,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 23:12:22,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:22,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:22,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:22,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 23:12:22,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399864670] [2020-10-05 23:12:22,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:22,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:22,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:22,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:22,474 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-05 23:12:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:22,710 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-05 23:12:22,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 23:12:22,711 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 23:12:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:22,712 INFO L225 Difference]: With dead ends: 67 [2020-10-05 23:12:22,712 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 23:12:22,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:12:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 23:12:22,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-05 23:12:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 23:12:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-05 23:12:22,716 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-05 23:12:22,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:22,717 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-05 23:12:22,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-05 23:12:22,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 23:12:22,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:22,720 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:22,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-05 23:12:22,930 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:22,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:22,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-05 23:12:22,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:22,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842593085] [2020-10-05 23:12:22,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:23,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842593085] [2020-10-05 23:12:23,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173673296] [2020-10-05 23:12:23,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:23,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 23:12:23,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:23,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:23,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-05 23:12:23,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909810549] [2020-10-05 23:12:23,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:12:23,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:23,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:12:23,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:12:23,089 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-05 23:12:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:23,302 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-05 23:12:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:23,302 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 23:12:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:23,303 INFO L225 Difference]: With dead ends: 83 [2020-10-05 23:12:23,304 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 23:12:23,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:12:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 23:12:23,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-05 23:12:23,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 23:12:23,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-05 23:12:23,307 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-05 23:12:23,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:23,307 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-05 23:12:23,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:12:23,308 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-05 23:12:23,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 23:12:23,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:23,308 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:23,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:23,517 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:23,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:23,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-05 23:12:23,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:23,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229843400] [2020-10-05 23:12:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:23,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229843400] [2020-10-05 23:12:23,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139290399] [2020-10-05 23:12:23,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:23,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:23,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:23,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:23,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:23,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:23,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 23:12:23,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715695555] [2020-10-05 23:12:23,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:23,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:23,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:23,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:23,651 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-05 23:12:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:23,916 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-05 23:12:23,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 23:12:23,917 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 23:12:23,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:23,918 INFO L225 Difference]: With dead ends: 62 [2020-10-05 23:12:23,919 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 23:12:23,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:12:23,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 23:12:23,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-05 23:12:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-05 23:12:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-05 23:12:23,921 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-05 23:12:23,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:23,922 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-05 23:12:23,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:23,922 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-05 23:12:23,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 23:12:23,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:23,922 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:24,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-05 23:12:24,133 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:24,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:24,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-05 23:12:24,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:24,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787450236] [2020-10-05 23:12:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:24,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787450236] [2020-10-05 23:12:24,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863402916] [2020-10-05 23:12:24,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:24,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 23:12:24,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:24,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 23:12:24,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:24,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:24,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:24,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 23:12:24,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904117799] [2020-10-05 23:12:24,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:24,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:24,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:24,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:24,270 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-05 23:12:24,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:24,545 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-05 23:12:24,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:24,545 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 23:12:24,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:24,546 INFO L225 Difference]: With dead ends: 68 [2020-10-05 23:12:24,546 INFO L226 Difference]: Without dead ends: 63 [2020-10-05 23:12:24,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:12:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-05 23:12:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-05 23:12:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 23:12:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-05 23:12:24,550 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-05 23:12:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:24,550 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-05 23:12:24,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-05 23:12:24,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:24,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:24,551 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:24,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-05 23:12:24,754 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:24,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:24,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-05 23:12:24,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:24,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458976686] [2020-10-05 23:12:24,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:24,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458976686] [2020-10-05 23:12:24,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335990134] [2020-10-05 23:12:24,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:24,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:24,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:24,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:24,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:24,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:24,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:24,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 23:12:24,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305841965] [2020-10-05 23:12:24,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:24,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:24,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:24,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:24,905 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-05 23:12:25,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:25,207 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-05 23:12:25,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:25,208 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 23:12:25,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:25,209 INFO L225 Difference]: With dead ends: 60 [2020-10-05 23:12:25,209 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 23:12:25,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:12:25,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 23:12:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-05 23:12:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 23:12:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-05 23:12:25,213 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-05 23:12:25,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:25,214 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-05 23:12:25,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:25,214 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-05 23:12:25,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:25,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:25,214 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:25,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:25,424 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:25,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:25,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-05 23:12:25,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:25,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159090590] [2020-10-05 23:12:25,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:25,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159090590] [2020-10-05 23:12:25,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266668150] [2020-10-05 23:12:25,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:25,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 23:12:25,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:25,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:25,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:25,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:25,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 23:12:25,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996856786] [2020-10-05 23:12:25,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:25,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:25,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:25,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:25,572 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-05 23:12:25,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:25,729 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-05 23:12:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 23:12:25,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 23:12:25,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:25,731 INFO L225 Difference]: With dead ends: 66 [2020-10-05 23:12:25,731 INFO L226 Difference]: Without dead ends: 60 [2020-10-05 23:12:25,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:12:25,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-05 23:12:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-05 23:12:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 23:12:25,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-05 23:12:25,735 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-05 23:12:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:25,735 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-05 23:12:25,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:25,735 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-05 23:12:25,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:25,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:25,736 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:25,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:25,939 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:25,939 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-05 23:12:25,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:25,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116975574] [2020-10-05 23:12:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:26,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116975574] [2020-10-05 23:12:26,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411498829] [2020-10-05 23:12:26,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:26,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 23:12:26,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:26,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:26,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:26,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:26,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:26,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 23:12:26,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309820144] [2020-10-05 23:12:26,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:26,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:26,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:26,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:26,104 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-05 23:12:26,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:26,280 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-05 23:12:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 23:12:26,281 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 23:12:26,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:26,281 INFO L225 Difference]: With dead ends: 74 [2020-10-05 23:12:26,281 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 23:12:26,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:12:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 23:12:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-05 23:12:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-05 23:12:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-05 23:12:26,284 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-05 23:12:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:26,284 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-05 23:12:26,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-05 23:12:26,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:26,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:26,286 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:26,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-05 23:12:26,494 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:26,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:26,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-05 23:12:26,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:26,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482062576] [2020-10-05 23:12:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:26,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482062576] [2020-10-05 23:12:26,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304390388] [2020-10-05 23:12:26,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:26,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:26,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:26,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:26,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 23:12:26,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293720061] [2020-10-05 23:12:26,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:26,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:26,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:26,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:26,625 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-05 23:12:26,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:26,816 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-05 23:12:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:26,817 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 23:12:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:26,817 INFO L225 Difference]: With dead ends: 75 [2020-10-05 23:12:26,818 INFO L226 Difference]: Without dead ends: 69 [2020-10-05 23:12:26,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:12:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-05 23:12:26,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-05 23:12:26,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 23:12:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-05 23:12:26,827 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-05 23:12:26,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:26,827 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-05 23:12:26,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:26,828 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-05 23:12:26,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:26,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:26,828 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:27,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:27,040 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:27,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:27,041 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-05 23:12:27,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:27,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818915018] [2020-10-05 23:12:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:27,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818915018] [2020-10-05 23:12:27,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406052100] [2020-10-05 23:12:27,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:27,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:27,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:27,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:27,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:27,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:27,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:27,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 23:12:27,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406103153] [2020-10-05 23:12:27,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:27,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:27,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:27,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:27,203 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-05 23:12:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:27,446 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-05 23:12:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 23:12:27,453 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 23:12:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:27,454 INFO L225 Difference]: With dead ends: 79 [2020-10-05 23:12:27,454 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 23:12:27,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:12:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 23:12:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-05 23:12:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 23:12:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-05 23:12:27,459 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-05 23:12:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:27,459 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-05 23:12:27,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:27,459 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-05 23:12:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:27,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:27,460 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:27,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-05 23:12:27,670 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:27,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:27,671 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-05 23:12:27,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:27,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780613120] [2020-10-05 23:12:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:27,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780613120] [2020-10-05 23:12:27,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824763259] [2020-10-05 23:12:27,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:27,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 23:12:27,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:27,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:27,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:27,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 23:12:27,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126076512] [2020-10-05 23:12:27,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:27,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:27,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:27,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:27,895 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-05 23:12:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:28,164 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-05 23:12:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 23:12:28,165 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 23:12:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:28,166 INFO L225 Difference]: With dead ends: 79 [2020-10-05 23:12:28,166 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 23:12:28,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:12:28,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 23:12:28,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-05 23:12:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-05 23:12:28,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-05 23:12:28,169 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-05 23:12:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:28,169 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-05 23:12:28,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-05 23:12:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:28,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:28,170 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:28,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:28,379 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:28,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:28,379 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-05 23:12:28,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:28,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175215038] [2020-10-05 23:12:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:28,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175215038] [2020-10-05 23:12:28,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537966360] [2020-10-05 23:12:28,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:28,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:28,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:28,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:28,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:28,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:28,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:28,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 23:12:28,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688604290] [2020-10-05 23:12:28,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:28,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:28,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:28,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:28,517 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-05 23:12:28,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:28,821 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-05 23:12:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 23:12:28,822 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 23:12:28,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:28,823 INFO L225 Difference]: With dead ends: 76 [2020-10-05 23:12:28,823 INFO L226 Difference]: Without dead ends: 70 [2020-10-05 23:12:28,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:12:28,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-05 23:12:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-05 23:12:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 23:12:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-05 23:12:28,826 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-05 23:12:28,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:28,826 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-05 23:12:28,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:28,827 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-05 23:12:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:28,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:28,827 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:29,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-05 23:12:29,029 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:29,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:29,029 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-05 23:12:29,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:29,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547235053] [2020-10-05 23:12:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:29,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547235053] [2020-10-05 23:12:29,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368635453] [2020-10-05 23:12:29,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:29,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 23:12:29,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:29,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:29,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:29,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:29,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 23:12:29,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672363830] [2020-10-05 23:12:29,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:29,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:29,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:29,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:29,171 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-05 23:12:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:29,465 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-05 23:12:29,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:12:29,465 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 23:12:29,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:29,466 INFO L225 Difference]: With dead ends: 96 [2020-10-05 23:12:29,466 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 23:12:29,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-05 23:12:29,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 23:12:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-05 23:12:29,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 23:12:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-05 23:12:29,470 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-05 23:12:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:29,470 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-05 23:12:29,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-05 23:12:29,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:29,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:29,471 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:29,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-05 23:12:29,672 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:29,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:29,673 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-05 23:12:29,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:29,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683330058] [2020-10-05 23:12:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:29,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683330058] [2020-10-05 23:12:29,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695530827] [2020-10-05 23:12:29,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:29,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 23:12:29,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:29,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:29,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:29,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:29,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:29,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 23:12:29,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567945161] [2020-10-05 23:12:29,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:29,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:29,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:29,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:29,862 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-05 23:12:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:30,204 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-05 23:12:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:12:30,205 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 23:12:30,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:30,206 INFO L225 Difference]: With dead ends: 77 [2020-10-05 23:12:30,206 INFO L226 Difference]: Without dead ends: 69 [2020-10-05 23:12:30,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-05 23:12:30,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-05 23:12:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-05 23:12:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-05 23:12:30,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-05 23:12:30,210 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-05 23:12:30,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:30,210 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-05 23:12:30,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:30,211 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-05 23:12:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:30,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:30,211 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:30,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-05 23:12:30,414 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:30,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:30,414 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-05 23:12:30,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:30,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906117665] [2020-10-05 23:12:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:30,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906117665] [2020-10-05 23:12:30,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777955540] [2020-10-05 23:12:30,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:30,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:30,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:30,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:30,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 23:12:30,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034328445] [2020-10-05 23:12:30,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:30,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:30,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:30,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:30,581 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-05 23:12:30,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:30,762 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-05 23:12:30,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 23:12:30,762 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 23:12:30,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:30,763 INFO L225 Difference]: With dead ends: 84 [2020-10-05 23:12:30,763 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 23:12:30,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:12:30,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 23:12:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-05 23:12:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 23:12:30,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 23:12:30,766 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-05 23:12:30,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:30,767 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 23:12:30,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:30,767 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 23:12:30,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:30,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:30,767 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:30,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-05 23:12:30,976 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:30,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:30,977 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-05 23:12:30,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:30,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401775782] [2020-10-05 23:12:30,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:31,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401775782] [2020-10-05 23:12:31,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77763993] [2020-10-05 23:12:31,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:31,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:31,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:31,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:31,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:31,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:31,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:31,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 23:12:31,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021757317] [2020-10-05 23:12:31,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:31,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:31,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:31,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:31,156 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-05 23:12:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:31,402 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-05 23:12:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 23:12:31,402 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 23:12:31,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:31,403 INFO L225 Difference]: With dead ends: 81 [2020-10-05 23:12:31,403 INFO L226 Difference]: Without dead ends: 75 [2020-10-05 23:12:31,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:12:31,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-05 23:12:31,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-05 23:12:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 23:12:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 23:12:31,407 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-05 23:12:31,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:31,407 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 23:12:31,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 23:12:31,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:31,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:31,407 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:31,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-05 23:12:31,608 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:31,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:31,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-05 23:12:31,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:31,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239423149] [2020-10-05 23:12:31,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:31,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239423149] [2020-10-05 23:12:31,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405327250] [2020-10-05 23:12:31,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:31,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 23:12:31,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:31,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:31,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:31,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:31,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 23:12:31,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513759034] [2020-10-05 23:12:31,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:31,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:31,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:31,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:31,776 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-05 23:12:31,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:31,987 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-05 23:12:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:31,987 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 23:12:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:31,988 INFO L225 Difference]: With dead ends: 78 [2020-10-05 23:12:31,988 INFO L226 Difference]: Without dead ends: 72 [2020-10-05 23:12:31,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:12:31,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-05 23:12:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-05 23:12:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 23:12:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 23:12:31,991 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-05 23:12:31,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:31,991 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 23:12:31,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:31,991 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 23:12:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:31,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:31,991 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:32,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-05 23:12:32,194 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:32,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:32,194 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-05 23:12:32,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:32,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743371587] [2020-10-05 23:12:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:32,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743371587] [2020-10-05 23:12:32,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504305664] [2020-10-05 23:12:32,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:32,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:32,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:32,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:32,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:32,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:32,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:32,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 23:12:32,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62504570] [2020-10-05 23:12:32,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:32,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:32,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:32,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:32,366 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-05 23:12:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:32,687 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-05 23:12:32,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 23:12:32,691 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 23:12:32,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:32,692 INFO L225 Difference]: With dead ends: 77 [2020-10-05 23:12:32,692 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 23:12:32,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-05 23:12:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 23:12:32,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-05 23:12:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 23:12:32,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 23:12:32,695 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-05 23:12:32,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:32,695 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 23:12:32,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:32,695 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 23:12:32,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:32,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:32,696 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:32,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-05 23:12:32,904 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:32,904 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-05 23:12:32,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:32,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020003271] [2020-10-05 23:12:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:32,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020003271] [2020-10-05 23:12:32,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519809345] [2020-10-05 23:12:32,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:33,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 23:12:33,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:33,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:33,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:33,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:33,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 23:12:33,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453681458] [2020-10-05 23:12:33,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:33,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:33,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:33,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:33,105 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-05 23:12:33,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:33,421 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-05 23:12:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 23:12:33,422 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 23:12:33,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:33,423 INFO L225 Difference]: With dead ends: 74 [2020-10-05 23:12:33,423 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 23:12:33,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:12:33,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 23:12:33,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-05 23:12:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 23:12:33,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 23:12:33,428 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-05 23:12:33,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:33,431 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 23:12:33,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 23:12:33,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:33,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:33,432 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:33,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:33,642 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:33,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:33,643 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-05 23:12:33,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:33,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088315917] [2020-10-05 23:12:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:33,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088315917] [2020-10-05 23:12:33,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414381831] [2020-10-05 23:12:33,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:33,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 23:12:33,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:33,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:33,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:33,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:33,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:33,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 23:12:33,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900806819] [2020-10-05 23:12:33,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:33,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:33,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:33,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:33,832 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-05 23:12:34,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:34,212 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-05 23:12:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:12:34,213 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 23:12:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:34,214 INFO L225 Difference]: With dead ends: 73 [2020-10-05 23:12:34,214 INFO L226 Difference]: Without dead ends: 67 [2020-10-05 23:12:34,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-05 23:12:34,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-05 23:12:34,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-05 23:12:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 23:12:34,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 23:12:34,218 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-05 23:12:34,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:34,218 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 23:12:34,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:34,218 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 23:12:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:34,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:34,219 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:34,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-05 23:12:34,427 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:34,427 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-05 23:12:34,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:34,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645628377] [2020-10-05 23:12:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:34,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645628377] [2020-10-05 23:12:34,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492654644] [2020-10-05 23:12:34,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:34,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:34,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:34,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:34,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 23:12:34,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68562586] [2020-10-05 23:12:34,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:34,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:34,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:34,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:34,592 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-05 23:12:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:34,892 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-05 23:12:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:12:34,893 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 23:12:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:34,894 INFO L225 Difference]: With dead ends: 89 [2020-10-05 23:12:34,894 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 23:12:34,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-05 23:12:34,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 23:12:34,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-05 23:12:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-05 23:12:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-05 23:12:34,898 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-05 23:12:34,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:34,898 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-05 23:12:34,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-05 23:12:34,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:34,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:34,899 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:35,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:35,102 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:35,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:35,102 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-05 23:12:35,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:35,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089863593] [2020-10-05 23:12:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:35,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089863593] [2020-10-05 23:12:35,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053271043] [2020-10-05 23:12:35,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:35,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:35,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:35,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:35,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:35,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:35,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 23:12:35,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422840279] [2020-10-05 23:12:35,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:35,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:35,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:35,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:35,250 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-05 23:12:35,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:35,623 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-05 23:12:35,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:12:35,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 23:12:35,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:35,624 INFO L225 Difference]: With dead ends: 68 [2020-10-05 23:12:35,624 INFO L226 Difference]: Without dead ends: 60 [2020-10-05 23:12:35,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-05 23:12:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-05 23:12:35,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-05 23:12:35,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-05 23:12:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-05 23:12:35,627 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-05 23:12:35,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:35,628 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-05 23:12:35,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-05 23:12:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:35,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:35,628 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:35,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-05 23:12:35,836 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:35,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:35,836 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-05 23:12:35,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:35,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317283978] [2020-10-05 23:12:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:35,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317283978] [2020-10-05 23:12:35,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708795186] [2020-10-05 23:12:35,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:35,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 23:12:35,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:35,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:35,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:35,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:36,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:36,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 23:12:36,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230313857] [2020-10-05 23:12:36,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:36,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:36,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:36,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:36,003 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-05 23:12:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:36,380 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-05 23:12:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:12:36,381 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 23:12:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:36,381 INFO L225 Difference]: With dead ends: 76 [2020-10-05 23:12:36,382 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 23:12:36,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-05 23:12:36,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 23:12:36,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-05 23:12:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 23:12:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-05 23:12:36,385 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-05 23:12:36,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:36,385 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-05 23:12:36,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:36,385 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-05 23:12:36,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:36,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:36,386 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:36,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:36,596 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:36,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:36,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-05 23:12:36,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:36,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620295178] [2020-10-05 23:12:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:36,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620295178] [2020-10-05 23:12:36,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212145702] [2020-10-05 23:12:36,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:36,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:36,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:36,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:36,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:36,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:36,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:36,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 23:12:36,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794167543] [2020-10-05 23:12:36,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:36,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:36,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:36,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:36,777 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-05 23:12:37,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:37,255 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-05 23:12:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:12:37,255 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 23:12:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:37,256 INFO L225 Difference]: With dead ends: 66 [2020-10-05 23:12:37,256 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 23:12:37,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-05 23:12:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 23:12:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-05 23:12:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 23:12:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-05 23:12:37,259 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-05 23:12:37,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:37,259 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-05 23:12:37,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:37,259 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-05 23:12:37,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:37,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:37,260 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:37,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-05 23:12:37,467 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:37,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:37,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-05 23:12:37,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:37,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991666839] [2020-10-05 23:12:37,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:37,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991666839] [2020-10-05 23:12:37,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050029884] [2020-10-05 23:12:37,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:37,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 23:12:37,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:37,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:37,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:37,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:37,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 23:12:37,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388707360] [2020-10-05 23:12:37,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:37,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:37,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:37,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:37,661 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-05 23:12:37,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:37,854 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-05 23:12:37,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 23:12:37,855 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 23:12:37,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:37,855 INFO L225 Difference]: With dead ends: 72 [2020-10-05 23:12:37,856 INFO L226 Difference]: Without dead ends: 66 [2020-10-05 23:12:37,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:12:37,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-05 23:12:37,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-05 23:12:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 23:12:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-05 23:12:37,859 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-05 23:12:37,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:37,859 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-05 23:12:37,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-05 23:12:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:37,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:37,860 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:38,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-05 23:12:38,071 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:38,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:38,071 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-05 23:12:38,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:38,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55676151] [2020-10-05 23:12:38,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:38,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55676151] [2020-10-05 23:12:38,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150485254] [2020-10-05 23:12:38,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:38,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 23:12:38,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:38,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:38,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:38,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:38,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:38,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 23:12:38,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891526099] [2020-10-05 23:12:38,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:38,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:38,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:38,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:38,260 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-05 23:12:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:38,487 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-05 23:12:38,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 23:12:38,489 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 23:12:38,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:38,490 INFO L225 Difference]: With dead ends: 82 [2020-10-05 23:12:38,490 INFO L226 Difference]: Without dead ends: 76 [2020-10-05 23:12:38,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:12:38,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-05 23:12:38,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-05 23:12:38,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 23:12:38,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-05 23:12:38,492 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-05 23:12:38,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:38,493 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-05 23:12:38,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:38,493 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-05 23:12:38,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:38,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:38,493 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:38,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-05 23:12:38,702 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:38,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:38,702 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-05 23:12:38,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:38,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458196779] [2020-10-05 23:12:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:38,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458196779] [2020-10-05 23:12:38,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407535767] [2020-10-05 23:12:38,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:38,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:38,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:38,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:38,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 23:12:38,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715351665] [2020-10-05 23:12:38,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:38,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:38,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:38,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:38,922 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-05 23:12:39,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:39,230 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-05 23:12:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 23:12:39,231 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 23:12:39,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:39,232 INFO L225 Difference]: With dead ends: 83 [2020-10-05 23:12:39,232 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 23:12:39,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:12:39,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 23:12:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-05 23:12:39,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-05 23:12:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-05 23:12:39,235 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-05 23:12:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:39,236 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-05 23:12:39,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:39,236 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-05 23:12:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:39,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:39,237 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:39,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-05 23:12:39,437 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:39,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:39,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-05 23:12:39,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:39,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542038013] [2020-10-05 23:12:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:39,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542038013] [2020-10-05 23:12:39,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141719746] [2020-10-05 23:12:39,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:39,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:39,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:39,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:39,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:39,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:39,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:39,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 23:12:39,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566875038] [2020-10-05 23:12:39,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:39,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:39,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:39,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:39,624 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-05 23:12:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:39,889 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-05 23:12:39,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 23:12:39,892 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 23:12:39,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:39,893 INFO L225 Difference]: With dead ends: 89 [2020-10-05 23:12:39,893 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 23:12:39,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-05 23:12:39,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 23:12:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-05 23:12:39,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 23:12:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-05 23:12:39,896 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-05 23:12:39,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:39,896 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-05 23:12:39,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-05 23:12:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:39,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:39,897 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:40,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:40,106 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:40,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:40,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-05 23:12:40,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:40,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972624845] [2020-10-05 23:12:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:40,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972624845] [2020-10-05 23:12:40,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798102719] [2020-10-05 23:12:40,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:40,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-05 23:12:40,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:40,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:40,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:40,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:40,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 23:12:40,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776879443] [2020-10-05 23:12:40,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:40,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:40,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:40,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:40,293 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-05 23:12:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:40,585 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-05 23:12:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:12:40,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 23:12:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:40,587 INFO L225 Difference]: With dead ends: 89 [2020-10-05 23:12:40,587 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 23:12:40,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-05 23:12:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 23:12:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-05 23:12:40,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 23:12:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 23:12:40,591 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-05 23:12:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:40,592 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 23:12:40,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:40,592 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 23:12:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:40,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:40,593 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:40,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:40,800 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:40,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-05 23:12:40,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:40,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100160876] [2020-10-05 23:12:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:40,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100160876] [2020-10-05 23:12:40,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295245090] [2020-10-05 23:12:40,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:40,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:40,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:40,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:40,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:40,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:40,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:40,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 23:12:40,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906202552] [2020-10-05 23:12:40,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:40,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:40,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:40,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:40,974 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-05 23:12:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:41,318 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-05 23:12:41,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:12:41,319 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 23:12:41,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:41,320 INFO L225 Difference]: With dead ends: 86 [2020-10-05 23:12:41,320 INFO L226 Difference]: Without dead ends: 80 [2020-10-05 23:12:41,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-05 23:12:41,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-05 23:12:41,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-05 23:12:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 23:12:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 23:12:41,324 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-05 23:12:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:41,324 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 23:12:41,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:41,325 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 23:12:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:41,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:41,325 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:41,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-05 23:12:41,533 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:41,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-05 23:12:41,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:41,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669875391] [2020-10-05 23:12:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:41,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669875391] [2020-10-05 23:12:41,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792018243] [2020-10-05 23:12:41,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:41,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 23:12:41,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:41,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:41,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:41,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:41,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 23:12:41,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234109858] [2020-10-05 23:12:41,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:41,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:41,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:41,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:41,716 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-05 23:12:42,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:42,038 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-05 23:12:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:12:42,039 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 23:12:42,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:42,039 INFO L225 Difference]: With dead ends: 87 [2020-10-05 23:12:42,039 INFO L226 Difference]: Without dead ends: 81 [2020-10-05 23:12:42,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-05 23:12:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-05 23:12:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-05 23:12:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-05 23:12:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-05 23:12:42,042 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-05 23:12:42,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:42,043 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-05 23:12:42,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-05 23:12:42,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:42,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:42,043 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:42,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:42,244 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:42,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:42,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-05 23:12:42,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:42,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711208731] [2020-10-05 23:12:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:42,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711208731] [2020-10-05 23:12:42,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254619141] [2020-10-05 23:12:42,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:42,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 23:12:42,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:42,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:42,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:42,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:42,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:42,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 23:12:42,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746963674] [2020-10-05 23:12:42,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:42,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:42,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:42,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:42,411 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-05 23:12:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:42,842 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-05 23:12:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:12:42,843 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 23:12:42,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:42,844 INFO L225 Difference]: With dead ends: 84 [2020-10-05 23:12:42,844 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 23:12:42,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-05 23:12:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 23:12:42,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-05 23:12:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 23:12:42,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-05 23:12:42,847 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-05 23:12:42,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:42,848 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-05 23:12:42,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:42,848 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-05 23:12:42,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:42,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:42,849 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:43,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-05 23:12:43,060 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:43,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:43,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-05 23:12:43,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:43,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709850400] [2020-10-05 23:12:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:43,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709850400] [2020-10-05 23:12:43,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102178136] [2020-10-05 23:12:43,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:43,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:43,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:43,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:43,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 23:12:43,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766458016] [2020-10-05 23:12:43,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:43,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:43,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:43,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:43,202 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-05 23:12:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:43,571 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-05 23:12:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:12:43,572 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 23:12:43,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:43,573 INFO L225 Difference]: With dead ends: 104 [2020-10-05 23:12:43,573 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 23:12:43,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-05 23:12:43,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 23:12:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-05 23:12:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 23:12:43,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-05 23:12:43,576 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-05 23:12:43,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:43,577 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-05 23:12:43,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-05 23:12:43,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:43,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:43,577 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:43,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-05 23:12:43,780 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:43,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:43,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-05 23:12:43,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:43,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514865072] [2020-10-05 23:12:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:43,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514865072] [2020-10-05 23:12:43,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960636194] [2020-10-05 23:12:43,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:43,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:43,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:43,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:43,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:43,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:43,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 23:12:43,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673223932] [2020-10-05 23:12:43,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:43,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:43,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:43,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:43,987 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-05 23:12:44,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:44,563 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-05 23:12:44,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:12:44,563 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 23:12:44,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:44,564 INFO L225 Difference]: With dead ends: 85 [2020-10-05 23:12:44,564 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 23:12:44,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 23:12:44,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 23:12:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-05 23:12:44,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-05 23:12:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-05 23:12:44,567 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-05 23:12:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:44,567 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-05 23:12:44,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-05 23:12:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:44,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:44,568 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:44,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-05 23:12:44,776 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:44,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:44,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-05 23:12:44,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:44,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54613932] [2020-10-05 23:12:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:44,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54613932] [2020-10-05 23:12:44,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846713017] [2020-10-05 23:12:44,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:44,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-05 23:12:44,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:44,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:44,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:44,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:44,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 23:12:44,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119851860] [2020-10-05 23:12:44,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:44,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:44,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:44,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:44,990 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-05 23:12:45,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:45,211 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-05 23:12:45,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:45,212 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 23:12:45,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:45,213 INFO L225 Difference]: With dead ends: 94 [2020-10-05 23:12:45,213 INFO L226 Difference]: Without dead ends: 88 [2020-10-05 23:12:45,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:12:45,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-05 23:12:45,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-05 23:12:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 23:12:45,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 23:12:45,216 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 23:12:45,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:45,217 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 23:12:45,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 23:12:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:45,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:45,217 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:45,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-05 23:12:45,418 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:45,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:45,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-05 23:12:45,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:45,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186716335] [2020-10-05 23:12:45,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:45,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186716335] [2020-10-05 23:12:45,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475209040] [2020-10-05 23:12:45,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:45,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:45,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:45,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:45,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:45,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:45,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:45,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 23:12:45,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553951993] [2020-10-05 23:12:45,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:45,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:45,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:45,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:45,616 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 23:12:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:45,922 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-05 23:12:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 23:12:45,922 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 23:12:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:45,923 INFO L225 Difference]: With dead ends: 91 [2020-10-05 23:12:45,923 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 23:12:45,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-05 23:12:45,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 23:12:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-05 23:12:45,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:12:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 23:12:45,926 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 23:12:45,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:45,926 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 23:12:45,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:45,926 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 23:12:45,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:45,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:45,927 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:46,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-05 23:12:46,134 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-05 23:12:46,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:46,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839004023] [2020-10-05 23:12:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:46,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839004023] [2020-10-05 23:12:46,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72692611] [2020-10-05 23:12:46,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:46,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 23:12:46,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:46,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:46,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:46,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:46,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 23:12:46,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797069540] [2020-10-05 23:12:46,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:46,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:46,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:46,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:46,311 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 23:12:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:46,589 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-05 23:12:46,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 23:12:46,590 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 23:12:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:46,591 INFO L225 Difference]: With dead ends: 88 [2020-10-05 23:12:46,591 INFO L226 Difference]: Without dead ends: 82 [2020-10-05 23:12:46,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-05 23:12:46,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-05 23:12:46,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-05 23:12:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 23:12:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 23:12:46,595 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 23:12:46,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:46,595 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 23:12:46,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 23:12:46,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:46,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:46,596 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:46,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:46,805 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:46,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:46,805 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-05 23:12:46,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:46,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680479141] [2020-10-05 23:12:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:46,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680479141] [2020-10-05 23:12:46,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455859849] [2020-10-05 23:12:46,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:46,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 23:12:46,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:47,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:47,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:47,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:47,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:47,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 23:12:47,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228303567] [2020-10-05 23:12:47,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:47,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:47,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:47,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:47,069 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 23:12:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:47,507 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-05 23:12:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:12:47,507 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 23:12:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:47,508 INFO L225 Difference]: With dead ends: 87 [2020-10-05 23:12:47,509 INFO L226 Difference]: Without dead ends: 81 [2020-10-05 23:12:47,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-05 23:12:47,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-05 23:12:47,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-05 23:12:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:12:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 23:12:47,512 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 23:12:47,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:47,513 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 23:12:47,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:47,513 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 23:12:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:47,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:47,513 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:47,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:47,723 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:47,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:47,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-05 23:12:47,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:47,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680818703] [2020-10-05 23:12:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:47,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680818703] [2020-10-05 23:12:47,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506506846] [2020-10-05 23:12:47,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:47,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:47,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:47,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:47,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 23:12:47,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970101166] [2020-10-05 23:12:47,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:47,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:47,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:47,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:47,893 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 23:12:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:48,217 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-05 23:12:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:12:48,217 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 23:12:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:48,218 INFO L225 Difference]: With dead ends: 84 [2020-10-05 23:12:48,219 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 23:12:48,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-05 23:12:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 23:12:48,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-05 23:12:48,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 23:12:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 23:12:48,222 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 23:12:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:48,222 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 23:12:48,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 23:12:48,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:48,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:48,223 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:48,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-05 23:12:48,426 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:48,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:48,426 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-05 23:12:48,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:48,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677804513] [2020-10-05 23:12:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:48,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677804513] [2020-10-05 23:12:48,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625350050] [2020-10-05 23:12:48,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:48,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:48,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:48,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:48,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:48,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:48,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:48,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 23:12:48,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474070493] [2020-10-05 23:12:48,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:48,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:48,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:48,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:48,619 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 23:12:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:49,051 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-05 23:12:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:12:49,051 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 23:12:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:49,052 INFO L225 Difference]: With dead ends: 83 [2020-10-05 23:12:49,053 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 23:12:49,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-05 23:12:49,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 23:12:49,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-05 23:12:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:12:49,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 23:12:49,056 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 23:12:49,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:49,056 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 23:12:49,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:49,056 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 23:12:49,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:49,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:49,057 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:49,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:49,261 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-05 23:12:49,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:49,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450685093] [2020-10-05 23:12:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:49,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450685093] [2020-10-05 23:12:49,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714019091] [2020-10-05 23:12:49,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:49,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-05 23:12:49,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:49,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:49,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:49,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:49,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 23:12:49,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354289146] [2020-10-05 23:12:49,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:49,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:49,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:49,435 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 23:12:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:49,808 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-05 23:12:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:12:49,808 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 23:12:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:49,809 INFO L225 Difference]: With dead ends: 80 [2020-10-05 23:12:49,809 INFO L226 Difference]: Without dead ends: 74 [2020-10-05 23:12:49,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-05 23:12:49,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-05 23:12:49,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-05 23:12:49,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 23:12:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 23:12:49,813 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 23:12:49,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:49,813 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 23:12:49,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:49,814 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 23:12:49,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:49,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:49,814 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:50,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-05 23:12:50,023 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:50,023 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-05 23:12:50,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:50,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087020629] [2020-10-05 23:12:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:50,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087020629] [2020-10-05 23:12:50,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995133414] [2020-10-05 23:12:50,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:50,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:50,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:50,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:50,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:50,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:50,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:50,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 23:12:50,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267480202] [2020-10-05 23:12:50,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:50,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:50,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:50,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:50,206 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 23:12:50,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:50,794 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-05 23:12:50,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:12:50,795 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 23:12:50,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:50,795 INFO L225 Difference]: With dead ends: 79 [2020-10-05 23:12:50,795 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 23:12:50,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 23:12:50,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 23:12:50,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-05 23:12:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:12:50,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 23:12:50,798 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 23:12:50,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:50,799 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 23:12:50,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:50,799 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 23:12:50,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:50,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:50,799 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:51,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:51,000 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:51,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:51,001 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-05 23:12:51,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:51,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179216137] [2020-10-05 23:12:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:51,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179216137] [2020-10-05 23:12:51,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140738247] [2020-10-05 23:12:51,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:51,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 23:12:51,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:51,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:51,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:51,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:51,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 23:12:51,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570129734] [2020-10-05 23:12:51,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:51,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:51,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:51,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:51,172 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 23:12:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:51,580 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-05 23:12:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:12:51,580 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 23:12:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:51,581 INFO L225 Difference]: With dead ends: 95 [2020-10-05 23:12:51,582 INFO L226 Difference]: Without dead ends: 89 [2020-10-05 23:12:51,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 23:12:51,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-05 23:12:51,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-05 23:12:51,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 23:12:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-05 23:12:51,584 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-05 23:12:51,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:51,584 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-05 23:12:51,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-05 23:12:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:51,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:51,585 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:51,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-05 23:12:51,786 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:51,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:51,787 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-05 23:12:51,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:51,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245516756] [2020-10-05 23:12:51,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:51,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245516756] [2020-10-05 23:12:51,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309992079] [2020-10-05 23:12:51,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:51,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 23:12:51,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:51,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:51,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:51,949 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:51,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:51,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 23:12:51,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856336363] [2020-10-05 23:12:51,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:51,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:51,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:51,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:51,962 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-05 23:12:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:52,509 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-05 23:12:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:12:52,509 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 23:12:52,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:52,510 INFO L225 Difference]: With dead ends: 76 [2020-10-05 23:12:52,511 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 23:12:52,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:12:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 23:12:52,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-05 23:12:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-05 23:12:52,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-05 23:12:52,513 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-05 23:12:52,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:52,513 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-05 23:12:52,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:52,514 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-05 23:12:52,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:52,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:52,514 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:52,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:52,722 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:52,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:52,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-05 23:12:52,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:52,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588694308] [2020-10-05 23:12:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:52,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588694308] [2020-10-05 23:12:52,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888041075] [2020-10-05 23:12:52,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:52,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:52,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:52,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:52,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:52,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 23:12:52,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8631953] [2020-10-05 23:12:52,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:52,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:52,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:52,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:52,896 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-05 23:12:53,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:53,399 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-05 23:12:53,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:12:53,399 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 23:12:53,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:53,400 INFO L225 Difference]: With dead ends: 84 [2020-10-05 23:12:53,400 INFO L226 Difference]: Without dead ends: 79 [2020-10-05 23:12:53,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:12:53,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-05 23:12:53,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-05 23:12:53,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 23:12:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-05 23:12:53,404 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-05 23:12:53,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:53,404 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-05 23:12:53,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:53,404 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-05 23:12:53,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:53,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:53,405 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:53,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-05 23:12:53,609 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:53,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:53,610 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-05 23:12:53,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:53,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963964311] [2020-10-05 23:12:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:53,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963964311] [2020-10-05 23:12:53,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296327070] [2020-10-05 23:12:53,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:53,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:53,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:53,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:12:53,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:53,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:53,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:53,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 23:12:53,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286858220] [2020-10-05 23:12:53,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:12:53,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:53,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:12:53,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:12:53,798 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-05 23:12:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:54,353 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-05 23:12:54,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:12:54,354 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 23:12:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:54,355 INFO L225 Difference]: With dead ends: 72 [2020-10-05 23:12:54,355 INFO L226 Difference]: Without dead ends: 67 [2020-10-05 23:12:54,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:12:54,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-05 23:12:54,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-05 23:12:54,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 23:12:54,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-05 23:12:54,358 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-05 23:12:54,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:54,360 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-05 23:12:54,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:12:54,360 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-05 23:12:54,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:54,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:54,361 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:54,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-05 23:12:54,569 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:54,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:54,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-05 23:12:54,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:54,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113237928] [2020-10-05 23:12:54,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:54,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113237928] [2020-10-05 23:12:54,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030584767] [2020-10-05 23:12:54,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:54,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 23:12:54,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:54,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:12:54,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:54,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:54,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 23:12:54,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843039551] [2020-10-05 23:12:54,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:54,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:54,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:54,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:54,800 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-05 23:12:55,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:55,032 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-05 23:12:55,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:55,033 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 23:12:55,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:55,034 INFO L225 Difference]: With dead ends: 78 [2020-10-05 23:12:55,034 INFO L226 Difference]: Without dead ends: 72 [2020-10-05 23:12:55,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-05 23:12:55,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-05 23:12:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-05 23:12:55,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 23:12:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-05 23:12:55,037 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-05 23:12:55,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:55,037 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-05 23:12:55,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-05 23:12:55,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:55,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:55,038 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:55,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:55,247 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:55,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:55,247 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-05 23:12:55,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:55,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229125005] [2020-10-05 23:12:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:55,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229125005] [2020-10-05 23:12:55,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499826663] [2020-10-05 23:12:55,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:55,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:55,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:55,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:12:55,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:55,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:55,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:55,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 23:12:55,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004098532] [2020-10-05 23:12:55,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:12:55,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:55,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:12:55,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:12:55,464 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-05 23:12:55,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:55,739 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-05 23:12:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 23:12:55,740 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 23:12:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:55,741 INFO L225 Difference]: With dead ends: 90 [2020-10-05 23:12:55,741 INFO L226 Difference]: Without dead ends: 84 [2020-10-05 23:12:55,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-05 23:12:55,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-05 23:12:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-05 23:12:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 23:12:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-05 23:12:55,744 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-05 23:12:55,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:55,745 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-05 23:12:55,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:12:55,745 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-05 23:12:55,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:55,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:55,745 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:55,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:55,955 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:55,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:55,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-05 23:12:55,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:55,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315165446] [2020-10-05 23:12:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:56,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315165446] [2020-10-05 23:12:56,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355540983] [2020-10-05 23:12:56,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:56,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-05 23:12:56,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:56,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:12:56,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:56,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:56,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 23:12:56,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718012243] [2020-10-05 23:12:56,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:56,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:56,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:56,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:56,152 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-05 23:12:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:56,464 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-05 23:12:56,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:12:56,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 23:12:56,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:56,465 INFO L225 Difference]: With dead ends: 91 [2020-10-05 23:12:56,466 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 23:12:56,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-05 23:12:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 23:12:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-05 23:12:56,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-05 23:12:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-05 23:12:56,468 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-05 23:12:56,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:56,468 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-05 23:12:56,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:56,469 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-05 23:12:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:56,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:56,469 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:56,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:56,677 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:56,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:56,677 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-05 23:12:56,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:56,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674831341] [2020-10-05 23:12:56,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:56,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674831341] [2020-10-05 23:12:56,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202438963] [2020-10-05 23:12:56,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:56,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-05 23:12:56,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:56,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:12:56,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:56,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:56,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:56,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 23:12:56,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107184841] [2020-10-05 23:12:56,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:12:56,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:56,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:12:56,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:12:56,911 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-05 23:12:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:57,262 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-05 23:12:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:12:57,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 23:12:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:57,264 INFO L225 Difference]: With dead ends: 99 [2020-10-05 23:12:57,264 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 23:12:57,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-05 23:12:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 23:12:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-05 23:12:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 23:12:57,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-05 23:12:57,267 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-05 23:12:57,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:57,267 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-05 23:12:57,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:12:57,267 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-05 23:12:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:57,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:57,268 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:57,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:57,468 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:57,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:57,469 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-05 23:12:57,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:57,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955977467] [2020-10-05 23:12:57,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:57,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955977467] [2020-10-05 23:12:57,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554971318] [2020-10-05 23:12:57,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:57,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:12:57,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:57,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:57,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 23:12:57,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611921702] [2020-10-05 23:12:57,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:57,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:57,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:57,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:57,657 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-05 23:12:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:58,024 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-05 23:12:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:12:58,025 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 23:12:58,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:58,026 INFO L225 Difference]: With dead ends: 99 [2020-10-05 23:12:58,026 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 23:12:58,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-05 23:12:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 23:12:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-05 23:12:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-05 23:12:58,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-05 23:12:58,029 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-05 23:12:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:58,029 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-05 23:12:58,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-05 23:12:58,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:58,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:58,030 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:58,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-05 23:12:58,231 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:58,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:58,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-05 23:12:58,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:58,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171140879] [2020-10-05 23:12:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:58,352 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:58,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171140879] [2020-10-05 23:12:58,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924923570] [2020-10-05 23:12:58,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:58,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:58,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:58,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:12:58,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:58,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:58,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:58,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 23:12:58,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68493467] [2020-10-05 23:12:58,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:12:58,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:58,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:12:58,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:12:58,427 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-05 23:12:58,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:58,863 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-05 23:12:58,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:12:58,863 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 23:12:58,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:58,864 INFO L225 Difference]: With dead ends: 96 [2020-10-05 23:12:58,865 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 23:12:58,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 23:12:58,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 23:12:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-05 23:12:58,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-05 23:12:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-05 23:12:58,868 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-05 23:12:58,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:58,868 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-05 23:12:58,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:12:58,868 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-05 23:12:58,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:58,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:58,869 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:59,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:59,070 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:59,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:59,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-05 23:12:59,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:59,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173710345] [2020-10-05 23:12:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:59,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173710345] [2020-10-05 23:12:59,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631229097] [2020-10-05 23:12:59,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:12:59,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 23:12:59,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:59,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:12:59,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:59,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:59,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 23:12:59,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941837290] [2020-10-05 23:12:59,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:59,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:59,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:59,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:59,243 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-05 23:12:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:59,647 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-05 23:12:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:12:59,648 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 23:12:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:59,649 INFO L225 Difference]: With dead ends: 97 [2020-10-05 23:12:59,649 INFO L226 Difference]: Without dead ends: 91 [2020-10-05 23:12:59,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 23:12:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-05 23:12:59,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-05 23:12:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 23:12:59,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 23:12:59,652 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-05 23:12:59,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:59,652 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 23:12:59,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 23:12:59,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:59,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:59,653 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:59,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-05 23:12:59,853 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:59,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:59,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-05 23:12:59,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:59,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083376691] [2020-10-05 23:12:59,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:59,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083376691] [2020-10-05 23:12:59,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526205637] [2020-10-05 23:12:59,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:00,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:00,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:00,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:13:00,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:00,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:00,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:00,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 23:13:00,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16610762] [2020-10-05 23:13:00,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:00,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:00,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:00,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:00,061 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-05 23:13:00,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:00,724 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-05 23:13:00,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:13:00,725 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 23:13:00,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:00,726 INFO L225 Difference]: With dead ends: 94 [2020-10-05 23:13:00,726 INFO L226 Difference]: Without dead ends: 88 [2020-10-05 23:13:00,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 23:13:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-05 23:13:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-05 23:13:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:13:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 23:13:00,730 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-05 23:13:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:00,731 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 23:13:00,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 23:13:00,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:13:00,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:00,732 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:00,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:00,943 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:00,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:00,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-05 23:13:00,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:00,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192395387] [2020-10-05 23:13:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:01,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192395387] [2020-10-05 23:13:01,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424124912] [2020-10-05 23:13:01,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:01,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-05 23:13:01,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:01,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:13:01,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:01,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:01,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 23:13:01,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107970149] [2020-10-05 23:13:01,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:13:01,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:01,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:13:01,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:13:01,216 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-05 23:13:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:01,829 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-05 23:13:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:13:01,830 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 23:13:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:01,832 INFO L225 Difference]: With dead ends: 95 [2020-10-05 23:13:01,832 INFO L226 Difference]: Without dead ends: 89 [2020-10-05 23:13:01,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:13:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-05 23:13:01,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-05 23:13:01,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-05 23:13:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-05 23:13:01,836 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-05 23:13:01,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:01,837 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-05 23:13:01,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:13:01,837 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-05 23:13:01,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:13:01,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:01,838 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:02,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-05 23:13:02,049 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:02,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:02,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-05 23:13:02,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:02,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606686200] [2020-10-05 23:13:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:02,178 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:02,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606686200] [2020-10-05 23:13:02,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142568253] [2020-10-05 23:13:02,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:02,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-05 23:13:02,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:02,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:13:02,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:02,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:02,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:02,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 23:13:02,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077746259] [2020-10-05 23:13:02,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:02,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:02,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:02,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:02,264 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-05 23:13:02,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:02,863 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-05 23:13:02,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:13:02,864 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 23:13:02,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:02,865 INFO L225 Difference]: With dead ends: 92 [2020-10-05 23:13:02,866 INFO L226 Difference]: Without dead ends: 86 [2020-10-05 23:13:02,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:13:02,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-05 23:13:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-05 23:13:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 23:13:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-05 23:13:02,870 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-05 23:13:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:02,870 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-05 23:13:02,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-05 23:13:02,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:13:02,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:02,871 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:03,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:03,081 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:03,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:03,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-05 23:13:03,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:03,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928036283] [2020-10-05 23:13:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:03,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928036283] [2020-10-05 23:13:03,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476806092] [2020-10-05 23:13:03,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:03,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:13:03,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:03,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:03,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 23:13:03,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605688564] [2020-10-05 23:13:03,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:13:03,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:03,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:13:03,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:13:03,317 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-05 23:13:03,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:03,793 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-05 23:13:03,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:13:03,793 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 23:13:03,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:03,794 INFO L225 Difference]: With dead ends: 112 [2020-10-05 23:13:03,795 INFO L226 Difference]: Without dead ends: 106 [2020-10-05 23:13:03,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 23:13:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-05 23:13:03,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-05 23:13:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 23:13:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-05 23:13:03,798 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-05 23:13:03,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:03,798 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-05 23:13:03,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:13:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-05 23:13:03,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:13:03,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:03,798 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:03,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:03,999 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:04,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-05 23:13:04,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:04,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555349156] [2020-10-05 23:13:04,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:04,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555349156] [2020-10-05 23:13:04,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993022474] [2020-10-05 23:13:04,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:04,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:04,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:04,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:04,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:04,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:04,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 23:13:04,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409482391] [2020-10-05 23:13:04,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:04,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:04,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:04,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:04,195 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-05 23:13:05,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:05,003 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-05 23:13:05,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:13:05,004 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 23:13:05,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:05,005 INFO L225 Difference]: With dead ends: 93 [2020-10-05 23:13:05,006 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 23:13:05,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 23:13:05,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 23:13:05,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-05 23:13:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-05 23:13:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-05 23:13:05,010 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-05 23:13:05,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:05,010 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-05 23:13:05,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-05 23:13:05,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:05,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:05,012 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:05,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:05,223 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:05,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:05,224 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-05 23:13:05,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:05,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624962246] [2020-10-05 23:13:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:05,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624962246] [2020-10-05 23:13:05,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865511473] [2020-10-05 23:13:05,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:05,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 23:13:05,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:05,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:05,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:05,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:05,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 23:13:05,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945384904] [2020-10-05 23:13:05,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:05,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:05,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:05,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:05,568 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-05 23:13:05,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:05,973 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-05 23:13:05,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 23:13:05,974 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 23:13:05,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:05,975 INFO L225 Difference]: With dead ends: 104 [2020-10-05 23:13:05,975 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 23:13:05,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-05 23:13:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 23:13:05,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-05 23:13:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 23:13:05,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 23:13:05,982 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-05 23:13:05,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:05,982 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 23:13:05,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:05,983 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 23:13:05,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:05,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:05,984 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:06,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:06,194 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:06,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:06,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-05 23:13:06,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:06,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980072278] [2020-10-05 23:13:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:06,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980072278] [2020-10-05 23:13:06,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004495645] [2020-10-05 23:13:06,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:06,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:06,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:06,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:06,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:06,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:06,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:06,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 23:13:06,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184868126] [2020-10-05 23:13:06,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:06,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:06,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:06,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:06,435 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-05 23:13:06,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:06,812 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-05 23:13:06,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:13:06,812 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 23:13:06,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:06,813 INFO L225 Difference]: With dead ends: 101 [2020-10-05 23:13:06,814 INFO L226 Difference]: Without dead ends: 95 [2020-10-05 23:13:06,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-05 23:13:06,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-05 23:13:06,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-05 23:13:06,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:13:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 23:13:06,817 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-05 23:13:06,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:06,817 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 23:13:06,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:06,818 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 23:13:06,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:06,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:06,818 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:07,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:07,027 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:07,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:07,027 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-05 23:13:07,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:07,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424225126] [2020-10-05 23:13:07,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:07,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424225126] [2020-10-05 23:13:07,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690516127] [2020-10-05 23:13:07,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:07,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-05 23:13:07,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:07,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:07,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:07,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:07,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 23:13:07,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697469979] [2020-10-05 23:13:07,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:07,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:07,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:07,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:07,257 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-05 23:13:07,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:07,641 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-05 23:13:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:13:07,642 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 23:13:07,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:07,643 INFO L225 Difference]: With dead ends: 98 [2020-10-05 23:13:07,644 INFO L226 Difference]: Without dead ends: 92 [2020-10-05 23:13:07,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-05 23:13:07,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-05 23:13:07,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-05 23:13:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 23:13:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 23:13:07,650 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-05 23:13:07,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:07,651 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 23:13:07,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 23:13:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:07,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:07,653 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:07,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:07,865 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:07,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:07,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-05 23:13:07,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:07,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033712090] [2020-10-05 23:13:07,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:08,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033712090] [2020-10-05 23:13:08,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040940069] [2020-10-05 23:13:08,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:08,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-05 23:13:08,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:08,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:08,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:08,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:08,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:08,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 23:13:08,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725655657] [2020-10-05 23:13:08,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:08,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:08,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:08,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:08,207 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-05 23:13:08,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:08,660 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-05 23:13:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:13:08,661 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 23:13:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:08,662 INFO L225 Difference]: With dead ends: 97 [2020-10-05 23:13:08,662 INFO L226 Difference]: Without dead ends: 91 [2020-10-05 23:13:08,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 23:13:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-05 23:13:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-05 23:13:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:13:08,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 23:13:08,664 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-05 23:13:08,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:08,665 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 23:13:08,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:08,665 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 23:13:08,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:08,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:08,666 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:08,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:08,874 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:08,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:08,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-05 23:13:08,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:08,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990289185] [2020-10-05 23:13:08,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:09,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990289185] [2020-10-05 23:13:09,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152423109] [2020-10-05 23:13:09,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:09,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:09,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:09,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:09,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 23:13:09,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543868515] [2020-10-05 23:13:09,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:09,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:09,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:09,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:09,072 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-05 23:13:09,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:09,475 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-05 23:13:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:13:09,475 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 23:13:09,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:09,476 INFO L225 Difference]: With dead ends: 94 [2020-10-05 23:13:09,477 INFO L226 Difference]: Without dead ends: 88 [2020-10-05 23:13:09,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 23:13:09,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-05 23:13:09,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-05 23:13:09,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 23:13:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 23:13:09,480 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-05 23:13:09,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:09,480 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 23:13:09,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:09,480 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 23:13:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:09,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:09,481 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:09,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-05 23:13:09,689 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:09,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:09,689 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-05 23:13:09,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:09,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187018614] [2020-10-05 23:13:09,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:09,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187018614] [2020-10-05 23:13:09,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738198117] [2020-10-05 23:13:09,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:09,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:09,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:09,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:09,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:09,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:09,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:09,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 23:13:09,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620561602] [2020-10-05 23:13:09,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:09,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:09,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:09,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:09,906 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-05 23:13:10,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:10,431 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-05 23:13:10,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:13:10,432 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 23:13:10,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:10,433 INFO L225 Difference]: With dead ends: 93 [2020-10-05 23:13:10,433 INFO L226 Difference]: Without dead ends: 87 [2020-10-05 23:13:10,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:13:10,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-05 23:13:10,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-05 23:13:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:13:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 23:13:10,436 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-05 23:13:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:10,437 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 23:13:10,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 23:13:10,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:10,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:10,438 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:10,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:10,638 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:10,639 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-05 23:13:10,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:10,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365488972] [2020-10-05 23:13:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:10,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365488972] [2020-10-05 23:13:10,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995114262] [2020-10-05 23:13:10,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:10,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 23:13:10,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:10,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:10,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:10,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:10,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 23:13:10,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527200628] [2020-10-05 23:13:10,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:10,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:10,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:10,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:10,855 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-05 23:13:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:11,269 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-05 23:13:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:13:11,269 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 23:13:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:11,270 INFO L225 Difference]: With dead ends: 90 [2020-10-05 23:13:11,270 INFO L226 Difference]: Without dead ends: 84 [2020-10-05 23:13:11,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 23:13:11,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-05 23:13:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-05 23:13:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 23:13:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 23:13:11,273 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-05 23:13:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:11,273 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 23:13:11,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 23:13:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:11,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:11,274 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:11,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-05 23:13:11,475 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:11,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:11,475 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-05 23:13:11,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:11,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327228476] [2020-10-05 23:13:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:11,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327228476] [2020-10-05 23:13:11,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435593326] [2020-10-05 23:13:11,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:11,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:11,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:11,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:11,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:11,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:11,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:11,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 23:13:11,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160147197] [2020-10-05 23:13:11,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:11,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:11,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:11,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:11,691 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-05 23:13:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:12,294 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-05 23:13:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:13:12,295 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 23:13:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:12,296 INFO L225 Difference]: With dead ends: 89 [2020-10-05 23:13:12,296 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 23:13:12,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 23:13:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 23:13:12,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-05 23:13:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:13:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 23:13:12,299 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-05 23:13:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:12,299 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 23:13:12,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 23:13:12,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:12,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:12,300 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:12,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:12,501 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-05 23:13:12,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:12,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962089194] [2020-10-05 23:13:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:12,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962089194] [2020-10-05 23:13:12,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506423916] [2020-10-05 23:13:12,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:12,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-05 23:13:12,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:12,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:12,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:12,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:12,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 23:13:12,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297471241] [2020-10-05 23:13:12,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:12,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:12,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:12,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:12,688 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-05 23:13:13,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:13,169 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-05 23:13:13,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:13:13,169 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 23:13:13,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:13,170 INFO L225 Difference]: With dead ends: 86 [2020-10-05 23:13:13,170 INFO L226 Difference]: Without dead ends: 80 [2020-10-05 23:13:13,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:13:13,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-05 23:13:13,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-05 23:13:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 23:13:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 23:13:13,175 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-05 23:13:13,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:13,175 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 23:13:13,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:13,175 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 23:13:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:13,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:13,176 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:13,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:13,384 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:13,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:13,384 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-05 23:13:13,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:13,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249225772] [2020-10-05 23:13:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:13,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:13,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249225772] [2020-10-05 23:13:13,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458927677] [2020-10-05 23:13:13,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:13,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-05 23:13:13,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:13,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:13,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:13,575 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:13,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:13,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 23:13:13,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493382660] [2020-10-05 23:13:13,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:13,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:13,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:13,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:13,590 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-05 23:13:14,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:14,279 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-05 23:13:14,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:13:14,280 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 23:13:14,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:14,280 INFO L225 Difference]: With dead ends: 85 [2020-10-05 23:13:14,281 INFO L226 Difference]: Without dead ends: 79 [2020-10-05 23:13:14,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 23:13:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-05 23:13:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-05 23:13:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:13:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 23:13:14,284 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-05 23:13:14,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:14,284 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 23:13:14,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 23:13:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:14,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:14,285 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:14,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:14,494 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:14,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:14,494 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-05 23:13:14,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:14,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513958242] [2020-10-05 23:13:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:14,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513958242] [2020-10-05 23:13:14,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721772198] [2020-10-05 23:13:14,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:14,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:14,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:14,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:14,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 23:13:14,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997563100] [2020-10-05 23:13:14,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:14,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:14,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:14,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:14,688 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-05 23:13:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:15,235 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-05 23:13:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:13:15,235 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 23:13:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:15,237 INFO L225 Difference]: With dead ends: 101 [2020-10-05 23:13:15,237 INFO L226 Difference]: Without dead ends: 95 [2020-10-05 23:13:15,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 23:13:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-05 23:13:15,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-05 23:13:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-05 23:13:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-05 23:13:15,241 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-05 23:13:15,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:15,241 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-05 23:13:15,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:15,242 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-05 23:13:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:15,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:15,242 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:15,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:15,451 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:15,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:15,451 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-05 23:13:15,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:15,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257998346] [2020-10-05 23:13:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:15,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257998346] [2020-10-05 23:13:15,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847985713] [2020-10-05 23:13:15,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:15,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:15,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:15,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:15,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:15,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:15,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:15,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 23:13:15,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829053142] [2020-10-05 23:13:15,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:15,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:15,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:15,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:15,656 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-05 23:13:16,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:16,378 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-10-05 23:13:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:13:16,379 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 23:13:16,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:16,380 INFO L225 Difference]: With dead ends: 82 [2020-10-05 23:13:16,380 INFO L226 Difference]: Without dead ends: 74 [2020-10-05 23:13:16,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:13:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-05 23:13:16,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-05 23:13:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-05 23:13:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-05 23:13:16,383 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-05 23:13:16,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:16,383 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-05 23:13:16,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-05 23:13:16,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:16,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:16,384 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:16,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:16,590 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:16,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:16,591 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-05 23:13:16,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:16,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822385287] [2020-10-05 23:13:16,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:16,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822385287] [2020-10-05 23:13:16,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998851042] [2020-10-05 23:13:16,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:16,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 23:13:16,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:16,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:16,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:16,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:13:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:16,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:16,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 23:13:16,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298163520] [2020-10-05 23:13:16,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:16,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:16,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:16,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:16,793 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-05 23:13:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:17,458 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-05 23:13:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:13:17,458 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 23:13:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:17,459 INFO L225 Difference]: With dead ends: 92 [2020-10-05 23:13:17,460 INFO L226 Difference]: Without dead ends: 87 [2020-10-05 23:13:17,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:13:17,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-05 23:13:17,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-05 23:13:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 23:13:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-05 23:13:17,463 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-05 23:13:17,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:17,463 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-05 23:13:17,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:17,464 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-05 23:13:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:17,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:17,464 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:17,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:17,665 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:17,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:17,666 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-05 23:13:17,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:17,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608194809] [2020-10-05 23:13:17,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:17,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608194809] [2020-10-05 23:13:17,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578314228] [2020-10-05 23:13:17,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:17,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:17,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:17,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:17,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:17,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:13:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:17,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:17,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:17,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400732248] [2020-10-05 23:13:17,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:17,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:17,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:17,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:17,892 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-05 23:13:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:18,614 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-05 23:13:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:13:18,615 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:18,616 INFO L225 Difference]: With dead ends: 78 [2020-10-05 23:13:18,616 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 23:13:18,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:13:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 23:13:18,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-05 23:13:18,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 23:13:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-05 23:13:18,619 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-05 23:13:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:18,620 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-05 23:13:18,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:18,620 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-05 23:13:18,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:18,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:18,620 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:18,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-05 23:13:18,831 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:18,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:18,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-05 23:13:18,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:18,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946899527] [2020-10-05 23:13:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:18,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946899527] [2020-10-05 23:13:18,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125211336] [2020-10-05 23:13:18,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:19,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 23:13:19,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:19,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:19,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:19,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:19,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 23:13:19,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492257782] [2020-10-05 23:13:19,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:19,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:19,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:19,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:19,067 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-05 23:13:19,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:19,353 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-05 23:13:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 23:13:19,354 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 23:13:19,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:19,355 INFO L225 Difference]: With dead ends: 84 [2020-10-05 23:13:19,355 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 23:13:19,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-05 23:13:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 23:13:19,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-05 23:13:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:13:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-05 23:13:19,357 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-05 23:13:19,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:19,357 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-05 23:13:19,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-05 23:13:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:19,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:19,358 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:19,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:19,559 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:19,559 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-05 23:13:19,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:19,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144778721] [2020-10-05 23:13:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:19,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144778721] [2020-10-05 23:13:19,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139597327] [2020-10-05 23:13:19,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:19,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 23:13:19,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:19,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:19,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:19,807 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:19,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:19,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:19,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124849209] [2020-10-05 23:13:19,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:19,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:19,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:19,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:19,819 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-05 23:13:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:20,178 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-05 23:13:20,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:13:20,178 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:20,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:20,179 INFO L225 Difference]: With dead ends: 98 [2020-10-05 23:13:20,180 INFO L226 Difference]: Without dead ends: 92 [2020-10-05 23:13:20,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-05 23:13:20,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-05 23:13:20,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-05 23:13:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-05 23:13:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-05 23:13:20,183 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-05 23:13:20,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:20,183 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-05 23:13:20,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:20,183 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-05 23:13:20,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:20,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:20,184 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:20,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-05 23:13:20,390 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:20,390 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-05 23:13:20,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:20,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665027501] [2020-10-05 23:13:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:20,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665027501] [2020-10-05 23:13:20,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710946802] [2020-10-05 23:13:20,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:20,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:20,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:20,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:20,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 23:13:20,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328470824] [2020-10-05 23:13:20,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:20,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:20,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:20,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:20,631 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-05 23:13:21,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:21,027 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-05 23:13:21,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:13:21,028 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 23:13:21,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:21,029 INFO L225 Difference]: With dead ends: 99 [2020-10-05 23:13:21,029 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 23:13:21,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 23:13:21,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 23:13:21,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-05 23:13:21,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 23:13:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-05 23:13:21,032 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-05 23:13:21,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:21,032 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-05 23:13:21,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:21,032 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-05 23:13:21,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:21,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:21,033 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:21,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:21,233 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:21,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-05 23:13:21,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:21,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190130534] [2020-10-05 23:13:21,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:21,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190130534] [2020-10-05 23:13:21,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182786716] [2020-10-05 23:13:21,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:21,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:21,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:21,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:21,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:21,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:21,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:21,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:21,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715471685] [2020-10-05 23:13:21,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:21,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:21,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:21,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:21,492 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-05 23:13:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:21,928 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-05 23:13:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:13:21,929 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:21,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:21,930 INFO L225 Difference]: With dead ends: 109 [2020-10-05 23:13:21,930 INFO L226 Difference]: Without dead ends: 103 [2020-10-05 23:13:21,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 23:13:21,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-05 23:13:21,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-05 23:13:21,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:13:21,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-05 23:13:21,933 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-05 23:13:21,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:21,933 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-05 23:13:21,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:21,933 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-05 23:13:21,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:21,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:21,934 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:22,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:22,143 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:22,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:22,143 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-05 23:13:22,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:22,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345938525] [2020-10-05 23:13:22,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:22,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345938525] [2020-10-05 23:13:22,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856623409] [2020-10-05 23:13:22,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:22,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 23:13:22,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:22,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:22,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:22,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:22,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 23:13:22,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739011358] [2020-10-05 23:13:22,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:22,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:22,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:22,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:22,366 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-05 23:13:22,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:22,784 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-05 23:13:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:13:22,785 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 23:13:22,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:22,786 INFO L225 Difference]: With dead ends: 109 [2020-10-05 23:13:22,786 INFO L226 Difference]: Without dead ends: 103 [2020-10-05 23:13:22,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:13:22,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-05 23:13:22,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-05 23:13:22,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-05 23:13:22,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-05 23:13:22,789 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-05 23:13:22,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:22,789 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-05 23:13:22,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:22,789 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-05 23:13:22,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:22,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:22,790 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:22,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-05 23:13:22,994 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:22,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:22,994 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-05 23:13:22,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:22,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396071559] [2020-10-05 23:13:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:23,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396071559] [2020-10-05 23:13:23,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017567602] [2020-10-05 23:13:23,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:23,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:23,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:23,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:23,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:23,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:23,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:23,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:23,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134153097] [2020-10-05 23:13:23,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:23,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:23,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:23,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:23,252 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-05 23:13:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:23,754 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-05 23:13:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:13:23,755 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:23,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:23,756 INFO L225 Difference]: With dead ends: 106 [2020-10-05 23:13:23,756 INFO L226 Difference]: Without dead ends: 100 [2020-10-05 23:13:23,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:13:23,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-05 23:13:23,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-05 23:13:23,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 23:13:23,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-05 23:13:23,759 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-05 23:13:23,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:23,759 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-05 23:13:23,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:23,759 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-05 23:13:23,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:23,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:23,760 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:23,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-05 23:13:23,962 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:23,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:23,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-05 23:13:23,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:23,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623098211] [2020-10-05 23:13:23,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:24,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623098211] [2020-10-05 23:13:24,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556026830] [2020-10-05 23:13:24,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:24,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 23:13:24,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:24,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:24,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:24,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:24,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 23:13:24,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201468121] [2020-10-05 23:13:24,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:24,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:24,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:24,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:24,191 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-05 23:13:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:24,663 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-05 23:13:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:13:24,664 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 23:13:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:24,665 INFO L225 Difference]: With dead ends: 107 [2020-10-05 23:13:24,665 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 23:13:24,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 23:13:24,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 23:13:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-05 23:13:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-05 23:13:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-05 23:13:24,668 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-05 23:13:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:24,668 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-05 23:13:24,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-05 23:13:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:24,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:24,668 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:24,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:24,870 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:24,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-05 23:13:24,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:24,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041323786] [2020-10-05 23:13:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:25,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041323786] [2020-10-05 23:13:25,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982398498] [2020-10-05 23:13:25,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:25,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 23:13:25,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:25,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:25,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:25,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:25,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:25,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:25,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366397983] [2020-10-05 23:13:25,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:25,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:25,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:25,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:25,118 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-05 23:13:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:25,710 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-05 23:13:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:13:25,711 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:25,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:25,712 INFO L225 Difference]: With dead ends: 104 [2020-10-05 23:13:25,712 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 23:13:25,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 23:13:25,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 23:13:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-05 23:13:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 23:13:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-05 23:13:25,719 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-05 23:13:25,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:25,719 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-05 23:13:25,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-05 23:13:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:25,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:25,720 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:25,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-05 23:13:25,929 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:25,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:25,930 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-05 23:13:25,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:25,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533766941] [2020-10-05 23:13:25,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:26,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533766941] [2020-10-05 23:13:26,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155973477] [2020-10-05 23:13:26,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:26,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:26,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:26,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:26,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 23:13:26,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447700470] [2020-10-05 23:13:26,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:26,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:26,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:26,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:26,251 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-05 23:13:26,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:26,815 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-05 23:13:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:13:26,816 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 23:13:26,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:26,817 INFO L225 Difference]: With dead ends: 105 [2020-10-05 23:13:26,817 INFO L226 Difference]: Without dead ends: 99 [2020-10-05 23:13:26,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 23:13:26,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-05 23:13:26,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-05 23:13:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 23:13:26,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 23:13:26,824 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-05 23:13:26,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:26,824 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 23:13:26,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:26,824 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 23:13:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:26,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:26,825 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:27,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:27,026 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:27,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:27,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-05 23:13:27,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:27,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284048671] [2020-10-05 23:13:27,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:27,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284048671] [2020-10-05 23:13:27,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633812381] [2020-10-05 23:13:27,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:27,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:27,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:27,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:27,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:27,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:27,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:27,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551826803] [2020-10-05 23:13:27,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:27,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:27,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:27,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:27,349 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-05 23:13:28,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:28,042 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-05 23:13:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:13:28,043 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:28,044 INFO L225 Difference]: With dead ends: 102 [2020-10-05 23:13:28,044 INFO L226 Difference]: Without dead ends: 96 [2020-10-05 23:13:28,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 23:13:28,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-05 23:13:28,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-05 23:13:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:13:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 23:13:28,046 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-05 23:13:28,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:28,047 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 23:13:28,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:28,047 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 23:13:28,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:28,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:28,047 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:28,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-05 23:13:28,248 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:28,248 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-05 23:13:28,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:28,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864292476] [2020-10-05 23:13:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:28,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864292476] [2020-10-05 23:13:28,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853685800] [2020-10-05 23:13:28,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:28,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 23:13:28,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:28,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:28,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:28,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:28,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 23:13:28,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527586781] [2020-10-05 23:13:28,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:28,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:28,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:28,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:28,459 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-05 23:13:29,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:29,048 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-05 23:13:29,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:13:29,049 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 23:13:29,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:29,050 INFO L225 Difference]: With dead ends: 103 [2020-10-05 23:13:29,050 INFO L226 Difference]: Without dead ends: 97 [2020-10-05 23:13:29,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:13:29,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-05 23:13:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-05 23:13:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-05 23:13:29,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-05 23:13:29,053 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-05 23:13:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:29,053 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-05 23:13:29,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-05 23:13:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:29,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:29,053 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:29,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:29,254 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:29,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:29,255 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-05 23:13:29,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:29,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177909857] [2020-10-05 23:13:29,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:29,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177909857] [2020-10-05 23:13:29,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542670711] [2020-10-05 23:13:29,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:29,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:29,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:29,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:29,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:29,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:29,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:29,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:29,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667861495] [2020-10-05 23:13:29,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:29,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:29,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:29,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:29,487 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-05 23:13:30,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:30,227 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-05 23:13:30,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:13:30,228 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:30,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:30,229 INFO L225 Difference]: With dead ends: 100 [2020-10-05 23:13:30,229 INFO L226 Difference]: Without dead ends: 94 [2020-10-05 23:13:30,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:13:30,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-05 23:13:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-05 23:13:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 23:13:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-05 23:13:30,232 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-05 23:13:30,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:30,232 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-05 23:13:30,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:30,232 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-05 23:13:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:30,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:30,233 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:30,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-05 23:13:30,434 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:30,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:30,434 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-05 23:13:30,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:30,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100492595] [2020-10-05 23:13:30,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:30,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100492595] [2020-10-05 23:13:30,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098189717] [2020-10-05 23:13:30,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:30,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 23:13:30,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:30,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:30,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:30,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:30,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 23:13:30,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574717923] [2020-10-05 23:13:30,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:30,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:30,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:30,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:30,654 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-05 23:13:31,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:31,291 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-05 23:13:31,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:13:31,292 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 23:13:31,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:31,293 INFO L225 Difference]: With dead ends: 120 [2020-10-05 23:13:31,293 INFO L226 Difference]: Without dead ends: 114 [2020-10-05 23:13:31,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:13:31,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-05 23:13:31,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-05 23:13:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 23:13:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-05 23:13:31,303 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-05 23:13:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:31,304 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-05 23:13:31,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:31,304 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-05 23:13:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:31,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:31,305 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:31,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-05 23:13:31,516 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:31,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:31,517 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-05 23:13:31,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:31,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184584063] [2020-10-05 23:13:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:31,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184584063] [2020-10-05 23:13:31,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045218481] [2020-10-05 23:13:31,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:31,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 23:13:31,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:31,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:31,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:31,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:31,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:31,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:31,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165301401] [2020-10-05 23:13:31,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:31,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:31,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:31,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:31,738 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-05 23:13:32,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:32,519 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-05 23:13:32,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:13:32,519 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:32,520 INFO L225 Difference]: With dead ends: 101 [2020-10-05 23:13:32,521 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 23:13:32,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:13:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 23:13:32,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-05 23:13:32,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-05 23:13:32,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-05 23:13:32,524 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-05 23:13:32,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:32,524 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-05 23:13:32,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:32,524 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-05 23:13:32,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:32,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:32,525 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:32,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:32,728 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:32,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:32,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-05 23:13:32,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:32,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830339949] [2020-10-05 23:13:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:32,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830339949] [2020-10-05 23:13:32,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226496260] [2020-10-05 23:13:32,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:33,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:33,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:33,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:33,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 23:13:33,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923706483] [2020-10-05 23:13:33,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:33,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:33,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:33,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:33,055 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-05 23:13:33,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:33,561 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-05 23:13:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:13:33,561 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 23:13:33,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:33,562 INFO L225 Difference]: With dead ends: 114 [2020-10-05 23:13:33,562 INFO L226 Difference]: Without dead ends: 108 [2020-10-05 23:13:33,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 23:13:33,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-05 23:13:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-05 23:13:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:13:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 23:13:33,565 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 23:13:33,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:33,565 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 23:13:33,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 23:13:33,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:33,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:33,566 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:33,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:33,774 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:33,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:33,775 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-05 23:13:33,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:33,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847011883] [2020-10-05 23:13:33,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:34,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847011883] [2020-10-05 23:13:34,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800052400] [2020-10-05 23:13:34,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:34,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:34,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:34,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:34,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:34,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:34,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:34,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888481515] [2020-10-05 23:13:34,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:34,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:34,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:34,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:34,189 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 23:13:34,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:34,629 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-05 23:13:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:13:34,629 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:34,630 INFO L225 Difference]: With dead ends: 111 [2020-10-05 23:13:34,630 INFO L226 Difference]: Without dead ends: 105 [2020-10-05 23:13:34,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:13:34,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-05 23:13:34,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-05 23:13:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:13:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 23:13:34,633 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 23:13:34,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:34,633 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 23:13:34,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 23:13:34,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:34,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:34,634 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:34,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-05 23:13:34,835 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:34,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:34,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-05 23:13:34,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:34,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678611197] [2020-10-05 23:13:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:35,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678611197] [2020-10-05 23:13:35,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753076263] [2020-10-05 23:13:35,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:35,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 23:13:35,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:35,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:35,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:35,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:35,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 23:13:35,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108470551] [2020-10-05 23:13:35,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:35,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:35,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:35,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:35,098 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 23:13:35,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:35,521 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-05 23:13:35,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:13:35,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 23:13:35,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:35,522 INFO L225 Difference]: With dead ends: 108 [2020-10-05 23:13:35,522 INFO L226 Difference]: Without dead ends: 102 [2020-10-05 23:13:35,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 23:13:35,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-05 23:13:35,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-05 23:13:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:13:35,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 23:13:35,525 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 23:13:35,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:35,525 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 23:13:35,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:35,525 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 23:13:35,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:35,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:35,526 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:35,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:35,731 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:35,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:35,731 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-05 23:13:35,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:35,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403141792] [2020-10-05 23:13:35,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:35,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403141792] [2020-10-05 23:13:35,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104069172] [2020-10-05 23:13:35,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:35,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:35,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:35,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:35,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:35,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:36,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:36,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:36,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35348110] [2020-10-05 23:13:36,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:36,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:36,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:36,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:36,002 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 23:13:36,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:36,542 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-05 23:13:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:13:36,543 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:36,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:36,543 INFO L225 Difference]: With dead ends: 107 [2020-10-05 23:13:36,543 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 23:13:36,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 23:13:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 23:13:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-05 23:13:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:13:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 23:13:36,546 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 23:13:36,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:36,547 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 23:13:36,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:36,547 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 23:13:36,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:36,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:36,547 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:36,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-05 23:13:36,755 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:36,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:36,755 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-05 23:13:36,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:36,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970800736] [2020-10-05 23:13:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:36,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970800736] [2020-10-05 23:13:36,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167372713] [2020-10-05 23:13:36,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:36,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 23:13:36,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:36,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:36,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:37,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:37,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 23:13:37,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849687965] [2020-10-05 23:13:37,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:37,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:37,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:37,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:37,005 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 23:13:37,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:37,487 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-05 23:13:37,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:13:37,488 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 23:13:37,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:37,489 INFO L225 Difference]: With dead ends: 104 [2020-10-05 23:13:37,489 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 23:13:37,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:13:37,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 23:13:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-05 23:13:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:13:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 23:13:37,492 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 23:13:37,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:37,492 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 23:13:37,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:37,492 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 23:13:37,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:37,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:37,493 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:37,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-05 23:13:37,699 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:37,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:37,699 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-05 23:13:37,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:37,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32954421] [2020-10-05 23:13:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:37,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32954421] [2020-10-05 23:13:37,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094371277] [2020-10-05 23:13:37,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:37,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 23:13:37,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:37,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:37,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:37,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:37,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:37,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:37,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235442336] [2020-10-05 23:13:37,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:37,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:37,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:37,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:37,980 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 23:13:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:38,602 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-05 23:13:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:13:38,603 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:38,603 INFO L225 Difference]: With dead ends: 103 [2020-10-05 23:13:38,604 INFO L226 Difference]: Without dead ends: 97 [2020-10-05 23:13:38,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 23:13:38,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-05 23:13:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-05 23:13:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:13:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 23:13:38,607 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 23:13:38,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:38,607 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 23:13:38,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 23:13:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:38,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:38,608 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:38,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-05 23:13:38,813 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:38,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:38,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-05 23:13:38,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:38,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002201093] [2020-10-05 23:13:38,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:38,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002201093] [2020-10-05 23:13:38,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408279611] [2020-10-05 23:13:38,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:39,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:39,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:39,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:39,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 23:13:39,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473405313] [2020-10-05 23:13:39,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:39,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:39,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:39,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:39,046 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 23:13:39,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:39,585 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-05 23:13:39,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:13:39,586 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 23:13:39,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:39,587 INFO L225 Difference]: With dead ends: 100 [2020-10-05 23:13:39,587 INFO L226 Difference]: Without dead ends: 94 [2020-10-05 23:13:39,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 23:13:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-05 23:13:39,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-05 23:13:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:13:39,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 23:13:39,589 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 23:13:39,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:39,589 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 23:13:39,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:39,590 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 23:13:39,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:39,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:39,590 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:39,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:39,796 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:39,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:39,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-05 23:13:39,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:39,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759320952] [2020-10-05 23:13:39,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:39,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759320952] [2020-10-05 23:13:39,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213865459] [2020-10-05 23:13:39,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:40,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:40,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:40,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:40,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:40,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:40,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:40,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:40,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767296452] [2020-10-05 23:13:40,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:40,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:40,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:40,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:40,043 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 23:13:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:40,747 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-05 23:13:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:13:40,747 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:40,748 INFO L225 Difference]: With dead ends: 99 [2020-10-05 23:13:40,748 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 23:13:40,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:13:40,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 23:13:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-05 23:13:40,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:13:40,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 23:13:40,751 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 23:13:40,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:40,751 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 23:13:40,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 23:13:40,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:40,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:40,752 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:40,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-05 23:13:40,952 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:40,953 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-05 23:13:40,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:40,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844869130] [2020-10-05 23:13:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:41,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844869130] [2020-10-05 23:13:41,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967306731] [2020-10-05 23:13:41,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:41,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 23:13:41,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:41,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:41,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:41,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:41,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 23:13:41,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494419092] [2020-10-05 23:13:41,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:41,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:41,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:41,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:41,188 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 23:13:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:41,792 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-05 23:13:41,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:13:41,792 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 23:13:41,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:41,793 INFO L225 Difference]: With dead ends: 96 [2020-10-05 23:13:41,793 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 23:13:41,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 23:13:41,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 23:13:41,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-05 23:13:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:13:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 23:13:41,796 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 23:13:41,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:41,797 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 23:13:41,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:41,797 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 23:13:41,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:41,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:41,797 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:42,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:42,004 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:42,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-05 23:13:42,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:42,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891861766] [2020-10-05 23:13:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:42,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891861766] [2020-10-05 23:13:42,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181881970] [2020-10-05 23:13:42,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:42,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:42,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:42,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:42,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:42,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:42,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:42,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:42,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57330555] [2020-10-05 23:13:42,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:42,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:42,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:42,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:42,241 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 23:13:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:43,029 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-05 23:13:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:13:43,030 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:43,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:43,031 INFO L225 Difference]: With dead ends: 95 [2020-10-05 23:13:43,031 INFO L226 Difference]: Without dead ends: 89 [2020-10-05 23:13:43,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:13:43,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-05 23:13:43,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-05 23:13:43,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:13:43,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 23:13:43,033 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 23:13:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:43,034 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 23:13:43,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 23:13:43,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:43,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:43,034 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:43,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:43,235 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:43,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:43,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-05 23:13:43,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:43,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294433345] [2020-10-05 23:13:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:43,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294433345] [2020-10-05 23:13:43,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402848996] [2020-10-05 23:13:43,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:43,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 23:13:43,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:43,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:43,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:43,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:43,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 23:13:43,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102560583] [2020-10-05 23:13:43,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:43,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:43,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:43,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:43,472 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 23:13:44,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:44,118 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-05 23:13:44,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:13:44,119 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 23:13:44,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:44,120 INFO L225 Difference]: With dead ends: 92 [2020-10-05 23:13:44,120 INFO L226 Difference]: Without dead ends: 86 [2020-10-05 23:13:44,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:13:44,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-05 23:13:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-05 23:13:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:13:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 23:13:44,124 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 23:13:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:44,124 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 23:13:44,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 23:13:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:44,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:44,125 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:44,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:44,334 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:44,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:44,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-05 23:13:44,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:44,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598803623] [2020-10-05 23:13:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:44,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598803623] [2020-10-05 23:13:44,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719424313] [2020-10-05 23:13:44,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:44,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 23:13:44,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:44,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:44,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:44,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:44,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:44,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:44,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30857261] [2020-10-05 23:13:44,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:44,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:44,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:44,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:44,584 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 23:13:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:45,463 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-05 23:13:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:13:45,464 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:45,465 INFO L225 Difference]: With dead ends: 91 [2020-10-05 23:13:45,465 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 23:13:45,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 23:13:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 23:13:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-05 23:13:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:13:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 23:13:45,467 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 23:13:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:45,467 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 23:13:45,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:45,467 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 23:13:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:45,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:45,468 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:45,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:45,669 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:45,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:45,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-05 23:13:45,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:45,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350476599] [2020-10-05 23:13:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:45,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350476599] [2020-10-05 23:13:45,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775305436] [2020-10-05 23:13:45,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:45,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:45,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:45,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:45,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 23:13:45,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308749442] [2020-10-05 23:13:45,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:45,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:45,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:45,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:45,934 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 23:13:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:46,761 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-05 23:13:46,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:13:46,762 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 23:13:46,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:46,762 INFO L225 Difference]: With dead ends: 107 [2020-10-05 23:13:46,763 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 23:13:46,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:13:46,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 23:13:46,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-05 23:13:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-05 23:13:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-05 23:13:46,769 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-05 23:13:46,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:46,769 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-05 23:13:46,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-05 23:13:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:46,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:46,770 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:46,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-05 23:13:46,971 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:46,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:46,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-05 23:13:46,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:46,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164870473] [2020-10-05 23:13:46,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:47,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164870473] [2020-10-05 23:13:47,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600946850] [2020-10-05 23:13:47,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:47,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:47,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:47,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:47,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:47,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:47,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:47,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:47,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047319255] [2020-10-05 23:13:47,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:47,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:47,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:47,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:47,211 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-05 23:13:48,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:48,131 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-05 23:13:48,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 23:13:48,131 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:48,132 INFO L225 Difference]: With dead ends: 88 [2020-10-05 23:13:48,132 INFO L226 Difference]: Without dead ends: 80 [2020-10-05 23:13:48,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:13:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-05 23:13:48,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-05 23:13:48,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 23:13:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-05 23:13:48,134 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-05 23:13:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:48,135 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-05 23:13:48,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-05 23:13:48,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:48,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:48,135 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:48,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-05 23:13:48,340 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:48,340 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-05 23:13:48,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:48,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814664196] [2020-10-05 23:13:48,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:48,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814664196] [2020-10-05 23:13:48,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889911001] [2020-10-05 23:13:48,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:48,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 23:13:48,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:48,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:48,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:48,575 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:13:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:48,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:48,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:48,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526944710] [2020-10-05 23:13:48,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:48,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:48,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:48,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:48,595 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-05 23:13:49,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:49,440 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-05 23:13:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:13:49,441 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:49,441 INFO L225 Difference]: With dead ends: 100 [2020-10-05 23:13:49,442 INFO L226 Difference]: Without dead ends: 95 [2020-10-05 23:13:49,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:13:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-05 23:13:49,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-05 23:13:49,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 23:13:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-05 23:13:49,444 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-05 23:13:49,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:49,445 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-05 23:13:49,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:49,445 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-05 23:13:49,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:49,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:49,445 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:49,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-05 23:13:49,648 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:49,648 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-05 23:13:49,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:49,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091648968] [2020-10-05 23:13:49,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:49,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091648968] [2020-10-05 23:13:49,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687322154] [2020-10-05 23:13:49,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:49,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:49,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:49,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:49,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:49,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:13:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:49,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:49,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:13:49,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766189996] [2020-10-05 23:13:49,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:13:49,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:49,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:13:49,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:13:49,914 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-05 23:13:50,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:50,839 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-05 23:13:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:13:50,840 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:13:50,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:50,840 INFO L225 Difference]: With dead ends: 84 [2020-10-05 23:13:50,841 INFO L226 Difference]: Without dead ends: 79 [2020-10-05 23:13:50,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:13:50,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-05 23:13:50,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-05 23:13:50,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 23:13:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-05 23:13:50,843 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-05 23:13:50,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:50,844 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-05 23:13:50,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:13:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-05 23:13:50,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:50,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:50,845 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:51,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-05 23:13:51,052 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:51,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-05 23:13:51,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:51,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766739529] [2020-10-05 23:13:51,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:51,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766739529] [2020-10-05 23:13:51,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481885274] [2020-10-05 23:13:51,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:51,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 23:13:51,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:51,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:51,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:51,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:51,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:13:51,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161302506] [2020-10-05 23:13:51,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:51,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:51,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:51,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:51,337 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-05 23:13:51,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:51,706 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-05 23:13:51,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:13:51,707 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:13:51,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:51,707 INFO L225 Difference]: With dead ends: 90 [2020-10-05 23:13:51,708 INFO L226 Difference]: Without dead ends: 84 [2020-10-05 23:13:51,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 23:13:51,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-05 23:13:51,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-05 23:13:51,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 23:13:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-05 23:13:51,710 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-05 23:13:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:51,710 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-05 23:13:51,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:51,711 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-05 23:13:51,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:51,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:51,712 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:51,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:51,915 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:51,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:51,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-05 23:13:51,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:51,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625299755] [2020-10-05 23:13:51,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:52,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625299755] [2020-10-05 23:13:52,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432775091] [2020-10-05 23:13:52,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:52,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 23:13:52,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:52,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:52,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:52,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:52,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:52,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:13:52,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055095778] [2020-10-05 23:13:52,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:13:52,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:52,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:13:52,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:13:52,237 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-05 23:13:52,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:52,683 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-05 23:13:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:13:52,683 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:13:52,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:52,684 INFO L225 Difference]: With dead ends: 106 [2020-10-05 23:13:52,685 INFO L226 Difference]: Without dead ends: 100 [2020-10-05 23:13:52,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:13:52,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-05 23:13:52,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-05 23:13:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 23:13:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-05 23:13:52,688 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-05 23:13:52,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:52,688 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-05 23:13:52,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:13:52,688 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-05 23:13:52,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:52,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:52,688 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:52,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-05 23:13:52,891 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:52,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:52,891 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-05 23:13:52,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:52,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128968149] [2020-10-05 23:13:52,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:53,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128968149] [2020-10-05 23:13:53,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133654491] [2020-10-05 23:13:53,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:53,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:53,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:53,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:53,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:13:53,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138872824] [2020-10-05 23:13:53,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:53,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:53,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:53,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:53,182 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-05 23:13:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:53,667 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-05 23:13:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:13:53,668 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:13:53,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:53,669 INFO L225 Difference]: With dead ends: 107 [2020-10-05 23:13:53,669 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 23:13:53,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:13:53,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 23:13:53,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-05 23:13:53,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-05 23:13:53,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-05 23:13:53,672 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-05 23:13:53,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:53,672 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-05 23:13:53,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:53,672 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-05 23:13:53,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:53,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:53,672 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:53,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-05 23:13:53,880 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:53,880 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-05 23:13:53,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:53,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122373127] [2020-10-05 23:13:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:54,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122373127] [2020-10-05 23:13:54,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66538199] [2020-10-05 23:13:54,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:54,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:54,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:54,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:54,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:54,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:54,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:54,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:13:54,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546685792] [2020-10-05 23:13:54,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:13:54,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:54,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:13:54,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:13:54,197 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-05 23:13:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:54,685 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-05 23:13:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:13:54,685 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:13:54,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:54,686 INFO L225 Difference]: With dead ends: 119 [2020-10-05 23:13:54,686 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 23:13:54,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 23:13:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 23:13:54,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-05 23:13:54,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 23:13:54,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-05 23:13:54,688 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-05 23:13:54,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:54,688 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-05 23:13:54,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:13:54,688 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-05 23:13:54,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:54,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:54,689 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:54,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-05 23:13:54,889 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:54,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:54,890 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-05 23:13:54,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:54,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128096559] [2020-10-05 23:13:54,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:55,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128096559] [2020-10-05 23:13:55,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531576883] [2020-10-05 23:13:55,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:55,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-05 23:13:55,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:55,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:55,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:55,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:55,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:13:55,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430428004] [2020-10-05 23:13:55,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:55,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:55,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:55,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:55,175 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-05 23:13:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:55,702 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-05 23:13:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:13:55,702 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:13:55,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:55,703 INFO L225 Difference]: With dead ends: 119 [2020-10-05 23:13:55,703 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 23:13:55,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 23:13:55,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 23:13:55,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-05 23:13:55,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 23:13:55,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-05 23:13:55,706 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-05 23:13:55,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:55,707 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-05 23:13:55,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:55,707 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-05 23:13:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:55,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:55,707 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:55,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:55,915 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:55,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-05 23:13:55,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:55,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782579850] [2020-10-05 23:13:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:56,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782579850] [2020-10-05 23:13:56,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119348519] [2020-10-05 23:13:56,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:56,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:56,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:56,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:56,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:56,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:56,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:56,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:13:56,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305598102] [2020-10-05 23:13:56,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:13:56,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:56,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:13:56,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:13:56,221 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-05 23:13:56,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:56,837 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-05 23:13:56,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:13:56,838 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:13:56,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:56,839 INFO L225 Difference]: With dead ends: 116 [2020-10-05 23:13:56,839 INFO L226 Difference]: Without dead ends: 110 [2020-10-05 23:13:56,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 23:13:56,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-05 23:13:56,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-05 23:13:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:13:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-05 23:13:56,842 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-05 23:13:56,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:56,842 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-05 23:13:56,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:13:56,842 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-05 23:13:56,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:56,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:56,842 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:57,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:57,043 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:57,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:57,044 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-05 23:13:57,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:57,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926939106] [2020-10-05 23:13:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:57,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926939106] [2020-10-05 23:13:57,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612849351] [2020-10-05 23:13:57,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:57,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 23:13:57,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:57,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:57,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:57,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:57,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:13:57,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56902225] [2020-10-05 23:13:57,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:57,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:57,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:57,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:57,324 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-05 23:13:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:57,917 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-05 23:13:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:13:57,918 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:13:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:57,918 INFO L225 Difference]: With dead ends: 117 [2020-10-05 23:13:57,918 INFO L226 Difference]: Without dead ends: 111 [2020-10-05 23:13:57,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:13:57,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-05 23:13:57,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-05 23:13:57,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-05 23:13:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-05 23:13:57,921 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-05 23:13:57,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:57,921 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-05 23:13:57,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:57,922 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-05 23:13:57,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:57,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:57,922 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:58,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:58,123 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:58,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-05 23:13:58,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:58,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834284229] [2020-10-05 23:13:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:58,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834284229] [2020-10-05 23:13:58,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035831581] [2020-10-05 23:13:58,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:58,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 23:13:58,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:58,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:58,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:58,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:58,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:58,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:13:58,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801745226] [2020-10-05 23:13:58,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:13:58,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:58,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:13:58,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:13:58,437 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-05 23:13:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:59,127 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-05 23:13:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:13:59,128 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:13:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:59,128 INFO L225 Difference]: With dead ends: 114 [2020-10-05 23:13:59,129 INFO L226 Difference]: Without dead ends: 108 [2020-10-05 23:13:59,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:13:59,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-05 23:13:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-05 23:13:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 23:13:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-05 23:13:59,131 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-05 23:13:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:59,131 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-05 23:13:59,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:13:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-05 23:13:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:59,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:59,132 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:59,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-05 23:13:59,333 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:59,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:59,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-05 23:13:59,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:59,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557926076] [2020-10-05 23:13:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:59,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557926076] [2020-10-05 23:13:59,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572877201] [2020-10-05 23:13:59,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:13:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:59,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:59,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:59,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:59,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:13:59,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505179387] [2020-10-05 23:13:59,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:59,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:59,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:59,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:59,591 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-05 23:14:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:00,229 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-05 23:14:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:14:00,229 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:14:00,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:00,230 INFO L225 Difference]: With dead ends: 115 [2020-10-05 23:14:00,230 INFO L226 Difference]: Without dead ends: 109 [2020-10-05 23:14:00,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:14:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-05 23:14:00,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-05 23:14:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-05 23:14:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-05 23:14:00,233 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-05 23:14:00,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:00,233 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-05 23:14:00,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:14:00,233 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-05 23:14:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:14:00,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:00,234 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:00,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:00,441 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-05 23:14:00,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:00,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923985209] [2020-10-05 23:14:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:00,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923985209] [2020-10-05 23:14:00,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776566329] [2020-10-05 23:14:00,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:00,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:14:00,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:00,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:14:00,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:00,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:00,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:00,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:14:00,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291660099] [2020-10-05 23:14:00,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:00,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:00,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:00,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:00,725 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-05 23:14:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:01,514 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-05 23:14:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:14:01,515 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:14:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:01,516 INFO L225 Difference]: With dead ends: 112 [2020-10-05 23:14:01,516 INFO L226 Difference]: Without dead ends: 106 [2020-10-05 23:14:01,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:14:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-05 23:14:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-05 23:14:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-05 23:14:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-05 23:14:01,519 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-05 23:14:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:01,519 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-05 23:14:01,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-05 23:14:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:14:01,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:01,520 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:01,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-05 23:14:01,729 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:01,729 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-05 23:14:01,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:01,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444378493] [2020-10-05 23:14:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:01,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444378493] [2020-10-05 23:14:01,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375355585] [2020-10-05 23:14:01,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:01,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-05 23:14:01,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:01,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:14:01,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:01,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:01,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:14:01,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335587283] [2020-10-05 23:14:01,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:14:01,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:01,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:14:01,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:14:01,984 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-05 23:14:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:02,674 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-05 23:14:02,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:14:02,674 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:14:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:02,675 INFO L225 Difference]: With dead ends: 113 [2020-10-05 23:14:02,675 INFO L226 Difference]: Without dead ends: 107 [2020-10-05 23:14:02,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 23:14:02,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-05 23:14:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-05 23:14:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:14:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 23:14:02,677 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-05 23:14:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:02,677 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 23:14:02,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:14:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 23:14:02,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:14:02,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:02,678 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:02,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-05 23:14:02,879 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:02,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:02,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-05 23:14:02,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:02,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906748802] [2020-10-05 23:14:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:03,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906748802] [2020-10-05 23:14:03,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845237176] [2020-10-05 23:14:03,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:03,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:14:03,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:03,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:14:03,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:03,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:03,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:03,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:14:03,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197069002] [2020-10-05 23:14:03,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:03,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:03,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:03,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:03,155 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-05 23:14:04,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:04,020 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-05 23:14:04,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:14:04,021 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:14:04,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:04,021 INFO L225 Difference]: With dead ends: 110 [2020-10-05 23:14:04,021 INFO L226 Difference]: Without dead ends: 104 [2020-10-05 23:14:04,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 23:14:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-05 23:14:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-05 23:14:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:14:04,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 23:14:04,024 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-05 23:14:04,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:04,024 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 23:14:04,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 23:14:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:14:04,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:04,024 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:04,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-05 23:14:04,225 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:04,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:04,226 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-05 23:14:04,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:04,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748740949] [2020-10-05 23:14:04,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:04,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748740949] [2020-10-05 23:14:04,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943377508] [2020-10-05 23:14:04,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:04,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 23:14:04,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:04,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:14:04,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:04,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:04,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:14:04,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136679752] [2020-10-05 23:14:04,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:14:04,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:04,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:14:04,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:14:04,483 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-05 23:14:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:05,307 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-05 23:14:05,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 23:14:05,308 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:14:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:05,308 INFO L225 Difference]: With dead ends: 111 [2020-10-05 23:14:05,308 INFO L226 Difference]: Without dead ends: 105 [2020-10-05 23:14:05,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:14:05,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-05 23:14:05,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-05 23:14:05,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-05 23:14:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-05 23:14:05,311 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-05 23:14:05,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:05,311 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-05 23:14:05,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:14:05,312 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-05 23:14:05,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:14:05,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:05,312 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:05,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:05,513 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:05,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:05,514 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-05 23:14:05,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:05,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631978393] [2020-10-05 23:14:05,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:05,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631978393] [2020-10-05 23:14:05,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649412867] [2020-10-05 23:14:05,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:05,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 23:14:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:05,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:14:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:05,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:05,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:05,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:14:05,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238472319] [2020-10-05 23:14:05,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:05,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:05,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:05,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:05,789 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-05 23:14:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:06,743 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-05 23:14:06,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 23:14:06,744 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:14:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:06,744 INFO L225 Difference]: With dead ends: 108 [2020-10-05 23:14:06,744 INFO L226 Difference]: Without dead ends: 102 [2020-10-05 23:14:06,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:14:06,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-05 23:14:06,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-05 23:14:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 23:14:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-05 23:14:06,749 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-05 23:14:06,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:06,749 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-05 23:14:06,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-05 23:14:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:14:06,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:06,750 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:06,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-05 23:14:06,950 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:06,951 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-05 23:14:06,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:06,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18806833] [2020-10-05 23:14:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:07,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18806833] [2020-10-05 23:14:07,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799336154] [2020-10-05 23:14:07,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:07,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:14:07,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:07,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:07,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:14:07,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913483332] [2020-10-05 23:14:07,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:14:07,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:07,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:14:07,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:14:07,201 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-05 23:14:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:08,011 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-05 23:14:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:14:08,012 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:14:08,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:08,013 INFO L225 Difference]: With dead ends: 128 [2020-10-05 23:14:08,013 INFO L226 Difference]: Without dead ends: 122 [2020-10-05 23:14:08,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 23:14:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-05 23:14:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-05 23:14:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 23:14:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-05 23:14:08,016 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-05 23:14:08,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:08,016 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-05 23:14:08,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:14:08,016 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-05 23:14:08,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:14:08,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:08,016 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:08,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:08,217 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:08,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:08,218 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-05 23:14:08,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:08,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406091295] [2020-10-05 23:14:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:08,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406091295] [2020-10-05 23:14:08,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002522760] [2020-10-05 23:14:08,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:08,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:14:08,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:08,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:08,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:08,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:08,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:14:08,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24312263] [2020-10-05 23:14:08,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:08,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:08,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:08,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:08,497 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-05 23:14:09,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:09,459 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-05 23:14:09,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 23:14:09,460 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:14:09,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:09,460 INFO L225 Difference]: With dead ends: 109 [2020-10-05 23:14:09,461 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 23:14:09,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 23:14:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 23:14:09,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-05 23:14:09,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-05 23:14:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-05 23:14:09,463 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-05 23:14:09,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:09,464 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-05 23:14:09,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-05 23:14:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:09,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:09,464 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:09,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:09,665 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:09,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:09,666 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-05 23:14:09,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:09,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898754188] [2020-10-05 23:14:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:09,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898754188] [2020-10-05 23:14:09,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829110486] [2020-10-05 23:14:09,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:09,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-05 23:14:09,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:09,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:09,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:10,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:10,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:10,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90588677] [2020-10-05 23:14:10,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:10,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:10,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:10,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:10,005 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-05 23:14:10,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:10,464 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-05 23:14:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:14:10,464 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:10,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:10,465 INFO L225 Difference]: With dead ends: 124 [2020-10-05 23:14:10,465 INFO L226 Difference]: Without dead ends: 118 [2020-10-05 23:14:10,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:14:10,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-05 23:14:10,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-05 23:14:10,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:10,468 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 23:14:10,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:10,468 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:10,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:10,468 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:10,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:10,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:10,469 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:10,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:10,669 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:10,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:10,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-05 23:14:10,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:10,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000800789] [2020-10-05 23:14:10,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:10,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000800789] [2020-10-05 23:14:10,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908529988] [2020-10-05 23:14:10,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:10,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:14:10,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:10,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:10,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:11,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:11,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:11,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:11,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861476406] [2020-10-05 23:14:11,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:11,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:11,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:11,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:11,017 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 23:14:11,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:11,569 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-05 23:14:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:14:11,570 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:11,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:11,570 INFO L225 Difference]: With dead ends: 121 [2020-10-05 23:14:11,571 INFO L226 Difference]: Without dead ends: 115 [2020-10-05 23:14:11,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 23:14:11,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-05 23:14:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-05 23:14:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:11,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:11,573 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 23:14:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:11,574 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:11,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:11,574 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:11,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:11,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:11,574 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:11,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:11,775 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:11,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:11,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-05 23:14:11,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:11,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336034191] [2020-10-05 23:14:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:12,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336034191] [2020-10-05 23:14:12,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236772408] [2020-10-05 23:14:12,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:12,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 23:14:12,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:12,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:12,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:12,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:12,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:12,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038943945] [2020-10-05 23:14:12,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:12,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:12,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:12,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:12,089 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 23:14:12,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:12,599 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-05 23:14:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:14:12,600 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:12,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:12,600 INFO L225 Difference]: With dead ends: 118 [2020-10-05 23:14:12,600 INFO L226 Difference]: Without dead ends: 112 [2020-10-05 23:14:12,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 23:14:12,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-05 23:14:12,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-05 23:14:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:12,603 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 23:14:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:12,603 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:12,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:12,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:12,603 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:12,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:12,804 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:12,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:12,804 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-05 23:14:12,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:12,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332046959] [2020-10-05 23:14:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:13,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332046959] [2020-10-05 23:14:13,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783731995] [2020-10-05 23:14:13,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:13,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 23:14:13,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:13,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:13,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:13,134 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:13,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:13,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:13,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796913408] [2020-10-05 23:14:13,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:13,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:13,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:13,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:13,148 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 23:14:13,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:13,783 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-05 23:14:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:14:13,784 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:13,785 INFO L225 Difference]: With dead ends: 117 [2020-10-05 23:14:13,785 INFO L226 Difference]: Without dead ends: 111 [2020-10-05 23:14:13,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:14:13,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-05 23:14:13,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-05 23:14:13,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:13,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:13,788 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 23:14:13,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:13,789 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:13,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:13,789 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:13,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:13,789 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:13,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-05 23:14:13,995 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:13,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-05 23:14:13,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:13,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840827490] [2020-10-05 23:14:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:14,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840827490] [2020-10-05 23:14:14,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349512978] [2020-10-05 23:14:14,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:14,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:14,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:14,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:14,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:14,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43735446] [2020-10-05 23:14:14,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:14,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:14,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:14,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:14,296 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 23:14:14,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:14,883 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-05 23:14:14,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:14:14,883 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:14,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:14,884 INFO L225 Difference]: With dead ends: 114 [2020-10-05 23:14:14,884 INFO L226 Difference]: Without dead ends: 108 [2020-10-05 23:14:14,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 23:14:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-05 23:14:14,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-05 23:14:14,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:14,887 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 23:14:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:14,887 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:14,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:14,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:14,888 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:15,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-05 23:14:15,092 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:15,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:15,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-05 23:14:15,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:15,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738401613] [2020-10-05 23:14:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:15,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738401613] [2020-10-05 23:14:15,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464760295] [2020-10-05 23:14:15,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:15,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:14:15,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:15,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:15,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:15,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:15,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:15,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:15,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123433314] [2020-10-05 23:14:15,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:15,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:15,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:15,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:15,414 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 23:14:16,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:16,153 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-05 23:14:16,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:14:16,153 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:16,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:16,154 INFO L225 Difference]: With dead ends: 113 [2020-10-05 23:14:16,154 INFO L226 Difference]: Without dead ends: 107 [2020-10-05 23:14:16,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:14:16,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-05 23:14:16,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-05 23:14:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:16,157 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 23:14:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:16,157 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:16,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:16,157 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:16,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:16,158 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:16,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-05 23:14:16,365 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:16,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:16,365 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-05 23:14:16,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:16,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124030999] [2020-10-05 23:14:16,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:16,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124030999] [2020-10-05 23:14:16,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186358135] [2020-10-05 23:14:16,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:16,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-05 23:14:16,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:16,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:16,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:16,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:16,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:16,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516320403] [2020-10-05 23:14:16,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:16,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:16,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:16,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:16,660 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 23:14:17,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:17,324 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-05 23:14:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:14:17,325 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:17,325 INFO L225 Difference]: With dead ends: 110 [2020-10-05 23:14:17,326 INFO L226 Difference]: Without dead ends: 104 [2020-10-05 23:14:17,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:14:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-05 23:14:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-05 23:14:17,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:17,328 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 23:14:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:17,329 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:17,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:17,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:17,331 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:17,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-05 23:14:17,531 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:17,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:17,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-05 23:14:17,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:17,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655156201] [2020-10-05 23:14:17,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:17,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655156201] [2020-10-05 23:14:17,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883589314] [2020-10-05 23:14:17,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:17,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:14:17,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:17,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:17,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:17,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:17,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:17,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:17,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132145209] [2020-10-05 23:14:17,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:17,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:17,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:17,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:17,849 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 23:14:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:18,679 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-05 23:14:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:14:18,680 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:18,680 INFO L225 Difference]: With dead ends: 109 [2020-10-05 23:14:18,680 INFO L226 Difference]: Without dead ends: 103 [2020-10-05 23:14:18,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 23:14:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-05 23:14:18,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-05 23:14:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:18,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:18,682 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 23:14:18,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:18,683 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:18,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:18,683 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:18,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:18,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:18,684 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:18,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:18,884 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:18,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:18,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-05 23:14:18,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:18,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389235348] [2020-10-05 23:14:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:19,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389235348] [2020-10-05 23:14:19,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824494277] [2020-10-05 23:14:19,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:19,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 23:14:19,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:19,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:19,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:19,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:19,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:19,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83828055] [2020-10-05 23:14:19,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:19,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:19,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:19,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:19,171 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 23:14:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:19,893 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-05 23:14:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:14:19,894 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:19,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:19,894 INFO L225 Difference]: With dead ends: 106 [2020-10-05 23:14:19,895 INFO L226 Difference]: Without dead ends: 100 [2020-10-05 23:14:19,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:14:19,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-05 23:14:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-05 23:14:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:19,897 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 23:14:19,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:19,898 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:19,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:19,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:19,898 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:20,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-05 23:14:20,106 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:20,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:20,106 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-05 23:14:20,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:20,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717954920] [2020-10-05 23:14:20,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:20,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717954920] [2020-10-05 23:14:20,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081135770] [2020-10-05 23:14:20,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:20,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 23:14:20,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:20,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:20,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:20,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:20,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:20,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:20,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612460955] [2020-10-05 23:14:20,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:20,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:20,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:20,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:20,410 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 23:14:21,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:21,333 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-05 23:14:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:14:21,334 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:21,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:21,334 INFO L225 Difference]: With dead ends: 105 [2020-10-05 23:14:21,335 INFO L226 Difference]: Without dead ends: 99 [2020-10-05 23:14:21,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:14:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-05 23:14:21,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-05 23:14:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:21,337 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 23:14:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:21,337 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:21,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:21,337 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:21,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:21,338 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:21,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:21,538 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:21,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:21,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-05 23:14:21,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:21,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302977743] [2020-10-05 23:14:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:21,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302977743] [2020-10-05 23:14:21,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782312789] [2020-10-05 23:14:21,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:21,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:21,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:21,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:21,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:21,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649886225] [2020-10-05 23:14:21,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:21,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:21,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:21,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:21,813 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 23:14:22,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:22,604 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-05 23:14:22,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:14:22,605 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:22,605 INFO L225 Difference]: With dead ends: 102 [2020-10-05 23:14:22,605 INFO L226 Difference]: Without dead ends: 96 [2020-10-05 23:14:22,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 23:14:22,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-05 23:14:22,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-05 23:14:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:22,608 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 23:14:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:22,608 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:22,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:22,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:22,609 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:22,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:22,810 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:22,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:22,810 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-05 23:14:22,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:22,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45405960] [2020-10-05 23:14:22,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:23,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45405960] [2020-10-05 23:14:23,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753026235] [2020-10-05 23:14:23,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:23,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:14:23,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:23,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:23,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:23,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:23,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:23,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:23,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955064310] [2020-10-05 23:14:23,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:23,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:23,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:23,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:23,109 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 23:14:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:24,125 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-05 23:14:24,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 23:14:24,126 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:24,126 INFO L225 Difference]: With dead ends: 101 [2020-10-05 23:14:24,126 INFO L226 Difference]: Without dead ends: 95 [2020-10-05 23:14:24,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 23:14:24,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-05 23:14:24,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-05 23:14:24,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:24,129 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 23:14:24,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:24,129 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:24,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:24,129 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:24,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:24,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:24,130 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:24,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-05 23:14:24,332 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:24,332 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-05 23:14:24,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:24,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070503605] [2020-10-05 23:14:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:24,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070503605] [2020-10-05 23:14:24,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396057162] [2020-10-05 23:14:24,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:24,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-05 23:14:24,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:24,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:24,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:24,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:24,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:24,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037875196] [2020-10-05 23:14:24,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:24,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:24,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:24,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:24,609 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 23:14:25,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:25,455 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-05 23:14:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 23:14:25,456 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:25,457 INFO L225 Difference]: With dead ends: 98 [2020-10-05 23:14:25,457 INFO L226 Difference]: Without dead ends: 92 [2020-10-05 23:14:25,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:14:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-05 23:14:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-05 23:14:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:25,460 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 23:14:25,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:25,460 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:25,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:25,460 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:25,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:25,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:25,461 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:25,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:25,662 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:25,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:25,662 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-05 23:14:25,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:25,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479593857] [2020-10-05 23:14:25,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:25,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479593857] [2020-10-05 23:14:25,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599031711] [2020-10-05 23:14:25,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:25,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:14:25,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:25,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:25,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:25,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:25,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:25,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178327758] [2020-10-05 23:14:25,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:25,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:25,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:25,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:25,954 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 23:14:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:27,082 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-05 23:14:27,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 23:14:27,083 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:27,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:27,084 INFO L225 Difference]: With dead ends: 97 [2020-10-05 23:14:27,084 INFO L226 Difference]: Without dead ends: 91 [2020-10-05 23:14:27,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-05 23:14:27,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-05 23:14:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-05 23:14:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:27,086 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 23:14:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:27,087 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:27,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:27,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:27,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:27,087 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:27,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-05 23:14:27,288 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:27,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:27,288 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-05 23:14:27,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:27,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450330769] [2020-10-05 23:14:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:27,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450330769] [2020-10-05 23:14:27,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705372689] [2020-10-05 23:14:27,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:27,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 23:14:27,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:27,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:27,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:27,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:27,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:27,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407258028] [2020-10-05 23:14:27,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:27,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:27,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:27,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:27,569 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 23:14:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:28,479 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-05 23:14:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:14:28,480 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:28,480 INFO L225 Difference]: With dead ends: 113 [2020-10-05 23:14:28,480 INFO L226 Difference]: Without dead ends: 107 [2020-10-05 23:14:28,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 23:14:28,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-05 23:14:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-05 23:14:28,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-05 23:14:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-05 23:14:28,483 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-05 23:14:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:28,483 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-05 23:14:28,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-05 23:14:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:28,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:28,484 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:28,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-05 23:14:28,685 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:28,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:28,685 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-05 23:14:28,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:28,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470095727] [2020-10-05 23:14:28,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:28,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470095727] [2020-10-05 23:14:28,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383872443] [2020-10-05 23:14:28,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:28,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 23:14:28,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:28,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:28,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:28,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:29,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:29,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:29,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797129288] [2020-10-05 23:14:29,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:29,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:29,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:29,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:29,007 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-05 23:14:30,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:30,172 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-05 23:14:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-05 23:14:30,173 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:30,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:30,174 INFO L225 Difference]: With dead ends: 94 [2020-10-05 23:14:30,174 INFO L226 Difference]: Without dead ends: 86 [2020-10-05 23:14:30,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 23:14:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-05 23:14:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-05 23:14:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-05 23:14:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-05 23:14:30,176 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-05 23:14:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:30,177 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-05 23:14:30,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-05 23:14:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:30,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:30,177 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:30,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-05 23:14:30,378 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:30,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:30,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-05 23:14:30,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:30,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102847909] [2020-10-05 23:14:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:30,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102847909] [2020-10-05 23:14:30,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186737675] [2020-10-05 23:14:30,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:30,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:30,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:30,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:14:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:30,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:30,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:30,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701549766] [2020-10-05 23:14:30,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:30,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:30,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:30,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:30,678 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-05 23:14:31,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:31,769 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-05 23:14:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:14:31,770 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:31,771 INFO L225 Difference]: With dead ends: 108 [2020-10-05 23:14:31,771 INFO L226 Difference]: Without dead ends: 103 [2020-10-05 23:14:31,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 23:14:31,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-05 23:14:31,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-05 23:14:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 23:14:31,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-05 23:14:31,774 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-05 23:14:31,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:31,774 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-05 23:14:31,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:31,774 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-05 23:14:31,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:31,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:31,775 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:31,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-05 23:14:31,975 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:31,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:31,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-05 23:14:31,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:31,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740881621] [2020-10-05 23:14:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:32,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740881621] [2020-10-05 23:14:32,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799872017] [2020-10-05 23:14:32,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:32,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:14:32,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:32,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:32,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:32,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:14:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:32,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:32,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:32,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956052025] [2020-10-05 23:14:32,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:32,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:32,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:32,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:32,308 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-05 23:14:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:33,491 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-05 23:14:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:14:33,492 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:33,492 INFO L225 Difference]: With dead ends: 90 [2020-10-05 23:14:33,492 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 23:14:33,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-05 23:14:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 23:14:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-05 23:14:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:14:33,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-05 23:14:33,495 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-05 23:14:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:33,495 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-05 23:14:33,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:33,496 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-05 23:14:33,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:33,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:33,496 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:33,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:33,697 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:33,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:33,697 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-05 23:14:33,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:33,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112909310] [2020-10-05 23:14:33,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:33,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112909310] [2020-10-05 23:14:33,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314596970] [2020-10-05 23:14:33,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:34,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 23:14:34,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:34,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:34,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:34,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:34,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:34,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883129002] [2020-10-05 23:14:34,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:34,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:34,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:34,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:34,063 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-05 23:14:34,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:34,545 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-05 23:14:34,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:14:34,546 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:34,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:34,546 INFO L225 Difference]: With dead ends: 96 [2020-10-05 23:14:34,547 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 23:14:34,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 23:14:34,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 23:14:34,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-05 23:14:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 23:14:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-05 23:14:34,549 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-05 23:14:34,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:34,549 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-05 23:14:34,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-05 23:14:34,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:34,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:34,550 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:34,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:34,751 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:34,752 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-05 23:14:34,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:34,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147841186] [2020-10-05 23:14:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:35,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147841186] [2020-10-05 23:14:35,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146356980] [2020-10-05 23:14:35,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:35,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:14:35,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:35,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:35,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:35,137 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:35,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:35,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:35,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834954973] [2020-10-05 23:14:35,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:35,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:35,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:35,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:35,150 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-05 23:14:35,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:35,702 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-05 23:14:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:14:35,702 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:35,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:35,703 INFO L225 Difference]: With dead ends: 114 [2020-10-05 23:14:35,703 INFO L226 Difference]: Without dead ends: 108 [2020-10-05 23:14:35,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 23:14:35,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-05 23:14:35,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-05 23:14:35,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:14:35,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-05 23:14:35,705 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-05 23:14:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:35,705 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-05 23:14:35,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:35,706 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-05 23:14:35,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:35,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:35,706 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:35,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:35,907 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:35,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:35,907 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-05 23:14:35,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:35,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893578150] [2020-10-05 23:14:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:36,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893578150] [2020-10-05 23:14:36,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38177074] [2020-10-05 23:14:36,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:36,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 23:14:36,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:36,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:36,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:36,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:36,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:36,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269784925] [2020-10-05 23:14:36,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:36,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:36,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:36,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:36,270 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-05 23:14:36,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:36,874 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-05 23:14:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:14:36,875 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:36,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:36,875 INFO L225 Difference]: With dead ends: 115 [2020-10-05 23:14:36,876 INFO L226 Difference]: Without dead ends: 109 [2020-10-05 23:14:36,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 23:14:36,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-05 23:14:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-05 23:14:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-05 23:14:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-05 23:14:36,878 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-05 23:14:36,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:36,878 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-05 23:14:36,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:36,878 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-05 23:14:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:36,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:36,878 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:37,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:37,079 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:37,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:37,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-05 23:14:37,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:37,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284468807] [2020-10-05 23:14:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:37,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284468807] [2020-10-05 23:14:37,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930473376] [2020-10-05 23:14:37,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:37,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 23:14:37,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:37,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:37,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:37,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:37,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:37,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:37,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430078420] [2020-10-05 23:14:37,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:37,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:37,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:37,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:37,477 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-05 23:14:38,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:38,107 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-05 23:14:38,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:14:38,108 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:38,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:38,108 INFO L225 Difference]: With dead ends: 129 [2020-10-05 23:14:38,109 INFO L226 Difference]: Without dead ends: 123 [2020-10-05 23:14:38,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:14:38,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-05 23:14:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-05 23:14:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 23:14:38,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-05 23:14:38,111 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-05 23:14:38,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:38,112 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-05 23:14:38,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:38,112 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-05 23:14:38,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:38,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:38,112 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:38,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:38,313 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:38,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:38,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-05 23:14:38,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:38,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509803579] [2020-10-05 23:14:38,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:38,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509803579] [2020-10-05 23:14:38,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638479540] [2020-10-05 23:14:38,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:38,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:38,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:38,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:38,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:38,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453658633] [2020-10-05 23:14:38,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:38,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:38,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:38,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:38,658 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-05 23:14:39,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:39,307 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-05 23:14:39,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:14:39,308 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:39,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:39,309 INFO L225 Difference]: With dead ends: 129 [2020-10-05 23:14:39,309 INFO L226 Difference]: Without dead ends: 123 [2020-10-05 23:14:39,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:14:39,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-05 23:14:39,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-05 23:14:39,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-05 23:14:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-05 23:14:39,312 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-05 23:14:39,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:39,312 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-05 23:14:39,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:39,313 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-05 23:14:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:39,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:39,313 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:39,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:39,516 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:39,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:39,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-05 23:14:39,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:39,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588817637] [2020-10-05 23:14:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:39,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588817637] [2020-10-05 23:14:39,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110178100] [2020-10-05 23:14:39,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:39,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:14:39,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:39,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:39,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:39,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:39,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:39,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:39,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987735261] [2020-10-05 23:14:39,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:39,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:39,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:39,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:39,886 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-05 23:14:40,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:40,623 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-05 23:14:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:14:40,624 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:40,625 INFO L225 Difference]: With dead ends: 126 [2020-10-05 23:14:40,625 INFO L226 Difference]: Without dead ends: 120 [2020-10-05 23:14:40,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:14:40,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-05 23:14:40,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-05 23:14:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-05 23:14:40,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-05 23:14:40,628 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-05 23:14:40,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:40,628 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-05 23:14:40,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-05 23:14:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:40,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:40,629 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:40,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:40,829 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:40,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:40,830 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-05 23:14:40,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:40,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897837360] [2020-10-05 23:14:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:41,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897837360] [2020-10-05 23:14:41,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256344189] [2020-10-05 23:14:41,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:41,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 23:14:41,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:41,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:41,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:41,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:41,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:41,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628338412] [2020-10-05 23:14:41,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:41,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:41,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:41,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:41,164 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-05 23:14:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:41,879 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-05 23:14:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:14:41,879 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:41,880 INFO L225 Difference]: With dead ends: 127 [2020-10-05 23:14:41,880 INFO L226 Difference]: Without dead ends: 121 [2020-10-05 23:14:41,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 23:14:41,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-05 23:14:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-05 23:14:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:14:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-05 23:14:41,882 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-05 23:14:41,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:41,883 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-05 23:14:41,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-05 23:14:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:41,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:41,884 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:42,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-05 23:14:42,093 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:42,093 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-05 23:14:42,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:42,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336807849] [2020-10-05 23:14:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:42,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336807849] [2020-10-05 23:14:42,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546509760] [2020-10-05 23:14:42,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:42,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:14:42,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:42,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:42,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:42,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:42,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:42,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:42,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373964720] [2020-10-05 23:14:42,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:42,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:42,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:42,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:42,449 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-05 23:14:43,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:43,289 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-05 23:14:43,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:14:43,290 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:43,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:43,290 INFO L225 Difference]: With dead ends: 124 [2020-10-05 23:14:43,290 INFO L226 Difference]: Without dead ends: 118 [2020-10-05 23:14:43,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 23:14:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-05 23:14:43,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-05 23:14:43,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:14:43,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-05 23:14:43,292 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-05 23:14:43,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:43,292 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-05 23:14:43,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-05 23:14:43,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:43,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:43,293 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:43,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-05 23:14:43,494 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:43,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-05 23:14:43,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:43,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431676263] [2020-10-05 23:14:43,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:43,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431676263] [2020-10-05 23:14:43,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908319145] [2020-10-05 23:14:43,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:43,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 23:14:43,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:43,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:43,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:43,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:43,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:43,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348181875] [2020-10-05 23:14:43,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:43,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:43,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:43,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:43,829 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-05 23:14:44,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:44,611 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-05 23:14:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:14:44,612 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:44,612 INFO L225 Difference]: With dead ends: 125 [2020-10-05 23:14:44,612 INFO L226 Difference]: Without dead ends: 119 [2020-10-05 23:14:44,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:14:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-05 23:14:44,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-05 23:14:44,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-05 23:14:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-05 23:14:44,615 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-05 23:14:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:44,615 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-05 23:14:44,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-05 23:14:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:44,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:44,615 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:44,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-05 23:14:44,816 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:44,816 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-05 23:14:44,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:44,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376590884] [2020-10-05 23:14:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:45,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376590884] [2020-10-05 23:14:45,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241453244] [2020-10-05 23:14:45,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:45,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 23:14:45,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:45,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:45,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:45,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:45,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:45,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:45,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840509574] [2020-10-05 23:14:45,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:45,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:45,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:45,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:45,178 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-05 23:14:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:46,071 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-05 23:14:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:14:46,072 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:46,072 INFO L225 Difference]: With dead ends: 122 [2020-10-05 23:14:46,072 INFO L226 Difference]: Without dead ends: 116 [2020-10-05 23:14:46,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:14:46,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-05 23:14:46,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-05 23:14:46,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 23:14:46,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-05 23:14:46,075 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-05 23:14:46,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:46,076 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-05 23:14:46,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:46,076 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-05 23:14:46,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:46,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:46,076 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:46,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-05 23:14:46,278 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:46,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:46,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-05 23:14:46,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:46,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288689064] [2020-10-05 23:14:46,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:46,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288689064] [2020-10-05 23:14:46,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710097498] [2020-10-05 23:14:46,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:46,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:46,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:46,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:46,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:46,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784987616] [2020-10-05 23:14:46,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:46,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:46,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:46,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:46,592 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-05 23:14:47,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:47,434 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-05 23:14:47,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 23:14:47,435 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:47,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:47,435 INFO L225 Difference]: With dead ends: 123 [2020-10-05 23:14:47,435 INFO L226 Difference]: Without dead ends: 117 [2020-10-05 23:14:47,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 23:14:47,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-05 23:14:47,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-05 23:14:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-05 23:14:47,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-05 23:14:47,438 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-05 23:14:47,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:47,438 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-05 23:14:47,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-05 23:14:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:47,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:47,439 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:47,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:47,640 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:47,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:47,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-05 23:14:47,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:47,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431127089] [2020-10-05 23:14:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:47,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431127089] [2020-10-05 23:14:47,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320330020] [2020-10-05 23:14:47,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:47,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:14:47,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:47,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:47,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:47,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:47,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:47,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:47,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047943580] [2020-10-05 23:14:47,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:47,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:47,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:47,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:47,973 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-05 23:14:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:48,989 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-05 23:14:48,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 23:14:48,990 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:48,991 INFO L225 Difference]: With dead ends: 120 [2020-10-05 23:14:48,991 INFO L226 Difference]: Without dead ends: 114 [2020-10-05 23:14:48,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 23:14:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-05 23:14:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-05 23:14:48,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-05 23:14:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-05 23:14:48,994 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-05 23:14:48,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:48,994 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-05 23:14:48,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:48,994 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-05 23:14:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:48,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:48,995 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:49,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:49,195 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:49,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:49,196 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-05 23:14:49,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:49,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513681244] [2020-10-05 23:14:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:49,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513681244] [2020-10-05 23:14:49,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473639236] [2020-10-05 23:14:49,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:49,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 23:14:49,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:49,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:49,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:49,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:49,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:49,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211284177] [2020-10-05 23:14:49,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:49,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:49,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:49,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:49,515 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-05 23:14:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:50,423 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-05 23:14:50,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:14:50,424 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:50,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:50,425 INFO L225 Difference]: With dead ends: 121 [2020-10-05 23:14:50,425 INFO L226 Difference]: Without dead ends: 115 [2020-10-05 23:14:50,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-05 23:14:50,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-05 23:14:50,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-05 23:14:50,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:50,428 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-05 23:14:50,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:50,428 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:50,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:50,428 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:50,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:50,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:50,428 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:50,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-05 23:14:50,629 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:50,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:50,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-05 23:14:50,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:50,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486228442] [2020-10-05 23:14:50,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:50,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486228442] [2020-10-05 23:14:50,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789649809] [2020-10-05 23:14:50,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:50,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:14:50,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:50,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:50,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:50,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:50,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:50,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:50,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983199991] [2020-10-05 23:14:50,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:50,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:50,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:50,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:50,962 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-05 23:14:52,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:52,156 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-05 23:14:52,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 23:14:52,157 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:52,157 INFO L225 Difference]: With dead ends: 118 [2020-10-05 23:14:52,158 INFO L226 Difference]: Without dead ends: 112 [2020-10-05 23:14:52,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-05 23:14:52,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-05 23:14:52,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-05 23:14:52,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:52,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:52,160 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-05 23:14:52,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:52,161 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:52,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:52,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:52,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:52,161 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:52,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:52,362 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:52,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:52,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-05 23:14:52,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:52,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326548770] [2020-10-05 23:14:52,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:52,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326548770] [2020-10-05 23:14:52,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726991096] [2020-10-05 23:14:52,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:52,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 23:14:52,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:52,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:52,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:52,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:52,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:52,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004496758] [2020-10-05 23:14:52,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:52,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:52,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:52,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:52,669 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-05 23:14:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:53,641 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-05 23:14:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-05 23:14:53,642 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:53,643 INFO L225 Difference]: With dead ends: 119 [2020-10-05 23:14:53,643 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 23:14:53,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 23:14:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 23:14:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-05 23:14:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-05 23:14:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-05 23:14:53,646 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-05 23:14:53,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:53,646 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-05 23:14:53,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-05 23:14:53,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:53,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:53,647 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:53,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:53,856 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:53,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:53,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-05 23:14:53,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:53,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949334729] [2020-10-05 23:14:53,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:54,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949334729] [2020-10-05 23:14:54,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700740073] [2020-10-05 23:14:54,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:14:54,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 23:14:54,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:54,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:54,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:54,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:54,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:54,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:54,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031995325] [2020-10-05 23:14:54,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:54,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:54,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:54,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:54,193 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-05 23:14:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:55,387 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-05 23:14:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-05 23:14:55,388 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:55,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:55,388 INFO L225 Difference]: With dead ends: 116 [2020-10-05 23:14:55,388 INFO L226 Difference]: Without dead ends: 110 [2020-10-05 23:14:55,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-05 23:14:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-05 23:14:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-05 23:14:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 23:14:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-05 23:14:55,393 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-05 23:14:55,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:55,393 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-05 23:14:55,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-05 23:14:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:55,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:55,393 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:55,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:55,602 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:55,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:55,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-05 23:14:55,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:55,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303492881] [2020-10-05 23:14:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:55,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303492881] [2020-10-05 23:14:55,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222987227] [2020-10-05 23:14:55,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:55,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:55,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:55,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:55,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:55,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653941681] [2020-10-05 23:14:55,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:55,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:55,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:55,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:55,918 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-05 23:14:56,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:56,956 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-05 23:14:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 23:14:56,957 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:56,957 INFO L225 Difference]: With dead ends: 136 [2020-10-05 23:14:56,958 INFO L226 Difference]: Without dead ends: 130 [2020-10-05 23:14:56,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-05 23:14:56,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-05 23:14:56,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-05 23:14:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-05 23:14:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-05 23:14:56,961 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-05 23:14:56,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:56,961 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-05 23:14:56,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:56,961 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-05 23:14:56,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:56,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:56,962 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:57,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:57,169 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:57,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:57,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-05 23:14:57,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:57,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904669537] [2020-10-05 23:14:57,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:57,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904669537] [2020-10-05 23:14:57,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45316557] [2020-10-05 23:14:57,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:57,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:14:57,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:57,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:57,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:57,468 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:57,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:57,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:57,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724890400] [2020-10-05 23:14:57,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:57,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:57,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:57,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:57,508 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-05 23:14:58,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:58,764 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-05 23:14:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-05 23:14:58,765 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:58,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:58,765 INFO L225 Difference]: With dead ends: 117 [2020-10-05 23:14:58,765 INFO L226 Difference]: Without dead ends: 109 [2020-10-05 23:14:58,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-05 23:14:58,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-05 23:14:58,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-05 23:14:58,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-05 23:14:58,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-05 23:14:58,768 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-05 23:14:58,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:58,768 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-05 23:14:58,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:58,768 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-05 23:14:58,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:14:58,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:58,769 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:58,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:58,970 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:58,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:58,971 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-05 23:14:58,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:58,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853001793] [2020-10-05 23:14:58,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:59,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853001793] [2020-10-05 23:14:59,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926307606] [2020-10-05 23:14:59,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:59,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 23:14:59,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:59,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:14:59,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:59,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:59,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:14:59,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257526521] [2020-10-05 23:14:59,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:59,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:59,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:59,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:59,370 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-05 23:14:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:59,948 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-05 23:14:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:14:59,949 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:14:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:59,950 INFO L225 Difference]: With dead ends: 134 [2020-10-05 23:14:59,950 INFO L226 Difference]: Without dead ends: 128 [2020-10-05 23:14:59,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 23:14:59,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-05 23:14:59,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-05 23:14:59,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:14:59,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:14:59,952 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:14:59,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:59,952 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:14:59,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:14:59,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:14:59,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:59,953 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:00,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-05 23:15:00,154 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:00,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:00,154 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-05 23:15:00,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:00,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018012587] [2020-10-05 23:15:00,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:00,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018012587] [2020-10-05 23:15:00,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350924965] [2020-10-05 23:15:00,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:00,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:15:00,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:00,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:00,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:00,575 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:00,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:00,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:00,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966054091] [2020-10-05 23:15:00,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:00,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:00,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:00,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:00,587 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:15:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:01,268 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-05 23:15:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:15:01,269 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:01,270 INFO L225 Difference]: With dead ends: 131 [2020-10-05 23:15:01,270 INFO L226 Difference]: Without dead ends: 125 [2020-10-05 23:15:01,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:15:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-05 23:15:01,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-05 23:15:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:01,272 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:15:01,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:01,273 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:01,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:01,273 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:01,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:01,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:01,273 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:01,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-05 23:15:01,474 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:01,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:01,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-05 23:15:01,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:01,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636947719] [2020-10-05 23:15:01,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:01,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636947719] [2020-10-05 23:15:01,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798871850] [2020-10-05 23:15:01,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:01,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 23:15:01,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:01,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:01,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:01,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:01,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:15:01,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287554432] [2020-10-05 23:15:01,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:15:01,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:01,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:15:01,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:15:01,871 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:15:02,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:02,530 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-05 23:15:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:15:02,531 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:15:02,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:02,531 INFO L225 Difference]: With dead ends: 128 [2020-10-05 23:15:02,532 INFO L226 Difference]: Without dead ends: 122 [2020-10-05 23:15:02,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:15:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-05 23:15:02,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-05 23:15:02,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:15:02,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:15:02,534 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:15:02,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:02,534 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:15:02,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:15:02,535 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:15:02,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:02,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:02,535 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:02,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:02,736 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:02,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:02,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-05 23:15:02,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:02,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895702165] [2020-10-05 23:15:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:03,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895702165] [2020-10-05 23:15:03,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592216136] [2020-10-05 23:15:03,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:03,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 23:15:03,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:03,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:03,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:03,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:03,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:03,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:03,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293897098] [2020-10-05 23:15:03,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:03,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:03,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:03,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:03,152 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:15:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:03,907 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-05 23:15:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:15:03,908 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:03,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:03,909 INFO L225 Difference]: With dead ends: 127 [2020-10-05 23:15:03,909 INFO L226 Difference]: Without dead ends: 121 [2020-10-05 23:15:03,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 23:15:03,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-05 23:15:03,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-05 23:15:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:03,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:03,912 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:15:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:03,912 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:03,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:03,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:03,913 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:04,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-05 23:15:04,114 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:04,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-05 23:15:04,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:04,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148197454] [2020-10-05 23:15:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:04,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148197454] [2020-10-05 23:15:04,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130197014] [2020-10-05 23:15:04,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:04,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:04,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:04,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:15:04,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680986797] [2020-10-05 23:15:04,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:15:04,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:04,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:15:04,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:15:04,477 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:15:05,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:05,202 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-05 23:15:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:15:05,203 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:15:05,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:05,204 INFO L225 Difference]: With dead ends: 124 [2020-10-05 23:15:05,204 INFO L226 Difference]: Without dead ends: 118 [2020-10-05 23:15:05,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:15:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-05 23:15:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-05 23:15:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:15:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:15:05,206 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:15:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:05,207 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:15:05,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:15:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:15:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:05,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:05,207 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:05,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:05,408 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:05,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-05 23:15:05,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:05,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996704605] [2020-10-05 23:15:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:05,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996704605] [2020-10-05 23:15:05,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202138626] [2020-10-05 23:15:05,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:05,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:15:05,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:05,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:05,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:05,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:05,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:05,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:05,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110977343] [2020-10-05 23:15:05,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:05,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:05,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:05,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:05,811 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:15:06,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:06,700 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-05 23:15:06,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:15:06,701 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:06,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:06,701 INFO L225 Difference]: With dead ends: 123 [2020-10-05 23:15:06,702 INFO L226 Difference]: Without dead ends: 117 [2020-10-05 23:15:06,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:15:06,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-05 23:15:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-05 23:15:06,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:06,704 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:15:06,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:06,705 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:06,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:06,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:06,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:06,706 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:06,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:06,906 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:06,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:06,907 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-05 23:15:06,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:06,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578972078] [2020-10-05 23:15:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:07,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578972078] [2020-10-05 23:15:07,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257556325] [2020-10-05 23:15:07,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:07,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 23:15:07,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:07,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:07,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:07,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:07,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:15:07,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329528263] [2020-10-05 23:15:07,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:15:07,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:07,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:15:07,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:15:07,270 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:15:08,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:08,051 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-05 23:15:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:15:08,052 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:15:08,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:08,053 INFO L225 Difference]: With dead ends: 120 [2020-10-05 23:15:08,053 INFO L226 Difference]: Without dead ends: 114 [2020-10-05 23:15:08,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 23:15:08,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-05 23:15:08,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-05 23:15:08,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:15:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:15:08,056 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:15:08,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:08,056 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:15:08,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:15:08,056 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:15:08,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:08,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:08,057 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:08,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:08,258 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:08,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:08,258 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-05 23:15:08,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:08,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680917474] [2020-10-05 23:15:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:08,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680917474] [2020-10-05 23:15:08,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017812918] [2020-10-05 23:15:08,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:08,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:15:08,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:08,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:08,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:08,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:08,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:08,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:08,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557856642] [2020-10-05 23:15:08,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:08,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:08,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:08,655 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:15:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:09,636 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-05 23:15:09,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:15:09,636 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:09,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:09,637 INFO L225 Difference]: With dead ends: 119 [2020-10-05 23:15:09,637 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 23:15:09,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 23:15:09,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 23:15:09,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-05 23:15:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:09,640 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:15:09,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:09,640 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:09,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:09,640 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:09,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:09,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:09,641 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:09,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:09,849 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:09,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:09,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-05 23:15:09,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:09,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052452853] [2020-10-05 23:15:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:10,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052452853] [2020-10-05 23:15:10,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008187370] [2020-10-05 23:15:10,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:10,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 23:15:10,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:10,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:10,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:10,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:10,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:15:10,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994616506] [2020-10-05 23:15:10,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:15:10,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:10,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:15:10,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:15:10,200 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:15:11,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:11,057 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-05 23:15:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:15:11,058 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:15:11,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:11,058 INFO L225 Difference]: With dead ends: 116 [2020-10-05 23:15:11,058 INFO L226 Difference]: Without dead ends: 110 [2020-10-05 23:15:11,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:15:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-05 23:15:11,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-05 23:15:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:15:11,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:15:11,061 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:15:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:11,061 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:15:11,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:15:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:15:11,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:11,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:11,061 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:11,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-05 23:15:11,262 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:11,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:11,262 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-05 23:15:11,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:11,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138141720] [2020-10-05 23:15:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:11,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138141720] [2020-10-05 23:15:11,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988391378] [2020-10-05 23:15:11,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:11,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 23:15:11,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:11,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:11,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:11,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:11,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:11,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:11,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741557331] [2020-10-05 23:15:11,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:11,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:11,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:11,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:11,647 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:15:12,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:12,729 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-05 23:15:12,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 23:15:12,730 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:12,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:12,731 INFO L225 Difference]: With dead ends: 115 [2020-10-05 23:15:12,731 INFO L226 Difference]: Without dead ends: 109 [2020-10-05 23:15:12,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-05 23:15:12,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-05 23:15:12,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-05 23:15:12,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:12,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:12,735 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:15:12,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:12,735 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:12,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:12,735 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:12,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:12,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:12,736 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:12,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:12,945 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:12,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-05 23:15:12,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:12,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034104753] [2020-10-05 23:15:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:13,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034104753] [2020-10-05 23:15:13,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020202723] [2020-10-05 23:15:13,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:13,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:13,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:13,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:13,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:15:13,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924321353] [2020-10-05 23:15:13,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:15:13,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:13,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:15:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:15:13,288 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:15:14,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:14,234 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-05 23:15:14,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 23:15:14,235 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:15:14,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:14,235 INFO L225 Difference]: With dead ends: 112 [2020-10-05 23:15:14,235 INFO L226 Difference]: Without dead ends: 106 [2020-10-05 23:15:14,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 23:15:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-05 23:15:14,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-05 23:15:14,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:15:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:15:14,238 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:15:14,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:14,238 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:15:14,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:15:14,238 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:15:14,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:14,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:14,238 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:14,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-05 23:15:14,439 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:14,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:14,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-05 23:15:14,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:14,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977359154] [2020-10-05 23:15:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:14,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977359154] [2020-10-05 23:15:14,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154047655] [2020-10-05 23:15:14,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:14,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:15:14,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:14,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:14,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:14,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:14,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:14,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:14,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167504542] [2020-10-05 23:15:14,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:14,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:14,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:14,816 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:15:16,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:16,015 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-05 23:15:16,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 23:15:16,016 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:16,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:16,017 INFO L225 Difference]: With dead ends: 111 [2020-10-05 23:15:16,017 INFO L226 Difference]: Without dead ends: 105 [2020-10-05 23:15:16,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 23:15:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-05 23:15:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-05 23:15:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:16,019 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:15:16,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:16,020 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:16,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:16,020 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:16,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:16,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:16,020 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:16,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-05 23:15:16,221 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:16,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:16,221 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-05 23:15:16,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:16,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506512651] [2020-10-05 23:15:16,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:16,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506512651] [2020-10-05 23:15:16,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768979588] [2020-10-05 23:15:16,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:16,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 23:15:16,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:16,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:16,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:16,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:16,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:15:16,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172205459] [2020-10-05 23:15:16,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:15:16,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:16,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:15:16,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:15:16,570 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:15:17,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:17,605 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-05 23:15:17,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:15:17,605 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:15:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:17,606 INFO L225 Difference]: With dead ends: 108 [2020-10-05 23:15:17,606 INFO L226 Difference]: Without dead ends: 102 [2020-10-05 23:15:17,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-05 23:15:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-05 23:15:17,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-05 23:15:17,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:15:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:15:17,609 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:15:17,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:17,609 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:15:17,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:15:17,609 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:15:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:17,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:17,609 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:17,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:17,813 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:17,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:17,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-05 23:15:17,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:17,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928218787] [2020-10-05 23:15:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:18,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928218787] [2020-10-05 23:15:18,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666529373] [2020-10-05 23:15:18,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:18,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:15:18,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:18,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:18,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:18,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:18,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:18,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:18,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425874518] [2020-10-05 23:15:18,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:18,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:18,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:18,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:18,192 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:15:19,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:19,527 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-05 23:15:19,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-05 23:15:19,527 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:19,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:19,528 INFO L225 Difference]: With dead ends: 107 [2020-10-05 23:15:19,528 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 23:15:19,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-05 23:15:19,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 23:15:19,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-05 23:15:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:19,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:19,531 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:15:19,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:19,531 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:19,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:19,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:19,532 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:19,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:19,737 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:19,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:19,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-05 23:15:19,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:19,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420959466] [2020-10-05 23:15:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:19,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420959466] [2020-10-05 23:15:19,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561828968] [2020-10-05 23:15:19,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:20,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 23:15:20,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:20,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:20,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:20,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:20,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:15:20,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131036710] [2020-10-05 23:15:20,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:15:20,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:20,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:15:20,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:15:20,078 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:15:21,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:21,194 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-05 23:15:21,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-05 23:15:21,195 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:15:21,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:21,196 INFO L225 Difference]: With dead ends: 104 [2020-10-05 23:15:21,196 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 23:15:21,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-05 23:15:21,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 23:15:21,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-05 23:15:21,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:15:21,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:15:21,198 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:15:21,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:21,199 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:15:21,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:15:21,199 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:15:21,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:21,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:21,199 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:21,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:21,400 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:21,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:21,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-05 23:15:21,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:21,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686861300] [2020-10-05 23:15:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:21,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686861300] [2020-10-05 23:15:21,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733401308] [2020-10-05 23:15:21,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:21,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 23:15:21,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:21,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:21,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:21,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:21,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:21,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:21,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127690027] [2020-10-05 23:15:21,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:21,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:21,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:21,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:21,777 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:15:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:23,214 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-05 23:15:23,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-05 23:15:23,215 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:23,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:23,215 INFO L225 Difference]: With dead ends: 103 [2020-10-05 23:15:23,215 INFO L226 Difference]: Without dead ends: 97 [2020-10-05 23:15:23,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-05 23:15:23,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-05 23:15:23,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-05 23:15:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:23,219 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:15:23,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:23,219 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:23,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:23,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:23,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:23,220 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:23,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-05 23:15:23,428 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:23,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:23,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-05 23:15:23,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:23,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890116481] [2020-10-05 23:15:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:23,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890116481] [2020-10-05 23:15:23,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316752368] [2020-10-05 23:15:23,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:23,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:23,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:23,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:23,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:15:23,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847913364] [2020-10-05 23:15:23,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:15:23,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:23,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:15:23,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:15:23,775 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:15:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:24,949 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-05 23:15:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 23:15:24,950 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:15:24,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:24,951 INFO L225 Difference]: With dead ends: 119 [2020-10-05 23:15:24,951 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 23:15:24,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-05 23:15:24,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 23:15:24,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-05 23:15:24,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-05 23:15:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-05 23:15:24,954 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-05 23:15:24,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:24,955 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-05 23:15:24,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:15:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-05 23:15:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:24,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:24,955 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:25,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:25,156 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:25,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:25,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-05 23:15:25,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:25,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37670218] [2020-10-05 23:15:25,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:25,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37670218] [2020-10-05 23:15:25,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796998918] [2020-10-05 23:15:25,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:25,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:15:25,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:25,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:25,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:25,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:25,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:25,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:25,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222087127] [2020-10-05 23:15:25,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:25,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:25,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:25,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:25,518 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-05 23:15:26,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:26,993 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-05 23:15:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-05 23:15:26,994 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:26,994 INFO L225 Difference]: With dead ends: 100 [2020-10-05 23:15:26,994 INFO L226 Difference]: Without dead ends: 92 [2020-10-05 23:15:26,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-05 23:15:26,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-05 23:15:26,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-05 23:15:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-05 23:15:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-05 23:15:26,996 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-05 23:15:26,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:26,996 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-05 23:15:26,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-05 23:15:26,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:26,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:26,997 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:27,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:27,197 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:27,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:27,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-05 23:15:27,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:27,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679133165] [2020-10-05 23:15:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:27,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679133165] [2020-10-05 23:15:27,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877971216] [2020-10-05 23:15:27,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:27,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 23:15:27,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:27,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:27,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:27,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:15:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:27,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:27,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:27,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513549613] [2020-10-05 23:15:27,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:27,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:27,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:27,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:27,577 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-05 23:15:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:28,957 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-05 23:15:28,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 23:15:28,958 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:28,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:28,959 INFO L225 Difference]: With dead ends: 116 [2020-10-05 23:15:28,959 INFO L226 Difference]: Without dead ends: 111 [2020-10-05 23:15:28,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-05 23:15:28,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-05 23:15:28,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-05 23:15:28,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-05 23:15:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-05 23:15:28,961 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-05 23:15:28,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:28,962 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-05 23:15:28,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:28,962 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-05 23:15:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:28,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:28,962 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:29,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:29,163 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:29,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:29,163 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-05 23:15:29,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:29,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673594784] [2020-10-05 23:15:29,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:29,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673594784] [2020-10-05 23:15:29,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157145926] [2020-10-05 23:15:29,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:29,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:15:29,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:29,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:29,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:29,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:15:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:29,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:29,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:29,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383152211] [2020-10-05 23:15:29,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:29,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:29,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:29,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:29,573 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-05 23:15:31,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:31,074 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-05 23:15:31,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 23:15:31,075 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:31,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:31,075 INFO L225 Difference]: With dead ends: 96 [2020-10-05 23:15:31,076 INFO L226 Difference]: Without dead ends: 91 [2020-10-05 23:15:31,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-05 23:15:31,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-05 23:15:31,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-05 23:15:31,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 23:15:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-05 23:15:31,077 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-05 23:15:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:31,077 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-05 23:15:31,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-05 23:15:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:31,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:31,078 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:31,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:31,279 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:31,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:31,280 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-05 23:15:31,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:31,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749495896] [2020-10-05 23:15:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:31,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749495896] [2020-10-05 23:15:31,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425781067] [2020-10-05 23:15:31,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:31,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-05 23:15:31,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:31,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:31,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:31,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:31,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:31,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888375878] [2020-10-05 23:15:31,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:31,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:31,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:31,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:31,732 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-05 23:15:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:32,346 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-05 23:15:32,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:15:32,347 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:32,347 INFO L225 Difference]: With dead ends: 102 [2020-10-05 23:15:32,347 INFO L226 Difference]: Without dead ends: 96 [2020-10-05 23:15:32,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:15:32,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-05 23:15:32,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-05 23:15:32,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:15:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-05 23:15:32,350 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-05 23:15:32,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:32,350 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-05 23:15:32,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:32,350 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-05 23:15:32,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:32,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:32,350 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:32,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-05 23:15:32,551 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:32,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:32,552 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-05 23:15:32,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:32,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820135482] [2020-10-05 23:15:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:32,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820135482] [2020-10-05 23:15:32,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563908327] [2020-10-05 23:15:32,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:33,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-05 23:15:33,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:33,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:33,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:33,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:33,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:33,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:33,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316902097] [2020-10-05 23:15:33,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:33,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:33,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:33,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:33,054 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-05 23:15:33,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:33,689 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-05 23:15:33,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:15:33,690 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:33,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:33,691 INFO L225 Difference]: With dead ends: 122 [2020-10-05 23:15:33,691 INFO L226 Difference]: Without dead ends: 116 [2020-10-05 23:15:33,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:15:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-05 23:15:33,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-05 23:15:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-05 23:15:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-05 23:15:33,693 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-05 23:15:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:33,694 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-05 23:15:33,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-05 23:15:33,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:33,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:33,694 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:33,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-05 23:15:33,895 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:33,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:33,895 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-05 23:15:33,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:33,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745561347] [2020-10-05 23:15:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:34,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745561347] [2020-10-05 23:15:34,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481563094] [2020-10-05 23:15:34,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:34,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:34,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:34,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:34,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:34,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009670546] [2020-10-05 23:15:34,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:34,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:34,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:34,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:34,339 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-05 23:15:35,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:35,076 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-05 23:15:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:15:35,077 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:35,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:35,078 INFO L225 Difference]: With dead ends: 123 [2020-10-05 23:15:35,078 INFO L226 Difference]: Without dead ends: 117 [2020-10-05 23:15:35,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:15:35,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-05 23:15:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-05 23:15:35,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:15:35,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-05 23:15:35,081 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-05 23:15:35,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:35,081 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-05 23:15:35,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:35,081 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-05 23:15:35,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:35,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:35,081 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:35,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-05 23:15:35,282 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:35,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:35,283 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-05 23:15:35,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:35,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078492366] [2020-10-05 23:15:35,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:35,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078492366] [2020-10-05 23:15:35,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845472821] [2020-10-05 23:15:35,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:35,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:15:35,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:35,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:35,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:35,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:35,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:35,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:35,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209213136] [2020-10-05 23:15:35,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:35,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:35,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:35,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:35,769 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-05 23:15:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:36,543 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-05 23:15:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:15:36,544 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:36,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:36,544 INFO L225 Difference]: With dead ends: 139 [2020-10-05 23:15:36,545 INFO L226 Difference]: Without dead ends: 133 [2020-10-05 23:15:36,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 23:15:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-05 23:15:36,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-05 23:15:36,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:15:36,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-05 23:15:36,548 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-05 23:15:36,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:36,548 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-05 23:15:36,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-05 23:15:36,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:36,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:36,549 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:36,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-05 23:15:36,757 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:36,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:36,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-05 23:15:36,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:36,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882783172] [2020-10-05 23:15:36,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:37,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882783172] [2020-10-05 23:15:37,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096952305] [2020-10-05 23:15:37,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:37,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-05 23:15:37,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:37,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:37,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:37,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:37,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:37,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941890153] [2020-10-05 23:15:37,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:37,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:37,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:37,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:37,192 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-05 23:15:37,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:37,994 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-05 23:15:37,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:15:37,994 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:37,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:37,995 INFO L225 Difference]: With dead ends: 139 [2020-10-05 23:15:37,995 INFO L226 Difference]: Without dead ends: 133 [2020-10-05 23:15:37,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:15:37,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-05 23:15:37,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-05 23:15:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-05 23:15:37,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-05 23:15:37,997 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-05 23:15:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:37,997 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-05 23:15:37,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:37,997 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-05 23:15:37,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:37,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:37,998 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:38,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:38,198 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:38,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-05 23:15:38,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:38,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411613210] [2020-10-05 23:15:38,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:38,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411613210] [2020-10-05 23:15:38,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654737344] [2020-10-05 23:15:38,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:38,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:15:38,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:38,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:38,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:38,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:38,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:38,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:38,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282115253] [2020-10-05 23:15:38,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:38,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:38,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:38,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:38,653 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-05 23:15:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:39,550 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-05 23:15:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:15:39,551 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:39,551 INFO L225 Difference]: With dead ends: 136 [2020-10-05 23:15:39,551 INFO L226 Difference]: Without dead ends: 130 [2020-10-05 23:15:39,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:15:39,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-05 23:15:39,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-05 23:15:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 23:15:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-05 23:15:39,553 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-05 23:15:39,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:39,554 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-05 23:15:39,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-05 23:15:39,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:39,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:39,554 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:39,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-05 23:15:39,755 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:39,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:39,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-05 23:15:39,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:39,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413384001] [2020-10-05 23:15:39,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:40,096 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:40,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413384001] [2020-10-05 23:15:40,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736695781] [2020-10-05 23:15:40,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:40,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-05 23:15:40,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:40,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:40,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:40,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:40,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:40,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141493394] [2020-10-05 23:15:40,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:40,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:40,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:40,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:40,171 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-05 23:15:41,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:41,037 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-05 23:15:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:15:41,037 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:41,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:41,038 INFO L225 Difference]: With dead ends: 137 [2020-10-05 23:15:41,038 INFO L226 Difference]: Without dead ends: 131 [2020-10-05 23:15:41,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 23:15:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-05 23:15:41,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-05 23:15:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-05 23:15:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-05 23:15:41,040 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-05 23:15:41,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:41,041 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-05 23:15:41,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-05 23:15:41,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:41,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:41,041 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:41,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:41,242 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:41,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:41,242 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-05 23:15:41,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:41,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561813648] [2020-10-05 23:15:41,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:41,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561813648] [2020-10-05 23:15:41,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548250379] [2020-10-05 23:15:41,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:41,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-05 23:15:41,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:41,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:41,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:41,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:41,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:41,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:41,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001593229] [2020-10-05 23:15:41,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:41,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:41,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:41,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:41,734 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-05 23:15:42,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:42,739 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-05 23:15:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:15:42,740 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:42,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:42,740 INFO L225 Difference]: With dead ends: 134 [2020-10-05 23:15:42,741 INFO L226 Difference]: Without dead ends: 128 [2020-10-05 23:15:42,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 23:15:42,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-05 23:15:42,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-05 23:15:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-05 23:15:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-05 23:15:42,746 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-05 23:15:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:42,746 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-05 23:15:42,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:42,746 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-05 23:15:42,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:42,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:42,747 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:42,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-05 23:15:42,949 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:42,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:42,949 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-05 23:15:42,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:42,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930764069] [2020-10-05 23:15:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:43,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930764069] [2020-10-05 23:15:43,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117182419] [2020-10-05 23:15:43,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:43,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:43,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:43,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:43,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:43,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520043825] [2020-10-05 23:15:43,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:43,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:43,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:43,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:43,350 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-05 23:15:44,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:44,286 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-05 23:15:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 23:15:44,287 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:44,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:44,287 INFO L225 Difference]: With dead ends: 135 [2020-10-05 23:15:44,287 INFO L226 Difference]: Without dead ends: 129 [2020-10-05 23:15:44,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-05 23:15:44,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-05 23:15:44,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-05 23:15:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:15:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-05 23:15:44,290 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-05 23:15:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:44,290 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-05 23:15:44,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-05 23:15:44,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:44,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:44,291 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:44,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:44,491 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:44,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:44,492 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-05 23:15:44,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:44,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955938610] [2020-10-05 23:15:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:44,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955938610] [2020-10-05 23:15:44,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565775371] [2020-10-05 23:15:44,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:44,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:15:44,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:44,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:44,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:44,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:44,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:44,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:44,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417774593] [2020-10-05 23:15:44,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:44,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:44,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:44,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:44,928 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-05 23:15:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:46,054 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-05 23:15:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 23:15:46,055 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:46,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:46,056 INFO L225 Difference]: With dead ends: 132 [2020-10-05 23:15:46,056 INFO L226 Difference]: Without dead ends: 126 [2020-10-05 23:15:46,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-05 23:15:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-05 23:15:46,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-05 23:15:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:15:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-05 23:15:46,058 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-05 23:15:46,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:46,058 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-05 23:15:46,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-05 23:15:46,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:46,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:46,059 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:46,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:46,259 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:46,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:46,260 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-05 23:15:46,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:46,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55803866] [2020-10-05 23:15:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:46,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55803866] [2020-10-05 23:15:46,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810671062] [2020-10-05 23:15:46,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:46,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-05 23:15:46,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:46,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:46,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:46,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:46,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:46,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647148899] [2020-10-05 23:15:46,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:46,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:46,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:46,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:46,658 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-05 23:15:47,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:47,684 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-05 23:15:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:15:47,685 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:47,685 INFO L225 Difference]: With dead ends: 133 [2020-10-05 23:15:47,685 INFO L226 Difference]: Without dead ends: 127 [2020-10-05 23:15:47,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 23:15:47,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-05 23:15:47,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-05 23:15:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-05 23:15:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-05 23:15:47,688 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-05 23:15:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:47,688 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-05 23:15:47,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-05 23:15:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:47,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:47,688 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:47,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:47,889 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:47,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:47,890 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-05 23:15:47,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:47,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927280768] [2020-10-05 23:15:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:48,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927280768] [2020-10-05 23:15:48,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637778346] [2020-10-05 23:15:48,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:48,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:15:48,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:48,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:48,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:48,284 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:48,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:48,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:48,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452720716] [2020-10-05 23:15:48,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:48,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:48,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:48,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:48,305 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-05 23:15:49,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:49,535 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-05 23:15:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 23:15:49,536 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:49,536 INFO L225 Difference]: With dead ends: 130 [2020-10-05 23:15:49,536 INFO L226 Difference]: Without dead ends: 124 [2020-10-05 23:15:49,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-05 23:15:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-05 23:15:49,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-05 23:15:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 23:15:49,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-05 23:15:49,538 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-05 23:15:49,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:49,538 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-05 23:15:49,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:49,538 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-05 23:15:49,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:49,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:49,539 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:49,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:49,739 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:49,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:49,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-05 23:15:49,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:49,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698888025] [2020-10-05 23:15:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:50,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698888025] [2020-10-05 23:15:50,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725552573] [2020-10-05 23:15:50,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:50,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-05 23:15:50,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:50,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:50,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:50,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:50,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:50,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755229287] [2020-10-05 23:15:50,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:50,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:50,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:50,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:50,133 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-05 23:15:51,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:51,221 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-05 23:15:51,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-05 23:15:51,222 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:51,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:51,223 INFO L225 Difference]: With dead ends: 131 [2020-10-05 23:15:51,223 INFO L226 Difference]: Without dead ends: 125 [2020-10-05 23:15:51,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-05 23:15:51,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-05 23:15:51,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-05 23:15:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-05 23:15:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-05 23:15:51,226 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-05 23:15:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:51,227 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-05 23:15:51,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-05 23:15:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:51,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:51,227 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:51,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-05 23:15:51,432 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:51,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-05 23:15:51,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:51,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830940472] [2020-10-05 23:15:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:51,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830940472] [2020-10-05 23:15:51,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938094250] [2020-10-05 23:15:51,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:51,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-05 23:15:51,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:51,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:51,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:51,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:51,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:51,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:51,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084154032] [2020-10-05 23:15:51,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:51,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:51,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:51,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:51,853 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-05 23:15:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:53,157 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-05 23:15:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-05 23:15:53,158 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:53,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:53,159 INFO L225 Difference]: With dead ends: 128 [2020-10-05 23:15:53,159 INFO L226 Difference]: Without dead ends: 122 [2020-10-05 23:15:53,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-05 23:15:53,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-05 23:15:53,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-05 23:15:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-05 23:15:53,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-05 23:15:53,162 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-05 23:15:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:53,162 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-05 23:15:53,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:53,162 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-05 23:15:53,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:53,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:53,163 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:53,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-05 23:15:53,363 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:53,364 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-05 23:15:53,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:53,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095381115] [2020-10-05 23:15:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:53,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095381115] [2020-10-05 23:15:53,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563720486] [2020-10-05 23:15:53,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:53,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:53,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:53,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:53,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:53,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666827019] [2020-10-05 23:15:53,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:53,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:53,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:53,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:53,746 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-05 23:15:54,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:54,916 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-05 23:15:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 23:15:54,917 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:54,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:54,917 INFO L225 Difference]: With dead ends: 129 [2020-10-05 23:15:54,917 INFO L226 Difference]: Without dead ends: 123 [2020-10-05 23:15:54,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-05 23:15:54,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-05 23:15:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-05 23:15:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:15:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:15:54,920 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-05 23:15:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:54,921 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:15:54,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:15:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:54,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:54,921 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:55,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-05 23:15:55,122 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:55,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-05 23:15:55,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:55,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911775611] [2020-10-05 23:15:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:55,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911775611] [2020-10-05 23:15:55,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668777640] [2020-10-05 23:15:55,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:55,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:15:55,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:55,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:55,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:55,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:55,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:55,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:55,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661660014] [2020-10-05 23:15:55,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:55,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:55,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:55,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:55,531 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-05 23:15:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:56,974 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-05 23:15:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-05 23:15:56,974 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:56,975 INFO L225 Difference]: With dead ends: 126 [2020-10-05 23:15:56,975 INFO L226 Difference]: Without dead ends: 120 [2020-10-05 23:15:56,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-05 23:15:56,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-05 23:15:56,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-05 23:15:56,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:56,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:56,978 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-05 23:15:56,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:56,978 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:56,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:56,978 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:56,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:56,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:56,978 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:57,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-05 23:15:57,179 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:57,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:57,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-05 23:15:57,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:57,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611527079] [2020-10-05 23:15:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:57,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611527079] [2020-10-05 23:15:57,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614313879] [2020-10-05 23:15:57,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:57,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-05 23:15:57,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:57,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:57,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:57,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:57,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:57,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217410965] [2020-10-05 23:15:57,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:57,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:57,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:57,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:57,592 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-05 23:15:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:58,842 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-05 23:15:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-05 23:15:58,843 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:58,843 INFO L225 Difference]: With dead ends: 127 [2020-10-05 23:15:58,843 INFO L226 Difference]: Without dead ends: 121 [2020-10-05 23:15:58,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-05 23:15:58,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-05 23:15:58,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-05 23:15:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-05 23:15:58,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-05 23:15:58,846 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-05 23:15:58,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:58,846 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-05 23:15:58,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:58,846 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-05 23:15:58,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:58,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:58,847 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:59,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:59,048 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:59,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:59,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-05 23:15:59,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:59,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775674505] [2020-10-05 23:15:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:59,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775674505] [2020-10-05 23:15:59,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574095890] [2020-10-05 23:15:59,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:59,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:15:59,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:59,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:59,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:59,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:59,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:59,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:59,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120698705] [2020-10-05 23:15:59,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:59,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:59,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:59,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:59,468 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-05 23:16:01,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:01,023 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-05 23:16:01,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-05 23:16:01,024 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:16:01,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:01,024 INFO L225 Difference]: With dead ends: 124 [2020-10-05 23:16:01,024 INFO L226 Difference]: Without dead ends: 118 [2020-10-05 23:16:01,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-05 23:16:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-05 23:16:01,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-05 23:16:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-05 23:16:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-05 23:16:01,028 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-05 23:16:01,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:01,028 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-05 23:16:01,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:16:01,028 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-05 23:16:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:16:01,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:01,029 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:01,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-05 23:16:01,236 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:01,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:01,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-05 23:16:01,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:01,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730035023] [2020-10-05 23:16:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:01,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730035023] [2020-10-05 23:16:01,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702570088] [2020-10-05 23:16:01,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:01,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-05 23:16:01,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:01,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:16:01,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:01,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:01,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:16:01,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814562289] [2020-10-05 23:16:01,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:16:01,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:01,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:16:01,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:16:01,634 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-05 23:16:02,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:02,958 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-05 23:16:02,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-05 23:16:02,959 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:16:02,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:02,960 INFO L225 Difference]: With dead ends: 144 [2020-10-05 23:16:02,960 INFO L226 Difference]: Without dead ends: 138 [2020-10-05 23:16:02,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-05 23:16:02,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-05 23:16:02,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-05 23:16:02,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-05 23:16:02,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-05 23:16:02,964 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-05 23:16:02,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:02,964 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-05 23:16:02,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:16:02,964 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-05 23:16:02,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:16:02,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:02,965 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:03,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:03,174 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:03,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:03,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-05 23:16:03,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:03,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146378614] [2020-10-05 23:16:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:03,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146378614] [2020-10-05 23:16:03,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215065733] [2020-10-05 23:16:03,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:03,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-05 23:16:03,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:03,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:16:03,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:03,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:16:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:03,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:03,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:16:03,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659335945] [2020-10-05 23:16:03,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:16:03,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:03,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:16:03,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:16:03,589 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-05 23:16:05,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:05,200 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-05 23:16:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-05 23:16:05,201 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:16:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:05,201 INFO L225 Difference]: With dead ends: 125 [2020-10-05 23:16:05,201 INFO L226 Difference]: Without dead ends: 117 [2020-10-05 23:16:05,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-05 23:16:05,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-05 23:16:05,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-05 23:16:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-05 23:16:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-05 23:16:05,204 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-05 23:16:05,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:05,204 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-05 23:16:05,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:16:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-05 23:16:05,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:05,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:05,204 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:05,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-05 23:16:05,405 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:05,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:05,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-05 23:16:05,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:05,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774407269] [2020-10-05 23:16:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:05,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774407269] [2020-10-05 23:16:05,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482250811] [2020-10-05 23:16:05,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:05,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:05,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:05,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:05,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-05 23:16:05,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728236244] [2020-10-05 23:16:05,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:16:05,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:05,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:16:05,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:16:05,923 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-05 23:16:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:06,664 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-10-05 23:16:06,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:16:06,665 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-05 23:16:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:06,666 INFO L225 Difference]: With dead ends: 144 [2020-10-05 23:16:06,666 INFO L226 Difference]: Without dead ends: 138 [2020-10-05 23:16:06,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:16:06,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-05 23:16:06,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-05 23:16:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-05 23:16:06,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-05 23:16:06,669 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-05 23:16:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:06,669 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-05 23:16:06,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:16:06,669 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-05 23:16:06,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:06,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:06,669 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:06,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:06,870 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-10-05 23:16:06,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:06,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925698336] [2020-10-05 23:16:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:07,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925698336] [2020-10-05 23:16:07,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857821795] [2020-10-05 23:16:07,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:07,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:16:07,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:07,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:07,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:07,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:16:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:07,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:07,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-05 23:16:07,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067829615] [2020-10-05 23:16:07,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-05 23:16:07,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:07,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-05 23:16:07,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:16:07,414 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-05 23:16:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:08,264 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-10-05 23:16:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:16:08,265 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-05 23:16:08,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:08,266 INFO L225 Difference]: With dead ends: 141 [2020-10-05 23:16:08,266 INFO L226 Difference]: Without dead ends: 135 [2020-10-05 23:16:08,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:16:08,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-05 23:16:08,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-10-05 23:16:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-05 23:16:08,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-05 23:16:08,269 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-05 23:16:08,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:08,269 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-05 23:16:08,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-05 23:16:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-05 23:16:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:08,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:08,270 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:08,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-10-05 23:16:08,471 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:08,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:08,471 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-10-05 23:16:08,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:08,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755724122] [2020-10-05 23:16:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:08,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755724122] [2020-10-05 23:16:08,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851709722] [2020-10-05 23:16:08,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:08,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-05 23:16:08,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:08,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:08,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:08,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:08,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-05 23:16:08,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756354576] [2020-10-05 23:16:08,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:16:08,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:08,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:16:08,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:16:08,961 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-05 23:16:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:09,778 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-10-05 23:16:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:16:09,779 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-05 23:16:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:09,779 INFO L225 Difference]: With dead ends: 138 [2020-10-05 23:16:09,779 INFO L226 Difference]: Without dead ends: 132 [2020-10-05 23:16:09,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 23:16:09,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-05 23:16:09,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-10-05 23:16:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-05 23:16:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-05 23:16:09,782 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-05 23:16:09,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:09,782 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-05 23:16:09,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:16:09,782 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-05 23:16:09,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:09,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:09,783 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:09,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:09,984 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:09,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:09,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-10-05 23:16:09,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:09,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561310317] [2020-10-05 23:16:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:10,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561310317] [2020-10-05 23:16:10,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092353517] [2020-10-05 23:16:10,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:10,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:16:10,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:10,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:10,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:10,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:16:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:10,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:10,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-05 23:16:10,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625882177] [2020-10-05 23:16:10,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-05 23:16:10,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:10,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-05 23:16:10,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:16:10,500 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-05 23:16:11,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:11,484 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-05 23:16:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:16:11,485 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-05 23:16:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:11,485 INFO L225 Difference]: With dead ends: 137 [2020-10-05 23:16:11,485 INFO L226 Difference]: Without dead ends: 131 [2020-10-05 23:16:11,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 23:16:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-05 23:16:11,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-05 23:16:11,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-05 23:16:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-05 23:16:11,488 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-05 23:16:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:11,489 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-05 23:16:11,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-05 23:16:11,489 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-05 23:16:11,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:11,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:11,489 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:11,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-10-05 23:16:11,690 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:11,691 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-10-05 23:16:11,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:11,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525865046] [2020-10-05 23:16:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:12,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525865046] [2020-10-05 23:16:12,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774840504] [2020-10-05 23:16:12,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:12,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-05 23:16:12,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:12,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:12,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:12,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:12,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-05 23:16:12,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293414629] [2020-10-05 23:16:12,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:16:12,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:12,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:16:12,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:16:12,169 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-05 23:16:13,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:13,076 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-05 23:16:13,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:16:13,077 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-05 23:16:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:13,077 INFO L225 Difference]: With dead ends: 134 [2020-10-05 23:16:13,077 INFO L226 Difference]: Without dead ends: 128 [2020-10-05 23:16:13,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:16:13,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-05 23:16:13,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-05 23:16:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-05 23:16:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-05 23:16:13,084 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-05 23:16:13,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:13,084 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-05 23:16:13,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:16:13,085 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-05 23:16:13,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:13,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:13,085 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:13,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-05 23:16:13,294 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:13,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:13,294 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-10-05 23:16:13,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:13,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057238313] [2020-10-05 23:16:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:13,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057238313] [2020-10-05 23:16:13,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60222544] [2020-10-05 23:16:13,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:13,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-05 23:16:13,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:13,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:13,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:13,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:16:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:13,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:13,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-05 23:16:13,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427318007] [2020-10-05 23:16:13,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-05 23:16:13,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:13,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-05 23:16:13,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:16:13,798 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-05 23:16:14,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:14,897 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-05 23:16:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:16:14,898 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-05 23:16:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:14,899 INFO L225 Difference]: With dead ends: 133 [2020-10-05 23:16:14,899 INFO L226 Difference]: Without dead ends: 127 [2020-10-05 23:16:14,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-10-05 23:16:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-05 23:16:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-05 23:16:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-05 23:16:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-05 23:16:14,902 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-05 23:16:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:14,902 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-05 23:16:14,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-05 23:16:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-05 23:16:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:14,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:14,903 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:15,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-05 23:16:15,103 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:15,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:15,104 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-10-05 23:16:15,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:15,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420700048] [2020-10-05 23:16:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:15,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420700048] [2020-10-05 23:16:15,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628581653] [2020-10-05 23:16:15,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:15,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:15,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:15,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:15,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-05 23:16:15,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64136533] [2020-10-05 23:16:15,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:16:15,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:15,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:16:15,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:16:15,562 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-05 23:16:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:16,549 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-10-05 23:16:16,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:16:16,550 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-05 23:16:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:16,551 INFO L225 Difference]: With dead ends: 130 [2020-10-05 23:16:16,551 INFO L226 Difference]: Without dead ends: 124 [2020-10-05 23:16:16,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 23:16:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-05 23:16:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-10-05 23:16:16,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-05 23:16:16,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-05 23:16:16,555 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-05 23:16:16,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:16,555 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-05 23:16:16,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:16:16,555 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-05 23:16:16,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:16,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:16,555 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:16,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:16,757 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:16,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:16,758 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-10-05 23:16:16,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:16,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099612252] [2020-10-05 23:16:16,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:17,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099612252] [2020-10-05 23:16:17,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489667750] [2020-10-05 23:16:17,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:17,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:16:17,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:17,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:17,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:17,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:16:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:17,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:17,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-05 23:16:17,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087346836] [2020-10-05 23:16:17,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-05 23:16:17,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:17,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-05 23:16:17,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:16:17,263 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-05 23:16:18,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:18,452 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-05 23:16:18,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 23:16:18,453 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-05 23:16:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:18,453 INFO L225 Difference]: With dead ends: 129 [2020-10-05 23:16:18,454 INFO L226 Difference]: Without dead ends: 123 [2020-10-05 23:16:18,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 23:16:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-05 23:16:18,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-05 23:16:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-05 23:16:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-05 23:16:18,457 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-05 23:16:18,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:18,457 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-05 23:16:18,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-05 23:16:18,457 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-05 23:16:18,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:18,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:18,458 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:18,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-05 23:16:18,658 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:18,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:18,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-10-05 23:16:18,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:18,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132406178] [2020-10-05 23:16:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:19,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132406178] [2020-10-05 23:16:19,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099605871] [2020-10-05 23:16:19,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:19,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-05 23:16:19,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:19,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:19,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:19,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:19,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-05 23:16:19,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658260196] [2020-10-05 23:16:19,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:16:19,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:19,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:16:19,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:16:19,117 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-05 23:16:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:20,196 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-10-05 23:16:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 23:16:20,197 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-05 23:16:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:20,198 INFO L225 Difference]: With dead ends: 126 [2020-10-05 23:16:20,198 INFO L226 Difference]: Without dead ends: 120 [2020-10-05 23:16:20,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-10-05 23:16:20,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-05 23:16:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-10-05 23:16:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-05 23:16:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-05 23:16:20,201 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-05 23:16:20,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:20,201 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-05 23:16:20,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:16:20,201 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-05 23:16:20,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:20,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:20,201 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:20,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:20,402 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:20,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:20,403 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-10-05 23:16:20,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:20,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842821602] [2020-10-05 23:16:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:20,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842821602] [2020-10-05 23:16:20,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841035079] [2020-10-05 23:16:20,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:20,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:16:20,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:20,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:20,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:20,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:16:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:20,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:20,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-05 23:16:20,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267200847] [2020-10-05 23:16:20,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-05 23:16:20,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:20,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-05 23:16:20,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:16:20,887 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-05 23:16:22,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:22,214 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-10-05 23:16:22,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 23:16:22,215 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-05 23:16:22,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:22,216 INFO L225 Difference]: With dead ends: 125 [2020-10-05 23:16:22,216 INFO L226 Difference]: Without dead ends: 119 [2020-10-05 23:16:22,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-10-05 23:16:22,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-05 23:16:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-05 23:16:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-05 23:16:22,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-05 23:16:22,219 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-05 23:16:22,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:22,219 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-05 23:16:22,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-05 23:16:22,219 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-05 23:16:22,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:22,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:22,220 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:22,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-10-05 23:16:22,423 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:22,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:22,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-10-05 23:16:22,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:22,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995019846] [2020-10-05 23:16:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:22,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995019846] [2020-10-05 23:16:22,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005547973] [2020-10-05 23:16:22,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:22,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-05 23:16:22,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:22,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:22,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:22,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:22,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-05 23:16:22,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271152597] [2020-10-05 23:16:22,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:16:22,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:22,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:16:22,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:16:22,857 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-05 23:16:24,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:24,017 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-10-05 23:16:24,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:16:24,019 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-05 23:16:24,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:24,019 INFO L225 Difference]: With dead ends: 122 [2020-10-05 23:16:24,019 INFO L226 Difference]: Without dead ends: 116 [2020-10-05 23:16:24,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-10-05 23:16:24,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-05 23:16:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-05 23:16:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-05 23:16:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-05 23:16:24,024 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-05 23:16:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:24,024 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-05 23:16:24,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:16:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-05 23:16:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:24,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:24,025 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:24,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:24,231 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:24,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:24,231 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-10-05 23:16:24,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:24,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348482846] [2020-10-05 23:16:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:24,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348482846] [2020-10-05 23:16:24,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692283984] [2020-10-05 23:16:24,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:24,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-05 23:16:24,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:24,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:24,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:24,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:16:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:24,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:24,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-05 23:16:24,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214310830] [2020-10-05 23:16:24,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-05 23:16:24,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:24,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-05 23:16:24,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:16:24,717 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-05 23:16:26,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:26,171 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-10-05 23:16:26,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-05 23:16:26,172 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-05 23:16:26,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:26,173 INFO L225 Difference]: With dead ends: 121 [2020-10-05 23:16:26,173 INFO L226 Difference]: Without dead ends: 115 [2020-10-05 23:16:26,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-10-05 23:16:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-05 23:16:26,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-05 23:16:26,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-05 23:16:26,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-05 23:16:26,176 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-05 23:16:26,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:26,176 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-05 23:16:26,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-05 23:16:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-05 23:16:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:26,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:26,177 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:26,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-10-05 23:16:26,381 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-10-05 23:16:26,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:26,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770685029] [2020-10-05 23:16:26,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:26,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770685029] [2020-10-05 23:16:26,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019428610] [2020-10-05 23:16:26,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:26,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:26,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:26,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:26,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-05 23:16:26,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930115634] [2020-10-05 23:16:26,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:16:26,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:26,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:16:26,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:16:26,820 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-05 23:16:28,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:28,099 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-10-05 23:16:28,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-05 23:16:28,101 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-05 23:16:28,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:28,101 INFO L225 Difference]: With dead ends: 118 [2020-10-05 23:16:28,102 INFO L226 Difference]: Without dead ends: 112 [2020-10-05 23:16:28,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-10-05 23:16:28,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-05 23:16:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-05 23:16:28,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-05 23:16:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-05 23:16:28,104 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-05 23:16:28,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:28,105 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-05 23:16:28,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:16:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-05 23:16:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:28,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:28,105 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:28,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:28,306 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:28,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:28,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-10-05 23:16:28,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:28,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139978138] [2020-10-05 23:16:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:28,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139978138] [2020-10-05 23:16:28,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465441113] [2020-10-05 23:16:28,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:28,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:16:28,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:28,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:28,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:28,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:16:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:28,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:28,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-05 23:16:28,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048820821] [2020-10-05 23:16:28,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-05 23:16:28,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:28,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-05 23:16:28,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:16:28,767 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-05 23:16:30,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:30,341 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-10-05 23:16:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-05 23:16:30,343 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-05 23:16:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:30,343 INFO L225 Difference]: With dead ends: 117 [2020-10-05 23:16:30,343 INFO L226 Difference]: Without dead ends: 111 [2020-10-05 23:16:30,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-10-05 23:16:30,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-05 23:16:30,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-05 23:16:30,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-05 23:16:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-05 23:16:30,346 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-05 23:16:30,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:30,347 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-05 23:16:30,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-05 23:16:30,347 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-05 23:16:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:30,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:30,347 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:30,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:30,548 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:30,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:30,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-10-05 23:16:30,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:30,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731947450] [2020-10-05 23:16:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:30,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731947450] [2020-10-05 23:16:30,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111560805] [2020-10-05 23:16:30,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:30,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-05 23:16:30,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:30,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:30,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:30,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:30,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-05 23:16:30,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468383496] [2020-10-05 23:16:30,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:16:30,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:30,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:16:30,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:16:30,980 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-05 23:16:32,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:32,328 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-05 23:16:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 23:16:32,329 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-05 23:16:32,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:32,330 INFO L225 Difference]: With dead ends: 114 [2020-10-05 23:16:32,330 INFO L226 Difference]: Without dead ends: 108 [2020-10-05 23:16:32,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-05 23:16:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-05 23:16:32,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-05 23:16:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-05 23:16:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-05 23:16:32,333 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-05 23:16:32,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:32,333 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-05 23:16:32,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:16:32,333 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-05 23:16:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:32,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:32,333 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:32,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-05 23:16:32,534 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:32,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:32,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-10-05 23:16:32,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:32,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882785493] [2020-10-05 23:16:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:32,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882785493] [2020-10-05 23:16:32,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935826526] [2020-10-05 23:16:32,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:32,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:16:32,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:32,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-05 23:16:32,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:32,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:16:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:33,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:33,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-05 23:16:33,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993108248] [2020-10-05 23:16:33,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-05 23:16:33,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:33,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-05 23:16:33,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:16:33,010 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. Received shutdown request... [2020-10-05 23:16:33,227 WARN L210 SmtUtils]: Removed 3 from assertion stack [2020-10-05 23:16:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 23:16:33,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-05 23:16:33,429 WARN L544 AbstractCegarLoop]: Verification canceled [2020-10-05 23:16:33,435 WARN L228 ceAbstractionStarter]: Timeout [2020-10-05 23:16:33,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 11:16:33 BasicIcfg [2020-10-05 23:16:33,435 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-05 23:16:33,438 INFO L168 Benchmark]: Toolchain (without parser) took 265534.08 ms. Allocated memory was 140.0 MB in the beginning and 198.7 MB in the end (delta: 58.7 MB). Free memory was 100.6 MB in the beginning and 147.1 MB in the end (delta: -46.5 MB). Peak memory consumption was 92.0 MB. Max. memory is 7.1 GB. [2020-10-05 23:16:33,438 INFO L168 Benchmark]: CDTParser took 0.63 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-05 23:16:33,439 INFO L168 Benchmark]: CACSL2BoogieTranslator took 710.63 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 100.2 MB in the beginning and 164.5 MB in the end (delta: -64.3 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-10-05 23:16:33,439 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.26 ms. Allocated memory is still 205.0 MB. Free memory was 164.5 MB in the beginning and 162.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-05 23:16:33,440 INFO L168 Benchmark]: Boogie Preprocessor took 29.49 ms. Allocated memory is still 205.0 MB. Free memory was 162.5 MB in the beginning and 161.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-05 23:16:33,441 INFO L168 Benchmark]: RCFGBuilder took 406.26 ms. Allocated memory is still 205.0 MB. Free memory was 161.2 MB in the beginning and 140.6 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-10-05 23:16:33,442 INFO L168 Benchmark]: TraceAbstraction took 264330.90 ms. Allocated memory was 205.0 MB in the beginning and 198.7 MB in the end (delta: -6.3 MB). Free memory was 140.0 MB in the beginning and 147.1 MB in the end (delta: -7.1 MB). Peak memory consumption was 66.3 MB. Max. memory is 7.1 GB. [2020-10-05 23:16:33,444 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.63 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 710.63 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 100.2 MB in the beginning and 164.5 MB in the end (delta: -64.3 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 50.26 ms. Allocated memory is still 205.0 MB. Free memory was 164.5 MB in the beginning and 162.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.49 ms. Allocated memory is still 205.0 MB. Free memory was 162.5 MB in the beginning and 161.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 406.26 ms. Allocated memory is still 205.0 MB. Free memory was 161.2 MB in the beginning and 140.6 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 264330.90 ms. Allocated memory was 205.0 MB in the beginning and 198.7 MB in the end (delta: -6.3 MB). Free memory was 140.0 MB in the beginning and 147.1 MB in the end (delta: -7.1 MB). Peak memory consumption was 66.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.2s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was constructing difference of abstraction (93states) and FLOYD_HOARE automaton (currently 8 states, 25 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 8ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 264.1s, OverallIterations: 234, TraceHistogramMax: 10, AutomataDifference: 149.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3737 SDtfs, 13136 SDslu, 25136 SDs, 0 SdLazy, 26974 SolverSat, 15153 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13092 GetRequests, 4322 SyntacticMatches, 229 SemanticMatches, 8540 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85054 ImplicationChecksByTransitivity, 154.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 233 MinimizatonAttempts, 5954 StatesRemovedByMinimization, 232 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 5.3s SatisfiabilityAnalysisTime, 50.6s InterpolantComputationTime, 9850 NumberOfCodeBlocks, 9850 NumberOfCodeBlocksAsserted, 1218 NumberOfCheckSat, 9387 ConstructedInterpolants, 0 QuantifiedInterpolants, 920851 SizeOfPredicates, 3071 NumberOfNonLiveVariables, 30011 ConjunctsInSsa, 3992 ConjunctsInUnsatCore, 463 InterpolantComputations, 5 PerfectInterpolantSequences, 0/20130 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