/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 22:34:09,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 22:34:09,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 22:34:09,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 22:34:09,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 22:34:09,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 22:34:09,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 22:34:09,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 22:34:09,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 22:34:09,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 22:34:09,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 22:34:09,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 22:34:09,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 22:34:09,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 22:34:09,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 22:34:09,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 22:34:09,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 22:34:09,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 22:34:09,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 22:34:09,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 22:34:09,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 22:34:09,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 22:34:09,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 22:34:09,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 22:34:09,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-21 22:34:09,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-21 22:34:09,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-21 22:34:09,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-21 22:34:09,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-21 22:34:09,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-21 22:34:09,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-21 22:34:09,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-21 22:34:09,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-21 22:34:09,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-21 22:34:09,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-21 22:34:09,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-21 22:34:09,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-21 22:34:09,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-21 22:34:09,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 22:34:09,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 22:34:09,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 22:34:09,688 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 [2020-10-21 22:34:09,712 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 22:34:09,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 22:34:09,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 22:34:09,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 22:34:09,713 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 22:34:09,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 22:34:09,714 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 22:34:09,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 22:34:09,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 22:34:09,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 22:34:09,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 22:34:09,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 22:34:09,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 22:34:09,715 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 22:34:09,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 22:34:09,716 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 22:34:09,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 22:34:09,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 22:34:09,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 22:34:09,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 22:34:09,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 22:34:09,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 22:34:09,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 22:34:09,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-21 22:34:09,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 22:34:09,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 22:34:09,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 22:34:09,718 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-21 22:34:09,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 22:34:10,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 22:34:10,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 22:34:10,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 22:34:10,020 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 22:34:10,020 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 22:34:10,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-10-21 22:34:10,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f9cd21d1/b234a35f1892408ea9ee306154e94cfb/FLAG5d2019c6b [2020-10-21 22:34:10,544 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 22:34:10,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-10-21 22:34:10,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f9cd21d1/b234a35f1892408ea9ee306154e94cfb/FLAG5d2019c6b [2020-10-21 22:34:10,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f9cd21d1/b234a35f1892408ea9ee306154e94cfb [2020-10-21 22:34:10,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 22:34:10,849 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 22:34:10,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 22:34:10,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 22:34:10,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 22:34:10,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 10:34:10" (1/1) ... [2020-10-21 22:34:10,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f658355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:10, skipping insertion in model container [2020-10-21 22:34:10,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 10:34:10" (1/1) ... [2020-10-21 22:34:10,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 22:34:10,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 22:34:11,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 22:34:11,400 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 22:34:11,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 22:34:11,511 INFO L208 MainTranslator]: Completed translation [2020-10-21 22:34:11,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11 WrapperNode [2020-10-21 22:34:11,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 22:34:11,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 22:34:11,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 22:34:11,513 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 22:34:11,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 22:34:11,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 22:34:11,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 22:34:11,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 22:34:11,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 22:34:11,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 22:34:11,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 22:34:11,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 22:34:11,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (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 [2020-10-21 22:34:11,659 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-21 22:34:11,659 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-21 22:34:11,659 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-21 22:34:11,659 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-21 22:34:11,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 22:34:11,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-21 22:34:11,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 22:34:11,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 22:34:11,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-21 22:34:11,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-21 22:34:11,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 22:34:11,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 22:34:11,663 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-21 22:34:12,176 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 22:34:12,176 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-21 22:34:12,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 10:34:12 BoogieIcfgContainer [2020-10-21 22:34:12,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 22:34:12,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 22:34:12,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 22:34:12,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 22:34:12,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 10:34:10" (1/3) ... [2020-10-21 22:34:12,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21118c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 10:34:12, skipping insertion in model container [2020-10-21 22:34:12,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (2/3) ... [2020-10-21 22:34:12,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21118c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 10:34:12, skipping insertion in model container [2020-10-21 22:34:12,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 10:34:12" (3/3) ... [2020-10-21 22:34:12,190 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2020-10-21 22:34:12,202 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 22:34:12,202 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-21 22:34:12,209 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 22:34:12,209 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 22:34:12,234 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,234 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,235 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,235 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,235 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,236 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,236 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,237 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,237 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,237 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,238 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,238 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,238 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,238 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,239 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,239 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,240 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,240 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,240 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,240 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,241 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,241 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,241 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,242 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,242 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,243 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,243 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,243 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,243 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,243 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,247 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,248 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,248 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,248 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,248 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,249 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,254 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,254 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,254 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,255 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,255 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,255 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,257 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-21 22:34:12,272 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-21 22:34:12,294 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 22:34:12,294 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 22:34:12,294 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-21 22:34:12,295 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-21 22:34:12,295 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 22:34:12,295 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 22:34:12,295 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 22:34:12,295 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 22:34:12,309 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-21 22:34:12,310 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 142 flow [2020-10-21 22:34:12,312 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 142 flow [2020-10-21 22:34:12,315 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 142 flow [2020-10-21 22:34:12,357 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-10-21 22:34:12,357 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-21 22:34:12,364 INFO L80 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2020-10-21 22:34:12,366 INFO L116 LiptonReduction]: Number of co-enabled transitions 1272 [2020-10-21 22:34:13,504 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-21 22:34:13,924 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-21 22:34:14,068 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-21 22:34:14,109 INFO L131 LiptonReduction]: Checked pairs total: 1183 [2020-10-21 22:34:14,109 INFO L133 LiptonReduction]: Total number of compositions: 65 [2020-10-21 22:34:14,116 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-21 22:34:14,128 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-21 22:34:14,130 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-21 22:34:14,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-21 22:34:14,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:14,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-21 22:34:14,138 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:14,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:14,142 INFO L82 PathProgramCache]: Analyzing trace with hash -542844556, now seen corresponding path program 1 times [2020-10-21 22:34:14,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:14,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600796148] [2020-10-21 22:34:14,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:14,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600796148] [2020-10-21 22:34:14,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:34:14,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-21 22:34:14,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392601739] [2020-10-21 22:34:14,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-21 22:34:14,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:14,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-21 22:34:14,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 22:34:14,458 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-21 22:34:14,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:14,537 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-21 22:34:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 22:34:14,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-21 22:34:14,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:14,560 INFO L225 Difference]: With dead ends: 83 [2020-10-21 22:34:14,560 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 22:34:14,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-21 22:34:14,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 22:34:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-21 22:34:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-21 22:34:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-21 22:34:14,603 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-21 22:34:14,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:14,603 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-21 22:34:14,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-21 22:34:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-21 22:34:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 22:34:14,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:14,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:14,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 22:34:14,605 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:14,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:14,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1940739433, now seen corresponding path program 1 times [2020-10-21 22:34:14,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:14,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976831966] [2020-10-21 22:34:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:14,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976831966] [2020-10-21 22:34:14,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:34:14,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 22:34:14,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877034994] [2020-10-21 22:34:14,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 22:34:14,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:14,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 22:34:14,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-21 22:34:14,691 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-21 22:34:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:14,756 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-21 22:34:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 22:34:14,756 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 22:34:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:14,758 INFO L225 Difference]: With dead ends: 80 [2020-10-21 22:34:14,758 INFO L226 Difference]: Without dead ends: 75 [2020-10-21 22:34:14,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-21 22:34:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-21 22:34:14,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-21 22:34:14,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-21 22:34:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-21 22:34:14,770 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-21 22:34:14,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:14,771 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-21 22:34:14,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 22:34:14,771 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-21 22:34:14,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 22:34:14,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:14,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:14,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-21 22:34:14,773 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:14,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1981941347, now seen corresponding path program 1 times [2020-10-21 22:34:14,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:14,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951281457] [2020-10-21 22:34:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:14,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951281457] [2020-10-21 22:34:14,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:34:14,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 22:34:14,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815622265] [2020-10-21 22:34:14,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 22:34:14,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:14,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 22:34:14,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-21 22:34:14,855 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-21 22:34:14,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:14,926 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-10-21 22:34:14,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 22:34:14,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 22:34:14,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:14,928 INFO L225 Difference]: With dead ends: 83 [2020-10-21 22:34:14,929 INFO L226 Difference]: Without dead ends: 77 [2020-10-21 22:34:14,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-21 22:34:14,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-21 22:34:14,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-10-21 22:34:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-21 22:34:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-21 22:34:14,939 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-21 22:34:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:14,939 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-21 22:34:14,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 22:34:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-21 22:34:14,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-21 22:34:14,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:14,941 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:14,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-21 22:34:14,941 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:14,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:14,942 INFO L82 PathProgramCache]: Analyzing trace with hash -33351122, now seen corresponding path program 2 times [2020-10-21 22:34:14,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:14,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431424270] [2020-10-21 22:34:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:15,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431424270] [2020-10-21 22:34:15,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760174770] [2020-10-21 22:34:15,024 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 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 [2020-10-21 22:34:15,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:15,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:15,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 22:34:15,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:15,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:15,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:15,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-21 22:34:15,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783030701] [2020-10-21 22:34:15,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 22:34:15,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:15,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 22:34:15,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-21 22:34:15,214 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-21 22:34:15,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:15,302 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-21 22:34:15,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 22:34:15,303 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-21 22:34:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:15,304 INFO L225 Difference]: With dead ends: 101 [2020-10-21 22:34:15,304 INFO L226 Difference]: Without dead ends: 96 [2020-10-21 22:34:15,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:15,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-21 22:34:15,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-21 22:34:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-21 22:34:15,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-21 22:34:15,314 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-21 22:34:15,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:15,315 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-21 22:34:15,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 22:34:15,315 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-21 22:34:15,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-21 22:34:15,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:15,316 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:15,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:15,528 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:15,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1310611417, now seen corresponding path program 2 times [2020-10-21 22:34:15,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:15,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703135521] [2020-10-21 22:34:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:15,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703135521] [2020-10-21 22:34:15,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146690148] [2020-10-21 22:34:15,593 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 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 [2020-10-21 22:34:15,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:15,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:15,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 22:34:15,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:15,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:15,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:15,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-21 22:34:15,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682611416] [2020-10-21 22:34:15,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 22:34:15,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:15,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 22:34:15,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:34:15,739 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-21 22:34:15,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:15,846 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-21 22:34:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 22:34:15,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-21 22:34:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:15,848 INFO L225 Difference]: With dead ends: 96 [2020-10-21 22:34:15,848 INFO L226 Difference]: Without dead ends: 90 [2020-10-21 22:34:15,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-21 22:34:15,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-21 22:34:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-10-21 22:34:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 22:34:15,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-21 22:34:15,860 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-21 22:34:15,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:15,860 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-21 22:34:15,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 22:34:15,861 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-21 22:34:15,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:34:15,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:15,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:16,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:16,076 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1043120626, now seen corresponding path program 1 times [2020-10-21 22:34:16,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:16,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895098716] [2020-10-21 22:34:16,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:16,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895098716] [2020-10-21 22:34:16,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:34:16,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 22:34:16,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937972095] [2020-10-21 22:34:16,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 22:34:16,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:16,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 22:34:16,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-21 22:34:16,174 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-21 22:34:16,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:16,250 INFO L93 Difference]: Finished difference Result 103 states and 242 transitions. [2020-10-21 22:34:16,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 22:34:16,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 22:34:16,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:16,251 INFO L225 Difference]: With dead ends: 103 [2020-10-21 22:34:16,252 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 22:34:16,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:34:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 22:34:16,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-10-21 22:34:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-21 22:34:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-10-21 22:34:16,268 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 10 [2020-10-21 22:34:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:16,268 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-10-21 22:34:16,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 22:34:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-10-21 22:34:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:34:16,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:16,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:16,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-21 22:34:16,270 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:16,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:16,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1043091796, now seen corresponding path program 2 times [2020-10-21 22:34:16,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:16,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047813627] [2020-10-21 22:34:16,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:16,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047813627] [2020-10-21 22:34:16,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:34:16,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 22:34:16,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361306942] [2020-10-21 22:34:16,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 22:34:16,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:16,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 22:34:16,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-21 22:34:16,383 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 6 states. [2020-10-21 22:34:16,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:16,459 INFO L93 Difference]: Finished difference Result 103 states and 242 transitions. [2020-10-21 22:34:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 22:34:16,460 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 22:34:16,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:16,461 INFO L225 Difference]: With dead ends: 103 [2020-10-21 22:34:16,461 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 22:34:16,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:34:16,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 22:34:16,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-10-21 22:34:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-21 22:34:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-21 22:34:16,477 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-21 22:34:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:16,480 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-21 22:34:16,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 22:34:16,480 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-21 22:34:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:34:16,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:16,481 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:16,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-21 22:34:16,481 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:16,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:16,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1033855625, now seen corresponding path program 3 times [2020-10-21 22:34:16,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:16,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391844063] [2020-10-21 22:34:16,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:16,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391844063] [2020-10-21 22:34:16,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818108848] [2020-10-21 22:34:16,626 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 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 [2020-10-21 22:34:16,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:34:16,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:16,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:16,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:16,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:16,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:16,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-21 22:34:16,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968044780] [2020-10-21 22:34:16,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 22:34:16,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:16,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 22:34:16,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-21 22:34:16,774 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-21 22:34:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:16,866 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-21 22:34:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:16,867 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-21 22:34:16,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:16,868 INFO L225 Difference]: With dead ends: 122 [2020-10-21 22:34:16,869 INFO L226 Difference]: Without dead ends: 117 [2020-10-21 22:34:16,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-21 22:34:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-21 22:34:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-21 22:34:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-21 22:34:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-21 22:34:16,876 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-21 22:34:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:16,877 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-21 22:34:16,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 22:34:16,877 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-21 22:34:16,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:34:16,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:16,878 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:17,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:17,093 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:17,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:17,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1974220067, now seen corresponding path program 3 times [2020-10-21 22:34:17,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:17,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280445372] [2020-10-21 22:34:17,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:17,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280445372] [2020-10-21 22:34:17,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528121184] [2020-10-21 22:34:17,157 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 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 [2020-10-21 22:34:17,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:34:17,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:17,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:17,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:17,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:17,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:17,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:17,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786770967] [2020-10-21 22:34:17,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:17,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:17,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:17,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:17,303 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-21 22:34:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:17,433 INFO L93 Difference]: Finished difference Result 121 states and 288 transitions. [2020-10-21 22:34:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:17,434 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-21 22:34:17,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:17,435 INFO L225 Difference]: With dead ends: 121 [2020-10-21 22:34:17,435 INFO L226 Difference]: Without dead ends: 115 [2020-10-21 22:34:17,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:34:17,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-21 22:34:17,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2020-10-21 22:34:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 22:34:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-21 22:34:17,450 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-21 22:34:17,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:17,450 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-21 22:34:17,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:17,454 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-21 22:34:17,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:17,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:17,455 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:17,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:17,658 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:17,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:17,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2022998328, now seen corresponding path program 3 times [2020-10-21 22:34:17,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:17,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539908606] [2020-10-21 22:34:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:17,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539908606] [2020-10-21 22:34:17,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723453583] [2020-10-21 22:34:17,724 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 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 [2020-10-21 22:34:17,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:34:17,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:17,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:17,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:17,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:17,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:17,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:17,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832156155] [2020-10-21 22:34:17,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:17,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:17,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:17,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:17,868 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-21 22:34:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:18,057 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-10-21 22:34:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:18,058 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:18,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:18,060 INFO L225 Difference]: With dead ends: 121 [2020-10-21 22:34:18,060 INFO L226 Difference]: Without dead ends: 116 [2020-10-21 22:34:18,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:34:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-21 22:34:18,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2020-10-21 22:34:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 22:34:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-21 22:34:18,067 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 11 [2020-10-21 22:34:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:18,067 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-21 22:34:18,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:18,068 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-21 22:34:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:18,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:18,069 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:18,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-21 22:34:18,283 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:18,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2023027158, now seen corresponding path program 4 times [2020-10-21 22:34:18,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:18,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846855280] [2020-10-21 22:34:18,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:18,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846855280] [2020-10-21 22:34:18,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008842268] [2020-10-21 22:34:18,380 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 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 [2020-10-21 22:34:18,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:34:18,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:18,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:18,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:18,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:18,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:18,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:18,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111747331] [2020-10-21 22:34:18,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:18,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:18,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:18,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:18,504 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-21 22:34:18,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:18,735 INFO L93 Difference]: Finished difference Result 131 states and 313 transitions. [2020-10-21 22:34:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:34:18,736 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:18,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:18,737 INFO L225 Difference]: With dead ends: 131 [2020-10-21 22:34:18,737 INFO L226 Difference]: Without dead ends: 126 [2020-10-21 22:34:18,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-21 22:34:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-21 22:34:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 95. [2020-10-21 22:34:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 22:34:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 237 transitions. [2020-10-21 22:34:18,743 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 237 transitions. Word has length 11 [2020-10-21 22:34:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:18,743 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 237 transitions. [2020-10-21 22:34:18,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:18,743 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 237 transitions. [2020-10-21 22:34:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:18,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:18,744 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:18,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:18,945 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:18,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2023028119, now seen corresponding path program 5 times [2020-10-21 22:34:18,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:18,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240146884] [2020-10-21 22:34:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:19,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240146884] [2020-10-21 22:34:19,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610537837] [2020-10-21 22:34:19,004 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 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 [2020-10-21 22:34:19,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:19,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:19,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:19,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:19,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:19,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:19,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:19,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832778930] [2020-10-21 22:34:19,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:19,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:19,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:19,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:19,150 INFO L87 Difference]: Start difference. First operand 95 states and 237 transitions. Second operand 11 states. [2020-10-21 22:34:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:19,304 INFO L93 Difference]: Finished difference Result 126 states and 297 transitions. [2020-10-21 22:34:19,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:19,305 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:19,306 INFO L225 Difference]: With dead ends: 126 [2020-10-21 22:34:19,306 INFO L226 Difference]: Without dead ends: 121 [2020-10-21 22:34:19,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:34:19,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-21 22:34:19,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2020-10-21 22:34:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 22:34:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-10-21 22:34:19,321 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 11 [2020-10-21 22:34:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:19,321 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-10-21 22:34:19,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-10-21 22:34:19,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:19,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:19,322 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:19,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:19,536 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:19,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:19,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920888, now seen corresponding path program 6 times [2020-10-21 22:34:19,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:19,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471416369] [2020-10-21 22:34:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:19,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471416369] [2020-10-21 22:34:19,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819757902] [2020-10-21 22:34:19,602 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 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 [2020-10-21 22:34:19,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 22:34:19,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:19,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:19,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:19,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:19,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:19,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:19,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321761807] [2020-10-21 22:34:19,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:19,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:19,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:19,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:19,717 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 11 states. [2020-10-21 22:34:19,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:19,902 INFO L93 Difference]: Finished difference Result 127 states and 304 transitions. [2020-10-21 22:34:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:19,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:19,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:19,904 INFO L225 Difference]: With dead ends: 127 [2020-10-21 22:34:19,904 INFO L226 Difference]: Without dead ends: 122 [2020-10-21 22:34:19,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:34:19,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-21 22:34:19,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2020-10-21 22:34:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-21 22:34:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 241 transitions. [2020-10-21 22:34:19,909 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 241 transitions. Word has length 11 [2020-10-21 22:34:19,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:19,909 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 241 transitions. [2020-10-21 22:34:19,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 241 transitions. [2020-10-21 22:34:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:19,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:19,910 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:20,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-21 22:34:20,122 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:20,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:20,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2023921849, now seen corresponding path program 7 times [2020-10-21 22:34:20,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:20,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509650326] [2020-10-21 22:34:20,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:20,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509650326] [2020-10-21 22:34:20,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537559235] [2020-10-21 22:34:20,180 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 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 [2020-10-21 22:34:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:20,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:20,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:20,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:20,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:20,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:20,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957997549] [2020-10-21 22:34:20,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:20,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:20,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:20,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:20,302 INFO L87 Difference]: Start difference. First operand 97 states and 241 transitions. Second operand 11 states. [2020-10-21 22:34:20,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:20,523 INFO L93 Difference]: Finished difference Result 141 states and 331 transitions. [2020-10-21 22:34:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:34:20,523 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:20,525 INFO L225 Difference]: With dead ends: 141 [2020-10-21 22:34:20,526 INFO L226 Difference]: Without dead ends: 136 [2020-10-21 22:34:20,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-21 22:34:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-21 22:34:20,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2020-10-21 22:34:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-21 22:34:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 236 transitions. [2020-10-21 22:34:20,531 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 236 transitions. Word has length 11 [2020-10-21 22:34:20,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:20,532 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 236 transitions. [2020-10-21 22:34:20,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:20,532 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 236 transitions. [2020-10-21 22:34:20,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:20,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:20,532 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:20,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:20,738 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:20,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:20,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2023950679, now seen corresponding path program 8 times [2020-10-21 22:34:20,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:20,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779974849] [2020-10-21 22:34:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:20,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779974849] [2020-10-21 22:34:20,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410841049] [2020-10-21 22:34:20,809 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 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 [2020-10-21 22:34:20,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:20,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:20,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:34:20,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:20,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:20,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-21 22:34:20,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904849009] [2020-10-21 22:34:20,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 22:34:20,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:20,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 22:34:20,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:34:20,900 INFO L87 Difference]: Start difference. First operand 96 states and 236 transitions. Second operand 9 states. [2020-10-21 22:34:21,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:21,044 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-21 22:34:21,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:21,044 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-10-21 22:34:21,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:21,046 INFO L225 Difference]: With dead ends: 131 [2020-10-21 22:34:21,046 INFO L226 Difference]: Without dead ends: 126 [2020-10-21 22:34:21,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:21,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-21 22:34:21,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2020-10-21 22:34:21,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-21 22:34:21,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-21 22:34:21,051 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-21 22:34:21,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:21,051 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-21 22:34:21,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 22:34:21,051 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-21 22:34:21,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:21,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:21,052 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:21,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-21 22:34:21,253 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:21,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:21,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1984724146, now seen corresponding path program 4 times [2020-10-21 22:34:21,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:21,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760956978] [2020-10-21 22:34:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:21,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760956978] [2020-10-21 22:34:21,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179866678] [2020-10-21 22:34:21,347 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 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 [2020-10-21 22:34:21,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:34:21,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:21,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:21,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:21,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:21,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:21,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-21 22:34:21,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353221514] [2020-10-21 22:34:21,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 22:34:21,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:21,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 22:34:21,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-21 22:34:21,505 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-21 22:34:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:21,624 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-21 22:34:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:34:21,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-21 22:34:21,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:21,626 INFO L225 Difference]: With dead ends: 143 [2020-10-21 22:34:21,626 INFO L226 Difference]: Without dead ends: 138 [2020-10-21 22:34:21,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-21 22:34:21,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-21 22:34:21,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-21 22:34:21,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-21 22:34:21,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-21 22:34:21,633 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-21 22:34:21,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:21,634 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-21 22:34:21,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 22:34:21,634 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-21 22:34:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:21,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:21,635 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:21,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-21 22:34:21,848 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:21,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:21,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1071251737, now seen corresponding path program 4 times [2020-10-21 22:34:21,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:21,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220381943] [2020-10-21 22:34:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:21,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220381943] [2020-10-21 22:34:21,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323825376] [2020-10-21 22:34:21,936 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 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 [2020-10-21 22:34:21,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:34:21,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:21,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:21,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:22,071 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:22,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:22,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:22,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169711435] [2020-10-21 22:34:22,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:22,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:22,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:22,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:22,084 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-21 22:34:22,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:22,233 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-10-21 22:34:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:34:22,234 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-21 22:34:22,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:22,235 INFO L225 Difference]: With dead ends: 147 [2020-10-21 22:34:22,235 INFO L226 Difference]: Without dead ends: 141 [2020-10-21 22:34:22,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-21 22:34:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-21 22:34:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2020-10-21 22:34:22,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-21 22:34:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-21 22:34:22,242 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-21 22:34:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:22,242 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-21 22:34:22,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-21 22:34:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:22,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:22,243 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:22,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-21 22:34:22,455 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:22,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:22,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1711561906, now seen corresponding path program 9 times [2020-10-21 22:34:22,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:22,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98071459] [2020-10-21 22:34:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:22,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98071459] [2020-10-21 22:34:22,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545123791] [2020-10-21 22:34:22,541 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 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 [2020-10-21 22:34:22,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:34:22,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:22,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:22,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:22,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:22,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:22,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:22,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556758197] [2020-10-21 22:34:22,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:22,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:22,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:22,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:22,684 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-21 22:34:22,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:22,928 INFO L93 Difference]: Finished difference Result 152 states and 363 transitions. [2020-10-21 22:34:22,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:34:22,928 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:22,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:22,929 INFO L225 Difference]: With dead ends: 152 [2020-10-21 22:34:22,930 INFO L226 Difference]: Without dead ends: 147 [2020-10-21 22:34:22,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:34:22,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-21 22:34:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2020-10-21 22:34:22,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 22:34:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 277 transitions. [2020-10-21 22:34:22,935 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 277 transitions. Word has length 12 [2020-10-21 22:34:22,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:22,935 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 277 transitions. [2020-10-21 22:34:22,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:22,935 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 277 transitions. [2020-10-21 22:34:22,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:22,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:22,936 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:23,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-21 22:34:23,146 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:23,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:23,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1711533076, now seen corresponding path program 10 times [2020-10-21 22:34:23,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:23,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453826681] [2020-10-21 22:34:23,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:23,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453826681] [2020-10-21 22:34:23,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815049344] [2020-10-21 22:34:23,217 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 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 [2020-10-21 22:34:23,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:34:23,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:23,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:23,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:23,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:24,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:24,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-21 22:34:24,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81762330] [2020-10-21 22:34:24,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 22:34:24,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:24,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 22:34:24,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=125, Unknown=1, NotChecked=0, Total=182 [2020-10-21 22:34:24,838 INFO L87 Difference]: Start difference. First operand 112 states and 277 transitions. Second operand 14 states. [2020-10-21 22:34:40,727 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-21 22:34:50,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:50,544 INFO L93 Difference]: Finished difference Result 168 states and 398 transitions. [2020-10-21 22:34:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-21 22:34:50,545 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-10-21 22:34:50,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:50,547 INFO L225 Difference]: With dead ends: 168 [2020-10-21 22:34:50,547 INFO L226 Difference]: Without dead ends: 163 [2020-10-21 22:34:50,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=195, Invalid=403, Unknown=2, NotChecked=0, Total=600 [2020-10-21 22:34:50,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-21 22:34:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 112. [2020-10-21 22:34:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 22:34:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 279 transitions. [2020-10-21 22:34:50,552 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 279 transitions. Word has length 12 [2020-10-21 22:34:50,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:50,552 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 279 transitions. [2020-10-21 22:34:50,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 22:34:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 279 transitions. [2020-10-21 22:34:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:50,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:50,553 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:50,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:50,754 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:50,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:50,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1711532115, now seen corresponding path program 11 times [2020-10-21 22:34:50,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:50,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468268367] [2020-10-21 22:34:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:50,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468268367] [2020-10-21 22:34:50,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794080141] [2020-10-21 22:34:50,834 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 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 [2020-10-21 22:34:50,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:50,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:50,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:50,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:50,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:50,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:50,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:50,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616601955] [2020-10-21 22:34:50,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:50,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:50,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:50,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:50,987 INFO L87 Difference]: Start difference. First operand 112 states and 279 transitions. Second operand 13 states. [2020-10-21 22:34:51,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:51,242 INFO L93 Difference]: Finished difference Result 148 states and 355 transitions. [2020-10-21 22:34:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:34:51,243 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:51,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:51,244 INFO L225 Difference]: With dead ends: 148 [2020-10-21 22:34:51,245 INFO L226 Difference]: Without dead ends: 143 [2020-10-21 22:34:51,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:34:51,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-21 22:34:51,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2020-10-21 22:34:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-21 22:34:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 274 transitions. [2020-10-21 22:34:51,250 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 274 transitions. Word has length 12 [2020-10-21 22:34:51,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:51,250 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 274 transitions. [2020-10-21 22:34:51,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:51,250 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 274 transitions. [2020-10-21 22:34:51,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:51,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:51,253 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:51,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:51,461 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:51,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:51,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1710639346, now seen corresponding path program 12 times [2020-10-21 22:34:51,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:51,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080485301] [2020-10-21 22:34:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:51,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080485301] [2020-10-21 22:34:51,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527659059] [2020-10-21 22:34:51,554 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 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 [2020-10-21 22:34:51,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 22:34:51,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:51,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:51,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:51,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:51,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:51,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:51,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123612774] [2020-10-21 22:34:51,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:51,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:51,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:51,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:51,716 INFO L87 Difference]: Start difference. First operand 111 states and 274 transitions. Second operand 13 states. [2020-10-21 22:34:52,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:52,099 INFO L93 Difference]: Finished difference Result 167 states and 399 transitions. [2020-10-21 22:34:52,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:34:52,099 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:52,101 INFO L225 Difference]: With dead ends: 167 [2020-10-21 22:34:52,101 INFO L226 Difference]: Without dead ends: 162 [2020-10-21 22:34:52,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-21 22:34:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-21 22:34:52,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2020-10-21 22:34:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 22:34:52,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 287 transitions. [2020-10-21 22:34:52,108 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 287 transitions. Word has length 12 [2020-10-21 22:34:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:52,110 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 287 transitions. [2020-10-21 22:34:52,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:52,110 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 287 transitions. [2020-10-21 22:34:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:52,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:52,111 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:52,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:52,325 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:52,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:52,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1710638385, now seen corresponding path program 13 times [2020-10-21 22:34:52,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:52,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30680192] [2020-10-21 22:34:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:52,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30680192] [2020-10-21 22:34:52,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051198638] [2020-10-21 22:34:52,422 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 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 [2020-10-21 22:34:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:52,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:52,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:52,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:52,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:52,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:52,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207284254] [2020-10-21 22:34:52,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:52,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:52,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:52,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:52,554 INFO L87 Difference]: Start difference. First operand 114 states and 287 transitions. Second operand 13 states. [2020-10-21 22:34:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:52,902 INFO L93 Difference]: Finished difference Result 177 states and 423 transitions. [2020-10-21 22:34:52,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 22:34:52,902 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:52,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:52,903 INFO L225 Difference]: With dead ends: 177 [2020-10-21 22:34:52,904 INFO L226 Difference]: Without dead ends: 169 [2020-10-21 22:34:52,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-21 22:34:52,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-21 22:34:52,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2020-10-21 22:34:52,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 22:34:52,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 283 transitions. [2020-10-21 22:34:52,909 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 283 transitions. Word has length 12 [2020-10-21 22:34:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:52,909 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 283 transitions. [2020-10-21 22:34:52,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 283 transitions. [2020-10-21 22:34:52,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:52,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:52,910 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:53,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-21 22:34:53,121 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:53,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1710609555, now seen corresponding path program 14 times [2020-10-21 22:34:53,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:53,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738645083] [2020-10-21 22:34:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:53,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738645083] [2020-10-21 22:34:53,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868737444] [2020-10-21 22:34:53,188 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 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 [2020-10-21 22:34:53,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:53,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:53,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:53,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:53,316 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:53,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:53,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:53,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739607762] [2020-10-21 22:34:53,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:53,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:53,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:53,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:53,355 INFO L87 Difference]: Start difference. First operand 114 states and 283 transitions. Second operand 13 states. [2020-10-21 22:34:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:53,715 INFO L93 Difference]: Finished difference Result 165 states and 395 transitions. [2020-10-21 22:34:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:34:53,715 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:53,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:53,717 INFO L225 Difference]: With dead ends: 165 [2020-10-21 22:34:53,717 INFO L226 Difference]: Without dead ends: 160 [2020-10-21 22:34:53,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:34:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-21 22:34:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2020-10-21 22:34:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 22:34:53,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-21 22:34:53,722 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 12 [2020-10-21 22:34:53,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:53,722 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-21 22:34:53,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:53,722 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-21 22:34:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:53,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:53,723 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:53,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-21 22:34:53,924 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:53,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:53,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1682933716, now seen corresponding path program 15 times [2020-10-21 22:34:53,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:53,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345074314] [2020-10-21 22:34:53,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:54,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345074314] [2020-10-21 22:34:54,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802234798] [2020-10-21 22:34:54,003 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 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 [2020-10-21 22:34:54,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:34:54,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:54,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:54,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:54,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:54,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:54,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:54,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674044295] [2020-10-21 22:34:54,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:54,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:54,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:54,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:54,223 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-21 22:34:54,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:54,467 INFO L93 Difference]: Finished difference Result 158 states and 378 transitions. [2020-10-21 22:34:54,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:34:54,468 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:54,469 INFO L225 Difference]: With dead ends: 158 [2020-10-21 22:34:54,469 INFO L226 Difference]: Without dead ends: 153 [2020-10-21 22:34:54,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:34:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-21 22:34:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2020-10-21 22:34:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-21 22:34:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 291 transitions. [2020-10-21 22:34:54,474 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 291 transitions. Word has length 12 [2020-10-21 22:34:54,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:54,474 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 291 transitions. [2020-10-21 22:34:54,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:54,474 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 291 transitions. [2020-10-21 22:34:54,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:54,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:54,475 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:54,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-21 22:34:54,685 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:54,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:54,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1682932755, now seen corresponding path program 16 times [2020-10-21 22:34:54,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:54,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567504664] [2020-10-21 22:34:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:54,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567504664] [2020-10-21 22:34:54,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79667580] [2020-10-21 22:34:54,756 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 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 [2020-10-21 22:34:54,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:34:54,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:54,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:54,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:54,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:54,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:54,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:54,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295305670] [2020-10-21 22:34:54,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:54,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:54,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:54,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:54,945 INFO L87 Difference]: Start difference. First operand 116 states and 291 transitions. Second operand 13 states. [2020-10-21 22:34:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:55,398 INFO L93 Difference]: Finished difference Result 185 states and 436 transitions. [2020-10-21 22:34:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:34:55,399 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:55,400 INFO L225 Difference]: With dead ends: 185 [2020-10-21 22:34:55,401 INFO L226 Difference]: Without dead ends: 177 [2020-10-21 22:34:55,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:34:55,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-21 22:34:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 115. [2020-10-21 22:34:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-21 22:34:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 286 transitions. [2020-10-21 22:34:55,406 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 286 transitions. Word has length 12 [2020-10-21 22:34:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:55,406 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 286 transitions. [2020-10-21 22:34:55,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 286 transitions. [2020-10-21 22:34:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:55,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:55,407 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:55,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-21 22:34:55,618 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:55,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:55,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1682903925, now seen corresponding path program 17 times [2020-10-21 22:34:55,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:55,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226184691] [2020-10-21 22:34:55,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:55,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226184691] [2020-10-21 22:34:55,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468229849] [2020-10-21 22:34:55,683 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 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 [2020-10-21 22:34:55,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:55,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:55,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:55,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:55,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:55,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:55,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:55,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017580033] [2020-10-21 22:34:55,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:55,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:55,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:55,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:55,826 INFO L87 Difference]: Start difference. First operand 115 states and 286 transitions. Second operand 13 states. [2020-10-21 22:34:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:56,239 INFO L93 Difference]: Finished difference Result 194 states and 459 transitions. [2020-10-21 22:34:56,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 22:34:56,240 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:56,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:56,242 INFO L225 Difference]: With dead ends: 194 [2020-10-21 22:34:56,243 INFO L226 Difference]: Without dead ends: 186 [2020-10-21 22:34:56,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-21 22:34:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-21 22:34:56,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 117. [2020-10-21 22:34:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-21 22:34:56,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 283 transitions. [2020-10-21 22:34:56,249 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 283 transitions. Word has length 12 [2020-10-21 22:34:56,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:56,250 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 283 transitions. [2020-10-21 22:34:56,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:56,250 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 283 transitions. [2020-10-21 22:34:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:56,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:56,251 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:56,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-21 22:34:56,465 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:56,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1682902964, now seen corresponding path program 18 times [2020-10-21 22:34:56,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:56,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23332486] [2020-10-21 22:34:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:56,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23332486] [2020-10-21 22:34:56,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25713251] [2020-10-21 22:34:56,543 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 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 [2020-10-21 22:34:56,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 22:34:56,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:56,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:56,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:56,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:56,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:56,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:56,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319074706] [2020-10-21 22:34:56,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:56,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:56,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:56,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:56,696 INFO L87 Difference]: Start difference. First operand 117 states and 283 transitions. Second operand 13 states. [2020-10-21 22:34:57,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:57,005 INFO L93 Difference]: Finished difference Result 172 states and 404 transitions. [2020-10-21 22:34:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:34:57,006 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:57,008 INFO L225 Difference]: With dead ends: 172 [2020-10-21 22:34:57,008 INFO L226 Difference]: Without dead ends: 167 [2020-10-21 22:34:57,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-21 22:34:57,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-21 22:34:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2020-10-21 22:34:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 22:34:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-21 22:34:57,013 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-21 22:34:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:57,013 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-21 22:34:57,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:57,013 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-21 22:34:57,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:57,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:57,014 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:57,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:57,226 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:57,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:57,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1396877225, now seen corresponding path program 5 times [2020-10-21 22:34:57,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:57,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065471527] [2020-10-21 22:34:57,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:57,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065471527] [2020-10-21 22:34:57,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378143260] [2020-10-21 22:34:57,303 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 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 [2020-10-21 22:34:57,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 22:34:57,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:57,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:34:57,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:57,454 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:57,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:57,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 22:34:57,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859206799] [2020-10-21 22:34:57,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:34:57,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:57,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:34:57,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-21 22:34:57,481 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-21 22:34:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:57,632 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-21 22:34:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:34:57,633 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-21 22:34:57,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:57,635 INFO L225 Difference]: With dead ends: 164 [2020-10-21 22:34:57,635 INFO L226 Difference]: Without dead ends: 159 [2020-10-21 22:34:57,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-21 22:34:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-21 22:34:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-21 22:34:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-21 22:34:57,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-21 22:34:57,640 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-21 22:34:57,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:57,640 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-21 22:34:57,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:34:57,640 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-21 22:34:57,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:57,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:57,641 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:57,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-21 22:34:57,853 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:57,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1150962717, now seen corresponding path program 5 times [2020-10-21 22:34:57,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:57,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868466195] [2020-10-21 22:34:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:57,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868466195] [2020-10-21 22:34:57,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918041763] [2020-10-21 22:34:57,931 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 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 [2020-10-21 22:34:57,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 22:34:57,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:57,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:34:57,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:58,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:58,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:58,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:34:58,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461226348] [2020-10-21 22:34:58,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:34:58,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:58,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:34:58,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:34:58,112 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-21 22:34:58,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:58,305 INFO L93 Difference]: Finished difference Result 173 states and 412 transitions. [2020-10-21 22:34:58,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:34:58,305 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-21 22:34:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:58,307 INFO L225 Difference]: With dead ends: 173 [2020-10-21 22:34:58,307 INFO L226 Difference]: Without dead ends: 167 [2020-10-21 22:34:58,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:34:58,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-21 22:34:58,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2020-10-21 22:34:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 22:34:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 22:34:58,312 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-21 22:34:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:58,313 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 22:34:58,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:34:58,313 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 22:34:58,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:34:58,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:58,314 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:58,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-21 22:34:58,525 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:58,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:58,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1518812168, now seen corresponding path program 19 times [2020-10-21 22:34:58,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:58,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075185100] [2020-10-21 22:34:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:58,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075185100] [2020-10-21 22:34:58,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804644603] [2020-10-21 22:34:58,618 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 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 [2020-10-21 22:34:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:58,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:34:58,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:58,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:58,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:58,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:34:58,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987305497] [2020-10-21 22:34:58,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:34:58,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:58,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:34:58,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:34:58,803 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-21 22:34:59,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:59,123 INFO L93 Difference]: Finished difference Result 183 states and 437 transitions. [2020-10-21 22:34:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:34:59,124 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:34:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:59,125 INFO L225 Difference]: With dead ends: 183 [2020-10-21 22:34:59,125 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 22:34:59,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:34:59,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 22:34:59,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2020-10-21 22:34:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 22:34:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-10-21 22:34:59,131 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-10-21 22:34:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:59,131 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-10-21 22:34:59,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:34:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-10-21 22:34:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:34:59,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:59,132 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:59,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:59,342 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:59,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1518783338, now seen corresponding path program 20 times [2020-10-21 22:34:59,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:59,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693962335] [2020-10-21 22:34:59,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:59,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693962335] [2020-10-21 22:34:59,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767521311] [2020-10-21 22:34:59,420 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 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 [2020-10-21 22:34:59,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:59,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:59,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:34:59,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:59,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:35:03,750 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 20 [2020-10-21 22:35:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:03,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:35:03,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 22:35:03,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161908168] [2020-10-21 22:35:03,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:35:03,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:35:03,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:35:03,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=166, Unknown=1, NotChecked=0, Total=240 [2020-10-21 22:35:03,753 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand 16 states. [2020-10-21 22:35:06,043 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2020-10-21 22:35:12,921 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2020-10-21 22:35:25,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:35:25,522 INFO L93 Difference]: Finished difference Result 204 states and 484 transitions. [2020-10-21 22:35:25,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 22:35:25,555 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 22:35:25,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:35:25,556 INFO L225 Difference]: With dead ends: 204 [2020-10-21 22:35:25,556 INFO L226 Difference]: Without dead ends: 199 [2020-10-21 22:35:25,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=259, Invalid=550, Unknown=3, NotChecked=0, Total=812 [2020-10-21 22:35:25,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-21 22:35:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 131. [2020-10-21 22:35:25,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 22:35:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 329 transitions. [2020-10-21 22:35:25,561 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 329 transitions. Word has length 13 [2020-10-21 22:35:25,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:35:25,562 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 329 transitions. [2020-10-21 22:35:25,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:35:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 329 transitions. [2020-10-21 22:35:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:35:25,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:35:25,563 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:35:25,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:25,773 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:35:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:35:25,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1518782377, now seen corresponding path program 21 times [2020-10-21 22:35:25,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:35:25,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935268308] [2020-10-21 22:35:25,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:35:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:35:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:25,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935268308] [2020-10-21 22:35:25,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448919580] [2020-10-21 22:35:25,862 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 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 [2020-10-21 22:35:25,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:35:25,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:35:25,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:35:25,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:35:26,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:35:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:26,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:35:26,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:35:26,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905950657] [2020-10-21 22:35:26,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:35:26,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:35:26,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:35:26,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:35:26,037 INFO L87 Difference]: Start difference. First operand 131 states and 329 transitions. Second operand 15 states. [2020-10-21 22:35:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:35:26,377 INFO L93 Difference]: Finished difference Result 184 states and 441 transitions. [2020-10-21 22:35:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:35:26,378 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:35:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:35:26,380 INFO L225 Difference]: With dead ends: 184 [2020-10-21 22:35:26,380 INFO L226 Difference]: Without dead ends: 179 [2020-10-21 22:35:26,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:35:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-21 22:35:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2020-10-21 22:35:26,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-21 22:35:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 319 transitions. [2020-10-21 22:35:26,385 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 319 transitions. Word has length 13 [2020-10-21 22:35:26,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:35:26,386 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 319 transitions. [2020-10-21 22:35:26,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:35:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 319 transitions. [2020-10-21 22:35:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:35:26,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:35:26,387 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:35:26,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-21 22:35:26,588 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:35:26,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:35:26,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1517889608, now seen corresponding path program 22 times [2020-10-21 22:35:26,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:35:26,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699191079] [2020-10-21 22:35:26,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:35:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:35:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:26,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699191079] [2020-10-21 22:35:26,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084643543] [2020-10-21 22:35:26,681 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 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 [2020-10-21 22:35:26,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:35:26,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:35:26,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:35:26,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:35:26,887 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:35:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:26,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:35:26,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:35:26,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888944883] [2020-10-21 22:35:26,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:35:26,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:35:26,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:35:26,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:35:26,918 INFO L87 Difference]: Start difference. First operand 129 states and 319 transitions. Second operand 15 states. [2020-10-21 22:35:27,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:35:27,467 INFO L93 Difference]: Finished difference Result 207 states and 492 transitions. [2020-10-21 22:35:27,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 22:35:27,467 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:35:27,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:35:27,469 INFO L225 Difference]: With dead ends: 207 [2020-10-21 22:35:27,469 INFO L226 Difference]: Without dead ends: 202 [2020-10-21 22:35:27,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-21 22:35:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-21 22:35:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 132. [2020-10-21 22:35:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 22:35:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 22:35:27,476 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 22:35:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:35:27,477 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 22:35:27,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:35:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 22:35:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:35:27,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:35:27,478 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:35:27,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:27,689 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:35:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:35:27,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1517888647, now seen corresponding path program 23 times [2020-10-21 22:35:27,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:35:27,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109956331] [2020-10-21 22:35:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:35:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:35:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:27,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109956331] [2020-10-21 22:35:27,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84403267] [2020-10-21 22:35:27,771 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 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 [2020-10-21 22:35:27,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:35:27,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:35:27,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:35:27,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:35:32,052 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-21 22:35:32,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:35:38,230 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 43 DAG size of output: 20 [2020-10-21 22:35:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:38,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:35:38,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 22:35:38,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385229594] [2020-10-21 22:35:38,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:35:38,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:35:38,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:35:38,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=168, Unknown=2, NotChecked=0, Total=240 [2020-10-21 22:35:38,233 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 16 states. [2020-10-21 22:35:42,346 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-21 22:35:44,447 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2020-10-21 22:35:48,636 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-21 22:35:50,925 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-21 22:36:07,412 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-10-21 22:36:09,538 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-21 22:36:40,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:36:40,225 INFO L93 Difference]: Finished difference Result 229 states and 545 transitions. [2020-10-21 22:36:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 22:36:40,257 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 22:36:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:36:40,258 INFO L225 Difference]: With dead ends: 229 [2020-10-21 22:36:40,258 INFO L226 Difference]: Without dead ends: 219 [2020-10-21 22:36:40,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=317, Invalid=732, Unknown=7, NotChecked=0, Total=1056 [2020-10-21 22:36:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-21 22:36:40,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 131. [2020-10-21 22:36:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 22:36:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-10-21 22:36:40,263 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-10-21 22:36:40,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:36:40,263 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-10-21 22:36:40,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:36:40,264 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-10-21 22:36:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:36:40,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:36:40,264 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:36:40,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-21 22:36:40,475 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:36:40,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:36:40,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1517859817, now seen corresponding path program 24 times [2020-10-21 22:36:40,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:36:40,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820664039] [2020-10-21 22:36:40,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:36:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:36:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:40,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820664039] [2020-10-21 22:36:40,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80277680] [2020-10-21 22:36:40,577 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 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 [2020-10-21 22:36:40,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 22:36:40,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:36:40,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:36:40,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:36:40,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:36:40,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:36:46,992 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 65 DAG size of output: 32 [2020-10-21 22:36:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:46,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:36:46,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 22:36:46,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852406790] [2020-10-21 22:36:46,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:36:46,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:36:46,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:36:46,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=169, Unknown=1, NotChecked=0, Total=240 [2020-10-21 22:36:46,996 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand 16 states. [2020-10-21 22:36:55,474 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-21 22:36:57,657 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 49 [2020-10-21 22:37:09,872 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-21 22:37:42,242 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-10-21 22:37:58,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:37:58,318 INFO L93 Difference]: Finished difference Result 230 states and 543 transitions. [2020-10-21 22:37:58,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 22:37:58,325 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 22:37:58,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:37:58,326 INFO L225 Difference]: With dead ends: 230 [2020-10-21 22:37:58,326 INFO L226 Difference]: Without dead ends: 221 [2020-10-21 22:37:58,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=313, Invalid=734, Unknown=9, NotChecked=0, Total=1056 [2020-10-21 22:37:58,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-21 22:37:58,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 128. [2020-10-21 22:37:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-21 22:37:58,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 316 transitions. [2020-10-21 22:37:58,331 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 316 transitions. Word has length 13 [2020-10-21 22:37:58,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:37:58,332 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 316 transitions. [2020-10-21 22:37:58,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:37:58,332 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 316 transitions. [2020-10-21 22:37:58,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:37:58,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:37:58,332 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:37:58,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:37:58,544 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:37:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:37:58,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1490183978, now seen corresponding path program 25 times [2020-10-21 22:37:58,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:37:58,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407551887] [2020-10-21 22:37:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:37:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:37:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:37:58,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407551887] [2020-10-21 22:37:58,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037189112] [2020-10-21 22:37:58,632 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 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 [2020-10-21 22:37:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:37:58,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:37:58,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:37:58,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:37:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:37:58,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:37:58,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:37:58,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837246769] [2020-10-21 22:37:58,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:37:58,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:37:58,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:37:58,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:37:58,810 INFO L87 Difference]: Start difference. First operand 128 states and 316 transitions. Second operand 15 states. [2020-10-21 22:37:59,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:37:59,431 INFO L93 Difference]: Finished difference Result 203 states and 485 transitions. [2020-10-21 22:37:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 22:37:59,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:37:59,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:37:59,434 INFO L225 Difference]: With dead ends: 203 [2020-10-21 22:37:59,434 INFO L226 Difference]: Without dead ends: 198 [2020-10-21 22:37:59,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-21 22:37:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-21 22:37:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 133. [2020-10-21 22:37:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-21 22:37:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 337 transitions. [2020-10-21 22:37:59,438 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 337 transitions. Word has length 13 [2020-10-21 22:37:59,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:37:59,438 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 337 transitions. [2020-10-21 22:37:59,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:37:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 337 transitions. [2020-10-21 22:37:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:37:59,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:37:59,439 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:37:59,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-21 22:37:59,640 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:37:59,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:37:59,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1490183017, now seen corresponding path program 26 times [2020-10-21 22:37:59,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:37:59,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854339606] [2020-10-21 22:37:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:37:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:37:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:37:59,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854339606] [2020-10-21 22:37:59,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606091826] [2020-10-21 22:37:59,735 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 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 [2020-10-21 22:37:59,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:37:59,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:37:59,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:37:59,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:37:59,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:37:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:37:59,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:37:59,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:37:59,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521866699] [2020-10-21 22:37:59,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:37:59,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:37:59,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:37:59,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:37:59,931 INFO L87 Difference]: Start difference. First operand 133 states and 337 transitions. Second operand 15 states. [2020-10-21 22:38:00,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:00,782 INFO L93 Difference]: Finished difference Result 204 states and 494 transitions. [2020-10-21 22:38:00,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 22:38:00,783 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:38:00,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:00,785 INFO L225 Difference]: With dead ends: 204 [2020-10-21 22:38:00,785 INFO L226 Difference]: Without dead ends: 199 [2020-10-21 22:38:00,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 22:38:00,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-21 22:38:00,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 132. [2020-10-21 22:38:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 22:38:00,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 22:38:00,792 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 22:38:00,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:00,793 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 22:38:00,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:00,793 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 22:38:00,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:00,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:00,794 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:00,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-21 22:38:00,995 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:00,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1490154187, now seen corresponding path program 27 times [2020-10-21 22:38:00,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:00,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375197895] [2020-10-21 22:38:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:01,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375197895] [2020-10-21 22:38:01,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053596950] [2020-10-21 22:38:01,119 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 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 [2020-10-21 22:38:01,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 22:38:01,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:01,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:01,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:01,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:38:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:01,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:01,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:38:01,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612023402] [2020-10-21 22:38:01,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:38:01,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:01,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:38:01,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:38:01,319 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-21 22:38:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:01,999 INFO L93 Difference]: Finished difference Result 221 states and 533 transitions. [2020-10-21 22:38:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:38:02,000 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:38:02,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:02,001 INFO L225 Difference]: With dead ends: 221 [2020-10-21 22:38:02,001 INFO L226 Difference]: Without dead ends: 213 [2020-10-21 22:38:02,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 22:38:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-21 22:38:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 132. [2020-10-21 22:38:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 22:38:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 336 transitions. [2020-10-21 22:38:02,006 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 336 transitions. Word has length 13 [2020-10-21 22:38:02,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:02,007 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 336 transitions. [2020-10-21 22:38:02,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:02,007 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 336 transitions. [2020-10-21 22:38:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:02,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:02,008 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:02,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-21 22:38:02,219 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:02,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:02,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1490153226, now seen corresponding path program 28 times [2020-10-21 22:38:02,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:02,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017361599] [2020-10-21 22:38:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:02,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017361599] [2020-10-21 22:38:02,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085334141] [2020-10-21 22:38:02,306 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 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 [2020-10-21 22:38:02,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:38:02,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:02,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:02,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:02,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:02,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:02,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:38:02,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957132305] [2020-10-21 22:38:02,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:38:02,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:02,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:38:02,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:38:02,501 INFO L87 Difference]: Start difference. First operand 132 states and 336 transitions. Second operand 15 states. [2020-10-21 22:38:03,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:03,115 INFO L93 Difference]: Finished difference Result 211 states and 510 transitions. [2020-10-21 22:38:03,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:38:03,116 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:38:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:03,118 INFO L225 Difference]: With dead ends: 211 [2020-10-21 22:38:03,118 INFO L226 Difference]: Without dead ends: 203 [2020-10-21 22:38:03,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 22:38:03,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-21 22:38:03,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 132. [2020-10-21 22:38:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 22:38:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 22:38:03,123 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 22:38:03,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:03,124 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 22:38:03,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:03,124 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 22:38:03,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:03,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:03,125 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:03,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-21 22:38:03,336 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:03,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:03,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1489259496, now seen corresponding path program 29 times [2020-10-21 22:38:03,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:03,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270550203] [2020-10-21 22:38:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:03,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270550203] [2020-10-21 22:38:03,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45416137] [2020-10-21 22:38:03,426 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 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 [2020-10-21 22:38:03,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 22:38:03,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:03,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:03,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:03,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:03,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:03,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:38:03,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969507158] [2020-10-21 22:38:03,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:38:03,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:03,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:38:03,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:38:03,754 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-21 22:38:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:04,699 INFO L93 Difference]: Finished difference Result 210 states and 502 transitions. [2020-10-21 22:38:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:38:04,700 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:38:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:04,702 INFO L225 Difference]: With dead ends: 210 [2020-10-21 22:38:04,702 INFO L226 Difference]: Without dead ends: 205 [2020-10-21 22:38:04,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 22:38:04,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-21 22:38:04,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 129. [2020-10-21 22:38:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-21 22:38:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 317 transitions. [2020-10-21 22:38:04,706 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 317 transitions. Word has length 13 [2020-10-21 22:38:04,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:04,706 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 317 transitions. [2020-10-21 22:38:04,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 317 transitions. [2020-10-21 22:38:04,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:04,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:04,707 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:04,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-21 22:38:04,914 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:04,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:04,915 INFO L82 PathProgramCache]: Analyzing trace with hash -631309448, now seen corresponding path program 30 times [2020-10-21 22:38:04,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:04,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051184645] [2020-10-21 22:38:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:05,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051184645] [2020-10-21 22:38:05,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134269911] [2020-10-21 22:38:05,003 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 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 [2020-10-21 22:38:05,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 22:38:05,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:05,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:05,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:05,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:38:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:05,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:05,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:38:05,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302922438] [2020-10-21 22:38:05,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:38:05,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:05,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:38:05,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:38:05,195 INFO L87 Difference]: Start difference. First operand 129 states and 317 transitions. Second operand 15 states. [2020-10-21 22:38:05,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:05,565 INFO L93 Difference]: Finished difference Result 189 states and 452 transitions. [2020-10-21 22:38:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:38:05,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:38:05,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:05,566 INFO L225 Difference]: With dead ends: 189 [2020-10-21 22:38:05,567 INFO L226 Difference]: Without dead ends: 184 [2020-10-21 22:38:05,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:38:05,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-21 22:38:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 135. [2020-10-21 22:38:05,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-21 22:38:05,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 341 transitions. [2020-10-21 22:38:05,571 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 341 transitions. Word has length 13 [2020-10-21 22:38:05,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:05,572 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 341 transitions. [2020-10-21 22:38:05,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:05,572 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 341 transitions. [2020-10-21 22:38:05,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:05,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:05,573 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:05,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-21 22:38:05,779 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:05,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:05,779 INFO L82 PathProgramCache]: Analyzing trace with hash -631308487, now seen corresponding path program 31 times [2020-10-21 22:38:05,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:05,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565184164] [2020-10-21 22:38:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:05,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565184164] [2020-10-21 22:38:05,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791014317] [2020-10-21 22:38:05,877 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 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 [2020-10-21 22:38:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:05,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:05,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:06,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:06,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:06,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:38:06,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570216454] [2020-10-21 22:38:06,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:38:06,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:06,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:38:06,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:38:06,066 INFO L87 Difference]: Start difference. First operand 135 states and 341 transitions. Second operand 15 states. [2020-10-21 22:38:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:06,692 INFO L93 Difference]: Finished difference Result 218 states and 521 transitions. [2020-10-21 22:38:06,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 22:38:06,693 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:38:06,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:06,695 INFO L225 Difference]: With dead ends: 218 [2020-10-21 22:38:06,695 INFO L226 Difference]: Without dead ends: 213 [2020-10-21 22:38:06,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-21 22:38:06,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-21 22:38:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 134. [2020-10-21 22:38:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-21 22:38:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 336 transitions. [2020-10-21 22:38:06,699 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 336 transitions. Word has length 13 [2020-10-21 22:38:06,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:06,700 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 336 transitions. [2020-10-21 22:38:06,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:06,700 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 336 transitions. [2020-10-21 22:38:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:06,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:06,701 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:06,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-21 22:38:06,902 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:06,902 INFO L82 PathProgramCache]: Analyzing trace with hash -631279657, now seen corresponding path program 32 times [2020-10-21 22:38:06,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:06,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422006218] [2020-10-21 22:38:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:07,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422006218] [2020-10-21 22:38:07,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593326887] [2020-10-21 22:38:07,007 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 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 [2020-10-21 22:38:07,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:38:07,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:07,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:07,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:07,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:38:11,126 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-21 22:38:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:11,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:11,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 22:38:11,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227854446] [2020-10-21 22:38:11,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:38:11,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:11,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:38:11,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-21 22:38:11,130 INFO L87 Difference]: Start difference. First operand 134 states and 336 transitions. Second operand 16 states. [2020-10-21 22:38:13,660 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-21 22:38:48,821 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 40 DAG size of output: 25 Received shutdown request... [2020-10-21 22:38:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:38:51,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:51,064 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-21 22:38:51,068 WARN L235 ceAbstractionStarter]: Timeout [2020-10-21 22:38:51,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 10:38:51 BasicIcfg [2020-10-21 22:38:51,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 22:38:51,070 INFO L168 Benchmark]: Toolchain (without parser) took 280227.31 ms. Allocated memory was 138.4 MB in the beginning and 342.4 MB in the end (delta: 203.9 MB). Free memory was 100.7 MB in the beginning and 158.7 MB in the end (delta: -58.0 MB). Peak memory consumption was 145.9 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:51,070 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-10-21 22:38:51,071 INFO L168 Benchmark]: CACSL2BoogieTranslator took 662.51 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 99.7 MB in the beginning and 157.2 MB in the end (delta: -57.5 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:51,074 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.45 ms. Allocated memory is still 201.3 MB. Free memory was 157.2 MB in the beginning and 155.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:51,075 INFO L168 Benchmark]: Boogie Preprocessor took 30.18 ms. Allocated memory is still 201.3 MB. Free memory was 155.0 MB in the beginning and 153.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:51,075 INFO L168 Benchmark]: RCFGBuilder took 586.70 ms. Allocated memory is still 201.3 MB. Free memory was 153.6 MB in the beginning and 131.3 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:51,076 INFO L168 Benchmark]: TraceAbstraction took 278887.93 ms. Allocated memory was 201.3 MB in the beginning and 342.4 MB in the end (delta: 141.0 MB). Free memory was 130.6 MB in the beginning and 158.7 MB in the end (delta: -28.1 MB). Peak memory consumption was 112.9 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:51,077 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 662.51 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 99.7 MB in the beginning and 157.2 MB in the end (delta: -57.5 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 49.45 ms. Allocated memory is still 201.3 MB. Free memory was 157.2 MB in the beginning and 155.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.18 ms. Allocated memory is still 201.3 MB. Free memory was 155.0 MB in the beginning and 153.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 586.70 ms. Allocated memory is still 201.3 MB. Free memory was 153.6 MB in the beginning and 131.3 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 278887.93 ms. Allocated memory was 201.3 MB in the beginning and 342.4 MB in the end (delta: 141.0 MB). Free memory was 130.6 MB in the beginning and 158.7 MB in the end (delta: -28.1 MB). Peak memory consumption was 112.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 710 VarBasedMoverChecksPositive, 10 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.7s, 67 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 16 TransitionsAfterwards, 1272 CoEnabledTransitionPairs, 6 FixpointIterations, 16 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 3 ChoiceCompositions, 65 TotalNumberOfCompositions, 1183 MoverChecksTotal - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (134states) and FLOYD_HOARE automaton (currently 27 states, 16 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 278.7s, OverallIterations: 43, TraceHistogramMax: 5, AutomataDifference: 232.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 562 SDtfs, 4522 SDslu, 3597 SDs, 0 SdLazy, 2619 SolverSat, 801 SolverUnsat, 63 SolverUnknown, 0 SolverNotchecked, 122.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1086 GetRequests, 184 SyntacticMatches, 33 SemanticMatches, 868 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4591 ImplicationChecksByTransitivity, 138.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=135occurred in iteration=41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 42 MinimizatonAttempts, 1858 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 33.4s InterpolantComputationTime, 946 NumberOfCodeBlocks, 946 NumberOfCodeBlocksAsserted, 120 NumberOfCheckSat, 865 ConstructedInterpolants, 7 QuantifiedInterpolants, 79421 SizeOfPredicates, 38 NumberOfNonLiveVariables, 3696 ConjunctsInSsa, 348 ConjunctsInUnsatCore, 81 InterpolantComputations, 5 PerfectInterpolantSequences, 0/274 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