/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-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 13:56:47,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 13:56:47,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 13:56:47,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 13:56:47,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 13:56:47,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 13:56:47,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 13:56:47,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 13:56:47,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 13:56:47,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 13:56:47,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 13:56:47,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 13:56:47,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 13:56:47,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 13:56:47,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 13:56:47,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 13:56:47,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 13:56:47,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 13:56:47,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 13:56:47,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 13:56:47,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 13:56:47,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 13:56:47,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 13:56:47,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 13:56:47,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 13:56:47,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 13:56:47,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 13:56:47,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 13:56:47,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 13:56:47,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 13:56:47,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 13:56:47,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 13:56:47,547 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 13:56:47,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 13:56:47,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 13:56:47,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 13:56:47,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 13:56:47,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 13:56:47,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 13:56:47,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 13:56:47,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 13:56:47,552 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-10-16 13:56:47,576 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 13:56:47,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 13:56:47,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 13:56:47,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 13:56:47,578 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 13:56:47,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 13:56:47,579 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 13:56:47,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 13:56:47,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 13:56:47,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 13:56:47,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 13:56:47,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 13:56:47,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 13:56:47,580 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 13:56:47,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 13:56:47,581 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 13:56:47,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 13:56:47,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 13:56:47,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 13:56:47,581 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 13:56:47,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 13:56:47,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 13:56:47,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 13:56:47,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 13:56:47,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 13:56:47,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 13:56:47,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 13:56:47,583 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-16 13:56:47,583 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 13:56:47,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 13:56:47,584 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-16 13:56:47,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 13:56:47,861 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 13:56:47,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 13:56:47,867 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 13:56:47,868 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 13:56:47,869 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-16 13:56:47,945 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/61865cc3f/1c2b60cfd2804d19a6eab22a8afe8cc7/FLAGe24707801 [2020-10-16 13:56:48,633 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 13:56:48,634 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-16 13:56:48,665 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/61865cc3f/1c2b60cfd2804d19a6eab22a8afe8cc7/FLAGe24707801 [2020-10-16 13:56:48,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/61865cc3f/1c2b60cfd2804d19a6eab22a8afe8cc7 [2020-10-16 13:56:48,837 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 13:56:48,839 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 13:56:48,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 13:56:48,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 13:56:48,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 13:56:48,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:56:48" (1/1) ... [2020-10-16 13:56:48,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672b7069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:56:48, skipping insertion in model container [2020-10-16 13:56:48,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:56:48" (1/1) ... [2020-10-16 13:56:48,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 13:56:48,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 13:56:49,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 13:56:49,620 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 13:56:49,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 13:56:50,032 INFO L208 MainTranslator]: Completed translation [2020-10-16 13:56:50,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:56:50 WrapperNode [2020-10-16 13:56:50,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 13:56:50,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 13:56:50,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 13:56:50,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 13:56:50,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:56:50" (1/1) ... [2020-10-16 13:56:50,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:56:50" (1/1) ... [2020-10-16 13:56:50,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 13:56:50,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 13:56:50,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 13:56:50,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 13:56:50,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:56:50" (1/1) ... [2020-10-16 13:56:50,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:56:50" (1/1) ... [2020-10-16 13:56:50,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:56:50" (1/1) ... [2020-10-16 13:56:50,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:56:50" (1/1) ... [2020-10-16 13:56:50,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:56:50" (1/1) ... [2020-10-16 13:56:50,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:56:50" (1/1) ... [2020-10-16 13:56:50,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:56:50" (1/1) ... [2020-10-16 13:56:50,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 13:56:50,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 13:56:50,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 13:56:50,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 13:56:50,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:56:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 13:56:50,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 13:56:50,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 13:56:50,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 13:56:50,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 13:56:50,230 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-16 13:56:50,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-10-16 13:56:50,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-10-16 13:56:50,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-16 13:56:50,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 13:56:50,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 13:56:50,233 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 13:56:50,674 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 13:56:50,674 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-16 13:56:50,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:56:50 BoogieIcfgContainer [2020-10-16 13:56:50,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 13:56:50,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 13:56:50,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 13:56:50,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 13:56:50,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:56:48" (1/3) ... [2020-10-16 13:56:50,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb27eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:56:50, skipping insertion in model container [2020-10-16 13:56:50,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:56:50" (2/3) ... [2020-10-16 13:56:50,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb27eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:56:50, skipping insertion in model container [2020-10-16 13:56:50,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:56:50" (3/3) ... [2020-10-16 13:56:50,686 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-10-16 13:56:50,699 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 13:56:50,699 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 13:56:50,708 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 13:56:50,709 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 13:56:50,744 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,744 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,745 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,745 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,745 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,745 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,746 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,746 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,746 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,746 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,746 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,747 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,747 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,747 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,748 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,748 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,748 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,748 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,749 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,749 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,749 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,749 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,749 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,753 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,754 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,754 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,754 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,754 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,755 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,755 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,755 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,755 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 13:56:50,761 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2020-10-16 13:56:50,774 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 13:56:50,793 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 13:56:50,793 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 13:56:50,793 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 13:56:50,793 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-16 13:56:50,793 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 13:56:50,793 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 13:56:50,793 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 13:56:50,794 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 13:56:50,807 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 13:56:50,808 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 170 flow [2020-10-16 13:56:50,810 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 81 transitions, 170 flow [2020-10-16 13:56:50,812 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-10-16 13:56:50,857 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-10-16 13:56:50,857 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 13:56:50,863 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-10-16 13:56:50,865 INFO L117 LiptonReduction]: Number of co-enabled transitions 646 [2020-10-16 13:56:52,797 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-10-16 13:56:52,969 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-16 13:56:53,656 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-10-16 13:56:53,912 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-16 13:56:53,927 INFO L132 LiptonReduction]: Checked pairs total: 823 [2020-10-16 13:56:53,928 INFO L134 LiptonReduction]: Total number of compositions: 75 [2020-10-16 13:56:53,935 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-10-16 13:56:53,945 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-10-16 13:56:53,948 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-16 13:56:53,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 13:56:53,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:56:53,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:56:53,957 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:56:53,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:56:53,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1717538151, now seen corresponding path program 1 times [2020-10-16 13:56:53,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:56:53,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86117227] [2020-10-16 13:56:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:56:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:56:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 13:56:54,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86117227] [2020-10-16 13:56:54,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 13:56:54,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 13:56:54,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [441239467] [2020-10-16 13:56:54,192 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:56:54,196 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:56:54,211 INFO L258 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-10-16 13:56:54,212 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:56:54,252 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [154#(< ULTIMATE.start_main_~i~1 20)] [2020-10-16 13:56:54,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 13:56:54,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:56:54,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 13:56:54,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 13:56:54,271 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 4 states. [2020-10-16 13:56:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:56:54,312 INFO L93 Difference]: Finished difference Result 58 states and 112 transitions. [2020-10-16 13:56:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 13:56:54,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-16 13:56:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:56:54,326 INFO L225 Difference]: With dead ends: 58 [2020-10-16 13:56:54,326 INFO L226 Difference]: Without dead ends: 58 [2020-10-16 13:56:54,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 13:56:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-16 13:56:54,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-16 13:56:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 13:56:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 112 transitions. [2020-10-16 13:56:54,373 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 112 transitions. Word has length 8 [2020-10-16 13:56:54,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:56:54,373 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 112 transitions. [2020-10-16 13:56:54,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 13:56:54,374 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 112 transitions. [2020-10-16 13:56:54,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 13:56:54,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:56:54,375 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:56:54,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 13:56:54,376 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:56:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:56:54,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1202349723, now seen corresponding path program 1 times [2020-10-16 13:56:54,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:56:54,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495584885] [2020-10-16 13:56:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:56:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:56:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 13:56:54,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495584885] [2020-10-16 13:56:54,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 13:56:54,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 13:56:54,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [844574424] [2020-10-16 13:56:54,499 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:56:54,501 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:56:54,509 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 46 transitions. [2020-10-16 13:56:54,510 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:56:54,584 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [332#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-16 13:56:54,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 13:56:54,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:56:54,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 13:56:54,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 13:56:54,587 INFO L87 Difference]: Start difference. First operand 58 states and 112 transitions. Second operand 4 states. [2020-10-16 13:56:54,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:56:54,613 INFO L93 Difference]: Finished difference Result 103 states and 202 transitions. [2020-10-16 13:56:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 13:56:54,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-16 13:56:54,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:56:54,616 INFO L225 Difference]: With dead ends: 103 [2020-10-16 13:56:54,616 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 13:56:54,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 13:56:54,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 13:56:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-16 13:56:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-16 13:56:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 202 transitions. [2020-10-16 13:56:54,631 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 202 transitions. Word has length 14 [2020-10-16 13:56:54,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:56:54,632 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 202 transitions. [2020-10-16 13:56:54,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 13:56:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 202 transitions. [2020-10-16 13:56:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 13:56:54,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:56:54,634 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:56:54,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 13:56:54,634 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:56:54,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:56:54,635 INFO L82 PathProgramCache]: Analyzing trace with hash -570543039, now seen corresponding path program 1 times [2020-10-16 13:56:54,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:56:54,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357417932] [2020-10-16 13:56:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:56:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:56:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 13:56:54,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357417932] [2020-10-16 13:56:54,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 13:56:54,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 13:56:54,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1759695728] [2020-10-16 13:56:54,731 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:56:54,737 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:56:54,748 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 40 transitions. [2020-10-16 13:56:54,748 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:56:54,776 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 13:56:54,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 13:56:54,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:56:54,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 13:56:54,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 13:56:54,778 INFO L87 Difference]: Start difference. First operand 103 states and 202 transitions. Second operand 3 states. [2020-10-16 13:56:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:56:54,796 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2020-10-16 13:56:54,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 13:56:54,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-16 13:56:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:56:54,798 INFO L225 Difference]: With dead ends: 79 [2020-10-16 13:56:54,798 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 13:56:54,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 13:56:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 13:56:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-16 13:56:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 13:56:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-10-16 13:56:54,807 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 22 [2020-10-16 13:56:54,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:56:54,808 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-10-16 13:56:54,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 13:56:54,808 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-10-16 13:56:54,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 13:56:54,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:56:54,810 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:56:54,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 13:56:54,810 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:56:54,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:56:54,811 INFO L82 PathProgramCache]: Analyzing trace with hash 485096059, now seen corresponding path program 2 times [2020-10-16 13:56:54,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:56:54,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870424924] [2020-10-16 13:56:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:56:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:56:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 13:56:54,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870424924] [2020-10-16 13:56:54,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468519987] [2020-10-16 13:56:54,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:56:55,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 13:56:55,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:56:55,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 13:56:55,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:56:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 13:56:55,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:56:55,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-10-16 13:56:55,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [56569473] [2020-10-16 13:56:55,177 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:56:55,180 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:56:55,187 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 38 transitions. [2020-10-16 13:56:55,187 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:56:55,223 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [953#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:56:55,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 13:56:55,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:56:55,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 13:56:55,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-16 13:56:55,225 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 6 states. [2020-10-16 13:56:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:56:55,270 INFO L93 Difference]: Finished difference Result 110 states and 168 transitions. [2020-10-16 13:56:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 13:56:55,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-16 13:56:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:56:55,272 INFO L225 Difference]: With dead ends: 110 [2020-10-16 13:56:55,272 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 13:56:55,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-16 13:56:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 13:56:55,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-10-16 13:56:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-16 13:56:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 154 transitions. [2020-10-16 13:56:55,283 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 154 transitions. Word has length 22 [2020-10-16 13:56:55,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:56:55,284 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 154 transitions. [2020-10-16 13:56:55,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 13:56:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 154 transitions. [2020-10-16 13:56:55,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 13:56:55,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:56:55,286 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:56:55,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:56:55,500 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:56:55,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:56:55,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2041399383, now seen corresponding path program 3 times [2020-10-16 13:56:55,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:56:55,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889303324] [2020-10-16 13:56:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:56:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:56:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 13:56:55,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889303324] [2020-10-16 13:56:55,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68274859] [2020-10-16 13:56:55,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:56:55,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 13:56:55,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:56:55,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 13:56:55,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:56:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 13:56:55,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:56:55,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2020-10-16 13:56:55,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [771369050] [2020-10-16 13:56:55,720 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:56:55,724 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:56:55,731 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2020-10-16 13:56:55,731 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:56:55,765 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1345#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-16 13:56:55,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 13:56:55,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:56:55,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 13:56:55,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-16 13:56:55,767 INFO L87 Difference]: Start difference. First operand 100 states and 154 transitions. Second operand 6 states. [2020-10-16 13:56:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:56:55,798 INFO L93 Difference]: Finished difference Result 160 states and 238 transitions. [2020-10-16 13:56:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 13:56:55,799 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-16 13:56:55,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:56:55,801 INFO L225 Difference]: With dead ends: 160 [2020-10-16 13:56:55,801 INFO L226 Difference]: Without dead ends: 160 [2020-10-16 13:56:55,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-16 13:56:55,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-16 13:56:55,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-16 13:56:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-16 13:56:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2020-10-16 13:56:55,814 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 25 [2020-10-16 13:56:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:56:55,814 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2020-10-16 13:56:55,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 13:56:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2020-10-16 13:56:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-16 13:56:55,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:56:55,817 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:56:56,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:56:56,033 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:56:56,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:56:56,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2012714619, now seen corresponding path program 4 times [2020-10-16 13:56:56,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:56:56,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688788410] [2020-10-16 13:56:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:56:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:56:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 13:56:56,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688788410] [2020-10-16 13:56:56,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482882157] [2020-10-16 13:56:56,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:56:56,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 13:56:56,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:56:56,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 13:56:56,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:56:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 13:56:56,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:56:56,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 13:56:56,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1183087375] [2020-10-16 13:56:56,242 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:56:56,251 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:56:56,268 INFO L258 McrAutomatonBuilder]: Finished intersection with 45 states and 55 transitions. [2020-10-16 13:56:56,269 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:56:56,315 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1930#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-16 13:56:56,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 13:56:56,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:56:56,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 13:56:56,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-16 13:56:56,316 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand 8 states. [2020-10-16 13:56:56,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:56:56,361 INFO L93 Difference]: Finished difference Result 220 states and 322 transitions. [2020-10-16 13:56:56,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 13:56:56,361 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-16 13:56:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:56:56,363 INFO L225 Difference]: With dead ends: 220 [2020-10-16 13:56:56,364 INFO L226 Difference]: Without dead ends: 220 [2020-10-16 13:56:56,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-16 13:56:56,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-16 13:56:56,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2020-10-16 13:56:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-16 13:56:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 322 transitions. [2020-10-16 13:56:56,379 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 322 transitions. Word has length 33 [2020-10-16 13:56:56,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:56:56,379 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 322 transitions. [2020-10-16 13:56:56,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 13:56:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 322 transitions. [2020-10-16 13:56:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-16 13:56:56,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:56:56,382 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:56:56,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:56:56,597 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:56:56,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:56:56,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1068728479, now seen corresponding path program 5 times [2020-10-16 13:56:56,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:56:56,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951679526] [2020-10-16 13:56:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:56:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:56:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 13:56:56,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951679526] [2020-10-16 13:56:56,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862300095] [2020-10-16 13:56:56,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:56:56,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 13:56:56,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:56:56,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 13:56:56,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:56:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 13:56:56,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:56:56,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 13:56:56,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [122082040] [2020-10-16 13:56:56,841 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:56:56,849 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:56:56,868 INFO L258 McrAutomatonBuilder]: Finished intersection with 53 states and 63 transitions. [2020-10-16 13:56:56,868 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:56:56,906 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2721#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-16 13:56:56,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 13:56:56,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:56:56,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 13:56:56,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-16 13:56:56,907 INFO L87 Difference]: Start difference. First operand 220 states and 322 transitions. Second operand 10 states. [2020-10-16 13:56:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:56:56,956 INFO L93 Difference]: Finished difference Result 280 states and 406 transitions. [2020-10-16 13:56:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 13:56:56,957 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-16 13:56:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:56:56,959 INFO L225 Difference]: With dead ends: 280 [2020-10-16 13:56:56,959 INFO L226 Difference]: Without dead ends: 280 [2020-10-16 13:56:56,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-16 13:56:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-16 13:56:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2020-10-16 13:56:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-16 13:56:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 406 transitions. [2020-10-16 13:56:56,970 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 406 transitions. Word has length 41 [2020-10-16 13:56:56,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:56:56,970 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 406 transitions. [2020-10-16 13:56:56,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 13:56:56,971 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 406 transitions. [2020-10-16 13:56:56,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-16 13:56:56,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:56:56,972 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:56:57,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:56:57,187 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:56:57,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:56:57,188 INFO L82 PathProgramCache]: Analyzing trace with hash 2088433981, now seen corresponding path program 6 times [2020-10-16 13:56:57,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:56:57,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298347694] [2020-10-16 13:56:57,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:56:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:56:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 13:56:57,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298347694] [2020-10-16 13:56:57,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420128041] [2020-10-16 13:56:57,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:56:57,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 13:56:57,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:56:57,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 13:56:57,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:56:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-16 13:56:57,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:56:57,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-10-16 13:56:57,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [227803528] [2020-10-16 13:56:57,507 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:56:57,523 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:56:57,610 INFO L258 McrAutomatonBuilder]: Finished intersection with 61 states and 71 transitions. [2020-10-16 13:56:57,611 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:56:57,681 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3721#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-16 13:56:57,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 13:56:57,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:56:57,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 13:56:57,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-16 13:56:57,687 INFO L87 Difference]: Start difference. First operand 280 states and 406 transitions. Second operand 12 states. [2020-10-16 13:56:57,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:56:57,759 INFO L93 Difference]: Finished difference Result 340 states and 490 transitions. [2020-10-16 13:56:57,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 13:56:57,762 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-16 13:56:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:56:57,765 INFO L225 Difference]: With dead ends: 340 [2020-10-16 13:56:57,765 INFO L226 Difference]: Without dead ends: 340 [2020-10-16 13:56:57,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-16 13:56:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-16 13:56:57,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2020-10-16 13:56:57,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-16 13:56:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 490 transitions. [2020-10-16 13:56:57,776 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 490 transitions. Word has length 49 [2020-10-16 13:56:57,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:56:57,777 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 490 transitions. [2020-10-16 13:56:57,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 13:56:57,777 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 490 transitions. [2020-10-16 13:56:57,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-16 13:56:57,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:56:57,779 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:56:57,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:56:57,992 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:56:57,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:56:57,993 INFO L82 PathProgramCache]: Analyzing trace with hash -303048935, now seen corresponding path program 7 times [2020-10-16 13:56:57,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:56:57,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901735287] [2020-10-16 13:56:57,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:56:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:56:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 13:56:58,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901735287] [2020-10-16 13:56:58,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620416986] [2020-10-16 13:56:58,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:56:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:56:58,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 13:56:58,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:56:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 13:56:58,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:56:58,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 13:56:58,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [674389669] [2020-10-16 13:56:58,433 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:56:58,459 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:56:58,504 INFO L258 McrAutomatonBuilder]: Finished intersection with 69 states and 79 transitions. [2020-10-16 13:56:58,504 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:56:58,547 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4924#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-16 13:56:58,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 13:56:58,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:56:58,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 13:56:58,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-16 13:56:58,549 INFO L87 Difference]: Start difference. First operand 340 states and 490 transitions. Second operand 14 states. [2020-10-16 13:56:58,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:56:58,623 INFO L93 Difference]: Finished difference Result 400 states and 574 transitions. [2020-10-16 13:56:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 13:56:58,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-16 13:56:58,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:56:58,629 INFO L225 Difference]: With dead ends: 400 [2020-10-16 13:56:58,629 INFO L226 Difference]: Without dead ends: 400 [2020-10-16 13:56:58,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-16 13:56:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-10-16 13:56:58,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2020-10-16 13:56:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-10-16 13:56:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 574 transitions. [2020-10-16 13:56:58,641 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 574 transitions. Word has length 57 [2020-10-16 13:56:58,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:56:58,642 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 574 transitions. [2020-10-16 13:56:58,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 13:56:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 574 transitions. [2020-10-16 13:56:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-16 13:56:58,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:56:58,644 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:56:58,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:56:58,859 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:56:58,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:56:58,859 INFO L82 PathProgramCache]: Analyzing trace with hash 705108213, now seen corresponding path program 8 times [2020-10-16 13:56:58,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:56:58,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622773788] [2020-10-16 13:56:58,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:56:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:56:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 7 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 13:56:59,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622773788] [2020-10-16 13:56:59,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076236503] [2020-10-16 13:56:59,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:56:59,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 13:56:59,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:56:59,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 13:56:59,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:56:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 7 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 13:56:59,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:56:59,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 13:56:59,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [115128935] [2020-10-16 13:56:59,223 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:56:59,245 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:56:59,301 INFO L258 McrAutomatonBuilder]: Finished intersection with 77 states and 87 transitions. [2020-10-16 13:56:59,301 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:56:59,342 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6333#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-16 13:56:59,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 13:56:59,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:56:59,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 13:56:59,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-16 13:56:59,344 INFO L87 Difference]: Start difference. First operand 400 states and 574 transitions. Second operand 16 states. [2020-10-16 13:56:59,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:56:59,440 INFO L93 Difference]: Finished difference Result 460 states and 658 transitions. [2020-10-16 13:56:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 13:56:59,440 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-16 13:56:59,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:56:59,443 INFO L225 Difference]: With dead ends: 460 [2020-10-16 13:56:59,444 INFO L226 Difference]: Without dead ends: 460 [2020-10-16 13:56:59,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-16 13:56:59,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-16 13:56:59,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2020-10-16 13:56:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-10-16 13:56:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 658 transitions. [2020-10-16 13:56:59,456 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 658 transitions. Word has length 65 [2020-10-16 13:56:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:56:59,457 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 658 transitions. [2020-10-16 13:56:59,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 13:56:59,457 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 658 transitions. [2020-10-16 13:56:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-16 13:56:59,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:56:59,459 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:56:59,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 13:56:59,675 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:56:59,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:56:59,675 INFO L82 PathProgramCache]: Analyzing trace with hash 706526929, now seen corresponding path program 9 times [2020-10-16 13:56:59,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:56:59,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062173634] [2020-10-16 13:56:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:56:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:56:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 7 proven. 378 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 13:56:59,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062173634] [2020-10-16 13:56:59,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951901774] [2020-10-16 13:56:59,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:00,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 13:57:00,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:00,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 13:57:00,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-10-16 13:57:00,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:00,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2020-10-16 13:57:00,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1911612187] [2020-10-16 13:57:00,079 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:00,099 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:00,165 INFO L258 McrAutomatonBuilder]: Finished intersection with 85 states and 95 transitions. [2020-10-16 13:57:00,165 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:00,230 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7951#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-16 13:57:00,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 13:57:00,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:00,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 13:57:00,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-16 13:57:00,232 INFO L87 Difference]: Start difference. First operand 460 states and 658 transitions. Second operand 18 states. [2020-10-16 13:57:00,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:00,323 INFO L93 Difference]: Finished difference Result 520 states and 742 transitions. [2020-10-16 13:57:00,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 13:57:00,323 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-10-16 13:57:00,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:00,326 INFO L225 Difference]: With dead ends: 520 [2020-10-16 13:57:00,327 INFO L226 Difference]: Without dead ends: 520 [2020-10-16 13:57:00,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-16 13:57:00,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-10-16 13:57:00,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2020-10-16 13:57:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-10-16 13:57:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 742 transitions. [2020-10-16 13:57:00,339 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 742 transitions. Word has length 73 [2020-10-16 13:57:00,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:00,339 INFO L481 AbstractCegarLoop]: Abstraction has 520 states and 742 transitions. [2020-10-16 13:57:00,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 13:57:00,339 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 742 transitions. [2020-10-16 13:57:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-16 13:57:00,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:00,341 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:00,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-16 13:57:00,556 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:00,557 INFO L82 PathProgramCache]: Analyzing trace with hash -879966035, now seen corresponding path program 10 times [2020-10-16 13:57:00,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:00,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708080070] [2020-10-16 13:57:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 7 proven. 496 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 13:57:00,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708080070] [2020-10-16 13:57:00,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444398559] [2020-10-16 13:57:00,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:01,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 13:57:01,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:01,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 13:57:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:01,152 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 7 proven. 496 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 13:57:01,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:01,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 13:57:01,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2096117762] [2020-10-16 13:57:01,153 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:01,183 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:01,282 INFO L258 McrAutomatonBuilder]: Finished intersection with 93 states and 103 transitions. [2020-10-16 13:57:01,282 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:01,722 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9772#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-16 13:57:01,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 13:57:01,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:01,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 13:57:01,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-16 13:57:01,723 INFO L87 Difference]: Start difference. First operand 520 states and 742 transitions. Second operand 20 states. [2020-10-16 13:57:01,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:01,827 INFO L93 Difference]: Finished difference Result 580 states and 826 transitions. [2020-10-16 13:57:01,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 13:57:01,828 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-10-16 13:57:01,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:01,831 INFO L225 Difference]: With dead ends: 580 [2020-10-16 13:57:01,832 INFO L226 Difference]: Without dead ends: 580 [2020-10-16 13:57:01,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-16 13:57:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2020-10-16 13:57:01,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2020-10-16 13:57:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2020-10-16 13:57:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 826 transitions. [2020-10-16 13:57:01,846 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 826 transitions. Word has length 81 [2020-10-16 13:57:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:01,846 INFO L481 AbstractCegarLoop]: Abstraction has 580 states and 826 transitions. [2020-10-16 13:57:01,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 13:57:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 826 transitions. [2020-10-16 13:57:01,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-16 13:57:01,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:01,855 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:02,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:02,068 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash -810338679, now seen corresponding path program 11 times [2020-10-16 13:57:02,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:02,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729593362] [2020-10-16 13:57:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 7 proven. 630 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 13:57:02,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729593362] [2020-10-16 13:57:02,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326895252] [2020-10-16 13:57:02,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:02,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-10-16 13:57:02,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:02,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 13:57:02,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 7 proven. 630 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 13:57:02,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:02,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 13:57:02,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [249261087] [2020-10-16 13:57:02,587 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:02,620 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:02,788 INFO L258 McrAutomatonBuilder]: Finished intersection with 101 states and 111 transitions. [2020-10-16 13:57:02,788 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:02,827 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11799#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-16 13:57:02,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 13:57:02,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:02,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 13:57:02,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-16 13:57:02,829 INFO L87 Difference]: Start difference. First operand 580 states and 826 transitions. Second operand 22 states. [2020-10-16 13:57:02,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:02,943 INFO L93 Difference]: Finished difference Result 640 states and 910 transitions. [2020-10-16 13:57:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 13:57:02,945 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 89 [2020-10-16 13:57:02,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:02,948 INFO L225 Difference]: With dead ends: 640 [2020-10-16 13:57:02,949 INFO L226 Difference]: Without dead ends: 640 [2020-10-16 13:57:02,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-16 13:57:02,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-10-16 13:57:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 640. [2020-10-16 13:57:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2020-10-16 13:57:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 910 transitions. [2020-10-16 13:57:02,962 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 910 transitions. Word has length 89 [2020-10-16 13:57:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:02,963 INFO L481 AbstractCegarLoop]: Abstraction has 640 states and 910 transitions. [2020-10-16 13:57:02,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 13:57:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 910 transitions. [2020-10-16 13:57:02,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-16 13:57:02,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:02,965 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:03,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:03,179 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:03,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:03,180 INFO L82 PathProgramCache]: Analyzing trace with hash -605288347, now seen corresponding path program 12 times [2020-10-16 13:57:03,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:03,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665544593] [2020-10-16 13:57:03,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:03,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665544593] [2020-10-16 13:57:03,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375562272] [2020-10-16 13:57:03,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:03,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 13:57:03,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:03,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 13:57:03,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:03,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:03,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 13:57:03,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [937796056] [2020-10-16 13:57:03,413 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:03,456 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:03,693 INFO L258 McrAutomatonBuilder]: Finished intersection with 109 states and 119 transitions. [2020-10-16 13:57:03,693 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:03,745 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14015#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:03,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 13:57:03,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:03,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 13:57:03,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-16 13:57:03,746 INFO L87 Difference]: Start difference. First operand 640 states and 910 transitions. Second operand 7 states. [2020-10-16 13:57:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:03,799 INFO L93 Difference]: Finished difference Result 815 states and 1116 transitions. [2020-10-16 13:57:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 13:57:03,800 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-16 13:57:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:03,803 INFO L225 Difference]: With dead ends: 815 [2020-10-16 13:57:03,804 INFO L226 Difference]: Without dead ends: 815 [2020-10-16 13:57:03,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-16 13:57:03,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2020-10-16 13:57:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 769. [2020-10-16 13:57:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 769 states. [2020-10-16 13:57:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1066 transitions. [2020-10-16 13:57:03,819 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1066 transitions. Word has length 97 [2020-10-16 13:57:03,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:03,820 INFO L481 AbstractCegarLoop]: Abstraction has 769 states and 1066 transitions. [2020-10-16 13:57:03,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 13:57:03,820 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1066 transitions. [2020-10-16 13:57:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-16 13:57:03,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:03,822 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:04,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-16 13:57:04,033 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:04,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:04,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1449388415, now seen corresponding path program 13 times [2020-10-16 13:57:04,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:04,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128943031] [2020-10-16 13:57:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:04,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128943031] [2020-10-16 13:57:04,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951169687] [2020-10-16 13:57:04,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:04,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 13:57:04,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:04,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:04,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 13:57:04,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1654272414] [2020-10-16 13:57:04,298 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:04,348 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:04,980 INFO L258 McrAutomatonBuilder]: Finished intersection with 115 states and 128 transitions. [2020-10-16 13:57:04,980 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:05,044 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16674#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:05,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 13:57:05,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:05,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 13:57:05,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-16 13:57:05,045 INFO L87 Difference]: Start difference. First operand 769 states and 1066 transitions. Second operand 8 states. [2020-10-16 13:57:05,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:05,096 INFO L93 Difference]: Finished difference Result 944 states and 1272 transitions. [2020-10-16 13:57:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 13:57:05,097 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 100 [2020-10-16 13:57:05,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:05,101 INFO L225 Difference]: With dead ends: 944 [2020-10-16 13:57:05,102 INFO L226 Difference]: Without dead ends: 944 [2020-10-16 13:57:05,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-16 13:57:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2020-10-16 13:57:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 898. [2020-10-16 13:57:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-10-16 13:57:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1222 transitions. [2020-10-16 13:57:05,122 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1222 transitions. Word has length 100 [2020-10-16 13:57:05,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:05,123 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1222 transitions. [2020-10-16 13:57:05,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 13:57:05,123 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1222 transitions. [2020-10-16 13:57:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-16 13:57:05,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:05,127 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:05,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 13:57:05,342 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:05,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:05,342 INFO L82 PathProgramCache]: Analyzing trace with hash 450902565, now seen corresponding path program 14 times [2020-10-16 13:57:05,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:05,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410518940] [2020-10-16 13:57:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:05,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410518940] [2020-10-16 13:57:05,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103465021] [2020-10-16 13:57:05,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:05,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 13:57:05,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:05,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 13:57:05,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:05,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:05,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 13:57:05,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1114950998] [2020-10-16 13:57:05,651 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:05,701 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:05,856 INFO L258 McrAutomatonBuilder]: Finished intersection with 121 states and 137 transitions. [2020-10-16 13:57:05,856 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:05,929 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19730#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:05,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 13:57:05,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:05,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 13:57:05,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-16 13:57:05,930 INFO L87 Difference]: Start difference. First operand 898 states and 1222 transitions. Second operand 9 states. [2020-10-16 13:57:05,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:05,980 INFO L93 Difference]: Finished difference Result 1073 states and 1428 transitions. [2020-10-16 13:57:05,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 13:57:05,981 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 103 [2020-10-16 13:57:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:05,985 INFO L225 Difference]: With dead ends: 1073 [2020-10-16 13:57:05,986 INFO L226 Difference]: Without dead ends: 1073 [2020-10-16 13:57:05,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-16 13:57:05,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2020-10-16 13:57:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1027. [2020-10-16 13:57:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1027 states. [2020-10-16 13:57:06,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1378 transitions. [2020-10-16 13:57:06,008 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1378 transitions. Word has length 103 [2020-10-16 13:57:06,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:06,008 INFO L481 AbstractCegarLoop]: Abstraction has 1027 states and 1378 transitions. [2020-10-16 13:57:06,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 13:57:06,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1378 transitions. [2020-10-16 13:57:06,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-16 13:57:06,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:06,011 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:06,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 13:57:06,225 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:06,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:06,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1502437311, now seen corresponding path program 15 times [2020-10-16 13:57:06,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:06,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733964249] [2020-10-16 13:57:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:06,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733964249] [2020-10-16 13:57:06,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118126340] [2020-10-16 13:57:06,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:06,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 13:57:06,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:06,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 13:57:06,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:06,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:06,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 13:57:06,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [619117400] [2020-10-16 13:57:06,546 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:06,605 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:06,817 INFO L258 McrAutomatonBuilder]: Finished intersection with 127 states and 146 transitions. [2020-10-16 13:57:06,817 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:06,908 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23183#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:06,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 13:57:06,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:06,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 13:57:06,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-10-16 13:57:06,909 INFO L87 Difference]: Start difference. First operand 1027 states and 1378 transitions. Second operand 10 states. [2020-10-16 13:57:06,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:06,979 INFO L93 Difference]: Finished difference Result 1202 states and 1584 transitions. [2020-10-16 13:57:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 13:57:06,982 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-10-16 13:57:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:06,987 INFO L225 Difference]: With dead ends: 1202 [2020-10-16 13:57:06,987 INFO L226 Difference]: Without dead ends: 1202 [2020-10-16 13:57:06,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-10-16 13:57:06,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2020-10-16 13:57:07,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1156. [2020-10-16 13:57:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2020-10-16 13:57:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1534 transitions. [2020-10-16 13:57:07,014 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1534 transitions. Word has length 106 [2020-10-16 13:57:07,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:07,015 INFO L481 AbstractCegarLoop]: Abstraction has 1156 states and 1534 transitions. [2020-10-16 13:57:07,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 13:57:07,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1534 transitions. [2020-10-16 13:57:07,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-16 13:57:07,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:07,021 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:07,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:07,235 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:07,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:07,236 INFO L82 PathProgramCache]: Analyzing trace with hash 282598373, now seen corresponding path program 16 times [2020-10-16 13:57:07,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:07,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934444381] [2020-10-16 13:57:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:07,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934444381] [2020-10-16 13:57:07,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168624592] [2020-10-16 13:57:07,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:08,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 13:57:08,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:08,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 13:57:08,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:08,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:08,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 13:57:08,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1271763011] [2020-10-16 13:57:08,606 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:08,683 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:08,965 INFO L258 McrAutomatonBuilder]: Finished intersection with 133 states and 155 transitions. [2020-10-16 13:57:08,965 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:09,102 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27033#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:09,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 13:57:09,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:09,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 13:57:09,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-16 13:57:09,104 INFO L87 Difference]: Start difference. First operand 1156 states and 1534 transitions. Second operand 11 states. [2020-10-16 13:57:09,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:09,160 INFO L93 Difference]: Finished difference Result 1331 states and 1740 transitions. [2020-10-16 13:57:09,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 13:57:09,160 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 109 [2020-10-16 13:57:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:09,166 INFO L225 Difference]: With dead ends: 1331 [2020-10-16 13:57:09,166 INFO L226 Difference]: Without dead ends: 1331 [2020-10-16 13:57:09,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 125 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-16 13:57:09,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2020-10-16 13:57:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1285. [2020-10-16 13:57:09,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2020-10-16 13:57:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1690 transitions. [2020-10-16 13:57:09,195 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1690 transitions. Word has length 109 [2020-10-16 13:57:09,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:09,195 INFO L481 AbstractCegarLoop]: Abstraction has 1285 states and 1690 transitions. [2020-10-16 13:57:09,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 13:57:09,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1690 transitions. [2020-10-16 13:57:09,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-16 13:57:09,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:09,199 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:09,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 13:57:09,411 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:09,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:09,412 INFO L82 PathProgramCache]: Analyzing trace with hash -220912129, now seen corresponding path program 17 times [2020-10-16 13:57:09,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:09,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325105519] [2020-10-16 13:57:09,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:09,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325105519] [2020-10-16 13:57:09,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659482784] [2020-10-16 13:57:09,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:10,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-16 13:57:10,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:10,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 13:57:10,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:10,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:10,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 13:57:10,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1122604768] [2020-10-16 13:57:10,072 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:10,118 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:10,418 INFO L258 McrAutomatonBuilder]: Finished intersection with 139 states and 164 transitions. [2020-10-16 13:57:10,418 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:10,591 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31280#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:10,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 13:57:10,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:10,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 13:57:10,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-10-16 13:57:10,593 INFO L87 Difference]: Start difference. First operand 1285 states and 1690 transitions. Second operand 12 states. [2020-10-16 13:57:10,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:10,671 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2020-10-16 13:57:10,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 13:57:10,672 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 112 [2020-10-16 13:57:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:10,681 INFO L225 Difference]: With dead ends: 1460 [2020-10-16 13:57:10,681 INFO L226 Difference]: Without dead ends: 1460 [2020-10-16 13:57:10,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-10-16 13:57:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-10-16 13:57:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2020-10-16 13:57:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2020-10-16 13:57:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2020-10-16 13:57:10,718 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 112 [2020-10-16 13:57:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:10,718 INFO L481 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2020-10-16 13:57:10,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 13:57:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2020-10-16 13:57:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-16 13:57:10,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:10,724 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:10,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:10,938 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:10,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:10,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2018487717, now seen corresponding path program 18 times [2020-10-16 13:57:10,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:10,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391055948] [2020-10-16 13:57:10,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:11,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391055948] [2020-10-16 13:57:11,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173302767] [2020-10-16 13:57:11,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:11,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-16 13:57:11,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:11,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 13:57:11,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:11,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:11,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 13:57:11,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1563206336] [2020-10-16 13:57:11,824 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:11,872 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:12,180 INFO L258 McrAutomatonBuilder]: Finished intersection with 145 states and 173 transitions. [2020-10-16 13:57:12,180 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:12,352 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35924#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:12,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 13:57:12,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:12,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 13:57:12,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-16 13:57:12,354 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 13 states. [2020-10-16 13:57:12,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:12,471 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2020-10-16 13:57:12,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 13:57:12,471 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2020-10-16 13:57:12,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:12,480 INFO L225 Difference]: With dead ends: 1589 [2020-10-16 13:57:12,480 INFO L226 Difference]: Without dead ends: 1589 [2020-10-16 13:57:12,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 135 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-16 13:57:12,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2020-10-16 13:57:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2020-10-16 13:57:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-10-16 13:57:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2020-10-16 13:57:12,515 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2020-10-16 13:57:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:12,515 INFO L481 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2020-10-16 13:57:12,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 13:57:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2020-10-16 13:57:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-16 13:57:12,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:12,520 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:12,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:12,734 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:12,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:12,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2042676161, now seen corresponding path program 19 times [2020-10-16 13:57:12,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:12,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7694626] [2020-10-16 13:57:12,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:12,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7694626] [2020-10-16 13:57:12,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736654792] [2020-10-16 13:57:12,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:13,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 13:57:13,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:13,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:13,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 13:57:13,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [981474757] [2020-10-16 13:57:13,107 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:13,155 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:13,529 INFO L258 McrAutomatonBuilder]: Finished intersection with 151 states and 182 transitions. [2020-10-16 13:57:13,530 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:13,763 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [40965#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:13,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 13:57:13,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:13,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 13:57:13,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-10-16 13:57:13,764 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 14 states. [2020-10-16 13:57:13,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:13,873 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2020-10-16 13:57:13,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 13:57:13,874 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 118 [2020-10-16 13:57:13,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:13,884 INFO L225 Difference]: With dead ends: 1718 [2020-10-16 13:57:13,884 INFO L226 Difference]: Without dead ends: 1718 [2020-10-16 13:57:13,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 140 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-10-16 13:57:13,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-10-16 13:57:13,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2020-10-16 13:57:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-10-16 13:57:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2020-10-16 13:57:13,928 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2020-10-16 13:57:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:13,931 INFO L481 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2020-10-16 13:57:13,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 13:57:13,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2020-10-16 13:57:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-16 13:57:13,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:13,938 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:14,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 13:57:14,154 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:14,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:14,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962661, now seen corresponding path program 20 times [2020-10-16 13:57:14,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:14,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213774101] [2020-10-16 13:57:14,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:14,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213774101] [2020-10-16 13:57:14,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062890365] [2020-10-16 13:57:14,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:14,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 13:57:14,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 13:57:14,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:14,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:14,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 13:57:14,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1664082086] [2020-10-16 13:57:14,600 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:14,645 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:15,067 INFO L258 McrAutomatonBuilder]: Finished intersection with 157 states and 191 transitions. [2020-10-16 13:57:15,067 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:15,260 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [46403#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:15,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 13:57:15,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:15,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 13:57:15,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2020-10-16 13:57:15,262 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 15 states. [2020-10-16 13:57:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:15,368 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2020-10-16 13:57:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 13:57:15,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-10-16 13:57:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:15,376 INFO L225 Difference]: With dead ends: 1847 [2020-10-16 13:57:15,376 INFO L226 Difference]: Without dead ends: 1847 [2020-10-16 13:57:15,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 145 SyntacticMatches, 10 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2020-10-16 13:57:15,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2020-10-16 13:57:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2020-10-16 13:57:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2020-10-16 13:57:15,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2020-10-16 13:57:15,407 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2020-10-16 13:57:15,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:15,407 INFO L481 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2020-10-16 13:57:15,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 13:57:15,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2020-10-16 13:57:15,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-16 13:57:15,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:15,413 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:15,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:15,627 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:15,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:15,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1691329151, now seen corresponding path program 21 times [2020-10-16 13:57:15,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:15,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305987066] [2020-10-16 13:57:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:15,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305987066] [2020-10-16 13:57:15,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668733953] [2020-10-16 13:57:15,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:16,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-16 13:57:16,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:16,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 13:57:16,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:16,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:16,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 13:57:16,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [525523876] [2020-10-16 13:57:16,268 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:16,337 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:16,775 INFO L258 McrAutomatonBuilder]: Finished intersection with 163 states and 200 transitions. [2020-10-16 13:57:16,776 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:17,018 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [52238#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:17,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 13:57:17,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:17,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 13:57:17,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2020-10-16 13:57:17,019 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 16 states. [2020-10-16 13:57:17,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:17,125 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2020-10-16 13:57:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 13:57:17,125 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 124 [2020-10-16 13:57:17,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:17,133 INFO L225 Difference]: With dead ends: 1976 [2020-10-16 13:57:17,134 INFO L226 Difference]: Without dead ends: 1976 [2020-10-16 13:57:17,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 150 SyntacticMatches, 11 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2020-10-16 13:57:17,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-10-16 13:57:17,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2020-10-16 13:57:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-10-16 13:57:17,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2020-10-16 13:57:17,185 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2020-10-16 13:57:17,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:17,185 INFO L481 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2020-10-16 13:57:17,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 13:57:17,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2020-10-16 13:57:17,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-16 13:57:17,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:17,193 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:17,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 13:57:17,407 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:17,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:17,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1152246053, now seen corresponding path program 22 times [2020-10-16 13:57:17,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:17,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917157427] [2020-10-16 13:57:17,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:17,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917157427] [2020-10-16 13:57:17,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357455673] [2020-10-16 13:57:17,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:18,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 13:57:18,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:18,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 13:57:18,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:18,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:18,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 13:57:18,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1965814875] [2020-10-16 13:57:18,642 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:18,703 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:19,238 INFO L258 McrAutomatonBuilder]: Finished intersection with 169 states and 209 transitions. [2020-10-16 13:57:19,239 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:19,512 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [58470#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:19,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 13:57:19,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:19,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 13:57:19,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2020-10-16 13:57:19,514 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 17 states. [2020-10-16 13:57:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:19,639 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2020-10-16 13:57:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 13:57:19,640 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2020-10-16 13:57:19,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:19,649 INFO L225 Difference]: With dead ends: 2105 [2020-10-16 13:57:19,649 INFO L226 Difference]: Without dead ends: 2105 [2020-10-16 13:57:19,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 155 SyntacticMatches, 12 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2020-10-16 13:57:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2020-10-16 13:57:19,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2020-10-16 13:57:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2020-10-16 13:57:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2020-10-16 13:57:19,683 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2020-10-16 13:57:19,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:19,684 INFO L481 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2020-10-16 13:57:19,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 13:57:19,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2020-10-16 13:57:19,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-16 13:57:19,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:19,690 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:19,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 13:57:19,906 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:19,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:19,906 INFO L82 PathProgramCache]: Analyzing trace with hash 210393279, now seen corresponding path program 23 times [2020-10-16 13:57:19,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:19,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083485123] [2020-10-16 13:57:19,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:20,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083485123] [2020-10-16 13:57:20,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014031697] [2020-10-16 13:57:20,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:20,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-16 13:57:20,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:20,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 13:57:20,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:20,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:20,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 13:57:20,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1681752579] [2020-10-16 13:57:20,449 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:20,498 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:20,943 INFO L258 McrAutomatonBuilder]: Finished intersection with 175 states and 218 transitions. [2020-10-16 13:57:20,944 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:21,246 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [65099#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:21,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 13:57:21,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:21,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 13:57:21,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2020-10-16 13:57:21,248 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 18 states. [2020-10-16 13:57:21,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:21,345 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2020-10-16 13:57:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 13:57:21,346 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 130 [2020-10-16 13:57:21,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:21,353 INFO L225 Difference]: With dead ends: 2234 [2020-10-16 13:57:21,353 INFO L226 Difference]: Without dead ends: 2234 [2020-10-16 13:57:21,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 160 SyntacticMatches, 13 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2020-10-16 13:57:21,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-10-16 13:57:21,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2020-10-16 13:57:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2020-10-16 13:57:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2020-10-16 13:57:21,384 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2020-10-16 13:57:21,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:21,385 INFO L481 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2020-10-16 13:57:21,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 13:57:21,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2020-10-16 13:57:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-16 13:57:21,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:21,390 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:21,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:21,606 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:21,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:21,606 INFO L82 PathProgramCache]: Analyzing trace with hash 495747813, now seen corresponding path program 24 times [2020-10-16 13:57:21,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:21,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497263913] [2020-10-16 13:57:21,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:21,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497263913] [2020-10-16 13:57:21,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452785586] [2020-10-16 13:57:21,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:22,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-16 13:57:22,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:22,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 13:57:22,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:22,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:22,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 13:57:22,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [711791373] [2020-10-16 13:57:22,396 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:22,431 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:22,897 INFO L258 McrAutomatonBuilder]: Finished intersection with 181 states and 227 transitions. [2020-10-16 13:57:22,897 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:23,187 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [72125#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:23,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 13:57:23,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:23,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 13:57:23,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2020-10-16 13:57:23,189 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 19 states. [2020-10-16 13:57:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:23,292 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2020-10-16 13:57:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 13:57:23,293 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-10-16 13:57:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:23,302 INFO L225 Difference]: With dead ends: 2363 [2020-10-16 13:57:23,302 INFO L226 Difference]: Without dead ends: 2363 [2020-10-16 13:57:23,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 165 SyntacticMatches, 14 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2020-10-16 13:57:23,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-10-16 13:57:23,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2020-10-16 13:57:23,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-10-16 13:57:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2020-10-16 13:57:23,335 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2020-10-16 13:57:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:23,336 INFO L481 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2020-10-16 13:57:23,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 13:57:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2020-10-16 13:57:23,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-16 13:57:23,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:23,341 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:23,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 13:57:23,555 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:23,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:23,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1752391423, now seen corresponding path program 25 times [2020-10-16 13:57:23,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:23,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139226751] [2020-10-16 13:57:23,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:23,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139226751] [2020-10-16 13:57:23,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689437089] [2020-10-16 13:57:23,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:23,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 13:57:23,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:24,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:24,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 13:57:24,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1068880139] [2020-10-16 13:57:24,002 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:24,056 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:24,553 INFO L258 McrAutomatonBuilder]: Finished intersection with 187 states and 236 transitions. [2020-10-16 13:57:24,553 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:24,891 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [79548#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:24,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 13:57:24,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:24,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 13:57:24,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2020-10-16 13:57:24,892 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 20 states. [2020-10-16 13:57:25,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:25,018 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2020-10-16 13:57:25,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 13:57:25,019 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-10-16 13:57:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:25,052 INFO L225 Difference]: With dead ends: 2492 [2020-10-16 13:57:25,052 INFO L226 Difference]: Without dead ends: 2492 [2020-10-16 13:57:25,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 170 SyntacticMatches, 15 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2020-10-16 13:57:25,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2020-10-16 13:57:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2020-10-16 13:57:25,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-10-16 13:57:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2020-10-16 13:57:25,107 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2020-10-16 13:57:25,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:25,108 INFO L481 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2020-10-16 13:57:25,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 13:57:25,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2020-10-16 13:57:25,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-16 13:57:25,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:25,116 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:25,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:25,332 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:25,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:25,332 INFO L82 PathProgramCache]: Analyzing trace with hash -807742299, now seen corresponding path program 26 times [2020-10-16 13:57:25,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:25,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280285362] [2020-10-16 13:57:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:25,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280285362] [2020-10-16 13:57:25,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255994510] [2020-10-16 13:57:25,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:25,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 13:57:25,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:25,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 13:57:25,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:25,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:25,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 13:57:25,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [754924701] [2020-10-16 13:57:25,930 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:25,989 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:26,681 INFO L258 McrAutomatonBuilder]: Finished intersection with 193 states and 245 transitions. [2020-10-16 13:57:26,681 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:27,061 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [87368#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:27,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 13:57:27,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:27,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 13:57:27,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2020-10-16 13:57:27,062 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 21 states. [2020-10-16 13:57:27,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:27,165 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2020-10-16 13:57:27,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 13:57:27,166 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2020-10-16 13:57:27,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:27,171 INFO L225 Difference]: With dead ends: 2621 [2020-10-16 13:57:27,172 INFO L226 Difference]: Without dead ends: 2621 [2020-10-16 13:57:27,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 175 SyntacticMatches, 16 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2020-10-16 13:57:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2020-10-16 13:57:27,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2020-10-16 13:57:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2020-10-16 13:57:27,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2020-10-16 13:57:27,208 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2020-10-16 13:57:27,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:27,208 INFO L481 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2020-10-16 13:57:27,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 13:57:27,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2020-10-16 13:57:27,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-16 13:57:27,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:27,214 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:27,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 13:57:27,428 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:27,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:27,428 INFO L82 PathProgramCache]: Analyzing trace with hash 277787967, now seen corresponding path program 27 times [2020-10-16 13:57:27,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:27,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580654565] [2020-10-16 13:57:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:27,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580654565] [2020-10-16 13:57:27,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051970979] [2020-10-16 13:57:27,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:28,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-10-16 13:57:28,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:28,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 13:57:28,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:28,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:28,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 13:57:28,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [623553446] [2020-10-16 13:57:28,218 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:28,280 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:28,905 INFO L258 McrAutomatonBuilder]: Finished intersection with 199 states and 254 transitions. [2020-10-16 13:57:28,905 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:29,346 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [95585#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:29,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 13:57:29,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:29,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 13:57:29,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2020-10-16 13:57:29,348 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 22 states. [2020-10-16 13:57:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:29,491 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2020-10-16 13:57:29,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 13:57:29,491 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2020-10-16 13:57:29,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:29,497 INFO L225 Difference]: With dead ends: 2750 [2020-10-16 13:57:29,497 INFO L226 Difference]: Without dead ends: 2750 [2020-10-16 13:57:29,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 180 SyntacticMatches, 17 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2020-10-16 13:57:29,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-10-16 13:57:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2020-10-16 13:57:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-10-16 13:57:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2020-10-16 13:57:29,546 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2020-10-16 13:57:29,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:29,547 INFO L481 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2020-10-16 13:57:29,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 13:57:29,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2020-10-16 13:57:29,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-16 13:57:29,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:29,558 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:29,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 13:57:29,773 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:29,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:29,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1793796507, now seen corresponding path program 28 times [2020-10-16 13:57:29,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:29,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205815254] [2020-10-16 13:57:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:30,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205815254] [2020-10-16 13:57:30,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088125663] [2020-10-16 13:57:30,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:32,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 13:57:32,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:32,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 13:57:32,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-16 13:57:32,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:32,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 13:57:32,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [198496954] [2020-10-16 13:57:32,285 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:32,326 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:33,017 INFO L258 McrAutomatonBuilder]: Finished intersection with 205 states and 263 transitions. [2020-10-16 13:57:33,017 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:33,442 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [104199#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-16 13:57:33,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 13:57:33,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:33,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 13:57:33,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-10-16 13:57:33,443 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 23 states. [2020-10-16 13:57:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:57:33,581 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2020-10-16 13:57:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 13:57:33,582 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 145 [2020-10-16 13:57:33,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:57:33,587 INFO L225 Difference]: With dead ends: 2833 [2020-10-16 13:57:33,587 INFO L226 Difference]: Without dead ends: 2833 [2020-10-16 13:57:33,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 185 SyntacticMatches, 18 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-10-16 13:57:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2020-10-16 13:57:33,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2020-10-16 13:57:33,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-10-16 13:57:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2020-10-16 13:57:33,624 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2020-10-16 13:57:33,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:57:33,624 INFO L481 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2020-10-16 13:57:33,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 13:57:33,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2020-10-16 13:57:33,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-16 13:57:33,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:57:33,630 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:57:33,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:33,845 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:57:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:57:33,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1981785217, now seen corresponding path program 29 times [2020-10-16 13:57:33,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:57:33,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977156250] [2020-10-16 13:57:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:57:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:57:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 13:57:36,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977156250] [2020-10-16 13:57:36,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399820399] [2020-10-16 13:57:36,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:57:37,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-16 13:57:37,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:57:37,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-16 13:57:37,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:57:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 13:57:37,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:57:37,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-16 13:57:37,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [568843268] [2020-10-16 13:57:37,219 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:57:37,261 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:57:37,904 INFO L258 McrAutomatonBuilder]: Finished intersection with 211 states and 272 transitions. [2020-10-16 13:57:37,904 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:57:38,158 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 13:57:38,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-16 13:57:38,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:57:38,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-16 13:57:38,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 13:57:38,161 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2020-10-16 13:58:58,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 13:58:58,508 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2020-10-16 13:58:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2020-10-16 13:58:58,509 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-16 13:58:58,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 13:58:58,569 INFO L225 Difference]: With dead ends: 32926 [2020-10-16 13:58:58,570 INFO L226 Difference]: Without dead ends: 32924 [2020-10-16 13:58:58,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 841 GetRequests, 205 SyntacticMatches, 4 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2020-10-16 13:58:58,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2020-10-16 13:58:58,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2020-10-16 13:58:58,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-10-16 13:58:58,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2020-10-16 13:58:58,999 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2020-10-16 13:58:58,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 13:58:58,999 INFO L481 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2020-10-16 13:58:58,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-16 13:58:59,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2020-10-16 13:58:59,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-16 13:58:59,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 13:58:59,006 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 13:58:59,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:58:59,220 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 13:58:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 13:58:59,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1970430061, now seen corresponding path program 30 times [2020-10-16 13:58:59,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 13:58:59,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743291851] [2020-10-16 13:58:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 13:58:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 13:59:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 13:59:02,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743291851] [2020-10-16 13:59:02,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815298577] [2020-10-16 13:59:02,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 13:59:02,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-16 13:59:02,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 13:59:02,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-16 13:59:02,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 13:59:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 13:59:03,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 13:59:03,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-16 13:59:03,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1638264091] [2020-10-16 13:59:03,054 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 13:59:03,098 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 13:59:03,594 INFO L258 McrAutomatonBuilder]: Finished intersection with 208 states and 266 transitions. [2020-10-16 13:59:03,594 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 13:59:03,820 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 13:59:03,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-16 13:59:03,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 13:59:03,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-16 13:59:03,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 13:59:03,822 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. [2020-10-16 14:00:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:26,039 INFO L93 Difference]: Finished difference Result 30945 states and 43173 transitions. [2020-10-16 14:00:26,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-16 14:00:26,040 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-16 14:00:26,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:26,079 INFO L225 Difference]: With dead ends: 30945 [2020-10-16 14:00:26,079 INFO L226 Difference]: Without dead ends: 30943 [2020-10-16 14:00:26,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 202 SyntacticMatches, 4 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-16 14:00:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30943 states. [2020-10-16 14:00:26,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30943 to 2973. [2020-10-16 14:00:26,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2020-10-16 14:00:26,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3801 transitions. [2020-10-16 14:00:26,511 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3801 transitions. Word has length 148 [2020-10-16 14:00:26,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:26,512 INFO L481 AbstractCegarLoop]: Abstraction has 2973 states and 3801 transitions. [2020-10-16 14:00:26,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-16 14:00:26,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3801 transitions. [2020-10-16 14:00:26,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-16 14:00:26,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:26,517 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 14:00:26,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 14:00:26,731 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 14:00:26,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:26,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1092472257, now seen corresponding path program 31 times [2020-10-16 14:00:26,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:26,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005370508] [2020-10-16 14:00:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 14:00:30,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005370508] [2020-10-16 14:00:30,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122189514] [2020-10-16 14:00:30,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 14:00:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:30,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-16 14:00:30,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 14:00:30,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:30,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-16 14:00:30,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1845304052] [2020-10-16 14:00:30,306 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:30,350 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:30,812 INFO L258 McrAutomatonBuilder]: Finished intersection with 205 states and 260 transitions. [2020-10-16 14:00:30,812 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:31,062 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:31,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-16 14:00:31,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:31,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-16 14:00:31,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 14:00:31,064 INFO L87 Difference]: Start difference. First operand 2973 states and 3801 transitions. Second operand 63 states. Received shutdown request... [2020-10-16 14:00:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-16 14:00:42,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 14:00:42,004 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 14:00:42,008 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 14:00:42,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:00:42 BasicIcfg [2020-10-16 14:00:42,008 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 14:00:42,010 INFO L168 Benchmark]: Toolchain (without parser) took 233171.70 ms. Allocated memory was 139.5 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 100.2 MB in the beginning and 1.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2020-10-16 14:00:42,010 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-16 14:00:42,010 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1191.17 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 99.7 MB in the beginning and 108.5 MB in the end (delta: -8.7 MB). Peak memory consumption was 61.0 MB. Max. memory is 7.1 GB. [2020-10-16 14:00:42,011 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.41 ms. Allocated memory is still 203.9 MB. Free memory was 108.5 MB in the beginning and 105.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-10-16 14:00:42,011 INFO L168 Benchmark]: Boogie Preprocessor took 34.00 ms. Allocated memory is still 203.9 MB. Free memory was 105.5 MB in the beginning and 104.5 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 7.1 GB. [2020-10-16 14:00:42,011 INFO L168 Benchmark]: RCFGBuilder took 538.99 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 104.5 MB in the beginning and 197.1 MB in the end (delta: -92.5 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-10-16 14:00:42,012 INFO L168 Benchmark]: TraceAbstraction took 231330.17 ms. Allocated memory was 236.5 MB in the beginning and 2.6 GB in the end (delta: 2.3 GB). Free memory was 195.3 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2020-10-16 14:00:42,014 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1191.17 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 99.7 MB in the beginning and 108.5 MB in the end (delta: -8.7 MB). Peak memory consumption was 61.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 69.41 ms. Allocated memory is still 203.9 MB. Free memory was 108.5 MB in the beginning and 105.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.00 ms. Allocated memory is still 203.9 MB. Free memory was 105.5 MB in the beginning and 104.5 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 7.1 GB. * RCFGBuilder took 538.99 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 104.5 MB in the beginning and 197.1 MB in the end (delta: -92.5 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 231330.17 ms. Allocated memory was 236.5 MB in the beginning and 2.6 GB in the end (delta: 2.3 GB). Free memory was 195.3 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 325 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.1s, 78 PlacesBefore, 19 PlacesAfterwards, 81 TransitionsBefore, 17 TransitionsAfterwards, 646 CoEnabledTransitionPairs, 5 FixpointIterations, 38 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 75 TotalNumberOfCompositions, 823 MoverChecksTotal - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (2973states) and FLOYD_HOARE automaton (currently 89 states, 63 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 136 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 231.2s, OverallIterations: 33, TraceHistogramMax: 20, AutomataDifference: 176.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 5379 SDtfs, 8224 SDslu, 284759 SDs, 0 SdLazy, 162996 SolverSat, 1458 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 78.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5662 GetRequests, 3720 SyntacticMatches, 187 SemanticMatches, 1754 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318973 ImplicationChecksByTransitivity, 78.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2973occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 32 MinimizatonAttempts, 58673 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 8.8s SatisfiabilityAnalysisTime, 15.3s InterpolantComputationTime, 6116 NumberOfCodeBlocks, 5794 NumberOfCodeBlocksAsserted, 286 NumberOfCheckSat, 6053 ConstructedInterpolants, 0 QuantifiedInterpolants, 2521791 SizeOfPredicates, 147 NumberOfNonLiveVariables, 10912 ConjunctsInSsa, 807 ConjunctsInUnsatCore, 63 InterpolantComputations, 3 PerfectInterpolantSequences, 27231/46582 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