/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/concurrent/pthreads/distributed_search2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 11:32:15,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 11:32:15,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 11:32:15,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 11:32:15,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 11:32:15,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 11:32:15,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 11:32:15,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 11:32:15,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 11:32:15,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 11:32:15,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 11:32:15,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 11:32:15,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 11:32:15,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 11:32:15,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 11:32:15,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 11:32:15,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 11:32:15,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 11:32:15,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 11:32:15,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 11:32:15,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 11:32:15,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 11:32:15,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 11:32:15,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 11:32:15,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 11:32:15,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 11:32:15,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 11:32:15,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 11:32:15,424 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-16 11:32:15,451 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 11:32:15,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 11:32:15,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 11:32:15,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 11:32:15,453 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 11:32:15,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 11:32:15,453 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 11:32:15,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 11:32:15,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 11:32:15,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 11:32:15,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 11:32:15,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 11:32:15,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 11:32:15,457 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 11:32:15,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 11:32:15,457 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 11:32:15,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 11:32:15,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 11:32:15,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 11:32:15,458 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 11:32:15,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 11:32:15,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:32:15,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 11:32:15,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 11:32:15,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 11:32:15,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 11:32:15,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 11:32:15,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 11:32:15,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-16 11:32:15,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 11:32:15,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 11:32:15,812 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 11:32:15,815 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 11:32:15,817 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 11:32:15,817 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 11:32:15,818 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/distributed_search2.c [2020-10-16 11:32:15,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2473e969/5b24fc96c3e9471c9a3d4cdcab22325c/FLAG8990aa46b [2020-10-16 11:32:16,400 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 11:32:16,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/concurrent/pthreads/distributed_search2.c [2020-10-16 11:32:16,401 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-16 11:32:16,401 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-16 11:32:16,438 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2473e969/5b24fc96c3e9471c9a3d4cdcab22325c/FLAG8990aa46b [2020-10-16 11:32:16,730 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2473e969/5b24fc96c3e9471c9a3d4cdcab22325c [2020-10-16 11:32:16,744 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 11:32:16,746 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 11:32:16,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 11:32:16,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 11:32:16,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 11:32:16,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:32:16" (1/1) ... [2020-10-16 11:32:16,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c9b3d8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:32:16, skipping insertion in model container [2020-10-16 11:32:16,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:32:16" (1/1) ... [2020-10-16 11:32:16,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 11:32:16,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 11:32:17,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:32:17,082 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 11:32:17,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:32:17,122 INFO L208 MainTranslator]: Completed translation [2020-10-16 11:32:17,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:32:17 WrapperNode [2020-10-16 11:32:17,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 11:32:17,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 11:32:17,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 11:32:17,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 11:32:17,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:32:17" (1/1) ... [2020-10-16 11:32:17,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:32:17" (1/1) ... [2020-10-16 11:32:17,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 11:32:17,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 11:32:17,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 11:32:17,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 11:32:17,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:32:17" (1/1) ... [2020-10-16 11:32:17,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:32:17" (1/1) ... [2020-10-16 11:32:17,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:32:17" (1/1) ... [2020-10-16 11:32:17,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:32:17" (1/1) ... [2020-10-16 11:32:17,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:32:17" (1/1) ... [2020-10-16 11:32:17,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:32:17" (1/1) ... [2020-10-16 11:32:17,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:32:17" (1/1) ... [2020-10-16 11:32:17,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 11:32:17,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 11:32:17,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 11:32:17,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 11:32:17,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:32:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:32:17,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 11:32:17,262 INFO L130 BoogieDeclarations]: Found specification of procedure search_worker [2020-10-16 11:32:17,262 INFO L138 BoogieDeclarations]: Found implementation of procedure search_worker [2020-10-16 11:32:17,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 11:32:17,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 11:32:17,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-16 11:32:17,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 11:32:17,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 11:32:17,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 11:32:17,265 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 11:32:17,732 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 11:32:17,733 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-16 11:32:17,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:32:17 BoogieIcfgContainer [2020-10-16 11:32:17,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 11:32:17,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 11:32:17,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 11:32:17,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 11:32:17,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 11:32:16" (1/3) ... [2020-10-16 11:32:17,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c1dd63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:32:17, skipping insertion in model container [2020-10-16 11:32:17,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:32:17" (2/3) ... [2020-10-16 11:32:17,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c1dd63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:32:17, skipping insertion in model container [2020-10-16 11:32:17,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:32:17" (3/3) ... [2020-10-16 11:32:17,746 INFO L111 eAbstractionObserver]: Analyzing ICFG distributed_search2.c [2020-10-16 11:32:17,759 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 11:32:17,759 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 11:32:17,768 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 11:32:17,769 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 11:32:17,804 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#in~params.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,805 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#in~params.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,805 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~params.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,806 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~params.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,806 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~params.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,806 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~params.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,807 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~bounds~0.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,807 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~bounds~0.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,807 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~bounds~0.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,807 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~bounds~0.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,808 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~mem0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,808 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~mem0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,808 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~lower~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,808 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~mem0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,809 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~bounds~0.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,809 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~bounds~0.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,809 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,810 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,810 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~upper~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,810 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,810 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~lower~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,811 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,811 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~upper~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,811 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,812 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~upper~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,812 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,812 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,813 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,813 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,813 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,813 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,814 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,814 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,814 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,815 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,815 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,815 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,815 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,816 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,816 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,817 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#in~params.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,817 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#in~params.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,817 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~params.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,817 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~params.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,817 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~params.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,818 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~params.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,818 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~bounds~0.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,818 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~bounds~0.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,818 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~bounds~0.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,819 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~bounds~0.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,819 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~mem0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,819 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~mem0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,819 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~lower~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,820 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~mem0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,820 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~bounds~0.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,820 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~bounds~0.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,820 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,821 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,821 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~upper~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,821 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,821 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~lower~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,822 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,822 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~upper~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,822 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,823 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~upper~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,823 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,823 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,823 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,824 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,824 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,824 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,824 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,825 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,828 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,828 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,829 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,829 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,829 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,829 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,829 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,839 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,839 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~params.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,839 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,840 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,840 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,840 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~bounds~0.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,840 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,841 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~params.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,841 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~bounds~0.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,841 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,842 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~lower~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,842 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork0_#t~mem0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,842 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork0_~upper~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,849 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,849 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,850 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~params.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,850 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~mem0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,850 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,851 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,851 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~bounds~0.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,851 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,851 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~params.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,851 WARN L313 ript$VariableManager]: TermVariabe |search_workerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,852 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~bounds~0.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,852 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~lower~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,852 WARN L313 ript$VariableManager]: TermVariabe search_workerThread1of1ForFork1_~upper~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:32:17,863 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2020-10-16 11:32:17,878 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 11:32:17,899 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:32:17,899 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:32:17,900 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 11:32:17,900 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:32:17,900 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:32:17,900 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:32:17,900 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:32:17,901 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:32:17,919 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 11:32:17,922 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 138 transitions, 298 flow [2020-10-16 11:32:17,925 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 138 transitions, 298 flow [2020-10-16 11:32:17,927 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 135 places, 138 transitions, 298 flow [2020-10-16 11:32:18,016 INFO L129 PetriNetUnfolder]: 9/138 cut-off events. [2020-10-16 11:32:18,016 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-16 11:32:18,023 INFO L80 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 138 events. 9/138 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 159 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 71. Up to 3 conditions per place. [2020-10-16 11:32:18,028 INFO L117 LiptonReduction]: Number of co-enabled transitions 1920 [2020-10-16 11:32:20,260 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-16 11:32:20,365 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-16 11:32:20,802 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-16 11:32:21,157 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-16 11:32:21,167 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 11, 1] term [2020-10-16 11:32:21,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:32:21,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:32:21,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:32:21,752 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 119 [2020-10-16 11:32:21,943 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-16 11:32:22,182 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-16 11:32:22,430 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-16 11:32:22,437 INFO L132 LiptonReduction]: Checked pairs total: 4040 [2020-10-16 11:32:22,438 INFO L134 LiptonReduction]: Total number of compositions: 125 [2020-10-16 11:32:22,445 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 30 transitions, 82 flow [2020-10-16 11:32:22,460 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 126 states. [2020-10-16 11:32:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states. [2020-10-16 11:32:22,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:32:22,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:22,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:22,475 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:22,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:22,481 INFO L82 PathProgramCache]: Analyzing trace with hash -878946956, now seen corresponding path program 1 times [2020-10-16 11:32:22,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:22,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817331244] [2020-10-16 11:32:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:22,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817331244] [2020-10-16 11:32:22,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:32:22,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-16 11:32:22,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681611657] [2020-10-16 11:32:22,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:32:22,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:22,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:32:22,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:32:22,766 INFO L87 Difference]: Start difference. First operand 126 states. Second operand 5 states. [2020-10-16 11:32:22,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:22,890 INFO L93 Difference]: Finished difference Result 126 states and 313 transitions. [2020-10-16 11:32:22,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:32:22,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-16 11:32:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:22,908 INFO L225 Difference]: With dead ends: 126 [2020-10-16 11:32:22,909 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 11:32:22,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:32:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 11:32:22,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-16 11:32:22,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-16 11:32:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-16 11:32:22,964 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 16 [2020-10-16 11:32:22,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:22,965 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-16 11:32:22,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:32:22,966 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-16 11:32:22,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:32:22,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:22,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:22,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 11:32:22,969 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:22,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:22,969 INFO L82 PathProgramCache]: Analyzing trace with hash 351436872, now seen corresponding path program 1 times [2020-10-16 11:32:22,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:22,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52851229] [2020-10-16 11:32:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:23,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52851229] [2020-10-16 11:32:23,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:32:23,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 11:32:23,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094998800] [2020-10-16 11:32:23,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 11:32:23,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:23,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 11:32:23,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 11:32:23,137 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 3 states. [2020-10-16 11:32:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:23,202 INFO L93 Difference]: Finished difference Result 170 states and 444 transitions. [2020-10-16 11:32:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 11:32:23,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-16 11:32:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:23,209 INFO L225 Difference]: With dead ends: 170 [2020-10-16 11:32:23,209 INFO L226 Difference]: Without dead ends: 163 [2020-10-16 11:32:23,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 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 11:32:23,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-16 11:32:23,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 140. [2020-10-16 11:32:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:32:23,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 372 transitions. [2020-10-16 11:32:23,229 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 372 transitions. Word has length 16 [2020-10-16 11:32:23,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:23,229 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 372 transitions. [2020-10-16 11:32:23,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 11:32:23,229 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 372 transitions. [2020-10-16 11:32:23,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:32:23,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:23,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:23,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 11:32:23,232 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:23,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:23,232 INFO L82 PathProgramCache]: Analyzing trace with hash 443469900, now seen corresponding path program 1 times [2020-10-16 11:32:23,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:23,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720570517] [2020-10-16 11:32:23,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:23,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720570517] [2020-10-16 11:32:23,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545079456] [2020-10-16 11:32:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:23,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-16 11:32:23,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:23,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:23,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2020-10-16 11:32:23,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353126631] [2020-10-16 11:32:23,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:32:23,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:23,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:32:23,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:32:23,654 INFO L87 Difference]: Start difference. First operand 140 states and 372 transitions. Second operand 8 states. [2020-10-16 11:32:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:23,909 INFO L93 Difference]: Finished difference Result 202 states and 539 transitions. [2020-10-16 11:32:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:32:23,910 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-16 11:32:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:23,913 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:32:23,914 INFO L226 Difference]: Without dead ends: 158 [2020-10-16 11:32:23,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:32:23,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-16 11:32:23,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 110. [2020-10-16 11:32:23,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 11:32:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 290 transitions. [2020-10-16 11:32:23,932 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 290 transitions. Word has length 19 [2020-10-16 11:32:23,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:23,932 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 290 transitions. [2020-10-16 11:32:23,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:32:23,932 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 290 transitions. [2020-10-16 11:32:23,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:32:23,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:23,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:24,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-16 11:32:24,149 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:24,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:24,150 INFO L82 PathProgramCache]: Analyzing trace with hash -799546606, now seen corresponding path program 1 times [2020-10-16 11:32:24,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:24,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096740564] [2020-10-16 11:32:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:24,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096740564] [2020-10-16 11:32:24,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:32:24,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-16 11:32:24,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943600649] [2020-10-16 11:32:24,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:32:24,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:24,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:32:24,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:32:24,798 INFO L87 Difference]: Start difference. First operand 110 states and 290 transitions. Second operand 10 states. [2020-10-16 11:32:25,064 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-16 11:32:25,287 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-16 11:32:25,567 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-10-16 11:32:25,914 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-10-16 11:32:26,318 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 98 [2020-10-16 11:32:26,653 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 103 [2020-10-16 11:32:26,836 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-16 11:32:27,092 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-10-16 11:32:27,468 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 109 [2020-10-16 11:32:27,719 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-10-16 11:32:27,873 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-16 11:32:28,210 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2020-10-16 11:32:28,509 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-16 11:32:28,773 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-16 11:32:29,188 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-16 11:32:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:29,300 INFO L93 Difference]: Finished difference Result 305 states and 837 transitions. [2020-10-16 11:32:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:32:29,300 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-16 11:32:29,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:29,304 INFO L225 Difference]: With dead ends: 305 [2020-10-16 11:32:29,305 INFO L226 Difference]: Without dead ends: 245 [2020-10-16 11:32:29,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=220, Invalid=482, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:32:29,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-16 11:32:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 110. [2020-10-16 11:32:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 11:32:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 288 transitions. [2020-10-16 11:32:29,323 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 288 transitions. Word has length 20 [2020-10-16 11:32:29,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:29,323 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 288 transitions. [2020-10-16 11:32:29,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:32:29,323 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 288 transitions. [2020-10-16 11:32:29,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:32:29,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:29,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:29,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 11:32:29,328 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:29,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:29,328 INFO L82 PathProgramCache]: Analyzing trace with hash -323380434, now seen corresponding path program 2 times [2020-10-16 11:32:29,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:29,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989825961] [2020-10-16 11:32:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:30,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989825961] [2020-10-16 11:32:30,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:32:30,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-16 11:32:30,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966758594] [2020-10-16 11:32:30,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:32:30,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:30,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:32:30,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:32:30,092 INFO L87 Difference]: Start difference. First operand 110 states and 288 transitions. Second operand 10 states. [2020-10-16 11:32:30,332 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-16 11:32:30,568 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-16 11:32:30,843 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-10-16 11:32:31,236 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2020-10-16 11:32:31,684 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 109 [2020-10-16 11:32:32,270 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 115 [2020-10-16 11:32:32,602 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-10-16 11:32:32,818 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-16 11:32:33,101 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2020-10-16 11:32:33,427 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2020-10-16 11:32:33,871 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 108 [2020-10-16 11:32:34,411 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2020-10-16 11:32:34,740 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2020-10-16 11:32:35,089 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-16 11:32:35,222 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-16 11:32:35,465 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-16 11:32:35,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:35,549 INFO L93 Difference]: Finished difference Result 414 states and 1136 transitions. [2020-10-16 11:32:35,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:32:35,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-16 11:32:35,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:35,553 INFO L225 Difference]: With dead ends: 414 [2020-10-16 11:32:35,553 INFO L226 Difference]: Without dead ends: 382 [2020-10-16 11:32:35,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:32:35,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-10-16 11:32:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 116. [2020-10-16 11:32:35,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-16 11:32:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 301 transitions. [2020-10-16 11:32:35,565 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 301 transitions. Word has length 20 [2020-10-16 11:32:35,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:35,565 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 301 transitions. [2020-10-16 11:32:35,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:32:35,566 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 301 transitions. [2020-10-16 11:32:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:32:35,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:35,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:35,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 11:32:35,567 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:35,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:35,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1380507504, now seen corresponding path program 3 times [2020-10-16 11:32:35,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:35,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715801876] [2020-10-16 11:32:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:36,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715801876] [2020-10-16 11:32:36,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:32:36,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-16 11:32:36,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618970849] [2020-10-16 11:32:36,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:32:36,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:36,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:32:36,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:32:36,214 INFO L87 Difference]: Start difference. First operand 116 states and 301 transitions. Second operand 10 states. [2020-10-16 11:32:36,469 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-16 11:32:36,687 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-16 11:32:36,968 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-10-16 11:32:37,361 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2020-10-16 11:32:37,831 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 115 [2020-10-16 11:32:38,518 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 123 [2020-10-16 11:32:38,847 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-10-16 11:32:39,078 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-16 11:32:39,346 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2020-10-16 11:32:39,773 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2020-10-16 11:32:40,288 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 106 [2020-10-16 11:32:40,718 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 113 [2020-10-16 11:32:41,018 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-16 11:32:41,170 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-16 11:32:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:41,238 INFO L93 Difference]: Finished difference Result 320 states and 886 transitions. [2020-10-16 11:32:41,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:32:41,238 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-16 11:32:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:41,242 INFO L225 Difference]: With dead ends: 320 [2020-10-16 11:32:41,242 INFO L226 Difference]: Without dead ends: 318 [2020-10-16 11:32:41,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:32:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-16 11:32:41,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 118. [2020-10-16 11:32:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:32:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 308 transitions. [2020-10-16 11:32:41,251 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 308 transitions. Word has length 20 [2020-10-16 11:32:41,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:41,252 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 308 transitions. [2020-10-16 11:32:41,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:32:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 308 transitions. [2020-10-16 11:32:41,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:32:41,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:41,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:41,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-16 11:32:41,254 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:41,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:41,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1947007856, now seen corresponding path program 4 times [2020-10-16 11:32:41,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:41,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572392123] [2020-10-16 11:32:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:41,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572392123] [2020-10-16 11:32:41,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:32:41,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-16 11:32:41,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215651170] [2020-10-16 11:32:41,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:32:41,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:41,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:32:41,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:32:41,856 INFO L87 Difference]: Start difference. First operand 118 states and 308 transitions. Second operand 10 states. [2020-10-16 11:32:42,095 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-16 11:32:42,332 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-16 11:32:42,633 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-10-16 11:32:42,945 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-16 11:32:43,319 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2020-10-16 11:32:43,625 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2020-10-16 11:32:43,972 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 97 [2020-10-16 11:32:44,447 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 115 [2020-10-16 11:32:44,870 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 103 [2020-10-16 11:32:45,338 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-16 11:32:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:45,473 INFO L93 Difference]: Finished difference Result 278 states and 749 transitions. [2020-10-16 11:32:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:32:45,474 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-16 11:32:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:45,477 INFO L225 Difference]: With dead ends: 278 [2020-10-16 11:32:45,477 INFO L226 Difference]: Without dead ends: 278 [2020-10-16 11:32:45,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:32:45,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-16 11:32:45,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 122. [2020-10-16 11:32:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 11:32:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 324 transitions. [2020-10-16 11:32:45,486 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 324 transitions. Word has length 20 [2020-10-16 11:32:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:45,487 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 324 transitions. [2020-10-16 11:32:45,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:32:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 324 transitions. [2020-10-16 11:32:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:32:45,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:45,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:45,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-16 11:32:45,489 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:45,489 INFO L82 PathProgramCache]: Analyzing trace with hash -598861718, now seen corresponding path program 5 times [2020-10-16 11:32:45,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:45,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115358500] [2020-10-16 11:32:45,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:45,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115358500] [2020-10-16 11:32:45,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010419946] [2020-10-16 11:32:45,777 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:45,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:32:45,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:45,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 67 conjunts are in the unsatisfiable core [2020-10-16 11:32:45,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:45,948 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 11:32:45,949 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 75 [2020-10-16 11:32:45,952 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-10-16 11:32:45,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:32:45,954 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:32:45,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:32:45,962 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-16 11:32:46,070 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-16 11:32:46,071 INFO L625 ElimStorePlain]: treesize reduction 97, result has 37.0 percent of original size [2020-10-16 11:32:46,086 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-10-16 11:32:46,087 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-16 11:32:46,114 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 11:32:46,115 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 11:32:46,116 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:68, output treesize:53 [2020-10-16 11:32:46,272 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2020-10-16 11:32:46,275 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 11:32:46,308 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 11:32:46,313 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-16 11:32:46,313 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:60 [2020-10-16 11:32:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:47,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:47,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2020-10-16 11:32:47,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387822821] [2020-10-16 11:32:47,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:32:47,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:47,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:32:47,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:32:47,051 INFO L87 Difference]: Start difference. First operand 122 states and 324 transitions. Second operand 17 states. [2020-10-16 11:32:47,366 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-16 11:32:47,608 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-16 11:32:47,978 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-16 11:32:48,343 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-16 11:32:48,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:48,711 INFO L93 Difference]: Finished difference Result 243 states and 654 transitions. [2020-10-16 11:32:48,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:32:48,712 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:32:48,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:48,714 INFO L225 Difference]: With dead ends: 243 [2020-10-16 11:32:48,714 INFO L226 Difference]: Without dead ends: 224 [2020-10-16 11:32:48,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:32:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-16 11:32:48,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 176. [2020-10-16 11:32:48,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-16 11:32:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 481 transitions. [2020-10-16 11:32:48,722 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 481 transitions. Word has length 20 [2020-10-16 11:32:48,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:48,722 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 481 transitions. [2020-10-16 11:32:48,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:32:48,723 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 481 transitions. [2020-10-16 11:32:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:32:48,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:48,724 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:48,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:48,925 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:48,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2072690650, now seen corresponding path program 1 times [2020-10-16 11:32:48,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:48,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442234073] [2020-10-16 11:32:48,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:49,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442234073] [2020-10-16 11:32:49,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934245923] [2020-10-16 11:32:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:49,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-16 11:32:49,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:32:49,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:49,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3] total 11 [2020-10-16 11:32:49,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665626512] [2020-10-16 11:32:49,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:32:49,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:49,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:32:49,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:32:49,410 INFO L87 Difference]: Start difference. First operand 176 states and 481 transitions. Second operand 13 states. [2020-10-16 11:32:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:50,596 INFO L93 Difference]: Finished difference Result 491 states and 1335 transitions. [2020-10-16 11:32:50,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:32:50,597 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-16 11:32:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:50,598 INFO L225 Difference]: With dead ends: 491 [2020-10-16 11:32:50,598 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:32:50,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:32:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:32:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 70. [2020-10-16 11:32:50,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:32:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 149 transitions. [2020-10-16 11:32:50,603 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 149 transitions. Word has length 22 [2020-10-16 11:32:50,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:50,603 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 149 transitions. [2020-10-16 11:32:50,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:32:50,603 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 149 transitions. [2020-10-16 11:32:50,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:32:50,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:50,604 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:50,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:50,805 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:50,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1587846356, now seen corresponding path program 2 times [2020-10-16 11:32:50,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:50,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554571101] [2020-10-16 11:32:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:51,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554571101] [2020-10-16 11:32:51,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524326394] [2020-10-16 11:32:51,070 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:51,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:32:51,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:51,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-16 11:32:51,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:51,154 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2020-10-16 11:32:51,156 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 11:32:51,192 INFO L625 ElimStorePlain]: treesize reduction 31, result has 36.7 percent of original size [2020-10-16 11:32:51,196 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-16 11:32:51,196 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:14 [2020-10-16 11:32:51,266 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-10-16 11:32:51,267 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 11:32:51,275 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 11:32:51,277 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-16 11:32:51,277 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:23 [2020-10-16 11:32:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:32:51,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:51,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 12 [2020-10-16 11:32:51,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825416537] [2020-10-16 11:32:51,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:32:51,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:51,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:32:51,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:32:51,395 INFO L87 Difference]: Start difference. First operand 70 states and 149 transitions. Second operand 14 states. [2020-10-16 11:32:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:52,704 INFO L93 Difference]: Finished difference Result 187 states and 417 transitions. [2020-10-16 11:32:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:32:52,706 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-16 11:32:52,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:52,707 INFO L225 Difference]: With dead ends: 187 [2020-10-16 11:32:52,707 INFO L226 Difference]: Without dead ends: 56 [2020-10-16 11:32:52,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:32:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-16 11:32:52,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-10-16 11:32:52,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:32:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 98 transitions. [2020-10-16 11:32:52,711 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 98 transitions. Word has length 22 [2020-10-16 11:32:52,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:52,711 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 98 transitions. [2020-10-16 11:32:52,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:32:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 98 transitions. [2020-10-16 11:32:52,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:32:52,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:52,712 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:52,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:52,922 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:52,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:52,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1188207356, now seen corresponding path program 3 times [2020-10-16 11:32:52,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:52,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525793943] [2020-10-16 11:32:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:53,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525793943] [2020-10-16 11:32:53,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595441412] [2020-10-16 11:32:53,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:53,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:32:53,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:53,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-16 11:32:53,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:53,371 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 11:32:53,371 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 72 [2020-10-16 11:32:53,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:32:53,374 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-10-16 11:32:53,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:32:53,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:32:53,379 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 11:32:53,435 INFO L625 ElimStorePlain]: treesize reduction 139, result has 13.7 percent of original size [2020-10-16 11:32:53,437 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-16 11:32:53,437 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2020-10-16 11:32:53,538 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-10-16 11:32:53,539 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 11:32:53,546 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 11:32:53,547 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-16 11:32:53,548 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:23 [2020-10-16 11:32:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 11:32:53,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:53,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 13 [2020-10-16 11:32:53,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645570936] [2020-10-16 11:32:53,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:32:53,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:53,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:32:53,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:32:53,612 INFO L87 Difference]: Start difference. First operand 52 states and 98 transitions. Second operand 15 states. [2020-10-16 11:32:55,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:55,538 INFO L93 Difference]: Finished difference Result 104 states and 197 transitions. [2020-10-16 11:32:55,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:32:55,539 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-16 11:32:55,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:55,539 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:32:55,539 INFO L226 Difference]: Without dead ends: 0 [2020-10-16 11:32:55,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:32:55,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-16 11:32:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-16 11:32:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-16 11:32:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-16 11:32:55,542 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-10-16 11:32:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:55,542 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-16 11:32:55,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:32:55,542 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-16 11:32:55,542 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-16 11:32:55,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-16 11:32:55,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 11:32:55 BasicIcfg [2020-10-16 11:32:55,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 11:32:55,749 INFO L168 Benchmark]: Toolchain (without parser) took 39004.06 ms. Allocated memory was 138.9 MB in the beginning and 426.8 MB in the end (delta: 287.8 MB). Free memory was 100.1 MB in the beginning and 336.5 MB in the end (delta: -236.3 MB). Peak memory consumption was 51.5 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:55,749 INFO L168 Benchmark]: CDTParser took 1.88 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-16 11:32:55,750 INFO L168 Benchmark]: CACSL2BoogieTranslator took 374.79 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 99.7 MB in the beginning and 178.7 MB in the end (delta: -79.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:55,751 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.38 ms. Allocated memory is still 202.4 MB. Free memory was 178.0 MB in the beginning and 176.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:55,751 INFO L168 Benchmark]: Boogie Preprocessor took 31.66 ms. Allocated memory is still 202.4 MB. Free memory was 176.7 MB in the beginning and 174.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:55,755 INFO L168 Benchmark]: RCFGBuilder took 537.31 ms. Allocated memory is still 202.4 MB. Free memory was 174.7 MB in the beginning and 147.9 MB in the end (delta: 26.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:55,756 INFO L168 Benchmark]: TraceAbstraction took 38010.73 ms. Allocated memory was 202.4 MB in the beginning and 426.8 MB in the end (delta: 224.4 MB). Free memory was 147.9 MB in the beginning and 336.5 MB in the end (delta: -188.5 MB). Peak memory consumption was 35.9 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:55,759 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.88 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 374.79 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 99.7 MB in the beginning and 178.7 MB in the end (delta: -79.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.38 ms. Allocated memory is still 202.4 MB. Free memory was 178.0 MB in the beginning and 176.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.66 ms. Allocated memory is still 202.4 MB. Free memory was 176.7 MB in the beginning and 174.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 537.31 ms. Allocated memory is still 202.4 MB. Free memory was 174.7 MB in the beginning and 147.9 MB in the end (delta: 26.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 38010.73 ms. Allocated memory was 202.4 MB in the beginning and 426.8 MB in the end (delta: 224.4 MB). Free memory was 147.9 MB in the beginning and 336.5 MB in the end (delta: -188.5 MB). Peak memory consumption was 35.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1346 VarBasedMoverChecksPositive, 31 VarBasedMoverChecksNegative, 6 SemBasedMoverChecksPositive, 25 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 122 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.5s, 135 PlacesBefore, 31 PlacesAfterwards, 138 TransitionsBefore, 30 TransitionsAfterwards, 1920 CoEnabledTransitionPairs, 7 FixpointIterations, 70 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 11 ConcurrentYvCompositions, 4 ChoiceCompositions, 125 TotalNumberOfCompositions, 4040 MoverChecksTotal - PositiveResult [Line: 67]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 107 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 37.8s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 25.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.5s, HoareTripleCheckerStatistics: 303 SDtfs, 1726 SDslu, 817 SDs, 0 SdLazy, 2476 SolverSat, 321 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 309 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 23.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=176occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 919 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 326 NumberOfCodeBlocks, 322 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 310 ConstructedInterpolants, 40 QuantifiedInterpolants, 139420 SizeOfPredicates, 73 NumberOfNonLiveVariables, 820 ConjunctsInSsa, 194 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 14/42 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...