/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/stack_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 18:10:48,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 18:10:48,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 18:10:48,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 18:10:48,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 18:10:48,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 18:10:48,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 18:10:48,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 18:10:48,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 18:10:48,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 18:10:48,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 18:10:48,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 18:10:48,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 18:10:48,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 18:10:48,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 18:10:48,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 18:10:48,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 18:10:48,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 18:10:48,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 18:10:48,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 18:10:48,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 18:10:48,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 18:10:48,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 18:10:48,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 18:10:48,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 18:10:48,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 18:10:48,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 18:10:48,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 18:10:48,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 18:10:48,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-06-05 18:10:48,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 18:10:48,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 18:10:48,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 18:10:48,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 18:10:48,529 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 18:10:48,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 18:10:48,530 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 18:10:48,530 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 18:10:48,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 18:10:48,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 18:10:48,532 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 18:10:48,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 18:10:48,533 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 18:10:48,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 18:10:48,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 18:10:48,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 18:10:48,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 18:10:48,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 18:10:48,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 18:10:48,535 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 18:10:48,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 18:10:48,535 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 18:10:48,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 18:10:48,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 18:10:48,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 18:10:48,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 18:10:48,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 18:10:48,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 18:10:48,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 18:10:48,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 18:10:48,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 18:10:48,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 18:10:48,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 18:10:48,537 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 18:10:48,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 18:10:48,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 18:10:48,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 18:10:48,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 18:10:48,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 18:10:48,887 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 18:10:48,887 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 18:10:48,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2021-06-05 18:10:48,940 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd089e135/e1c6bf8bfe7f46afa89262f6035a55d5/FLAG909fe64cc [2021-06-05 18:10:49,409 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 18:10:49,409 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2021-06-05 18:10:49,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd089e135/e1c6bf8bfe7f46afa89262f6035a55d5/FLAG909fe64cc [2021-06-05 18:10:49,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd089e135/e1c6bf8bfe7f46afa89262f6035a55d5 [2021-06-05 18:10:49,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 18:10:49,702 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 18:10:49,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 18:10:49,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 18:10:49,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 18:10:49,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:10:49" (1/1) ... [2021-06-05 18:10:49,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d5882a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:49, skipping insertion in model container [2021-06-05 18:10:49,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:10:49" (1/1) ... [2021-06-05 18:10:49,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 18:10:49,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 18:10:50,085 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i[41529,41542] [2021-06-05 18:10:50,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:10:50,128 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 18:10:50,165 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i[41529,41542] [2021-06-05 18:10:50,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:10:50,283 INFO L208 MainTranslator]: Completed translation [2021-06-05 18:10:50,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:50 WrapperNode [2021-06-05 18:10:50,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 18:10:50,284 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 18:10:50,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 18:10:50,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 18:10:50,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:50" (1/1) ... [2021-06-05 18:10:50,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:50" (1/1) ... [2021-06-05 18:10:50,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 18:10:50,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 18:10:50,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 18:10:50,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 18:10:50,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:50" (1/1) ... [2021-06-05 18:10:50,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:50" (1/1) ... [2021-06-05 18:10:50,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:50" (1/1) ... [2021-06-05 18:10:50,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:50" (1/1) ... [2021-06-05 18:10:50,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:50" (1/1) ... [2021-06-05 18:10:50,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:50" (1/1) ... [2021-06-05 18:10:50,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:50" (1/1) ... [2021-06-05 18:10:50,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 18:10:50,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 18:10:50,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 18:10:50,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 18:10:50,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 18:10:50,420 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 18:10:50,420 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 18:10:50,420 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 18:10:50,420 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 18:10:50,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 18:10:50,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 18:10:50,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-06-05 18:10:50,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 18:10:50,421 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-06-05 18:10:50,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 18:10:50,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 18:10:50,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 18:10:50,422 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 18:10:50,842 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 18:10:50,842 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2021-06-05 18:10:50,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:10:50 BoogieIcfgContainer [2021-06-05 18:10:50,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 18:10:50,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 18:10:50,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 18:10:50,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 18:10:50,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 06:10:49" (1/3) ... [2021-06-05 18:10:50,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd89d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:10:50, skipping insertion in model container [2021-06-05 18:10:50,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:50" (2/3) ... [2021-06-05 18:10:50,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd89d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:10:50, skipping insertion in model container [2021-06-05 18:10:50,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:10:50" (3/3) ... [2021-06-05 18:10:50,850 INFO L111 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2021-06-05 18:10:50,854 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 18:10:50,855 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 18:10:50,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-05 18:10:50,855 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 18:10:50,903 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,904 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,904 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,904 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,906 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,906 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,906 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,906 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,908 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,908 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,908 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,908 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,908 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,908 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,908 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,909 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,909 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,909 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,909 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,909 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,909 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,909 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,910 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,910 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,910 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,910 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,910 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,910 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,924 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,925 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,925 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,925 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,925 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,925 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,925 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,925 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,925 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,926 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,926 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,926 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,926 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,926 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,926 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,926 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,926 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,926 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,926 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,926 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,927 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,927 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,927 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,927 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,927 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,927 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,928 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,928 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,928 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,928 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,928 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,928 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,928 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,928 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,929 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,930 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,930 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,930 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,930 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,930 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,930 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,930 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,931 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,931 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,931 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,931 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,931 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,931 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,931 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,932 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,932 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,932 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,932 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,932 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,932 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,932 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,932 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,933 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,933 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,933 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,933 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,934 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,934 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,934 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,934 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,934 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,934 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,934 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,935 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,935 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,935 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,935 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,935 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,935 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,935 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,936 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,936 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,936 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,936 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,936 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,936 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,937 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,937 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,937 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,937 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,938 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,938 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,938 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,938 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,938 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,938 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,938 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,938 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,939 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,939 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,939 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,939 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,939 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,939 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,939 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,940 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,940 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,940 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,940 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,941 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,941 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,941 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,942 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,942 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,948 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,948 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,948 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,948 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,948 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,948 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,948 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,948 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,949 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,949 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,949 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,949 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,949 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,949 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,949 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,949 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,949 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,949 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,950 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,950 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,950 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,950 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,950 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,950 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,950 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,950 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,950 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,951 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,951 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,951 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,954 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,954 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,954 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,955 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,955 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,955 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,955 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,955 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,956 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,956 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,956 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,956 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,956 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,957 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,957 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,957 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,964 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,965 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,965 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,965 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,965 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,965 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,965 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,965 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,966 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,966 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,966 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,966 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,966 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,966 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,966 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,967 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,967 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,967 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,967 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,967 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,967 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,967 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,968 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,968 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,968 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,968 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,968 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,968 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,968 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,968 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,969 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,969 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,969 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,969 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,969 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,969 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,976 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,977 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,977 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,977 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,977 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,977 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,977 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,977 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,979 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,979 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,979 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,979 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,979 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,979 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,980 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,980 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,983 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,983 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,983 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,984 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,984 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,986 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,986 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,986 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,987 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,987 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,992 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,992 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,993 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,993 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,993 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,993 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,993 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,993 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,993 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,994 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,994 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,994 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:50,994 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:51,002 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 18:10:51,017 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:10:51,034 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:10:51,034 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:10:51,035 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:10:51,035 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:10:51,035 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:10:51,035 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:10:51,035 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:10:51,035 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t1Thread1of1ForFork1======== [2021-06-05 18:10:51,045 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-06-05 18:10:51,442 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8464 states, 8460 states have (on average 2.8685579196217494) internal successors, (24268), 8463 states have internal predecessors, (24268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 8464 states, 8460 states have (on average 2.8685579196217494) internal successors, (24268), 8463 states have internal predecessors, (24268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:51,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 18:10:51,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:51,525 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:10:51,525 INFO L430 AbstractCegarLoop]: === Iteration 1 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:51,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:51,533 INFO L82 PathProgramCache]: Analyzing trace with hash -712665903, now seen corresponding path program 1 times [2021-06-05 18:10:51,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:51,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767804436] [2021-06-05 18:10:51,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:51,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:51,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767804436] [2021-06-05 18:10:51,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767804436] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:10:51,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:10:51,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 18:10:51,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282253965] [2021-06-05 18:10:51,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 18:10:51,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:51,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 18:10:51,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:10:51,856 INFO L87 Difference]: Start difference. First operand has 8464 states, 8460 states have (on average 2.8685579196217494) internal successors, (24268), 8463 states have internal predecessors, (24268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:51,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:51,983 INFO L93 Difference]: Finished difference Result 11835 states and 32305 transitions. [2021-06-05 18:10:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 18:10:51,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 18:10:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:52,049 INFO L225 Difference]: With dead ends: 11835 [2021-06-05 18:10:52,049 INFO L226 Difference]: Without dead ends: 10548 [2021-06-05 18:10:52,050 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:10:52,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10548 states. [2021-06-05 18:10:52,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10548 to 10224. [2021-06-05 18:10:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10224 states, 10222 states have (on average 2.759929563686167) internal successors, (28212), 10223 states have internal predecessors, (28212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:52,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10224 states to 10224 states and 28212 transitions. [2021-06-05 18:10:52,605 INFO L78 Accepts]: Start accepts. Automaton has 10224 states and 28212 transitions. Word has length 54 [2021-06-05 18:10:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:52,606 INFO L482 AbstractCegarLoop]: Abstraction has 10224 states and 28212 transitions. [2021-06-05 18:10:52,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 10224 states and 28212 transitions. [2021-06-05 18:10:52,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 18:10:52,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:52,616 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:10:52,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 18:10:52,617 INFO L430 AbstractCegarLoop]: === Iteration 2 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:52,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:52,621 INFO L82 PathProgramCache]: Analyzing trace with hash -89293531, now seen corresponding path program 1 times [2021-06-05 18:10:52,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:52,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878457801] [2021-06-05 18:10:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:52,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:52,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878457801] [2021-06-05 18:10:52,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878457801] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:10:52,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:10:52,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:10:52,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261703619] [2021-06-05 18:10:52,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:10:52,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:52,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:10:52,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:10:52,793 INFO L87 Difference]: Start difference. First operand 10224 states and 28212 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:52,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:52,978 INFO L93 Difference]: Finished difference Result 15012 states and 41360 transitions. [2021-06-05 18:10:52,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 18:10:52,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 18:10:52,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:53,044 INFO L225 Difference]: With dead ends: 15012 [2021-06-05 18:10:53,045 INFO L226 Difference]: Without dead ends: 15012 [2021-06-05 18:10:53,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:10:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15012 states. [2021-06-05 18:10:53,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15012 to 10980. [2021-06-05 18:10:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10978 states have (on average 2.7589724904354163) internal successors, (30288), 10979 states have internal predecessors, (30288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:53,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 30288 transitions. [2021-06-05 18:10:53,381 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 30288 transitions. Word has length 63 [2021-06-05 18:10:53,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:53,382 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 30288 transitions. [2021-06-05 18:10:53,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 30288 transitions. [2021-06-05 18:10:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-06-05 18:10:53,393 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:53,394 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:10:53,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 18:10:53,394 INFO L430 AbstractCegarLoop]: === Iteration 3 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:53,401 INFO L82 PathProgramCache]: Analyzing trace with hash -835995566, now seen corresponding path program 1 times [2021-06-05 18:10:53,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:53,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993230415] [2021-06-05 18:10:53,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:53,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:53,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993230415] [2021-06-05 18:10:53,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993230415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:53,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719675511] [2021-06-05 18:10:53,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:53,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 18:10:53,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:53,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719675511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:53,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:53,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 18:10:53,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730191685] [2021-06-05 18:10:53,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:10:53,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:53,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:10:53,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:10:53,989 INFO L87 Difference]: Start difference. First operand 10980 states and 30288 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:54,250 INFO L93 Difference]: Finished difference Result 18555 states and 50921 transitions. [2021-06-05 18:10:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 18:10:54,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-06-05 18:10:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:54,295 INFO L225 Difference]: With dead ends: 18555 [2021-06-05 18:10:54,295 INFO L226 Difference]: Without dead ends: 18555 [2021-06-05 18:10:54,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:10:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18555 states. [2021-06-05 18:10:54,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18555 to 14604. [2021-06-05 18:10:54,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14604 states, 14602 states have (on average 2.753116011505273) internal successors, (40201), 14603 states have internal predecessors, (40201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:54,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14604 states to 14604 states and 40201 transitions. [2021-06-05 18:10:54,727 INFO L78 Accepts]: Start accepts. Automaton has 14604 states and 40201 transitions. Word has length 88 [2021-06-05 18:10:54,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:54,728 INFO L482 AbstractCegarLoop]: Abstraction has 14604 states and 40201 transitions. [2021-06-05 18:10:54,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:54,728 INFO L276 IsEmpty]: Start isEmpty. Operand 14604 states and 40201 transitions. [2021-06-05 18:10:54,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-06-05 18:10:54,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:54,749 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:10:54,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 18:10:54,965 INFO L430 AbstractCegarLoop]: === Iteration 4 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:54,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:54,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1893907773, now seen corresponding path program 1 times [2021-06-05 18:10:54,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:54,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208394733] [2021-06-05 18:10:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 18:10:55,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:55,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208394733] [2021-06-05 18:10:55,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208394733] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:10:55,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:10:55,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 18:10:55,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870574029] [2021-06-05 18:10:55,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 18:10:55,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:55,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 18:10:55,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:10:55,050 INFO L87 Difference]: Start difference. First operand 14604 states and 40201 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:55,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:55,086 INFO L93 Difference]: Finished difference Result 6196 states and 15963 transitions. [2021-06-05 18:10:55,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 18:10:55,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-06-05 18:10:55,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:55,099 INFO L225 Difference]: With dead ends: 6196 [2021-06-05 18:10:55,099 INFO L226 Difference]: Without dead ends: 6076 [2021-06-05 18:10:55,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:10:55,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6076 states. [2021-06-05 18:10:55,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6076 to 5876. [2021-06-05 18:10:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5876 states, 5874 states have (on average 2.5718420156622406) internal successors, (15107), 5875 states have internal predecessors, (15107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5876 states to 5876 states and 15107 transitions. [2021-06-05 18:10:55,305 INFO L78 Accepts]: Start accepts. Automaton has 5876 states and 15107 transitions. Word has length 109 [2021-06-05 18:10:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:55,306 INFO L482 AbstractCegarLoop]: Abstraction has 5876 states and 15107 transitions. [2021-06-05 18:10:55,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 5876 states and 15107 transitions. [2021-06-05 18:10:55,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-06-05 18:10:55,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:55,318 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:10:55,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 18:10:55,319 INFO L430 AbstractCegarLoop]: === Iteration 5 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:55,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:55,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1832797293, now seen corresponding path program 2 times [2021-06-05 18:10:55,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:55,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845523524] [2021-06-05 18:10:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:55,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:55,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845523524] [2021-06-05 18:10:55,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845523524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:55,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596512934] [2021-06-05 18:10:55,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:55,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:10:55,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:10:55,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 18:10:55,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:55,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596512934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:55,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:55,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 18:10:55,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629897987] [2021-06-05 18:10:55,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:10:55,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:55,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:10:55,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:10:55,845 INFO L87 Difference]: Start difference. First operand 5876 states and 15107 transitions. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:55,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:55,991 INFO L93 Difference]: Finished difference Result 9595 states and 24725 transitions. [2021-06-05 18:10:55,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 18:10:55,991 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-06-05 18:10:55,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:56,012 INFO L225 Difference]: With dead ends: 9595 [2021-06-05 18:10:56,012 INFO L226 Difference]: Without dead ends: 9595 [2021-06-05 18:10:56,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:10:56,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9595 states. [2021-06-05 18:10:56,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9595 to 7678. [2021-06-05 18:10:56,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7678 states, 7676 states have (on average 2.568655549765503) internal successors, (19717), 7677 states have internal predecessors, (19717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7678 states to 7678 states and 19717 transitions. [2021-06-05 18:10:56,159 INFO L78 Accepts]: Start accepts. Automaton has 7678 states and 19717 transitions. Word has length 122 [2021-06-05 18:10:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:56,160 INFO L482 AbstractCegarLoop]: Abstraction has 7678 states and 19717 transitions. [2021-06-05 18:10:56,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 7678 states and 19717 transitions. [2021-06-05 18:10:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-06-05 18:10:56,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:56,172 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:10:56,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:56,392 INFO L430 AbstractCegarLoop]: === Iteration 6 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:56,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1290156653, now seen corresponding path program 1 times [2021-06-05 18:10:56,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:56,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950364392] [2021-06-05 18:10:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:56,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:56,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950364392] [2021-06-05 18:10:56,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950364392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:56,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581655736] [2021-06-05 18:10:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:56,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 18:10:56,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:10:56,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581655736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:56,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:56,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 18:10:56,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372352416] [2021-06-05 18:10:56,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 18:10:56,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:56,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 18:10:56,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 18:10:56,902 INFO L87 Difference]: Start difference. First operand 7678 states and 19717 transitions. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:57,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:57,055 INFO L93 Difference]: Finished difference Result 11373 states and 29306 transitions. [2021-06-05 18:10:57,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:10:57,055 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-06-05 18:10:57,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:57,081 INFO L225 Difference]: With dead ends: 11373 [2021-06-05 18:10:57,081 INFO L226 Difference]: Without dead ends: 11373 [2021-06-05 18:10:57,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:10:57,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2021-06-05 18:10:57,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 8938. [2021-06-05 18:10:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8938 states, 8936 states have (on average 2.5924350940017904) internal successors, (23166), 8937 states have internal predecessors, (23166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8938 states to 8938 states and 23166 transitions. [2021-06-05 18:10:57,315 INFO L78 Accepts]: Start accepts. Automaton has 8938 states and 23166 transitions. Word has length 123 [2021-06-05 18:10:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:57,316 INFO L482 AbstractCegarLoop]: Abstraction has 8938 states and 23166 transitions. [2021-06-05 18:10:57,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:57,316 INFO L276 IsEmpty]: Start isEmpty. Operand 8938 states and 23166 transitions. [2021-06-05 18:10:57,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-06-05 18:10:57,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:57,333 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:10:57,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:57,541 INFO L430 AbstractCegarLoop]: === Iteration 7 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:57,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:57,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1495248532, now seen corresponding path program 3 times [2021-06-05 18:10:57,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:57,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580002395] [2021-06-05 18:10:57,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:57,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:57,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580002395] [2021-06-05 18:10:57,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580002395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:57,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934665944] [2021-06-05 18:10:57,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:57,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:10:57,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:10:57,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 18:10:57,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:58,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934665944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:58,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:58,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 18:10:58,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381470809] [2021-06-05 18:10:58,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:10:58,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:58,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:10:58,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:10:58,113 INFO L87 Difference]: Start difference. First operand 8938 states and 23166 transitions. Second operand has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:58,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:58,293 INFO L93 Difference]: Finished difference Result 13937 states and 35971 transitions. [2021-06-05 18:10:58,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 18:10:58,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-06-05 18:10:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:58,314 INFO L225 Difference]: With dead ends: 13937 [2021-06-05 18:10:58,314 INFO L226 Difference]: Without dead ends: 13937 [2021-06-05 18:10:58,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:10:58,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13937 states. [2021-06-05 18:10:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13937 to 10740. [2021-06-05 18:10:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10740 states, 10738 states have (on average 2.5867014341590613) internal successors, (27776), 10739 states have internal predecessors, (27776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10740 states to 10740 states and 27776 transitions. [2021-06-05 18:10:58,533 INFO L78 Accepts]: Start accepts. Automaton has 10740 states and 27776 transitions. Word has length 156 [2021-06-05 18:10:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:58,534 INFO L482 AbstractCegarLoop]: Abstraction has 10740 states and 27776 transitions. [2021-06-05 18:10:58,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 10740 states and 27776 transitions. [2021-06-05 18:10:58,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-06-05 18:10:58,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:58,551 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:10:58,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:58,765 INFO L430 AbstractCegarLoop]: === Iteration 8 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:58,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:58,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1195624180, now seen corresponding path program 2 times [2021-06-05 18:10:58,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:58,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997656709] [2021-06-05 18:10:58,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:10:58,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:58,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997656709] [2021-06-05 18:10:58,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997656709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:58,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27751348] [2021-06-05 18:10:58,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:59,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:10:59,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:10:59,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 18:10:59,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:10:59,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27751348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:59,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:59,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:10:59,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711198623] [2021-06-05 18:10:59,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:10:59,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:59,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:10:59,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:10:59,263 INFO L87 Difference]: Start difference. First operand 10740 states and 27776 transitions. Second operand has 10 states, 10 states have (on average 20.1) internal successors, (201), 10 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:59,447 INFO L93 Difference]: Finished difference Result 15875 states and 41000 transitions. [2021-06-05 18:10:59,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 18:10:59,448 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.1) internal successors, (201), 10 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-06-05 18:10:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:59,472 INFO L225 Difference]: With dead ends: 15875 [2021-06-05 18:10:59,472 INFO L226 Difference]: Without dead ends: 15875 [2021-06-05 18:10:59,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:10:59,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15875 states. [2021-06-05 18:10:59,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15875 to 12000. [2021-06-05 18:10:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12000 states, 11998 states have (on average 2.60251708618103) internal successors, (31225), 11999 states have internal predecessors, (31225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:59,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12000 states to 12000 states and 31225 transitions. [2021-06-05 18:10:59,743 INFO L78 Accepts]: Start accepts. Automaton has 12000 states and 31225 transitions. Word has length 157 [2021-06-05 18:10:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:59,744 INFO L482 AbstractCegarLoop]: Abstraction has 12000 states and 31225 transitions. [2021-06-05 18:10:59,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 20.1) internal successors, (201), 10 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:59,744 INFO L276 IsEmpty]: Start isEmpty. Operand 12000 states and 31225 transitions. [2021-06-05 18:10:59,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:10:59,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:59,767 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:10:59,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:59,981 INFO L430 AbstractCegarLoop]: === Iteration 9 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:59,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:59,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1830396245, now seen corresponding path program 4 times [2021-06-05 18:10:59,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:59,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21121736] [2021-06-05 18:10:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:00,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:00,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21121736] [2021-06-05 18:11:00,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21121736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:00,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580827839] [2021-06-05 18:11:00,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:00,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:11:00,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:00,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:11:00,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:00,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580827839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:00,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:00,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:11:00,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075766839] [2021-06-05 18:11:00,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:11:00,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:00,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:11:00,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:11:00,645 INFO L87 Difference]: Start difference. First operand 12000 states and 31225 transitions. Second operand has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:00,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:00,893 INFO L93 Difference]: Finished difference Result 17199 states and 44580 transitions. [2021-06-05 18:11:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:11:00,894 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-05 18:11:00,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:00,918 INFO L225 Difference]: With dead ends: 17199 [2021-06-05 18:11:00,919 INFO L226 Difference]: Without dead ends: 17199 [2021-06-05 18:11:00,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:11:00,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17199 states. [2021-06-05 18:11:01,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17199 to 13802. [2021-06-05 18:11:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13800 states have (on average 2.5967391304347824) internal successors, (35835), 13801 states have internal predecessors, (35835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:01,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 35835 transitions. [2021-06-05 18:11:01,214 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 35835 transitions. Word has length 190 [2021-06-05 18:11:01,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:01,214 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 35835 transitions. [2021-06-05 18:11:01,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:01,214 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 35835 transitions. [2021-06-05 18:11:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-06-05 18:11:01,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:01,238 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:01,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:01,453 INFO L430 AbstractCegarLoop]: === Iteration 10 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:01,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:01,453 INFO L82 PathProgramCache]: Analyzing trace with hash -111979729, now seen corresponding path program 3 times [2021-06-05 18:11:01,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:01,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252473854] [2021-06-05 18:11:01,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:11:01,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:01,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252473854] [2021-06-05 18:11:01,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252473854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:01,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779665058] [2021-06-05 18:11:01,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:01,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:11:01,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:01,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:11:01,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 113 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:02,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779665058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:02,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:02,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 18:11:02,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867705438] [2021-06-05 18:11:02,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:11:02,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:02,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:11:02,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:11:02,083 INFO L87 Difference]: Start difference. First operand 13802 states and 35835 transitions. Second operand has 10 states, 10 states have (on average 21.4) internal successors, (214), 10 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:02,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:02,279 INFO L93 Difference]: Finished difference Result 17787 states and 46053 transitions. [2021-06-05 18:11:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 18:11:02,279 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.4) internal successors, (214), 10 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-06-05 18:11:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:02,304 INFO L225 Difference]: With dead ends: 17787 [2021-06-05 18:11:02,304 INFO L226 Difference]: Without dead ends: 17787 [2021-06-05 18:11:02,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:11:02,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17787 states. [2021-06-05 18:11:02,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17787 to 13802. [2021-06-05 18:11:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13800 states have (on average 2.5967391304347824) internal successors, (35835), 13801 states have internal predecessors, (35835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:02,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 35835 transitions. [2021-06-05 18:11:02,595 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 35835 transitions. Word has length 191 [2021-06-05 18:11:02,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:02,595 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 35835 transitions. [2021-06-05 18:11:02,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 21.4) internal successors, (214), 10 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:02,596 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 35835 transitions. [2021-06-05 18:11:02,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-06-05 18:11:02,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:02,614 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:02,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 18:11:02,829 INFO L430 AbstractCegarLoop]: === Iteration 11 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:02,829 INFO L82 PathProgramCache]: Analyzing trace with hash -567160853, now seen corresponding path program 4 times [2021-06-05 18:11:02,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:02,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856063587] [2021-06-05 18:11:02,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:11:02,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:02,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856063587] [2021-06-05 18:11:02,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856063587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:02,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896476877] [2021-06-05 18:11:02,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:03,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:11:03,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:03,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:11:03,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:11:03,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896476877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:03,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:03,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:11:03,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413199411] [2021-06-05 18:11:03,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:11:03,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:03,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:11:03,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:11:03,432 INFO L87 Difference]: Start difference. First operand 13802 states and 35835 transitions. Second operand has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:03,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:03,708 INFO L93 Difference]: Finished difference Result 19137 states and 49609 transitions. [2021-06-05 18:11:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:11:03,708 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-06-05 18:11:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:03,729 INFO L225 Difference]: With dead ends: 19137 [2021-06-05 18:11:03,729 INFO L226 Difference]: Without dead ends: 19137 [2021-06-05 18:11:03,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:11:03,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19137 states. [2021-06-05 18:11:03,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19137 to 13802. [2021-06-05 18:11:03,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13800 states have (on average 2.5967391304347824) internal successors, (35835), 13801 states have internal predecessors, (35835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 35835 transitions. [2021-06-05 18:11:03,973 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 35835 transitions. Word has length 191 [2021-06-05 18:11:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:03,973 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 35835 transitions. [2021-06-05 18:11:03,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:03,974 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 35835 transitions. [2021-06-05 18:11:03,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-06-05 18:11:03,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:03,988 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:04,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 18:11:04,205 INFO L430 AbstractCegarLoop]: === Iteration 12 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:04,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1336481917, now seen corresponding path program 1 times [2021-06-05 18:11:04,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:04,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904511744] [2021-06-05 18:11:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 9 proven. 148 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-05 18:11:04,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:04,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904511744] [2021-06-05 18:11:04,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904511744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:04,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966907841] [2021-06-05 18:11:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:04,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:11:04,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 9 proven. 124 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-05 18:11:04,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966907841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:04,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:04,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-06-05 18:11:04,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962983532] [2021-06-05 18:11:04,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:11:04,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:04,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:11:04,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:11:04,878 INFO L87 Difference]: Start difference. First operand 13802 states and 35835 transitions. Second operand has 11 states, 11 states have (on average 20.818181818181817) internal successors, (229), 11 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:05,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:05,092 INFO L93 Difference]: Finished difference Result 24997 states and 64918 transitions. [2021-06-05 18:11:05,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 18:11:05,093 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 20.818181818181817) internal successors, (229), 11 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-06-05 18:11:05,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:05,122 INFO L225 Difference]: With dead ends: 24997 [2021-06-05 18:11:05,122 INFO L226 Difference]: Without dead ends: 24997 [2021-06-05 18:11:05,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:11:05,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24997 states. [2021-06-05 18:11:05,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24997 to 14962. [2021-06-05 18:11:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14962 states, 14960 states have (on average 2.606216577540107) internal successors, (38989), 14961 states have internal predecessors, (38989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:05,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14962 states to 14962 states and 38989 transitions. [2021-06-05 18:11:05,356 INFO L78 Accepts]: Start accepts. Automaton has 14962 states and 38989 transitions. Word has length 220 [2021-06-05 18:11:05,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:05,356 INFO L482 AbstractCegarLoop]: Abstraction has 14962 states and 38989 transitions. [2021-06-05 18:11:05,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 20.818181818181817) internal successors, (229), 11 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:05,357 INFO L276 IsEmpty]: Start isEmpty. Operand 14962 states and 38989 transitions. [2021-06-05 18:11:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-06-05 18:11:05,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:05,377 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:05,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:05,600 INFO L430 AbstractCegarLoop]: === Iteration 13 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:05,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:05,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1317035050, now seen corresponding path program 5 times [2021-06-05 18:11:05,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:05,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142880460] [2021-06-05 18:11:05,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:05,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:05,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142880460] [2021-06-05 18:11:05,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142880460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:05,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568415222] [2021-06-05 18:11:05,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:05,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:11:05,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:05,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:11:05,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:06,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568415222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:06,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:06,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:11:06,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337020778] [2021-06-05 18:11:06,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:11:06,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:06,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:11:06,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:11:06,260 INFO L87 Difference]: Start difference. First operand 14962 states and 38989 transitions. Second operand has 15 states, 15 states have (on average 18.066666666666666) internal successors, (271), 15 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:06,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:06,580 INFO L93 Difference]: Finished difference Result 20871 states and 54084 transitions. [2021-06-05 18:11:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:11:06,580 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 18.066666666666666) internal successors, (271), 15 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2021-06-05 18:11:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:06,598 INFO L225 Difference]: With dead ends: 20871 [2021-06-05 18:11:06,598 INFO L226 Difference]: Without dead ends: 20871 [2021-06-05 18:11:06,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:11:06,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20871 states. [2021-06-05 18:11:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20871 to 16764. [2021-06-05 18:11:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16764 states, 16762 states have (on average 2.6010619257845127) internal successors, (43599), 16763 states have internal predecessors, (43599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16764 states to 16764 states and 43599 transitions. [2021-06-05 18:11:06,808 INFO L78 Accepts]: Start accepts. Automaton has 16764 states and 43599 transitions. Word has length 224 [2021-06-05 18:11:06,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:06,809 INFO L482 AbstractCegarLoop]: Abstraction has 16764 states and 43599 transitions. [2021-06-05 18:11:06,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 18.066666666666666) internal successors, (271), 15 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 16764 states and 43599 transitions. [2021-06-05 18:11:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-06-05 18:11:06,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:06,829 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:07,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:07,053 INFO L430 AbstractCegarLoop]: === Iteration 14 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:07,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:07,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1621122864, now seen corresponding path program 5 times [2021-06-05 18:11:07,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:07,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179988284] [2021-06-05 18:11:07,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:11:07,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:07,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179988284] [2021-06-05 18:11:07,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179988284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:07,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904022084] [2021-06-05 18:11:07,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:07,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:11:07,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:07,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:11:07,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:07,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904022084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:07,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:07,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 18:11:07,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170973412] [2021-06-05 18:11:07,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:11:07,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:07,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:11:07,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:11:07,674 INFO L87 Difference]: Start difference. First operand 16764 states and 43599 transitions. Second operand has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:07,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:07,903 INFO L93 Difference]: Finished difference Result 23844 states and 61943 transitions. [2021-06-05 18:11:07,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:11:07,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-06-05 18:11:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:07,931 INFO L225 Difference]: With dead ends: 23844 [2021-06-05 18:11:07,932 INFO L226 Difference]: Without dead ends: 23844 [2021-06-05 18:11:07,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:11:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23844 states. [2021-06-05 18:11:08,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23844 to 18704. [2021-06-05 18:11:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18704 states, 18702 states have (on average 2.6167254839054648) internal successors, (48938), 18703 states have internal predecessors, (48938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18704 states to 18704 states and 48938 transitions. [2021-06-05 18:11:08,194 INFO L78 Accepts]: Start accepts. Automaton has 18704 states and 48938 transitions. Word has length 225 [2021-06-05 18:11:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:08,194 INFO L482 AbstractCegarLoop]: Abstraction has 18704 states and 48938 transitions. [2021-06-05 18:11:08,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 18704 states and 48938 transitions. [2021-06-05 18:11:08,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-06-05 18:11:08,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:08,212 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:08,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 18:11:08,417 INFO L430 AbstractCegarLoop]: === Iteration 15 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:08,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:08,417 INFO L82 PathProgramCache]: Analyzing trace with hash 414347854, now seen corresponding path program 6 times [2021-06-05 18:11:08,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:08,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093908224] [2021-06-05 18:11:08,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:08,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:08,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093908224] [2021-06-05 18:11:08,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093908224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:08,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317031984] [2021-06-05 18:11:08,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:08,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:11:08,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:08,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:11:08,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:09,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317031984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:09,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:09,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:11:09,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879914272] [2021-06-05 18:11:09,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:11:09,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:09,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:11:09,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:11:09,092 INFO L87 Difference]: Start difference. First operand 18704 states and 48938 transitions. Second operand has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:09,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:09,344 INFO L93 Difference]: Finished difference Result 30389 states and 79003 transitions. [2021-06-05 18:11:09,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:11:09,344 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-06-05 18:11:09,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:09,379 INFO L225 Difference]: With dead ends: 30389 [2021-06-05 18:11:09,379 INFO L226 Difference]: Without dead ends: 30389 [2021-06-05 18:11:09,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:11:09,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30389 states. [2021-06-05 18:11:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30389 to 19964. [2021-06-05 18:11:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19964 states, 19962 states have (on average 2.624336238853822) internal successors, (52387), 19963 states have internal predecessors, (52387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19964 states to 19964 states and 52387 transitions. [2021-06-05 18:11:09,665 INFO L78 Accepts]: Start accepts. Automaton has 19964 states and 52387 transitions. Word has length 225 [2021-06-05 18:11:09,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:09,665 INFO L482 AbstractCegarLoop]: Abstraction has 19964 states and 52387 transitions. [2021-06-05 18:11:09,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand 19964 states and 52387 transitions. [2021-06-05 18:11:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-06-05 18:11:09,683 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:09,683 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:09,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 18:11:09,884 INFO L430 AbstractCegarLoop]: === Iteration 16 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:09,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:09,884 INFO L82 PathProgramCache]: Analyzing trace with hash -40833270, now seen corresponding path program 7 times [2021-06-05 18:11:09,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:09,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393549729] [2021-06-05 18:11:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 250 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:11:10,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:10,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393549729] [2021-06-05 18:11:10,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393549729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:10,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861601158] [2021-06-05 18:11:10,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:10,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:11:10,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 250 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:11:10,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861601158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:10,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:10,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:11:10,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239822891] [2021-06-05 18:11:10,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:11:10,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:10,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:11:10,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:11:10,429 INFO L87 Difference]: Start difference. First operand 19964 states and 52387 transitions. Second operand has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:10,736 INFO L93 Difference]: Finished difference Result 29709 states and 77502 transitions. [2021-06-05 18:11:10,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:11:10,736 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-06-05 18:11:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:10,779 INFO L225 Difference]: With dead ends: 29709 [2021-06-05 18:11:10,779 INFO L226 Difference]: Without dead ends: 29709 [2021-06-05 18:11:10,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=206, Invalid=550, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:11:10,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29709 states. [2021-06-05 18:11:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29709 to 19964. [2021-06-05 18:11:11,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19964 states, 19962 states have (on average 2.624336238853822) internal successors, (52387), 19963 states have internal predecessors, (52387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19964 states to 19964 states and 52387 transitions. [2021-06-05 18:11:11,105 INFO L78 Accepts]: Start accepts. Automaton has 19964 states and 52387 transitions. Word has length 225 [2021-06-05 18:11:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:11,105 INFO L482 AbstractCegarLoop]: Abstraction has 19964 states and 52387 transitions. [2021-06-05 18:11:11,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 19964 states and 52387 transitions. [2021-06-05 18:11:11,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-06-05 18:11:11,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:11,123 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:11,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 18:11:11,324 INFO L430 AbstractCegarLoop]: === Iteration 17 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:11,325 INFO L82 PathProgramCache]: Analyzing trace with hash -288124132, now seen corresponding path program 2 times [2021-06-05 18:11:11,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:11,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548714279] [2021-06-05 18:11:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 265 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-05 18:11:11,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:11,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548714279] [2021-06-05 18:11:11,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548714279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:11,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223801896] [2021-06-05 18:11:11,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:11,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:11:11,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:11,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:11:11,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 241 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-05 18:11:12,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223801896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:12,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:12,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 18:11:12,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483699049] [2021-06-05 18:11:12,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:11:12,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:12,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:11:12,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:11:12,080 INFO L87 Difference]: Start difference. First operand 19964 states and 52387 transitions. Second operand has 13 states, 13 states have (on average 20.23076923076923) internal successors, (263), 13 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:12,331 INFO L93 Difference]: Finished difference Result 33419 states and 87480 transitions. [2021-06-05 18:11:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:11:12,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 20.23076923076923) internal successors, (263), 13 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2021-06-05 18:11:12,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:12,371 INFO L225 Difference]: With dead ends: 33419 [2021-06-05 18:11:12,372 INFO L226 Difference]: Without dead ends: 33419 [2021-06-05 18:11:12,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:11:12,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33419 states. [2021-06-05 18:11:12,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33419 to 19964. [2021-06-05 18:11:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19964 states, 19962 states have (on average 2.624336238853822) internal successors, (52387), 19963 states have internal predecessors, (52387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:12,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19964 states to 19964 states and 52387 transitions. [2021-06-05 18:11:12,730 INFO L78 Accepts]: Start accepts. Automaton has 19964 states and 52387 transitions. Word has length 254 [2021-06-05 18:11:12,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:12,730 INFO L482 AbstractCegarLoop]: Abstraction has 19964 states and 52387 transitions. [2021-06-05 18:11:12,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 20.23076923076923) internal successors, (263), 13 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:12,731 INFO L276 IsEmpty]: Start isEmpty. Operand 19964 states and 52387 transitions. [2021-06-05 18:11:12,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-06-05 18:11:12,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:12,751 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:12,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:12,953 INFO L430 AbstractCegarLoop]: === Iteration 18 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:12,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1046159806, now seen corresponding path program 3 times [2021-06-05 18:11:12,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:12,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725975152] [2021-06-05 18:11:12,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 242 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-06-05 18:11:13,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:13,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725975152] [2021-06-05 18:11:13,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725975152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:13,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936443466] [2021-06-05 18:11:13,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:13,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 18:11:13,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:13,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:11:13,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-06-05 18:11:13,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936443466] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:11:13,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 18:11:13,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-06-05 18:11:13,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923842674] [2021-06-05 18:11:13,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:11:13,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:13,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:11:13,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:11:13,591 INFO L87 Difference]: Start difference. First operand 19964 states and 52387 transitions. Second operand has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:13,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:13,787 INFO L93 Difference]: Finished difference Result 26914 states and 70438 transitions. [2021-06-05 18:11:13,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 18:11:13,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2021-06-05 18:11:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:13,832 INFO L225 Difference]: With dead ends: 26914 [2021-06-05 18:11:13,832 INFO L226 Difference]: Without dead ends: 26914 [2021-06-05 18:11:13,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:11:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26914 states. [2021-06-05 18:11:14,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26914 to 20644. [2021-06-05 18:11:14,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20644 states, 20642 states have (on average 2.627700804185641) internal successors, (54241), 20643 states have internal predecessors, (54241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20644 states to 20644 states and 54241 transitions. [2021-06-05 18:11:14,160 INFO L78 Accepts]: Start accepts. Automaton has 20644 states and 54241 transitions. Word has length 254 [2021-06-05 18:11:14,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:14,160 INFO L482 AbstractCegarLoop]: Abstraction has 20644 states and 54241 transitions. [2021-06-05 18:11:14,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:14,160 INFO L276 IsEmpty]: Start isEmpty. Operand 20644 states and 54241 transitions. [2021-06-05 18:11:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-06-05 18:11:14,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:14,181 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:14,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 18:11:14,385 INFO L430 AbstractCegarLoop]: === Iteration 19 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:14,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:14,385 INFO L82 PathProgramCache]: Analyzing trace with hash -518142441, now seen corresponding path program 6 times [2021-06-05 18:11:14,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:14,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824744892] [2021-06-05 18:11:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:14,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:14,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824744892] [2021-06-05 18:11:14,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824744892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:14,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654761436] [2021-06-05 18:11:14,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:14,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:11:14,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:14,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:11:14,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:15,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654761436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:15,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:15,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:11:15,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369359800] [2021-06-05 18:11:15,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:11:15,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:15,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:11:15,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:11:15,168 INFO L87 Difference]: Start difference. First operand 20644 states and 54241 transitions. Second operand has 17 states, 17 states have (on average 17.941176470588236) internal successors, (305), 17 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:15,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:15,468 INFO L93 Difference]: Finished difference Result 27943 states and 72966 transitions. [2021-06-05 18:11:15,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:11:15,468 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 17.941176470588236) internal successors, (305), 17 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2021-06-05 18:11:15,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:15,500 INFO L225 Difference]: With dead ends: 27943 [2021-06-05 18:11:15,500 INFO L226 Difference]: Without dead ends: 27943 [2021-06-05 18:11:15,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=316, Invalid=614, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:11:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27943 states. [2021-06-05 18:11:15,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27943 to 22446. [2021-06-05 18:11:15,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22446 states, 22444 states have (on average 2.62212618071645) internal successors, (58851), 22445 states have internal predecessors, (58851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22446 states to 22446 states and 58851 transitions. [2021-06-05 18:11:15,845 INFO L78 Accepts]: Start accepts. Automaton has 22446 states and 58851 transitions. Word has length 258 [2021-06-05 18:11:15,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:15,845 INFO L482 AbstractCegarLoop]: Abstraction has 22446 states and 58851 transitions. [2021-06-05 18:11:15,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 17.941176470588236) internal successors, (305), 17 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 22446 states and 58851 transitions. [2021-06-05 18:11:15,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-06-05 18:11:15,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:15,867 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:16,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:16,068 INFO L430 AbstractCegarLoop]: === Iteration 20 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:16,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:16,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1149446897, now seen corresponding path program 8 times [2021-06-05 18:11:16,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:16,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448448381] [2021-06-05 18:11:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 404 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:11:16,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:16,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448448381] [2021-06-05 18:11:16,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448448381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:16,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556771966] [2021-06-05 18:11:16,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:16,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:11:16,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:16,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:11:16,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:16,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556771966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:16,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:16,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 18:11:16,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740222638] [2021-06-05 18:11:16,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:11:16,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:16,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:11:16,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:11:16,697 INFO L87 Difference]: Start difference. First operand 22446 states and 58851 transitions. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:16,953 INFO L93 Difference]: Finished difference Result 29176 states and 76036 transitions. [2021-06-05 18:11:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:11:16,953 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-06-05 18:11:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:16,987 INFO L225 Difference]: With dead ends: 29176 [2021-06-05 18:11:16,987 INFO L226 Difference]: Without dead ends: 29176 [2021-06-05 18:11:16,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:11:17,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29176 states. [2021-06-05 18:11:17,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29176 to 23126. [2021-06-05 18:11:17,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23126 states, 23124 states have (on average 2.626751427088739) internal successors, (60741), 23125 states have internal predecessors, (60741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23126 states to 23126 states and 60741 transitions. [2021-06-05 18:11:17,291 INFO L78 Accepts]: Start accepts. Automaton has 23126 states and 60741 transitions. Word has length 259 [2021-06-05 18:11:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:17,291 INFO L482 AbstractCegarLoop]: Abstraction has 23126 states and 60741 transitions. [2021-06-05 18:11:17,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:17,292 INFO L276 IsEmpty]: Start isEmpty. Operand 23126 states and 60741 transitions. [2021-06-05 18:11:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-06-05 18:11:17,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:17,313 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:17,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:17,514 INFO L430 AbstractCegarLoop]: === Iteration 21 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:17,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:17,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1682508145, now seen corresponding path program 9 times [2021-06-05 18:11:17,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:17,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034946966] [2021-06-05 18:11:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:17,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:17,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034946966] [2021-06-05 18:11:17,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034946966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:17,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932693348] [2021-06-05 18:11:17,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:17,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:11:17,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:17,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:11:17,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:18,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932693348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:18,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:18,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:11:18,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513322071] [2021-06-05 18:11:18,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:11:18,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:18,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:11:18,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:11:18,218 INFO L87 Difference]: Start difference. First operand 23126 states and 60741 transitions. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:18,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:18,485 INFO L93 Difference]: Finished difference Result 34101 states and 89002 transitions. [2021-06-05 18:11:18,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:11:18,486 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-06-05 18:11:18,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:18,526 INFO L225 Difference]: With dead ends: 34101 [2021-06-05 18:11:18,526 INFO L226 Difference]: Without dead ends: 34101 [2021-06-05 18:11:18,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:11:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34101 states. [2021-06-05 18:11:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34101 to 25066. [2021-06-05 18:11:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25066 states, 25064 states have (on average 2.6364506862432173) internal successors, (66080), 25065 states have internal predecessors, (66080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25066 states to 25066 states and 66080 transitions. [2021-06-05 18:11:18,982 INFO L78 Accepts]: Start accepts. Automaton has 25066 states and 66080 transitions. Word has length 259 [2021-06-05 18:11:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:18,982 INFO L482 AbstractCegarLoop]: Abstraction has 25066 states and 66080 transitions. [2021-06-05 18:11:18,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:18,983 INFO L276 IsEmpty]: Start isEmpty. Operand 25066 states and 66080 transitions. [2021-06-05 18:11:19,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-06-05 18:11:19,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:19,005 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:19,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 18:11:19,221 INFO L430 AbstractCegarLoop]: === Iteration 22 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:19,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:19,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1405684141, now seen corresponding path program 10 times [2021-06-05 18:11:19,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:19,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029627185] [2021-06-05 18:11:19,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:19,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:19,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029627185] [2021-06-05 18:11:19,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029627185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:19,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994455399] [2021-06-05 18:11:19,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:19,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:11:19,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:19,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:11:19,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:19,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994455399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:19,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:19,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:11:19,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551746137] [2021-06-05 18:11:19,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:11:19,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:19,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:11:19,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:11:19,907 INFO L87 Difference]: Start difference. First operand 25066 states and 66080 transitions. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:20,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:20,228 INFO L93 Difference]: Finished difference Result 34341 states and 90071 transitions. [2021-06-05 18:11:20,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:11:20,229 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-06-05 18:11:20,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:20,266 INFO L225 Difference]: With dead ends: 34341 [2021-06-05 18:11:20,266 INFO L226 Difference]: Without dead ends: 34341 [2021-06-05 18:11:20,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:11:20,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34341 states. [2021-06-05 18:11:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34341 to 26326. [2021-06-05 18:11:20,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26326 states, 26324 states have (on average 2.641277921288558) internal successors, (69529), 26325 states have internal predecessors, (69529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26326 states to 26326 states and 69529 transitions. [2021-06-05 18:11:20,638 INFO L78 Accepts]: Start accepts. Automaton has 26326 states and 69529 transitions. Word has length 259 [2021-06-05 18:11:20,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:20,638 INFO L482 AbstractCegarLoop]: Abstraction has 26326 states and 69529 transitions. [2021-06-05 18:11:20,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:20,638 INFO L276 IsEmpty]: Start isEmpty. Operand 26326 states and 69529 transitions. [2021-06-05 18:11:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-06-05 18:11:20,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:20,666 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:20,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:20,867 INFO L430 AbstractCegarLoop]: === Iteration 23 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:20,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:20,867 INFO L82 PathProgramCache]: Analyzing trace with hash -498296266, now seen corresponding path program 4 times [2021-06-05 18:11:20,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:20,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482578188] [2021-06-05 18:11:20,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 51 proven. 219 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-06-05 18:11:20,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:20,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482578188] [2021-06-05 18:11:20,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482578188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:20,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051506598] [2021-06-05 18:11:20,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:21,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:11:21,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:21,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:11:21,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 51 proven. 219 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-06-05 18:11:21,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051506598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:21,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:21,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:11:21,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599946481] [2021-06-05 18:11:21,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:11:21,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:21,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:11:21,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:11:21,562 INFO L87 Difference]: Start difference. First operand 26326 states and 69529 transitions. Second operand has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:21,821 INFO L93 Difference]: Finished difference Result 41691 states and 109020 transitions. [2021-06-05 18:11:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:11:21,821 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 283 [2021-06-05 18:11:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:21,868 INFO L225 Difference]: With dead ends: 41691 [2021-06-05 18:11:21,868 INFO L226 Difference]: Without dead ends: 41691 [2021-06-05 18:11:21,869 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:11:21,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41691 states. [2021-06-05 18:11:22,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41691 to 29426. [2021-06-05 18:11:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29426 states, 29424 states have (on average 2.6516449157150626) internal successors, (78022), 29425 states have internal predecessors, (78022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29426 states to 29426 states and 78022 transitions. [2021-06-05 18:11:22,312 INFO L78 Accepts]: Start accepts. Automaton has 29426 states and 78022 transitions. Word has length 283 [2021-06-05 18:11:22,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:22,312 INFO L482 AbstractCegarLoop]: Abstraction has 29426 states and 78022 transitions. [2021-06-05 18:11:22,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:22,313 INFO L276 IsEmpty]: Start isEmpty. Operand 29426 states and 78022 transitions. [2021-06-05 18:11:22,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-06-05 18:11:22,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:22,343 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:22,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 18:11:22,544 INFO L430 AbstractCegarLoop]: === Iteration 24 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:22,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:22,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1969215169, now seen corresponding path program 5 times [2021-06-05 18:11:22,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:22,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828721549] [2021-06-05 18:11:22,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 15 proven. 396 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:11:22,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:22,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828721549] [2021-06-05 18:11:22,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828721549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:22,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093241570] [2021-06-05 18:11:22,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:22,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:11:22,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:22,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:11:22,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 15 proven. 372 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:11:23,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093241570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:23,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:23,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 18:11:23,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432990361] [2021-06-05 18:11:23,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:11:23,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:23,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:11:23,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:11:23,260 INFO L87 Difference]: Start difference. First operand 29426 states and 78022 transitions. Second operand has 13 states, 13 states have (on average 21.23076923076923) internal successors, (276), 13 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:23,543 INFO L93 Difference]: Finished difference Result 39436 states and 103060 transitions. [2021-06-05 18:11:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:11:23,543 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.23076923076923) internal successors, (276), 13 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2021-06-05 18:11:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:23,587 INFO L225 Difference]: With dead ends: 39436 [2021-06-05 18:11:23,587 INFO L226 Difference]: Without dead ends: 39436 [2021-06-05 18:11:23,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:11:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39436 states. [2021-06-05 18:11:23,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39436 to 27486. [2021-06-05 18:11:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27486 states, 27484 states have (on average 2.6445568330665115) internal successors, (72683), 27485 states have internal predecessors, (72683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27486 states to 27486 states and 72683 transitions. [2021-06-05 18:11:23,981 INFO L78 Accepts]: Start accepts. Automaton has 27486 states and 72683 transitions. Word has length 288 [2021-06-05 18:11:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:23,981 INFO L482 AbstractCegarLoop]: Abstraction has 27486 states and 72683 transitions. [2021-06-05 18:11:23,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 21.23076923076923) internal successors, (276), 13 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:23,982 INFO L276 IsEmpty]: Start isEmpty. Operand 27486 states and 72683 transitions. [2021-06-05 18:11:24,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-06-05 18:11:24,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:24,011 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:24,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 18:11:24,213 INFO L430 AbstractCegarLoop]: === Iteration 25 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:24,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:24,213 INFO L82 PathProgramCache]: Analyzing trace with hash 31545707, now seen corresponding path program 6 times [2021-06-05 18:11:24,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:24,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849783606] [2021-06-05 18:11:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 54 proven. 388 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:11:24,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:24,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849783606] [2021-06-05 18:11:24,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849783606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:24,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365877923] [2021-06-05 18:11:24,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:24,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:11:24,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:24,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:11:24,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 250 proven. 59 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-06-05 18:11:24,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365877923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:24,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:24,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-06-05 18:11:24,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829385135] [2021-06-05 18:11:24,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:11:24,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:24,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:11:24,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:11:24,993 INFO L87 Difference]: Start difference. First operand 27486 states and 72683 transitions. Second operand has 22 states, 22 states have (on average 21.136363636363637) internal successors, (465), 22 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:25,652 INFO L93 Difference]: Finished difference Result 56766 states and 149064 transitions. [2021-06-05 18:11:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:11:25,653 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 21.136363636363637) internal successors, (465), 22 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2021-06-05 18:11:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:25,730 INFO L225 Difference]: With dead ends: 56766 [2021-06-05 18:11:25,731 INFO L226 Difference]: Without dead ends: 56766 [2021-06-05 18:11:25,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 485.2ms TimeCoverageRelationStatistics Valid=623, Invalid=2029, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:11:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56766 states. [2021-06-05 18:11:26,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56766 to 30626. [2021-06-05 18:11:26,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30626 states, 30624 states have (on average 2.658894984326019) internal successors, (81426), 30625 states have internal predecessors, (81426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:26,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30626 states to 30626 states and 81426 transitions. [2021-06-05 18:11:26,348 INFO L78 Accepts]: Start accepts. Automaton has 30626 states and 81426 transitions. Word has length 288 [2021-06-05 18:11:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:26,348 INFO L482 AbstractCegarLoop]: Abstraction has 30626 states and 81426 transitions. [2021-06-05 18:11:26,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 21.136363636363637) internal successors, (465), 22 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:26,349 INFO L276 IsEmpty]: Start isEmpty. Operand 30626 states and 81426 transitions. [2021-06-05 18:11:26,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-06-05 18:11:26,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:26,382 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:26,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:26,583 INFO L430 AbstractCegarLoop]: === Iteration 26 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:26,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:26,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1883498472, now seen corresponding path program 7 times [2021-06-05 18:11:26,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:26,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21666139] [2021-06-05 18:11:26,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:26,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:26,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21666139] [2021-06-05 18:11:26,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21666139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:26,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289478082] [2021-06-05 18:11:26,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:26,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:11:26,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:27,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289478082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:27,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:27,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:11:27,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753999183] [2021-06-05 18:11:27,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:11:27,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:27,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:11:27,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:11:27,290 INFO L87 Difference]: Start difference. First operand 30626 states and 81426 transitions. Second operand has 19 states, 19 states have (on average 17.842105263157894) internal successors, (339), 19 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:27,613 INFO L93 Difference]: Finished difference Result 39095 states and 103168 transitions. [2021-06-05 18:11:27,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:11:27,613 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 17.842105263157894) internal successors, (339), 19 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2021-06-05 18:11:27,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:27,658 INFO L225 Difference]: With dead ends: 39095 [2021-06-05 18:11:27,658 INFO L226 Difference]: Without dead ends: 39095 [2021-06-05 18:11:27,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 231.4ms TimeCoverageRelationStatistics Valid=401, Invalid=789, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:11:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39095 states. [2021-06-05 18:11:28,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39095 to 33108. [2021-06-05 18:11:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33108 states, 33106 states have (on average 2.6558931915664834) internal successors, (87926), 33107 states have internal predecessors, (87926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:28,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33108 states to 33108 states and 87926 transitions. [2021-06-05 18:11:28,127 INFO L78 Accepts]: Start accepts. Automaton has 33108 states and 87926 transitions. Word has length 292 [2021-06-05 18:11:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:28,127 INFO L482 AbstractCegarLoop]: Abstraction has 33108 states and 87926 transitions. [2021-06-05 18:11:28,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 17.842105263157894) internal successors, (339), 19 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 33108 states and 87926 transitions. [2021-06-05 18:11:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-06-05 18:11:28,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:28,160 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:28,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 18:11:28,360 INFO L430 AbstractCegarLoop]: === Iteration 27 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:28,361 INFO L82 PathProgramCache]: Analyzing trace with hash 425444978, now seen corresponding path program 11 times [2021-06-05 18:11:28,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:28,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301921281] [2021-06-05 18:11:28,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 589 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:11:28,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:28,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301921281] [2021-06-05 18:11:28,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301921281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:28,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310904809] [2021-06-05 18:11:28,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:28,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:11:28,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:28,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:11:28,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:29,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310904809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:29,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:29,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:11:29,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850631024] [2021-06-05 18:11:29,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:11:29,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:29,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:11:29,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:11:29,009 INFO L87 Difference]: Start difference. First operand 33108 states and 87926 transitions. Second operand has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:29,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:29,311 INFO L93 Difference]: Finished difference Result 41038 states and 107978 transitions. [2021-06-05 18:11:29,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:11:29,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-06-05 18:11:29,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:29,358 INFO L225 Difference]: With dead ends: 41038 [2021-06-05 18:11:29,358 INFO L226 Difference]: Without dead ends: 41038 [2021-06-05 18:11:29,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:11:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41038 states. [2021-06-05 18:11:29,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41038 to 33108. [2021-06-05 18:11:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33108 states, 33106 states have (on average 2.6558931915664834) internal successors, (87926), 33107 states have internal predecessors, (87926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33108 states to 33108 states and 87926 transitions. [2021-06-05 18:11:29,832 INFO L78 Accepts]: Start accepts. Automaton has 33108 states and 87926 transitions. Word has length 293 [2021-06-05 18:11:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:29,833 INFO L482 AbstractCegarLoop]: Abstraction has 33108 states and 87926 transitions. [2021-06-05 18:11:29,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:29,833 INFO L276 IsEmpty]: Start isEmpty. Operand 33108 states and 87926 transitions. [2021-06-05 18:11:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-06-05 18:11:29,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:29,865 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:30,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:30,066 INFO L430 AbstractCegarLoop]: === Iteration 28 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:30,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:30,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1034103440, now seen corresponding path program 12 times [2021-06-05 18:11:30,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:30,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508364210] [2021-06-05 18:11:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:30,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:30,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508364210] [2021-06-05 18:11:30,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508364210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:30,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023999052] [2021-06-05 18:11:30,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:30,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:11:30,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:30,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:11:30,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:30,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023999052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:30,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:30,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:11:30,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451565292] [2021-06-05 18:11:30,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:11:30,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:30,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:11:30,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:11:30,923 INFO L87 Difference]: Start difference. First operand 33108 states and 87926 transitions. Second operand has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:31,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:31,220 INFO L93 Difference]: Finished difference Result 46473 states and 122134 transitions. [2021-06-05 18:11:31,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:11:31,221 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-06-05 18:11:31,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:31,279 INFO L225 Difference]: With dead ends: 46473 [2021-06-05 18:11:31,279 INFO L226 Difference]: Without dead ends: 46473 [2021-06-05 18:11:31,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:11:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46473 states. [2021-06-05 18:11:31,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46473 to 34368. [2021-06-05 18:11:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34368 states, 34366 states have (on average 2.6588779607751847) internal successors, (91375), 34367 states have internal predecessors, (91375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34368 states to 34368 states and 91375 transitions. [2021-06-05 18:11:32,007 INFO L78 Accepts]: Start accepts. Automaton has 34368 states and 91375 transitions. Word has length 293 [2021-06-05 18:11:32,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:32,008 INFO L482 AbstractCegarLoop]: Abstraction has 34368 states and 91375 transitions. [2021-06-05 18:11:32,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:32,008 INFO L276 IsEmpty]: Start isEmpty. Operand 34368 states and 91375 transitions. [2021-06-05 18:11:32,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-06-05 18:11:32,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:32,041 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:32,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 18:11:32,241 INFO L430 AbstractCegarLoop]: === Iteration 29 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:32,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:32,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1797851602, now seen corresponding path program 13 times [2021-06-05 18:11:32,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:32,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715290599] [2021-06-05 18:11:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:32,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:32,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715290599] [2021-06-05 18:11:32,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715290599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:32,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082537075] [2021-06-05 18:11:32,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:32,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:11:32,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:32,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082537075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:32,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:32,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:11:32,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009951192] [2021-06-05 18:11:32,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:11:32,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:32,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:11:32,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:11:32,834 INFO L87 Difference]: Start difference. First operand 34368 states and 91375 transitions. Second operand has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:33,154 INFO L93 Difference]: Finished difference Result 46513 states and 122653 transitions. [2021-06-05 18:11:33,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:11:33,155 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-06-05 18:11:33,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:33,205 INFO L225 Difference]: With dead ends: 46513 [2021-06-05 18:11:33,205 INFO L226 Difference]: Without dead ends: 46513 [2021-06-05 18:11:33,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 180.4ms TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:11:33,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46513 states. [2021-06-05 18:11:33,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46513 to 36308. [2021-06-05 18:11:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36308 states, 36306 states have (on average 2.6638572136836887) internal successors, (96714), 36307 states have internal predecessors, (96714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36308 states to 36308 states and 96714 transitions. [2021-06-05 18:11:33,969 INFO L78 Accepts]: Start accepts. Automaton has 36308 states and 96714 transitions. Word has length 293 [2021-06-05 18:11:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:33,970 INFO L482 AbstractCegarLoop]: Abstraction has 36308 states and 96714 transitions. [2021-06-05 18:11:33,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand 36308 states and 96714 transitions. [2021-06-05 18:11:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-06-05 18:11:34,017 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:34,017 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:34,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 18:11:34,218 INFO L430 AbstractCegarLoop]: === Iteration 30 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:34,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:34,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1019457856, now seen corresponding path program 7 times [2021-06-05 18:11:34,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:34,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620398480] [2021-06-05 18:11:34,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 581 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:11:34,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:34,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620398480] [2021-06-05 18:11:34,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620398480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:34,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68749280] [2021-06-05 18:11:34,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:34,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:34,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 557 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:11:34,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68749280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:34,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:34,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 18:11:34,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052961577] [2021-06-05 18:11:34,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:11:34,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:34,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:11:34,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:11:34,999 INFO L87 Difference]: Start difference. First operand 36308 states and 96714 transitions. Second operand has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:35,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:35,452 INFO L93 Difference]: Finished difference Result 50953 states and 133764 transitions. [2021-06-05 18:11:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:11:35,452 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2021-06-05 18:11:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:35,514 INFO L225 Difference]: With dead ends: 50953 [2021-06-05 18:11:35,515 INFO L226 Difference]: Without dead ends: 50953 [2021-06-05 18:11:35,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:11:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50953 states. [2021-06-05 18:11:36,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50953 to 34368. [2021-06-05 18:11:36,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34368 states, 34366 states have (on average 2.6588779607751847) internal successors, (91375), 34367 states have internal predecessors, (91375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:36,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34368 states to 34368 states and 91375 transitions. [2021-06-05 18:11:36,106 INFO L78 Accepts]: Start accepts. Automaton has 34368 states and 91375 transitions. Word has length 322 [2021-06-05 18:11:36,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:36,106 INFO L482 AbstractCegarLoop]: Abstraction has 34368 states and 91375 transitions. [2021-06-05 18:11:36,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 34368 states and 91375 transitions. [2021-06-05 18:11:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-06-05 18:11:36,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:36,141 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:36,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:36,341 INFO L430 AbstractCegarLoop]: === Iteration 31 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:36,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:36,341 INFO L82 PathProgramCache]: Analyzing trace with hash -187317154, now seen corresponding path program 8 times [2021-06-05 18:11:36,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:36,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104453755] [2021-06-05 18:11:36,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 581 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:11:36,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:36,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104453755] [2021-06-05 18:11:36,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104453755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:36,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769596968] [2021-06-05 18:11:36,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:36,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:11:36,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:36,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:36,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 557 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:11:37,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769596968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:37,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:37,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 18:11:37,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743912611] [2021-06-05 18:11:37,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:11:37,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:37,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:11:37,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:11:37,049 INFO L87 Difference]: Start difference. First operand 34368 states and 91375 transitions. Second operand has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:37,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:37,380 INFO L93 Difference]: Finished difference Result 49438 states and 130087 transitions. [2021-06-05 18:11:37,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:11:37,381 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2021-06-05 18:11:37,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:37,442 INFO L225 Difference]: With dead ends: 49438 [2021-06-05 18:11:37,442 INFO L226 Difference]: Without dead ends: 49438 [2021-06-05 18:11:37,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:11:37,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49438 states. [2021-06-05 18:11:38,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49438 to 34368. [2021-06-05 18:11:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34368 states, 34366 states have (on average 2.6588779607751847) internal successors, (91375), 34367 states have internal predecessors, (91375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34368 states to 34368 states and 91375 transitions. [2021-06-05 18:11:38,300 INFO L78 Accepts]: Start accepts. Automaton has 34368 states and 91375 transitions. Word has length 322 [2021-06-05 18:11:38,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:38,300 INFO L482 AbstractCegarLoop]: Abstraction has 34368 states and 91375 transitions. [2021-06-05 18:11:38,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:38,300 INFO L276 IsEmpty]: Start isEmpty. Operand 34368 states and 91375 transitions. [2021-06-05 18:11:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-06-05 18:11:38,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:38,336 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:38,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:38,541 INFO L430 AbstractCegarLoop]: === Iteration 32 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:38,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:38,541 INFO L82 PathProgramCache]: Analyzing trace with hash -298844420, now seen corresponding path program 9 times [2021-06-05 18:11:38,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:38,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347104886] [2021-06-05 18:11:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 581 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:11:38,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:38,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347104886] [2021-06-05 18:11:38,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347104886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:38,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824311155] [2021-06-05 18:11:38,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:38,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:11:38,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:38,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:38,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 557 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:11:39,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824311155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:39,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:39,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 18:11:39,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061788102] [2021-06-05 18:11:39,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:11:39,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:39,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:11:39,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:11:39,466 INFO L87 Difference]: Start difference. First operand 34368 states and 91375 transitions. Second operand has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:39,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:39,794 INFO L93 Difference]: Finished difference Result 54048 states and 142592 transitions. [2021-06-05 18:11:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:11:39,794 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2021-06-05 18:11:39,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:39,863 INFO L225 Difference]: With dead ends: 54048 [2021-06-05 18:11:39,863 INFO L226 Difference]: Without dead ends: 54048 [2021-06-05 18:11:39,864 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:11:39,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54048 states. [2021-06-05 18:11:40,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54048 to 36308. [2021-06-05 18:11:40,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36308 states, 36306 states have (on average 2.6638572136836887) internal successors, (96714), 36307 states have internal predecessors, (96714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:40,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36308 states to 36308 states and 96714 transitions. [2021-06-05 18:11:40,616 INFO L78 Accepts]: Start accepts. Automaton has 36308 states and 96714 transitions. Word has length 322 [2021-06-05 18:11:40,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:40,616 INFO L482 AbstractCegarLoop]: Abstraction has 36308 states and 96714 transitions. [2021-06-05 18:11:40,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:40,617 INFO L276 IsEmpty]: Start isEmpty. Operand 36308 states and 96714 transitions. [2021-06-05 18:11:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-06-05 18:11:40,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:40,656 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:40,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 18:11:40,865 INFO L430 AbstractCegarLoop]: === Iteration 33 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:40,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:40,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1678975488, now seen corresponding path program 10 times [2021-06-05 18:11:40,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:40,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795682157] [2021-06-05 18:11:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:11:40,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:40,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795682157] [2021-06-05 18:11:40,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795682157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:40,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738566375] [2021-06-05 18:11:40,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:41,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:11:41,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:41,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:41,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:11:41,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738566375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:41,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:41,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:11:41,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351242702] [2021-06-05 18:11:41,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:11:41,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:41,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:11:41,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:11:41,774 INFO L87 Difference]: Start difference. First operand 36308 states and 96714 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:42,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:42,109 INFO L93 Difference]: Finished difference Result 54193 states and 142578 transitions. [2021-06-05 18:11:42,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:11:42,109 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2021-06-05 18:11:42,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:42,179 INFO L225 Difference]: With dead ends: 54193 [2021-06-05 18:11:42,179 INFO L226 Difference]: Without dead ends: 54193 [2021-06-05 18:11:42,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 166.5ms TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:11:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54193 states. [2021-06-05 18:11:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54193 to 39408. [2021-06-05 18:11:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39408 states, 39406 states have (on average 2.6698218545399177) internal successors, (105207), 39407 states have internal predecessors, (105207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39408 states to 39408 states and 105207 transitions. [2021-06-05 18:11:43,008 INFO L78 Accepts]: Start accepts. Automaton has 39408 states and 105207 transitions. Word has length 322 [2021-06-05 18:11:43,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:43,008 INFO L482 AbstractCegarLoop]: Abstraction has 39408 states and 105207 transitions. [2021-06-05 18:11:43,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:43,008 INFO L276 IsEmpty]: Start isEmpty. Operand 39408 states and 105207 transitions. [2021-06-05 18:11:43,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-06-05 18:11:43,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:43,047 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:43,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:43,247 INFO L430 AbstractCegarLoop]: === Iteration 34 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:43,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1567448222, now seen corresponding path program 11 times [2021-06-05 18:11:43,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:43,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730581747] [2021-06-05 18:11:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:11:43,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:43,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730581747] [2021-06-05 18:11:43,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730581747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:43,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135819711] [2021-06-05 18:11:43,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:43,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:11:43,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:43,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:43,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:11:44,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135819711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:44,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:44,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:11:44,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120013103] [2021-06-05 18:11:44,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:11:44,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:44,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:11:44,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:11:44,266 INFO L87 Difference]: Start difference. First operand 39408 states and 105207 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:44,595 INFO L93 Difference]: Finished difference Result 65138 states and 172813 transitions. [2021-06-05 18:11:44,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:11:44,595 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2021-06-05 18:11:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:44,680 INFO L225 Difference]: With dead ends: 65138 [2021-06-05 18:11:44,680 INFO L226 Difference]: Without dead ends: 65138 [2021-06-05 18:11:44,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:11:44,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65138 states. [2021-06-05 18:11:45,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65138 to 41348. [2021-06-05 18:11:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41348 states, 41346 states have (on average 2.6736806462535676) internal successors, (110546), 41347 states have internal predecessors, (110546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41348 states to 41348 states and 110546 transitions. [2021-06-05 18:11:45,595 INFO L78 Accepts]: Start accepts. Automaton has 41348 states and 110546 transitions. Word has length 322 [2021-06-05 18:11:45,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:45,596 INFO L482 AbstractCegarLoop]: Abstraction has 41348 states and 110546 transitions. [2021-06-05 18:11:45,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:45,596 INFO L276 IsEmpty]: Start isEmpty. Operand 41348 states and 110546 transitions. [2021-06-05 18:11:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-06-05 18:11:45,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:45,637 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:45,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 18:11:45,837 INFO L430 AbstractCegarLoop]: === Iteration 35 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:45,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:45,838 INFO L82 PathProgramCache]: Analyzing trace with hash -350311975, now seen corresponding path program 8 times [2021-06-05 18:11:45,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:45,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754043849] [2021-06-05 18:11:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:46,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:46,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754043849] [2021-06-05 18:11:46,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754043849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:46,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908086815] [2021-06-05 18:11:46,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:46,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:11:46,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:46,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:46,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:46,467 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:11:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:46,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908086815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:46,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:46,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:11:46,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096158694] [2021-06-05 18:11:46,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:11:46,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:46,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:11:46,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:11:46,801 INFO L87 Difference]: Start difference. First operand 41348 states and 110546 transitions. Second operand has 21 states, 21 states have (on average 17.761904761904763) internal successors, (373), 21 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:47,215 INFO L93 Difference]: Finished difference Result 50527 states and 134028 transitions. [2021-06-05 18:11:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:11:47,215 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 17.761904761904763) internal successors, (373), 21 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 326 [2021-06-05 18:11:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:47,280 INFO L225 Difference]: With dead ends: 50527 [2021-06-05 18:11:47,280 INFO L226 Difference]: Without dead ends: 50527 [2021-06-05 18:11:47,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=496, Invalid=986, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:11:47,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50527 states. [2021-06-05 18:11:47,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50527 to 43150. [2021-06-05 18:11:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43150 states, 43148 states have (on average 2.668860665616019) internal successors, (115156), 43149 states have internal predecessors, (115156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43150 states to 43150 states and 115156 transitions. [2021-06-05 18:11:48,082 INFO L78 Accepts]: Start accepts. Automaton has 43150 states and 115156 transitions. Word has length 326 [2021-06-05 18:11:48,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:48,082 INFO L482 AbstractCegarLoop]: Abstraction has 43150 states and 115156 transitions. [2021-06-05 18:11:48,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 17.761904761904763) internal successors, (373), 21 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:48,083 INFO L276 IsEmpty]: Start isEmpty. Operand 43150 states and 115156 transitions. [2021-06-05 18:11:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-06-05 18:11:48,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:48,130 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:48,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 18:11:48,332 INFO L430 AbstractCegarLoop]: === Iteration 36 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:48,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:48,332 INFO L82 PathProgramCache]: Analyzing trace with hash -947502669, now seen corresponding path program 14 times [2021-06-05 18:11:48,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:48,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830473212] [2021-06-05 18:11:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:11:48,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:48,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830473212] [2021-06-05 18:11:48,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830473212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:48,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191577088] [2021-06-05 18:11:48,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:48,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:11:48,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:48,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:48,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:49,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191577088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:49,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:49,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:11:49,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607680278] [2021-06-05 18:11:49,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:11:49,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:49,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:11:49,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:11:49,060 INFO L87 Difference]: Start difference. First operand 43150 states and 115156 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:49,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:49,563 INFO L93 Difference]: Finished difference Result 53420 states and 141238 transitions. [2021-06-05 18:11:49,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:11:49,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-06-05 18:11:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:49,629 INFO L225 Difference]: With dead ends: 53420 [2021-06-05 18:11:49,629 INFO L226 Difference]: Without dead ends: 53420 [2021-06-05 18:11:49,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 365.5ms TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:11:49,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53420 states. [2021-06-05 18:11:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53420 to 43830. [2021-06-05 18:11:50,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43830 states, 43828 states have (on average 2.6705758875604637) internal successors, (117046), 43829 states have internal predecessors, (117046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:50,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43830 states to 43830 states and 117046 transitions. [2021-06-05 18:11:50,331 INFO L78 Accepts]: Start accepts. Automaton has 43830 states and 117046 transitions. Word has length 327 [2021-06-05 18:11:50,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:50,332 INFO L482 AbstractCegarLoop]: Abstraction has 43830 states and 117046 transitions. [2021-06-05 18:11:50,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:50,332 INFO L276 IsEmpty]: Start isEmpty. Operand 43830 states and 117046 transitions. [2021-06-05 18:11:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-06-05 18:11:50,375 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:50,375 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:50,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 18:11:50,585 INFO L430 AbstractCegarLoop]: === Iteration 37 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:50,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:50,585 INFO L82 PathProgramCache]: Analyzing trace with hash -765780399, now seen corresponding path program 15 times [2021-06-05 18:11:50,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:50,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374321153] [2021-06-05 18:11:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:50,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:50,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374321153] [2021-06-05 18:11:50,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374321153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:50,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951716227] [2021-06-05 18:11:50,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:51,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:11:51,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:51,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:51,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:51,327 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:11:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:51,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951716227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:51,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:51,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:11:51,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137799797] [2021-06-05 18:11:51,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:11:51,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:51,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:11:51,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:11:51,644 INFO L87 Difference]: Start difference. First operand 43830 states and 117046 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:52,016 INFO L93 Difference]: Finished difference Result 57625 states and 151795 transitions. [2021-06-05 18:11:52,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:11:52,017 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-06-05 18:11:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:52,090 INFO L225 Difference]: With dead ends: 57625 [2021-06-05 18:11:52,090 INFO L226 Difference]: Without dead ends: 57625 [2021-06-05 18:11:52,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 223.8ms TimeCoverageRelationStatistics Valid=336, Invalid=786, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:11:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57625 states. [2021-06-05 18:11:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57625 to 43150. [2021-06-05 18:11:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43150 states, 43148 states have (on average 2.668860665616019) internal successors, (115156), 43149 states have internal predecessors, (115156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43150 states to 43150 states and 115156 transitions. [2021-06-05 18:11:52,897 INFO L78 Accepts]: Start accepts. Automaton has 43150 states and 115156 transitions. Word has length 327 [2021-06-05 18:11:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:52,897 INFO L482 AbstractCegarLoop]: Abstraction has 43150 states and 115156 transitions. [2021-06-05 18:11:52,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:52,897 INFO L276 IsEmpty]: Start isEmpty. Operand 43150 states and 115156 transitions. [2021-06-05 18:11:52,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-06-05 18:11:52,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:52,942 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:53,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 18:11:53,143 INFO L430 AbstractCegarLoop]: === Iteration 38 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:53,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:53,143 INFO L82 PathProgramCache]: Analyzing trace with hash -157121937, now seen corresponding path program 16 times [2021-06-05 18:11:53,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:53,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151370994] [2021-06-05 18:11:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:53,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:53,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151370994] [2021-06-05 18:11:53,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151370994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:53,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134846479] [2021-06-05 18:11:53,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:53,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:11:53,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:53,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:53,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:54,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134846479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:54,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:54,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:11:54,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735129322] [2021-06-05 18:11:54,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:11:54,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:54,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:11:54,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:11:54,135 INFO L87 Difference]: Start difference. First operand 43150 states and 115156 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:54,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:54,516 INFO L93 Difference]: Finished difference Result 58745 states and 155304 transitions. [2021-06-05 18:11:54,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:11:54,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-06-05 18:11:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:54,590 INFO L225 Difference]: With dead ends: 58745 [2021-06-05 18:11:54,590 INFO L226 Difference]: Without dead ends: 58745 [2021-06-05 18:11:54,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=345, Invalid=845, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:11:54,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58745 states. [2021-06-05 18:11:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58745 to 45090. [2021-06-05 18:11:55,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45090 states, 45088 states have (on average 2.672440560681334) internal successors, (120495), 45089 states have internal predecessors, (120495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:55,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45090 states to 45090 states and 120495 transitions. [2021-06-05 18:11:55,351 INFO L78 Accepts]: Start accepts. Automaton has 45090 states and 120495 transitions. Word has length 327 [2021-06-05 18:11:55,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:55,351 INFO L482 AbstractCegarLoop]: Abstraction has 45090 states and 120495 transitions. [2021-06-05 18:11:55,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:55,351 INFO L276 IsEmpty]: Start isEmpty. Operand 45090 states and 120495 transitions. [2021-06-05 18:11:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-06-05 18:11:55,393 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:55,393 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:55,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 18:11:55,594 INFO L430 AbstractCegarLoop]: === Iteration 39 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:55,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:55,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1305890317, now seen corresponding path program 17 times [2021-06-05 18:11:55,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:55,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736446589] [2021-06-05 18:11:55,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:55,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:55,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736446589] [2021-06-05 18:11:55,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736446589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:55,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328333744] [2021-06-05 18:11:55,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:56,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:11:56,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:56,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:56,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:56,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328333744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:56,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:56,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:11:56,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15879893] [2021-06-05 18:11:56,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:11:56,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:56,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:11:56,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:11:56,442 INFO L87 Difference]: Start difference. First operand 45090 states and 120495 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:56,925 INFO L93 Difference]: Finished difference Result 64210 states and 169402 transitions. [2021-06-05 18:11:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:11:56,926 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-06-05 18:11:56,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:57,009 INFO L225 Difference]: With dead ends: 64210 [2021-06-05 18:11:57,009 INFO L226 Difference]: Without dead ends: 64210 [2021-06-05 18:11:57,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=354, Invalid=906, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:11:57,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64210 states. [2021-06-05 18:11:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64210 to 48290. [2021-06-05 18:11:57,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48290 states, 48288 states have (on average 2.6773318422796555) internal successors, (129283), 48289 states have internal predecessors, (129283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48290 states to 48290 states and 129283 transitions. [2021-06-05 18:11:57,941 INFO L78 Accepts]: Start accepts. Automaton has 48290 states and 129283 transitions. Word has length 327 [2021-06-05 18:11:57,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:57,941 INFO L482 AbstractCegarLoop]: Abstraction has 48290 states and 129283 transitions. [2021-06-05 18:11:57,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:57,941 INFO L276 IsEmpty]: Start isEmpty. Operand 48290 states and 129283 transitions. [2021-06-05 18:11:58,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-06-05 18:11:58,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:58,147 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:11:58,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 18:11:58,348 INFO L430 AbstractCegarLoop]: === Iteration 40 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:58,348 INFO L82 PathProgramCache]: Analyzing trace with hash 99115307, now seen corresponding path program 18 times [2021-06-05 18:11:58,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:58,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227016405] [2021-06-05 18:11:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:58,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:58,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227016405] [2021-06-05 18:11:58,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227016405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:58,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74733190] [2021-06-05 18:11:58,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:58,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:11:58,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:58,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:58,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:11:59,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74733190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:59,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:59,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:11:59,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497806665] [2021-06-05 18:11:59,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:11:59,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:59,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:11:59,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:11:59,207 INFO L87 Difference]: Start difference. First operand 48290 states and 129283 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:59,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:59,618 INFO L93 Difference]: Finished difference Result 71055 states and 187712 transitions. [2021-06-05 18:11:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:11:59,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-06-05 18:11:59,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:59,705 INFO L225 Difference]: With dead ends: 71055 [2021-06-05 18:11:59,706 INFO L226 Difference]: Without dead ends: 71055 [2021-06-05 18:11:59,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:11:59,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71055 states. [2021-06-05 18:12:00,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71055 to 49550. [2021-06-05 18:12:00,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49550 states, 49548 states have (on average 2.678856866069266) internal successors, (132732), 49549 states have internal predecessors, (132732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49550 states to 49550 states and 132732 transitions. [2021-06-05 18:12:00,832 INFO L78 Accepts]: Start accepts. Automaton has 49550 states and 132732 transitions. Word has length 327 [2021-06-05 18:12:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:00,832 INFO L482 AbstractCegarLoop]: Abstraction has 49550 states and 132732 transitions. [2021-06-05 18:12:00,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:00,832 INFO L276 IsEmpty]: Start isEmpty. Operand 49550 states and 132732 transitions. [2021-06-05 18:12:00,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-06-05 18:12:00,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:00,875 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:01,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 18:12:01,075 INFO L430 AbstractCegarLoop]: === Iteration 41 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:01,076 INFO L82 PathProgramCache]: Analyzing trace with hash -12411959, now seen corresponding path program 19 times [2021-06-05 18:12:01,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:01,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877057131] [2021-06-05 18:12:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:12:01,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:01,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877057131] [2021-06-05 18:12:01,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877057131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:01,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200224972] [2021-06-05 18:12:01,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:01,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:12:01,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:12:01,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200224972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:01,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:01,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:12:01,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449043122] [2021-06-05 18:12:01,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:12:01,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:01,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:12:01,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:12:01,766 INFO L87 Difference]: Start difference. First operand 49550 states and 132732 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:02,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:02,196 INFO L93 Difference]: Finished difference Result 66465 states and 176301 transitions. [2021-06-05 18:12:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:12:02,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-06-05 18:12:02,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:02,282 INFO L225 Difference]: With dead ends: 66465 [2021-06-05 18:12:02,282 INFO L226 Difference]: Without dead ends: 66465 [2021-06-05 18:12:02,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 247.1ms TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:12:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66465 states. [2021-06-05 18:12:03,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66465 to 48190. [2021-06-05 18:12:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48190 states, 48188 states have (on average 2.6760189258736613) internal successors, (128952), 48189 states have internal predecessors, (128952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48190 states to 48190 states and 128952 transitions. [2021-06-05 18:12:03,229 INFO L78 Accepts]: Start accepts. Automaton has 48190 states and 128952 transitions. Word has length 327 [2021-06-05 18:12:03,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:03,230 INFO L482 AbstractCegarLoop]: Abstraction has 48190 states and 128952 transitions. [2021-06-05 18:12:03,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:03,230 INFO L276 IsEmpty]: Start isEmpty. Operand 48190 states and 128952 transitions. [2021-06-05 18:12:03,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-06-05 18:12:03,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:03,425 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:03,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:03,625 INFO L430 AbstractCegarLoop]: === Iteration 42 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:03,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:03,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2010118382, now seen corresponding path program 12 times [2021-06-05 18:12:03,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:03,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539591490] [2021-06-05 18:12:03,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 18 proven. 602 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:12:03,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:03,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539591490] [2021-06-05 18:12:03,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539591490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:03,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878127953] [2021-06-05 18:12:03,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:04,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:12:04,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:04,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:04,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 18 proven. 578 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:12:04,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878127953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:04,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:04,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 18:12:04,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000995834] [2021-06-05 18:12:04,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:12:04,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:04,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:12:04,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:12:04,397 INFO L87 Difference]: Start difference. First operand 48190 states and 128952 transitions. Second operand has 14 states, 14 states have (on average 21.785714285714285) internal successors, (305), 14 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:04,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:04,796 INFO L93 Difference]: Finished difference Result 84430 states and 223303 transitions. [2021-06-05 18:12:04,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:12:04,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 21.785714285714285) internal successors, (305), 14 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 351 [2021-06-05 18:12:04,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:04,896 INFO L225 Difference]: With dead ends: 84430 [2021-06-05 18:12:04,896 INFO L226 Difference]: Without dead ends: 84430 [2021-06-05 18:12:04,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:12:05,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84430 states. [2021-06-05 18:12:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84430 to 57010. [2021-06-05 18:12:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57010 states, 57008 states have (on average 2.6867632612966603) internal successors, (153167), 57009 states have internal predecessors, (153167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57010 states to 57010 states and 153167 transitions. [2021-06-05 18:12:06,146 INFO L78 Accepts]: Start accepts. Automaton has 57010 states and 153167 transitions. Word has length 351 [2021-06-05 18:12:06,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:06,146 INFO L482 AbstractCegarLoop]: Abstraction has 57010 states and 153167 transitions. [2021-06-05 18:12:06,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 21.785714285714285) internal successors, (305), 14 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 57010 states and 153167 transitions. [2021-06-05 18:12:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:12:06,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:06,212 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:06,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:06,412 INFO L430 AbstractCegarLoop]: === Iteration 43 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:06,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:06,413 INFO L82 PathProgramCache]: Analyzing trace with hash 853408001, now seen corresponding path program 13 times [2021-06-05 18:12:06,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:06,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647083722] [2021-06-05 18:12:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:12:06,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:06,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647083722] [2021-06-05 18:12:06,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647083722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:06,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31382416] [2021-06-05 18:12:06,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:06,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:06,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 776 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:12:07,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31382416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:07,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:07,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:12:07,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664613449] [2021-06-05 18:12:07,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:07,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:07,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:07,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:07,108 INFO L87 Difference]: Start difference. First operand 57010 states and 153167 transitions. Second operand has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:07,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:07,726 INFO L93 Difference]: Finished difference Result 75215 states and 199169 transitions. [2021-06-05 18:12:07,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:12:07,727 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-06-05 18:12:07,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:07,816 INFO L225 Difference]: With dead ends: 75215 [2021-06-05 18:12:07,816 INFO L226 Difference]: Without dead ends: 75215 [2021-06-05 18:12:07,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:12:07,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75215 states. [2021-06-05 18:12:08,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75215 to 55070. [2021-06-05 18:12:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55070 states, 55068 states have (on average 2.6844628459359337) internal successors, (147828), 55069 states have internal predecessors, (147828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:08,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55070 states to 55070 states and 147828 transitions. [2021-06-05 18:12:08,992 INFO L78 Accepts]: Start accepts. Automaton has 55070 states and 147828 transitions. Word has length 356 [2021-06-05 18:12:08,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:08,993 INFO L482 AbstractCegarLoop]: Abstraction has 55070 states and 147828 transitions. [2021-06-05 18:12:08,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:08,993 INFO L276 IsEmpty]: Start isEmpty. Operand 55070 states and 147828 transitions. [2021-06-05 18:12:09,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:12:09,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:09,060 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:09,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:09,261 INFO L430 AbstractCegarLoop]: === Iteration 44 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:09,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:09,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1978547041, now seen corresponding path program 14 times [2021-06-05 18:12:09,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:09,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289789067] [2021-06-05 18:12:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:12:09,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:09,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289789067] [2021-06-05 18:12:09,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289789067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:09,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848657481] [2021-06-05 18:12:09,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:09,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:12:09,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:09,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:09,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 776 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:12:10,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848657481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:10,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:10,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:12:10,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035210086] [2021-06-05 18:12:10,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:10,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:10,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:10,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:10,020 INFO L87 Difference]: Start difference. First operand 55070 states and 147828 transitions. Second operand has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:10,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:10,691 INFO L93 Difference]: Finished difference Result 83920 states and 222943 transitions. [2021-06-05 18:12:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:12:10,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-06-05 18:12:10,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:10,804 INFO L225 Difference]: With dead ends: 83920 [2021-06-05 18:12:10,804 INFO L226 Difference]: Without dead ends: 83920 [2021-06-05 18:12:10,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:12:10,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83920 states. [2021-06-05 18:12:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83920 to 56330. [2021-06-05 18:12:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56330 states, 56328 states have (on average 2.6856447947734696) internal successors, (151277), 56329 states have internal predecessors, (151277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:11,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56330 states to 56330 states and 151277 transitions. [2021-06-05 18:12:11,844 INFO L78 Accepts]: Start accepts. Automaton has 56330 states and 151277 transitions. Word has length 356 [2021-06-05 18:12:11,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:11,844 INFO L482 AbstractCegarLoop]: Abstraction has 56330 states and 151277 transitions. [2021-06-05 18:12:11,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:11,845 INFO L276 IsEmpty]: Start isEmpty. Operand 56330 states and 151277 transitions. [2021-06-05 18:12:11,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:12:11,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:11,915 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:12,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 18:12:12,116 INFO L430 AbstractCegarLoop]: === Iteration 45 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:12,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:12,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1109645245, now seen corresponding path program 15 times [2021-06-05 18:12:12,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:12,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363696222] [2021-06-05 18:12:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:12:12,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:12,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363696222] [2021-06-05 18:12:12,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363696222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:12,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441274625] [2021-06-05 18:12:12,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:12,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:12:12,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:12,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:12,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 776 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:12:13,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441274625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:13,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:13,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:12:13,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020265429] [2021-06-05 18:12:13,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:13,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:13,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:13,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:13,022 INFO L87 Difference]: Start difference. First operand 56330 states and 151277 transitions. Second operand has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:13,668 INFO L93 Difference]: Finished difference Result 79860 states and 212857 transitions. [2021-06-05 18:12:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:12:13,669 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-06-05 18:12:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:13,770 INFO L225 Difference]: With dead ends: 79860 [2021-06-05 18:12:13,771 INFO L226 Difference]: Without dead ends: 79860 [2021-06-05 18:12:13,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:12:13,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79860 states. [2021-06-05 18:12:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79860 to 57010. [2021-06-05 18:12:14,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57010 states, 57008 states have (on average 2.6867632612966603) internal successors, (153167), 57009 states have internal predecessors, (153167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:15,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57010 states to 57010 states and 153167 transitions. [2021-06-05 18:12:15,030 INFO L78 Accepts]: Start accepts. Automaton has 57010 states and 153167 transitions. Word has length 356 [2021-06-05 18:12:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:15,030 INFO L482 AbstractCegarLoop]: Abstraction has 57010 states and 153167 transitions. [2021-06-05 18:12:15,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:15,031 INFO L276 IsEmpty]: Start isEmpty. Operand 57010 states and 153167 transitions. [2021-06-05 18:12:15,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:12:15,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:15,098 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:15,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:15,299 INFO L430 AbstractCegarLoop]: === Iteration 46 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:15,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:15,299 INFO L82 PathProgramCache]: Analyzing trace with hash 998117979, now seen corresponding path program 16 times [2021-06-05 18:12:15,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:15,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776788029] [2021-06-05 18:12:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:12:15,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:15,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776788029] [2021-06-05 18:12:15,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776788029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:15,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979547451] [2021-06-05 18:12:15,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:15,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:12:15,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:15,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:15,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 776 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:12:16,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979547451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:16,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:16,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:12:16,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807884732] [2021-06-05 18:12:16,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:16,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:16,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:16,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:16,193 INFO L87 Difference]: Start difference. First operand 57010 states and 153167 transitions. Second operand has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:16,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:16,646 INFO L93 Difference]: Finished difference Result 80745 states and 215054 transitions. [2021-06-05 18:12:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:12:16,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-06-05 18:12:16,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:16,750 INFO L225 Difference]: With dead ends: 80745 [2021-06-05 18:12:16,750 INFO L226 Difference]: Without dead ends: 80745 [2021-06-05 18:12:16,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:12:17,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80745 states. [2021-06-05 18:12:17,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80745 to 57690. [2021-06-05 18:12:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57690 states, 57688 states have (on average 2.68785535986687) internal successors, (155057), 57689 states have internal predecessors, (155057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57690 states to 57690 states and 155057 transitions. [2021-06-05 18:12:18,170 INFO L78 Accepts]: Start accepts. Automaton has 57690 states and 155057 transitions. Word has length 356 [2021-06-05 18:12:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:18,170 INFO L482 AbstractCegarLoop]: Abstraction has 57690 states and 155057 transitions. [2021-06-05 18:12:18,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 57690 states and 155057 transitions. [2021-06-05 18:12:18,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:12:18,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:18,239 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:18,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:18,441 INFO L430 AbstractCegarLoop]: === Iteration 47 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1126090303, now seen corresponding path program 17 times [2021-06-05 18:12:18,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:18,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666108695] [2021-06-05 18:12:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:12:18,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:18,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666108695] [2021-06-05 18:12:18,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666108695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:18,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764132495] [2021-06-05 18:12:18,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:18,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:12:18,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:18,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:18,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:12:19,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764132495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:19,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:19,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:12:19,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933927656] [2021-06-05 18:12:19,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:19,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:19,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:19,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:19,337 INFO L87 Difference]: Start difference. First operand 57690 states and 155057 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:19,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:19,788 INFO L93 Difference]: Finished difference Result 80040 states and 212249 transitions. [2021-06-05 18:12:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:12:19,788 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-06-05 18:12:19,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:19,889 INFO L225 Difference]: With dead ends: 80040 [2021-06-05 18:12:19,889 INFO L226 Difference]: Without dead ends: 80040 [2021-06-05 18:12:19,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:12:20,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80040 states. [2021-06-05 18:12:20,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80040 to 56230. [2021-06-05 18:12:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56230 states, 56228 states have (on average 2.6851746460838015) internal successors, (150982), 56229 states have internal predecessors, (150982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56230 states to 56230 states and 150982 transitions. [2021-06-05 18:12:21,100 INFO L78 Accepts]: Start accepts. Automaton has 56230 states and 150982 transitions. Word has length 356 [2021-06-05 18:12:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:21,100 INFO L482 AbstractCegarLoop]: Abstraction has 56230 states and 150982 transitions. [2021-06-05 18:12:21,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 56230 states and 150982 transitions. [2021-06-05 18:12:21,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:12:21,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:21,396 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:21,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 18:12:21,596 INFO L430 AbstractCegarLoop]: === Iteration 48 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:21,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1962101983, now seen corresponding path program 18 times [2021-06-05 18:12:21,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:21,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669454599] [2021-06-05 18:12:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:12:21,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:21,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669454599] [2021-06-05 18:12:21,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669454599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:21,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074869584] [2021-06-05 18:12:21,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:22,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:12:22,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:22,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:22,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:12:22,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074869584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:22,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:22,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:12:22,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869503748] [2021-06-05 18:12:22,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:22,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:22,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:22,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:22,457 INFO L87 Difference]: Start difference. First operand 56230 states and 150982 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:22,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:22,884 INFO L93 Difference]: Finished difference Result 93860 states and 250583 transitions. [2021-06-05 18:12:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:12:22,885 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-06-05 18:12:22,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:22,997 INFO L225 Difference]: With dead ends: 93860 [2021-06-05 18:12:22,997 INFO L226 Difference]: Without dead ends: 93860 [2021-06-05 18:12:22,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 190.5ms TimeCoverageRelationStatistics Valid=280, Invalid=776, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:12:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93860 states. [2021-06-05 18:12:23,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93860 to 60790. [2021-06-05 18:12:24,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60790 states, 60788 states have (on average 2.6904981246298614) internal successors, (163550), 60789 states have internal predecessors, (163550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:24,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60790 states to 60790 states and 163550 transitions. [2021-06-05 18:12:24,161 INFO L78 Accepts]: Start accepts. Automaton has 60790 states and 163550 transitions. Word has length 356 [2021-06-05 18:12:24,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:24,161 INFO L482 AbstractCegarLoop]: Abstraction has 60790 states and 163550 transitions. [2021-06-05 18:12:24,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:24,161 INFO L276 IsEmpty]: Start isEmpty. Operand 60790 states and 163550 transitions. [2021-06-05 18:12:24,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:12:24,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:24,418 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:24,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 18:12:24,618 INFO L430 AbstractCegarLoop]: === Iteration 49 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:24,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1850574717, now seen corresponding path program 19 times [2021-06-05 18:12:24,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:24,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818293486] [2021-06-05 18:12:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:12:24,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:24,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818293486] [2021-06-05 18:12:24,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818293486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:24,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023401778] [2021-06-05 18:12:24,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:24,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:24,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:12:25,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023401778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:25,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:25,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:12:25,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035686987] [2021-06-05 18:12:25,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:25,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:25,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:25,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:25,311 INFO L87 Difference]: Start difference. First operand 60790 states and 163550 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:25,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:25,771 INFO L93 Difference]: Finished difference Result 92305 states and 246335 transitions. [2021-06-05 18:12:25,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:12:25,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-06-05 18:12:25,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:25,884 INFO L225 Difference]: With dead ends: 92305 [2021-06-05 18:12:25,884 INFO L226 Difference]: Without dead ends: 92305 [2021-06-05 18:12:25,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:12:26,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92305 states. [2021-06-05 18:12:26,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92305 to 60110. [2021-06-05 18:12:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60110 states, 60108 states have (on average 2.6894922472882143) internal successors, (161660), 60109 states have internal predecessors, (161660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60110 states to 60110 states and 161660 transitions. [2021-06-05 18:12:27,121 INFO L78 Accepts]: Start accepts. Automaton has 60110 states and 161660 transitions. Word has length 356 [2021-06-05 18:12:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:27,121 INFO L482 AbstractCegarLoop]: Abstraction has 60110 states and 161660 transitions. [2021-06-05 18:12:27,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:27,122 INFO L276 IsEmpty]: Start isEmpty. Operand 60110 states and 161660 transitions. [2021-06-05 18:12:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:12:27,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:27,369 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:27,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 18:12:27,589 INFO L430 AbstractCegarLoop]: === Iteration 50 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:27,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:27,589 INFO L82 PathProgramCache]: Analyzing trace with hash -466572671, now seen corresponding path program 20 times [2021-06-05 18:12:27,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:27,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149630785] [2021-06-05 18:12:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:12:27,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:27,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149630785] [2021-06-05 18:12:27,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149630785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:27,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516969112] [2021-06-05 18:12:27,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:27,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:12:27,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:27,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:27,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:12:28,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516969112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:28,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:28,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:12:28,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297686510] [2021-06-05 18:12:28,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:28,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:28,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:28,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:28,238 INFO L87 Difference]: Start difference. First operand 60110 states and 161660 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:28,657 INFO L93 Difference]: Finished difference Result 81200 states and 216181 transitions. [2021-06-05 18:12:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:12:28,658 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-06-05 18:12:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:28,755 INFO L225 Difference]: With dead ends: 81200 [2021-06-05 18:12:28,755 INFO L226 Difference]: Without dead ends: 81200 [2021-06-05 18:12:28,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:12:28,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81200 states. [2021-06-05 18:12:29,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81200 to 62530. [2021-06-05 18:12:29,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62530 states, 62528 states have (on average 2.691002430910952) internal successors, (168263), 62529 states have internal predecessors, (168263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62530 states to 62530 states and 168263 transitions. [2021-06-05 18:12:29,819 INFO L78 Accepts]: Start accepts. Automaton has 62530 states and 168263 transitions. Word has length 356 [2021-06-05 18:12:29,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:29,819 INFO L482 AbstractCegarLoop]: Abstraction has 62530 states and 168263 transitions. [2021-06-05 18:12:29,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 62530 states and 168263 transitions. [2021-06-05 18:12:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:12:29,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:29,890 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:30,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:30,090 INFO L430 AbstractCegarLoop]: === Iteration 51 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:30,091 INFO L82 PathProgramCache]: Analyzing trace with hash -578099937, now seen corresponding path program 21 times [2021-06-05 18:12:30,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:30,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728060098] [2021-06-05 18:12:30,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:12:30,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:30,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728060098] [2021-06-05 18:12:30,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728060098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:30,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746706239] [2021-06-05 18:12:30,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:30,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:12:30,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:30,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:30,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:12:31,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746706239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:31,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:31,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:12:31,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347119811] [2021-06-05 18:12:31,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:31,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:31,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:31,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:31,129 INFO L87 Difference]: Start difference. First operand 62530 states and 168263 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:31,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:31,618 INFO L93 Difference]: Finished difference Result 107085 states and 286976 transitions. [2021-06-05 18:12:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:12:31,619 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-06-05 18:12:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:31,759 INFO L225 Difference]: With dead ends: 107085 [2021-06-05 18:12:31,759 INFO L226 Difference]: Without dead ends: 107085 [2021-06-05 18:12:31,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:12:31,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107085 states. [2021-06-05 18:12:33,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107085 to 64470. [2021-06-05 18:12:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64470 states, 64468 states have (on average 2.692839858534467) internal successors, (173602), 64469 states have internal predecessors, (173602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64470 states to 64470 states and 173602 transitions. [2021-06-05 18:12:33,452 INFO L78 Accepts]: Start accepts. Automaton has 64470 states and 173602 transitions. Word has length 356 [2021-06-05 18:12:33,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:33,453 INFO L482 AbstractCegarLoop]: Abstraction has 64470 states and 173602 transitions. [2021-06-05 18:12:33,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:33,453 INFO L276 IsEmpty]: Start isEmpty. Operand 64470 states and 173602 transitions. [2021-06-05 18:12:33,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-06-05 18:12:33,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:33,532 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:33,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:33,734 INFO L430 AbstractCegarLoop]: === Iteration 52 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:33,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:33,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1006996314, now seen corresponding path program 9 times [2021-06-05 18:12:33,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:33,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624852650] [2021-06-05 18:12:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:12:33,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:33,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624852650] [2021-06-05 18:12:33,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624852650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:33,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819568360] [2021-06-05 18:12:33,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:34,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:12:34,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:34,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:34,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:12:34,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819568360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:34,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:34,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:12:34,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25993163] [2021-06-05 18:12:34,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:12:34,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:34,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:12:34,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:12:34,742 INFO L87 Difference]: Start difference. First operand 64470 states and 173602 transitions. Second operand has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:35,261 INFO L93 Difference]: Finished difference Result 74359 states and 198824 transitions. [2021-06-05 18:12:35,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:12:35,261 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 360 [2021-06-05 18:12:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:35,352 INFO L225 Difference]: With dead ends: 74359 [2021-06-05 18:12:35,352 INFO L226 Difference]: Without dead ends: 74359 [2021-06-05 18:12:35,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=601, Invalid=1205, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:12:35,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74359 states. [2021-06-05 18:12:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74359 to 66272. [2021-06-05 18:12:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66272 states, 66270 states have (on average 2.6891806247170664) internal successors, (178212), 66271 states have internal predecessors, (178212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:36,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66272 states to 66272 states and 178212 transitions. [2021-06-05 18:12:36,455 INFO L78 Accepts]: Start accepts. Automaton has 66272 states and 178212 transitions. Word has length 360 [2021-06-05 18:12:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:36,455 INFO L482 AbstractCegarLoop]: Abstraction has 66272 states and 178212 transitions. [2021-06-05 18:12:36,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:36,455 INFO L276 IsEmpty]: Start isEmpty. Operand 66272 states and 178212 transitions. [2021-06-05 18:12:36,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-06-05 18:12:36,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:36,749 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:36,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:36,973 INFO L430 AbstractCegarLoop]: === Iteration 53 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:36,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:36,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1403343692, now seen corresponding path program 20 times [2021-06-05 18:12:36,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:36,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979966315] [2021-06-05 18:12:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:12:37,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:37,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979966315] [2021-06-05 18:12:37,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979966315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:37,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820906154] [2021-06-05 18:12:37,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:37,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:12:37,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:37,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:37,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:12:37,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820906154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:37,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:37,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:12:37,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946587466] [2021-06-05 18:12:37,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:12:37,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:37,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:12:37,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:12:37,689 INFO L87 Difference]: Start difference. First operand 66272 states and 178212 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:38,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:38,146 INFO L93 Difference]: Finished difference Result 78842 states and 210214 transitions. [2021-06-05 18:12:38,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:12:38,146 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-06-05 18:12:38,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:38,243 INFO L225 Difference]: With dead ends: 78842 [2021-06-05 18:12:38,243 INFO L226 Difference]: Without dead ends: 78842 [2021-06-05 18:12:38,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=425, Invalid=981, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:12:38,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78842 states. [2021-06-05 18:12:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78842 to 67632. [2021-06-05 18:12:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67632 states, 67630 states have (on average 2.69099512050865) internal successors, (181992), 67631 states have internal predecessors, (181992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67632 states to 67632 states and 181992 transitions. [2021-06-05 18:12:39,459 INFO L78 Accepts]: Start accepts. Automaton has 67632 states and 181992 transitions. Word has length 361 [2021-06-05 18:12:39,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:39,459 INFO L482 AbstractCegarLoop]: Abstraction has 67632 states and 181992 transitions. [2021-06-05 18:12:39,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 67632 states and 181992 transitions. [2021-06-05 18:12:39,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-06-05 18:12:39,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:39,536 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:39,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:39,737 INFO L430 AbstractCegarLoop]: === Iteration 54 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:39,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1061232174, now seen corresponding path program 21 times [2021-06-05 18:12:39,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:39,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100096865] [2021-06-05 18:12:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:12:40,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:40,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100096865] [2021-06-05 18:12:40,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100096865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:40,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311060393] [2021-06-05 18:12:40,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:40,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:12:40,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:40,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:40,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:12:40,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311060393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:40,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:40,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:12:40,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094513626] [2021-06-05 18:12:40,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:12:40,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:40,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:12:40,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:12:40,901 INFO L87 Difference]: Start difference. First operand 67632 states and 181992 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:41,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:41,355 INFO L93 Difference]: Finished difference Result 84237 states and 223851 transitions. [2021-06-05 18:12:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:12:41,355 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-06-05 18:12:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:41,456 INFO L225 Difference]: With dead ends: 84237 [2021-06-05 18:12:41,456 INFO L226 Difference]: Without dead ends: 84237 [2021-06-05 18:12:41,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 436.8ms TimeCoverageRelationStatistics Valid=423, Invalid=983, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:12:41,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84237 states. [2021-06-05 18:12:42,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84237 to 66952. [2021-06-05 18:12:42,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66952 states, 66950 states have (on average 2.690097087378641) internal successors, (180102), 66951 states have internal predecessors, (180102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66952 states to 66952 states and 180102 transitions. [2021-06-05 18:12:42,573 INFO L78 Accepts]: Start accepts. Automaton has 66952 states and 180102 transitions. Word has length 361 [2021-06-05 18:12:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:42,574 INFO L482 AbstractCegarLoop]: Abstraction has 66952 states and 180102 transitions. [2021-06-05 18:12:42,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:42,574 INFO L276 IsEmpty]: Start isEmpty. Operand 66952 states and 180102 transitions. [2021-06-05 18:12:42,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-06-05 18:12:42,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:42,647 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:42,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 18:12:42,847 INFO L430 AbstractCegarLoop]: === Iteration 55 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:42,848 INFO L82 PathProgramCache]: Analyzing trace with hash -879509904, now seen corresponding path program 22 times [2021-06-05 18:12:42,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:42,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880570658] [2021-06-05 18:12:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:12:43,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:43,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880570658] [2021-06-05 18:12:43,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880570658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:43,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764652259] [2021-06-05 18:12:43,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:43,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:12:43,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:43,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:43,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:43,744 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 18:12:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:12:44,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764652259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:44,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:44,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:12:44,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090657378] [2021-06-05 18:12:44,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:12:44,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:44,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:12:44,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:12:44,076 INFO L87 Difference]: Start difference. First operand 66952 states and 180102 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:44,546 INFO L93 Difference]: Finished difference Result 87037 states and 232000 transitions. [2021-06-05 18:12:44,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:12:44,546 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-06-05 18:12:44,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:44,651 INFO L225 Difference]: With dead ends: 87037 [2021-06-05 18:12:44,651 INFO L226 Difference]: Without dead ends: 87037 [2021-06-05 18:12:44,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=433, Invalid=1049, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:12:44,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87037 states. [2021-06-05 18:12:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87037 to 68212. [2021-06-05 18:12:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68212 states, 68210 states have (on average 2.6909690661193375) internal successors, (183551), 68211 states have internal predecessors, (183551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68212 states to 68212 states and 183551 transitions. [2021-06-05 18:12:45,855 INFO L78 Accepts]: Start accepts. Automaton has 68212 states and 183551 transitions. Word has length 361 [2021-06-05 18:12:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:45,855 INFO L482 AbstractCegarLoop]: Abstraction has 68212 states and 183551 transitions. [2021-06-05 18:12:45,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 68212 states and 183551 transitions. [2021-06-05 18:12:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-06-05 18:12:45,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:45,932 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:46,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:46,137 INFO L430 AbstractCegarLoop]: === Iteration 56 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:46,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:46,137 INFO L82 PathProgramCache]: Analyzing trace with hash -270851442, now seen corresponding path program 23 times [2021-06-05 18:12:46,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:46,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916484126] [2021-06-05 18:12:46,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:12:46,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:46,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916484126] [2021-06-05 18:12:46,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916484126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:46,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790448945] [2021-06-05 18:12:46,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:46,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:12:46,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:46,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:46,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:12:47,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790448945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:47,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:47,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:12:47,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210234695] [2021-06-05 18:12:47,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:12:47,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:47,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:12:47,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:12:47,093 INFO L87 Difference]: Start difference. First operand 68212 states and 183551 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:47,601 INFO L93 Difference]: Finished difference Result 91482 states and 243654 transitions. [2021-06-05 18:12:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:12:47,602 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-06-05 18:12:47,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:47,716 INFO L225 Difference]: With dead ends: 91482 [2021-06-05 18:12:47,716 INFO L226 Difference]: Without dead ends: 91482 [2021-06-05 18:12:47,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:12:47,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91482 states. [2021-06-05 18:12:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91482 to 70152. [2021-06-05 18:12:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70152 states, 70150 states have (on average 2.692658588738418) internal successors, (188890), 70151 states have internal predecessors, (188890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70152 states to 70152 states and 188890 transitions. [2021-06-05 18:12:48,949 INFO L78 Accepts]: Start accepts. Automaton has 70152 states and 188890 transitions. Word has length 361 [2021-06-05 18:12:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:48,949 INFO L482 AbstractCegarLoop]: Abstraction has 70152 states and 188890 transitions. [2021-06-05 18:12:48,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:48,949 INFO L276 IsEmpty]: Start isEmpty. Operand 70152 states and 188890 transitions. [2021-06-05 18:12:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-06-05 18:12:49,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:49,029 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:49,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 18:12:49,230 INFO L430 AbstractCegarLoop]: === Iteration 57 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:49,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1192160812, now seen corresponding path program 24 times [2021-06-05 18:12:49,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:49,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542992810] [2021-06-05 18:12:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:12:49,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:49,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542992810] [2021-06-05 18:12:49,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542992810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:49,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403587741] [2021-06-05 18:12:49,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:49,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:12:49,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:49,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:49,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:12:50,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403587741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:50,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:50,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:12:50,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763331896] [2021-06-05 18:12:50,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:12:50,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:50,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:12:50,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:12:50,330 INFO L87 Difference]: Start difference. First operand 70152 states and 188890 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:50,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:50,849 INFO L93 Difference]: Finished difference Result 94847 states and 252707 transitions. [2021-06-05 18:12:50,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:12:50,850 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-06-05 18:12:50,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:50,960 INFO L225 Difference]: With dead ends: 94847 [2021-06-05 18:12:50,960 INFO L226 Difference]: Without dead ends: 94847 [2021-06-05 18:12:50,961 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=453, Invalid=1187, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:12:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94847 states. [2021-06-05 18:12:52,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94847 to 73352. [2021-06-05 18:12:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73352 states, 73350 states have (on average 2.6949965916837084) internal successors, (197678), 73351 states have internal predecessors, (197678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73352 states to 73352 states and 197678 transitions. [2021-06-05 18:12:52,259 INFO L78 Accepts]: Start accepts. Automaton has 73352 states and 197678 transitions. Word has length 361 [2021-06-05 18:12:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:52,259 INFO L482 AbstractCegarLoop]: Abstraction has 73352 states and 197678 transitions. [2021-06-05 18:12:52,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:52,259 INFO L276 IsEmpty]: Start isEmpty. Operand 73352 states and 197678 transitions. [2021-06-05 18:12:52,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-06-05 18:12:52,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:52,344 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:52,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 18:12:52,544 INFO L430 AbstractCegarLoop]: === Iteration 58 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:52,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:52,544 INFO L82 PathProgramCache]: Analyzing trace with hash -14614198, now seen corresponding path program 25 times [2021-06-05 18:12:52,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:52,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243375672] [2021-06-05 18:12:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:12:52,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:52,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243375672] [2021-06-05 18:12:52,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243375672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:52,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529148853] [2021-06-05 18:12:52,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:52,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:52,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:53,259 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:12:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:12:53,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529148853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:53,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:53,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:12:53,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243273644] [2021-06-05 18:12:53,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:12:53,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:53,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:12:53,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:12:53,426 INFO L87 Difference]: Start difference. First operand 73352 states and 197678 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:53,977 INFO L93 Difference]: Finished difference Result 91972 states and 244941 transitions. [2021-06-05 18:12:53,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:12:53,978 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-06-05 18:12:53,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:54,090 INFO L225 Difference]: With dead ends: 91972 [2021-06-05 18:12:54,090 INFO L226 Difference]: Without dead ends: 91972 [2021-06-05 18:12:54,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 278.6ms TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:12:54,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91972 states. [2021-06-05 18:12:55,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91972 to 73352. [2021-06-05 18:12:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73352 states, 73350 states have (on average 2.6949965916837084) internal successors, (197678), 73351 states have internal predecessors, (197678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73352 states to 73352 states and 197678 transitions. [2021-06-05 18:12:55,394 INFO L78 Accepts]: Start accepts. Automaton has 73352 states and 197678 transitions. Word has length 361 [2021-06-05 18:12:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:55,394 INFO L482 AbstractCegarLoop]: Abstraction has 73352 states and 197678 transitions. [2021-06-05 18:12:55,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 73352 states and 197678 transitions. [2021-06-05 18:12:55,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-06-05 18:12:55,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:55,478 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:55,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:55,678 INFO L430 AbstractCegarLoop]: === Iteration 59 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:55,679 INFO L82 PathProgramCache]: Analyzing trace with hash -126141464, now seen corresponding path program 26 times [2021-06-05 18:12:55,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:55,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147780817] [2021-06-05 18:12:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:12:55,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:55,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147780817] [2021-06-05 18:12:55,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147780817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:55,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387397558] [2021-06-05 18:12:55,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:56,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:12:56,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:56,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:56,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:12:56,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387397558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:56,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:56,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:12:56,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920664786] [2021-06-05 18:12:56,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:12:56,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:56,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:12:56,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:12:56,642 INFO L87 Difference]: Start difference. First operand 73352 states and 197678 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:57,172 INFO L93 Difference]: Finished difference Result 91272 states and 243453 transitions. [2021-06-05 18:12:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:12:57,173 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-06-05 18:12:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:57,282 INFO L225 Difference]: With dead ends: 91272 [2021-06-05 18:12:57,283 INFO L226 Difference]: Without dead ends: 91272 [2021-06-05 18:12:57,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=473, Invalid=1333, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:12:57,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91272 states. [2021-06-05 18:12:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91272 to 72672. [2021-06-05 18:12:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72672 states, 72670 states have (on average 2.6942066877666164) internal successors, (195788), 72671 states have internal predecessors, (195788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:58,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72672 states to 72672 states and 195788 transitions. [2021-06-05 18:12:58,561 INFO L78 Accepts]: Start accepts. Automaton has 72672 states and 195788 transitions. Word has length 361 [2021-06-05 18:12:58,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:58,562 INFO L482 AbstractCegarLoop]: Abstraction has 72672 states and 195788 transitions. [2021-06-05 18:12:58,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:58,562 INFO L276 IsEmpty]: Start isEmpty. Operand 72672 states and 195788 transitions. [2021-06-05 18:12:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-06-05 18:12:58,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:58,644 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:12:58,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 18:12:58,844 INFO L430 AbstractCegarLoop]: === Iteration 60 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:58,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:58,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1351953105, now seen corresponding path program 22 times [2021-06-05 18:12:58,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:58,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754281947] [2021-06-05 18:12:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 821 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:12:58,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:58,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754281947] [2021-06-05 18:12:58,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754281947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:58,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120636717] [2021-06-05 18:12:58,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:59,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:12:59,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:59,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:12:59,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 797 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:12:59,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120636717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:59,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:59,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:12:59,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317763948] [2021-06-05 18:12:59,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:12:59,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:59,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:12:59,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:12:59,951 INFO L87 Difference]: Start difference. First operand 72672 states and 195788 transitions. Second operand has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:00,362 INFO L93 Difference]: Finished difference Result 91802 states and 243283 transitions. [2021-06-05 18:13:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:13:00,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 385 [2021-06-05 18:13:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:00,471 INFO L225 Difference]: With dead ends: 91802 [2021-06-05 18:13:00,471 INFO L226 Difference]: Without dead ends: 91802 [2021-06-05 18:13:00,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:13:00,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91802 states. [2021-06-05 18:13:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91802 to 67052. [2021-06-05 18:13:01,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67052 states, 67050 states have (on average 2.6904847129008203) internal successors, (180397), 67051 states have internal predecessors, (180397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67052 states to 67052 states and 180397 transitions. [2021-06-05 18:13:01,700 INFO L78 Accepts]: Start accepts. Automaton has 67052 states and 180397 transitions. Word has length 385 [2021-06-05 18:13:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:01,700 INFO L482 AbstractCegarLoop]: Abstraction has 67052 states and 180397 transitions. [2021-06-05 18:13:01,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:01,701 INFO L276 IsEmpty]: Start isEmpty. Operand 67052 states and 180397 transitions. [2021-06-05 18:13:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-06-05 18:13:01,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:01,777 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:01,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:01,977 INFO L430 AbstractCegarLoop]: === Iteration 61 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:01,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:01,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1463480371, now seen corresponding path program 23 times [2021-06-05 18:13:01,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:01,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699781953] [2021-06-05 18:13:01,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 821 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:13:02,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:02,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699781953] [2021-06-05 18:13:02,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699781953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:02,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139706175] [2021-06-05 18:13:02,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:02,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:13:02,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:02,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:02,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 797 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:13:02,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139706175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:02,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:02,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:13:02,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022296983] [2021-06-05 18:13:02,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:13:02,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:02,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:13:02,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:13:02,716 INFO L87 Difference]: Start difference. First operand 67052 states and 180397 transitions. Second operand has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:02,982 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-05 18:13:03,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:03,364 INFO L93 Difference]: Finished difference Result 98607 states and 262626 transitions. [2021-06-05 18:13:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:13:03,364 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 385 [2021-06-05 18:13:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:03,506 INFO L225 Difference]: With dead ends: 98607 [2021-06-05 18:13:03,506 INFO L226 Difference]: Without dead ends: 98607 [2021-06-05 18:13:03,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:13:03,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98607 states. [2021-06-05 18:13:04,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98607 to 68412. [2021-06-05 18:13:04,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68412 states, 68410 states have (on average 2.692252594649905) internal successors, (184177), 68411 states have internal predecessors, (184177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68412 states to 68412 states and 184177 transitions. [2021-06-05 18:13:04,926 INFO L78 Accepts]: Start accepts. Automaton has 68412 states and 184177 transitions. Word has length 385 [2021-06-05 18:13:04,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:04,927 INFO L482 AbstractCegarLoop]: Abstraction has 68412 states and 184177 transitions. [2021-06-05 18:13:04,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:04,927 INFO L276 IsEmpty]: Start isEmpty. Operand 68412 states and 184177 transitions. [2021-06-05 18:13:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-06-05 18:13:05,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:05,006 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:05,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 18:13:05,207 INFO L430 AbstractCegarLoop]: === Iteration 62 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:05,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1508739601, now seen corresponding path program 24 times [2021-06-05 18:13:05,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:05,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213759247] [2021-06-05 18:13:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 821 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:13:05,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:05,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213759247] [2021-06-05 18:13:05,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213759247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:05,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867220572] [2021-06-05 18:13:05,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:05,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:13:05,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:05,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:05,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 797 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:13:06,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867220572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:06,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:06,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:13:06,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124130166] [2021-06-05 18:13:06,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:13:06,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:06,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:13:06,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:13:06,232 INFO L87 Difference]: Start difference. First operand 68412 states and 184177 transitions. Second operand has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:06,721 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-05 18:13:07,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:07,059 INFO L93 Difference]: Finished difference Result 99387 states and 264871 transitions. [2021-06-05 18:13:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:13:07,060 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 385 [2021-06-05 18:13:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:07,207 INFO L225 Difference]: With dead ends: 99387 [2021-06-05 18:13:07,208 INFO L226 Difference]: Without dead ends: 99387 [2021-06-05 18:13:07,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 531.3ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:13:07,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99387 states. [2021-06-05 18:13:08,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99387 to 70352. [2021-06-05 18:13:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70352 states, 70350 states have (on average 2.693901918976546) internal successors, (189516), 70351 states have internal predecessors, (189516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:08,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70352 states to 70352 states and 189516 transitions. [2021-06-05 18:13:08,551 INFO L78 Accepts]: Start accepts. Automaton has 70352 states and 189516 transitions. Word has length 385 [2021-06-05 18:13:08,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:08,551 INFO L482 AbstractCegarLoop]: Abstraction has 70352 states and 189516 transitions. [2021-06-05 18:13:08,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:08,551 INFO L276 IsEmpty]: Start isEmpty. Operand 70352 states and 189516 transitions. [2021-06-05 18:13:08,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-06-05 18:13:08,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:08,635 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:08,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:08,836 INFO L430 AbstractCegarLoop]: === Iteration 63 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:08,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:08,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2063723533, now seen corresponding path program 25 times [2021-06-05 18:13:08,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:08,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837831786] [2021-06-05 18:13:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:13:08,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:08,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837831786] [2021-06-05 18:13:08,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837831786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:08,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280532020] [2021-06-05 18:13:08,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:09,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:09,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:13:09,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280532020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:09,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:09,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:13:09,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797263470] [2021-06-05 18:13:09,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:13:09,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:09,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:13:09,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:13:09,518 INFO L87 Difference]: Start difference. First operand 70352 states and 189516 transitions. Second operand has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:10,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:10,402 INFO L93 Difference]: Finished difference Result 110607 states and 294134 transitions. [2021-06-05 18:13:10,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:13:10,402 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 385 [2021-06-05 18:13:10,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:10,549 INFO L225 Difference]: With dead ends: 110607 [2021-06-05 18:13:10,549 INFO L226 Difference]: Without dead ends: 110607 [2021-06-05 18:13:10,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:13:10,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110607 states. [2021-06-05 18:13:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110607 to 79172. [2021-06-05 18:13:11,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79172 states, 79170 states have (on average 2.6996463306808134) internal successors, (213731), 79171 states have internal predecessors, (213731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79172 states to 79172 states and 213731 transitions. [2021-06-05 18:13:12,099 INFO L78 Accepts]: Start accepts. Automaton has 79172 states and 213731 transitions. Word has length 385 [2021-06-05 18:13:12,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:12,099 INFO L482 AbstractCegarLoop]: Abstraction has 79172 states and 213731 transitions. [2021-06-05 18:13:12,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 79172 states and 213731 transitions. [2021-06-05 18:13:12,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:13:12,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:12,189 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:12,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 18:13:12,390 INFO L430 AbstractCegarLoop]: === Iteration 64 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:12,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:12,390 INFO L82 PathProgramCache]: Analyzing trace with hash -921759614, now seen corresponding path program 26 times [2021-06-05 18:13:12,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:12,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777259340] [2021-06-05 18:13:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:13:12,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:12,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777259340] [2021-06-05 18:13:12,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777259340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:12,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192558064] [2021-06-05 18:13:12,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:12,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:13:12,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:12,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:12,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1029 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:13:13,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192558064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:13,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:13,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:13:13,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489258663] [2021-06-05 18:13:13,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:13,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:13,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:13,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:13,504 INFO L87 Difference]: Start difference. First operand 79172 states and 213731 transitions. Second operand has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:14,052 INFO L93 Difference]: Finished difference Result 100657 states and 267903 transitions. [2021-06-05 18:13:14,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:13:14,052 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-06-05 18:13:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:14,184 INFO L225 Difference]: With dead ends: 100657 [2021-06-05 18:13:14,184 INFO L226 Difference]: Without dead ends: 100657 [2021-06-05 18:13:14,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 282.3ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:13:14,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100657 states. [2021-06-05 18:13:15,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100657 to 75872. [2021-06-05 18:13:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75872 states, 75870 states have (on average 2.6968762356662714) internal successors, (204612), 75871 states have internal predecessors, (204612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75872 states to 75872 states and 204612 transitions. [2021-06-05 18:13:15,626 INFO L78 Accepts]: Start accepts. Automaton has 75872 states and 204612 transitions. Word has length 390 [2021-06-05 18:13:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:15,626 INFO L482 AbstractCegarLoop]: Abstraction has 75872 states and 204612 transitions. [2021-06-05 18:13:15,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:15,626 INFO L276 IsEmpty]: Start isEmpty. Operand 75872 states and 204612 transitions. [2021-06-05 18:13:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:13:15,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:15,717 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:15,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:15,918 INFO L430 AbstractCegarLoop]: === Iteration 65 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:15,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:15,918 INFO L82 PathProgramCache]: Analyzing trace with hash -313101152, now seen corresponding path program 27 times [2021-06-05 18:13:15,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:15,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137115683] [2021-06-05 18:13:15,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:13:16,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:16,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137115683] [2021-06-05 18:13:16,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137115683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:16,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552359358] [2021-06-05 18:13:16,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:16,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:13:16,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:16,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:16,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1029 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:13:17,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552359358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:17,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:17,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:13:17,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99661547] [2021-06-05 18:13:17,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:17,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:17,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:17,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:17,189 INFO L87 Difference]: Start difference. First operand 75872 states and 204612 transitions. Second operand has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:17,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:17,726 INFO L93 Difference]: Finished difference Result 110072 states and 293417 transitions. [2021-06-05 18:13:17,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:13:17,726 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-06-05 18:13:17,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:17,873 INFO L225 Difference]: With dead ends: 110072 [2021-06-05 18:13:17,873 INFO L226 Difference]: Without dead ends: 110072 [2021-06-05 18:13:17,874 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:13:18,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110072 states. [2021-06-05 18:13:19,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110072 to 77132. [2021-06-05 18:13:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77132 states, 77130 states have (on average 2.6975366264747827) internal successors, (208061), 77131 states have internal predecessors, (208061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:19,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77132 states to 77132 states and 208061 transitions. [2021-06-05 18:13:19,412 INFO L78 Accepts]: Start accepts. Automaton has 77132 states and 208061 transitions. Word has length 390 [2021-06-05 18:13:19,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:19,412 INFO L482 AbstractCegarLoop]: Abstraction has 77132 states and 208061 transitions. [2021-06-05 18:13:19,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:19,412 INFO L276 IsEmpty]: Start isEmpty. Operand 77132 states and 208061 transitions. [2021-06-05 18:13:19,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:13:19,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:19,504 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:19,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 18:13:19,704 INFO L430 AbstractCegarLoop]: === Iteration 66 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:19,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:19,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1149911102, now seen corresponding path program 28 times [2021-06-05 18:13:19,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:19,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752209573] [2021-06-05 18:13:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:13:20,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:20,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752209573] [2021-06-05 18:13:20,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752209573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:20,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634833914] [2021-06-05 18:13:20,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:20,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:13:20,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:20,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:20,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1029 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:13:21,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634833914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:21,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:21,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:13:21,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716134421] [2021-06-05 18:13:21,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:21,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:21,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:21,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:21,078 INFO L87 Difference]: Start difference. First operand 77132 states and 208061 transitions. Second operand has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:21,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:21,626 INFO L93 Difference]: Finished difference Result 108342 states and 290031 transitions. [2021-06-05 18:13:21,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:13:21,626 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-06-05 18:13:21,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:21,771 INFO L225 Difference]: With dead ends: 108342 [2021-06-05 18:13:21,771 INFO L226 Difference]: Without dead ends: 108342 [2021-06-05 18:13:21,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=373, Invalid=1033, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:13:21,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108342 states. [2021-06-05 18:13:22,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108342 to 75872. [2021-06-05 18:13:23,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75872 states, 75870 states have (on average 2.6968762356662714) internal successors, (204612), 75871 states have internal predecessors, (204612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75872 states to 75872 states and 204612 transitions. [2021-06-05 18:13:23,191 INFO L78 Accepts]: Start accepts. Automaton has 75872 states and 204612 transitions. Word has length 390 [2021-06-05 18:13:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:23,192 INFO L482 AbstractCegarLoop]: Abstraction has 75872 states and 204612 transitions. [2021-06-05 18:13:23,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 75872 states and 204612 transitions. [2021-06-05 18:13:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:13:23,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:23,730 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:23,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:23,931 INFO L430 AbstractCegarLoop]: === Iteration 67 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:23,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:23,931 INFO L82 PathProgramCache]: Analyzing trace with hash -56863908, now seen corresponding path program 29 times [2021-06-05 18:13:23,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:23,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183384129] [2021-06-05 18:13:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:13:24,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:24,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183384129] [2021-06-05 18:13:24,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183384129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:24,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842061077] [2021-06-05 18:13:24,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:24,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:13:24,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:24,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:24,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1029 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:13:24,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842061077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:24,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:24,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:13:24,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145251733] [2021-06-05 18:13:24,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:24,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:24,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:24,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:24,969 INFO L87 Difference]: Start difference. First operand 75872 states and 204612 transitions. Second operand has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:25,516 INFO L93 Difference]: Finished difference Result 104127 states and 278167 transitions. [2021-06-05 18:13:25,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:13:25,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-06-05 18:13:25,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:25,658 INFO L225 Difference]: With dead ends: 104127 [2021-06-05 18:13:25,659 INFO L226 Difference]: Without dead ends: 104127 [2021-06-05 18:13:25,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 285.2ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:13:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104127 states. [2021-06-05 18:13:26,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104127 to 76552. [2021-06-05 18:13:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76552 states, 76550 states have (on average 2.6976094056172437) internal successors, (206502), 76551 states have internal predecessors, (206502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76552 states to 76552 states and 206502 transitions. [2021-06-05 18:13:27,422 INFO L78 Accepts]: Start accepts. Automaton has 76552 states and 206502 transitions. Word has length 390 [2021-06-05 18:13:27,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:27,423 INFO L482 AbstractCegarLoop]: Abstraction has 76552 states and 206502 transitions. [2021-06-05 18:13:27,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:27,423 INFO L276 IsEmpty]: Start isEmpty. Operand 76552 states and 206502 transitions. [2021-06-05 18:13:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:13:27,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:27,520 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:27,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 18:13:27,721 INFO L430 AbstractCegarLoop]: === Iteration 68 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:27,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:27,721 INFO L82 PathProgramCache]: Analyzing trace with hash -168391174, now seen corresponding path program 30 times [2021-06-05 18:13:27,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:27,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323601514] [2021-06-05 18:13:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:13:27,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:27,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323601514] [2021-06-05 18:13:27,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323601514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:27,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823100782] [2021-06-05 18:13:27,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:28,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:13:28,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:28,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:28,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:28,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1029 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:13:28,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823100782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:28,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:28,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:13:28,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517091256] [2021-06-05 18:13:28,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:28,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:28,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:28,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:28,723 INFO L87 Difference]: Start difference. First operand 76552 states and 206502 transitions. Second operand has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:29,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:29,256 INFO L93 Difference]: Finished difference Result 101522 states and 270995 transitions. [2021-06-05 18:13:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:13:29,257 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-06-05 18:13:29,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:29,407 INFO L225 Difference]: With dead ends: 101522 [2021-06-05 18:13:29,407 INFO L226 Difference]: Without dead ends: 101522 [2021-06-05 18:13:29,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 260.3ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:13:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101522 states. [2021-06-05 18:13:30,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101522 to 77232. [2021-06-05 18:13:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77232 states, 77230 states have (on average 2.698329664638094) internal successors, (208392), 77231 states have internal predecessors, (208392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:31,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77232 states to 77232 states and 208392 transitions. [2021-06-05 18:13:31,165 INFO L78 Accepts]: Start accepts. Automaton has 77232 states and 208392 transitions. Word has length 390 [2021-06-05 18:13:31,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:31,165 INFO L482 AbstractCegarLoop]: Abstraction has 77232 states and 208392 transitions. [2021-06-05 18:13:31,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:31,166 INFO L276 IsEmpty]: Start isEmpty. Operand 77232 states and 208392 transitions. [2021-06-05 18:13:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:13:31,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:31,251 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:31,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 18:13:31,451 INFO L430 AbstractCegarLoop]: === Iteration 69 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:31,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1691492674, now seen corresponding path program 31 times [2021-06-05 18:13:31,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:31,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576893877] [2021-06-05 18:13:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:31,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:31,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576893877] [2021-06-05 18:13:31,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576893877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:31,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973534217] [2021-06-05 18:13:31,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:31,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:31,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:32,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973534217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:32,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:32,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:32,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085605741] [2021-06-05 18:13:32,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:32,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:32,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:32,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:32,178 INFO L87 Difference]: Start difference. First operand 77232 states and 208392 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:32,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:32,692 INFO L93 Difference]: Finished difference Result 103412 states and 275074 transitions. [2021-06-05 18:13:32,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:13:32,692 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-06-05 18:13:32,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:32,836 INFO L225 Difference]: With dead ends: 103412 [2021-06-05 18:13:32,836 INFO L226 Difference]: Without dead ends: 103412 [2021-06-05 18:13:32,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=361, Invalid=971, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:13:33,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103412 states. [2021-06-05 18:13:34,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103412 to 75772. [2021-06-05 18:13:34,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75772 states, 75770 states have (on average 2.696542167084598) internal successors, (204317), 75771 states have internal predecessors, (204317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:34,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75772 states to 75772 states and 204317 transitions. [2021-06-05 18:13:34,587 INFO L78 Accepts]: Start accepts. Automaton has 75772 states and 204317 transitions. Word has length 390 [2021-06-05 18:13:34,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:34,588 INFO L482 AbstractCegarLoop]: Abstraction has 75772 states and 204317 transitions. [2021-06-05 18:13:34,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:34,588 INFO L276 IsEmpty]: Start isEmpty. Operand 75772 states and 204317 transitions. [2021-06-05 18:13:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:13:34,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:34,677 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:34,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 18:13:34,878 INFO L430 AbstractCegarLoop]: === Iteration 70 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:34,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:34,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1140462368, now seen corresponding path program 32 times [2021-06-05 18:13:34,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:34,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847367506] [2021-06-05 18:13:34,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:35,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:35,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847367506] [2021-06-05 18:13:35,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847367506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:35,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103072992] [2021-06-05 18:13:35,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:35,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:13:35,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:35,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:35,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103072992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:35,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:35,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:35,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725631892] [2021-06-05 18:13:35,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:35,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:35,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:35,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:35,612 INFO L87 Difference]: Start difference. First operand 75772 states and 204317 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:36,190 INFO L93 Difference]: Finished difference Result 126012 states and 337737 transitions. [2021-06-05 18:13:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:13:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-06-05 18:13:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:36,700 INFO L225 Difference]: With dead ends: 126012 [2021-06-05 18:13:36,700 INFO L226 Difference]: Without dead ends: 126012 [2021-06-05 18:13:36,700 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:13:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126012 states. [2021-06-05 18:13:37,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126012 to 80912. [2021-06-05 18:13:38,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80912 states, 80910 states have (on average 2.699839327648004) internal successors, (218444), 80911 states have internal predecessors, (218444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80912 states to 80912 states and 218444 transitions. [2021-06-05 18:13:38,188 INFO L78 Accepts]: Start accepts. Automaton has 80912 states and 218444 transitions. Word has length 390 [2021-06-05 18:13:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:38,188 INFO L482 AbstractCegarLoop]: Abstraction has 80912 states and 218444 transitions. [2021-06-05 18:13:38,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 80912 states and 218444 transitions. [2021-06-05 18:13:38,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:13:38,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:38,279 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:38,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:38,480 INFO L430 AbstractCegarLoop]: === Iteration 71 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:38,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1947729918, now seen corresponding path program 33 times [2021-06-05 18:13:38,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:38,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317219579] [2021-06-05 18:13:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:38,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:38,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317219579] [2021-06-05 18:13:38,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317219579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:38,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736024770] [2021-06-05 18:13:38,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:38,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:13:38,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:38,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:38,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:39,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736024770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:39,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:39,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:39,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086588637] [2021-06-05 18:13:39,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:39,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:39,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:39,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:39,359 INFO L87 Difference]: Start difference. First operand 80912 states and 218444 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:40,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:40,275 INFO L93 Difference]: Finished difference Result 123087 states and 329886 transitions. [2021-06-05 18:13:40,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:13:40,275 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-06-05 18:13:40,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:40,449 INFO L225 Difference]: With dead ends: 123087 [2021-06-05 18:13:40,449 INFO L226 Difference]: Without dead ends: 123087 [2021-06-05 18:13:40,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 238.6ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:13:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123087 states. [2021-06-05 18:13:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123087 to 81592. [2021-06-05 18:13:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81592 states, 81590 states have (on average 2.700502512562814) internal successors, (220334), 81591 states have internal predecessors, (220334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:41,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81592 states to 81592 states and 220334 transitions. [2021-06-05 18:13:41,957 INFO L78 Accepts]: Start accepts. Automaton has 81592 states and 220334 transitions. Word has length 390 [2021-06-05 18:13:41,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:41,957 INFO L482 AbstractCegarLoop]: Abstraction has 81592 states and 220334 transitions. [2021-06-05 18:13:41,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:41,957 INFO L276 IsEmpty]: Start isEmpty. Operand 81592 states and 220334 transitions. [2021-06-05 18:13:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:13:42,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:42,055 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:42,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:42,257 INFO L430 AbstractCegarLoop]: === Iteration 72 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:42,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:42,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1836202652, now seen corresponding path program 34 times [2021-06-05 18:13:42,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:42,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112902558] [2021-06-05 18:13:42,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:42,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:42,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112902558] [2021-06-05 18:13:42,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112902558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:42,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739549350] [2021-06-05 18:13:42,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:42,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:13:42,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:42,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:42,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:43,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739549350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:43,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:43,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:43,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613131809] [2021-06-05 18:13:43,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:43,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:43,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:43,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:43,274 INFO L87 Difference]: Start difference. First operand 81592 states and 220334 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:43,666 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 18:13:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:44,224 INFO L93 Difference]: Finished difference Result 118272 states and 316304 transitions. [2021-06-05 18:13:44,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:13:44,225 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-06-05 18:13:44,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:44,392 INFO L225 Difference]: With dead ends: 118272 [2021-06-05 18:13:44,392 INFO L226 Difference]: Without dead ends: 118272 [2021-06-05 18:13:44,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 600.9ms TimeCoverageRelationStatistics Valid=377, Invalid=1105, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:13:44,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118272 states. [2021-06-05 18:13:45,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118272 to 80912. [2021-06-05 18:13:45,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80912 states, 80910 states have (on average 2.699839327648004) internal successors, (218444), 80911 states have internal predecessors, (218444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80912 states to 80912 states and 218444 transitions. [2021-06-05 18:13:45,939 INFO L78 Accepts]: Start accepts. Automaton has 80912 states and 218444 transitions. Word has length 390 [2021-06-05 18:13:45,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:45,939 INFO L482 AbstractCegarLoop]: Abstraction has 80912 states and 218444 transitions. [2021-06-05 18:13:45,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 80912 states and 218444 transitions. [2021-06-05 18:13:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:13:46,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:46,032 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:46,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:46,233 INFO L430 AbstractCegarLoop]: === Iteration 73 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash -288005630, now seen corresponding path program 35 times [2021-06-05 18:13:46,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:46,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445728209] [2021-06-05 18:13:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:46,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:46,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445728209] [2021-06-05 18:13:46,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445728209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:46,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583275691] [2021-06-05 18:13:46,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:46,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:13:46,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:46,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:46,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:47,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583275691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:47,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:47,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:47,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302884622] [2021-06-05 18:13:47,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:47,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:47,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:47,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:47,449 INFO L87 Difference]: Start difference. First operand 80912 states and 218444 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:48,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:48,011 INFO L93 Difference]: Finished difference Result 108772 states and 290656 transitions. [2021-06-05 18:13:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:13:48,012 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-06-05 18:13:48,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:48,165 INFO L225 Difference]: With dead ends: 108772 [2021-06-05 18:13:48,165 INFO L226 Difference]: Without dead ends: 108772 [2021-06-05 18:13:48,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:13:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108772 states. [2021-06-05 18:13:49,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108772 to 79452. [2021-06-05 18:13:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79452 states, 79450 states have (on average 2.698162366268093) internal successors, (214369), 79451 states have internal predecessors, (214369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79452 states to 79452 states and 214369 transitions. [2021-06-05 18:13:49,715 INFO L78 Accepts]: Start accepts. Automaton has 79452 states and 214369 transitions. Word has length 390 [2021-06-05 18:13:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:49,715 INFO L482 AbstractCegarLoop]: Abstraction has 79452 states and 214369 transitions. [2021-06-05 18:13:49,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand 79452 states and 214369 transitions. [2021-06-05 18:13:49,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:13:49,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:49,806 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:50,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 18:13:50,006 INFO L430 AbstractCegarLoop]: === Iteration 74 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:50,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1494780640, now seen corresponding path program 36 times [2021-06-05 18:13:50,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:50,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418859850] [2021-06-05 18:13:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:50,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:50,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418859850] [2021-06-05 18:13:50,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418859850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:50,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868932776] [2021-06-05 18:13:50,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:50,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:13:50,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:50,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:50,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:51,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868932776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:51,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:51,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:51,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403818045] [2021-06-05 18:13:51,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:51,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:51,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:51,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:51,400 INFO L87 Difference]: Start difference. First operand 79452 states and 214369 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:52,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:52,035 INFO L93 Difference]: Finished difference Result 144497 states and 388615 transitions. [2021-06-05 18:13:52,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:13:52,035 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-06-05 18:13:52,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:52,241 INFO L225 Difference]: With dead ends: 144497 [2021-06-05 18:13:52,242 INFO L226 Difference]: Without dead ends: 144497 [2021-06-05 18:13:52,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=369, Invalid=1037, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:13:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144497 states. [2021-06-05 18:13:54,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144497 to 84012. [2021-06-05 18:13:54,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84012 states, 84010 states have (on average 2.701309367932389) internal successors, (226937), 84011 states have internal predecessors, (226937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:54,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84012 states to 84012 states and 226937 transitions. [2021-06-05 18:13:54,236 INFO L78 Accepts]: Start accepts. Automaton has 84012 states and 226937 transitions. Word has length 390 [2021-06-05 18:13:54,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:54,237 INFO L482 AbstractCegarLoop]: Abstraction has 84012 states and 226937 transitions. [2021-06-05 18:13:54,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:54,237 INFO L276 IsEmpty]: Start isEmpty. Operand 84012 states and 226937 transitions. [2021-06-05 18:13:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:13:54,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:54,329 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:54,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:54,532 INFO L430 AbstractCegarLoop]: === Iteration 75 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:54,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1606307906, now seen corresponding path program 37 times [2021-06-05 18:13:54,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:54,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024824551] [2021-06-05 18:13:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:54,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:54,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024824551] [2021-06-05 18:13:54,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024824551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:54,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011121810] [2021-06-05 18:13:54,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:54,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:54,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:55,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011121810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:55,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:55,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:55,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390186460] [2021-06-05 18:13:55,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:55,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:55,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:55,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:55,255 INFO L87 Difference]: Start difference. First operand 84012 states and 226937 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:56,196 INFO L93 Difference]: Finished difference Result 134952 states and 362479 transitions. [2021-06-05 18:13:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:13:56,197 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-06-05 18:13:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:56,385 INFO L225 Difference]: With dead ends: 134952 [2021-06-05 18:13:56,386 INFO L226 Difference]: Without dead ends: 134952 [2021-06-05 18:13:56,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=378, Invalid=1104, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:13:56,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134952 states. [2021-06-05 18:13:57,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134952 to 85952. [2021-06-05 18:13:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85952 states, 85950 states have (on average 2.702454915648633) internal successors, (232276), 85951 states have internal predecessors, (232276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85952 states to 85952 states and 232276 transitions. [2021-06-05 18:13:58,082 INFO L78 Accepts]: Start accepts. Automaton has 85952 states and 232276 transitions. Word has length 390 [2021-06-05 18:13:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:58,082 INFO L482 AbstractCegarLoop]: Abstraction has 85952 states and 232276 transitions. [2021-06-05 18:13:58,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 85952 states and 232276 transitions. [2021-06-05 18:13:58,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:13:58,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:58,183 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:13:58,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:58,384 INFO L430 AbstractCegarLoop]: === Iteration 76 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:58,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:58,384 INFO L82 PathProgramCache]: Analyzing trace with hash 371512002, now seen corresponding path program 38 times [2021-06-05 18:13:58,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:58,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164082592] [2021-06-05 18:13:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:58,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:58,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164082592] [2021-06-05 18:13:58,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164082592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:58,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150088883] [2021-06-05 18:13:58,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:58,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:13:58,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:58,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:58,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:59,228 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:13:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:59,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150088883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:59,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:59,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:59,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712729583] [2021-06-05 18:13:59,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:59,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:59,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:59,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:59,478 INFO L87 Difference]: Start difference. First operand 85952 states and 232276 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:00,081 INFO L93 Difference]: Finished difference Result 121397 states and 324452 transitions. [2021-06-05 18:14:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:14:00,082 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-06-05 18:14:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:00,244 INFO L225 Difference]: With dead ends: 121397 [2021-06-05 18:14:00,244 INFO L226 Difference]: Without dead ends: 121397 [2021-06-05 18:14:00,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 243.0ms TimeCoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:14:00,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121397 states. [2021-06-05 18:14:01,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121397 to 83552. [2021-06-05 18:14:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83552 states, 83550 states have (on average 2.6993656493117895) internal successors, (225532), 83551 states have internal predecessors, (225532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83552 states to 83552 states and 225532 transitions. [2021-06-05 18:14:01,893 INFO L78 Accepts]: Start accepts. Automaton has 83552 states and 225532 transitions. Word has length 390 [2021-06-05 18:14:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:01,894 INFO L482 AbstractCegarLoop]: Abstraction has 83552 states and 225532 transitions. [2021-06-05 18:14:01,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 83552 states and 225532 transitions. [2021-06-05 18:14:02,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:14:02,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:02,408 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:02,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:02,641 INFO L430 AbstractCegarLoop]: === Iteration 77 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:02,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:02,641 INFO L82 PathProgramCache]: Analyzing trace with hash 259984736, now seen corresponding path program 39 times [2021-06-05 18:14:02,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:02,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140339099] [2021-06-05 18:14:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:14:02,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:02,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140339099] [2021-06-05 18:14:02,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140339099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:02,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336280860] [2021-06-05 18:14:02,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:03,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:14:03,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:03,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:03,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:14:03,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336280860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:03,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:03,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:14:03,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938011256] [2021-06-05 18:14:03,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:03,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:03,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:03,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:03,657 INFO L87 Difference]: Start difference. First operand 83552 states and 225532 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:04,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:04,297 INFO L93 Difference]: Finished difference Result 143412 states and 385227 transitions. [2021-06-05 18:14:04,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:14:04,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-06-05 18:14:04,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:04,489 INFO L225 Difference]: With dead ends: 143412 [2021-06-05 18:14:04,489 INFO L226 Difference]: Without dead ends: 143412 [2021-06-05 18:14:04,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=379, Invalid=1103, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:14:05,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143412 states. [2021-06-05 18:14:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143412 to 85492. [2021-06-05 18:14:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85492 states, 85490 states have (on average 2.7005614691776816) internal successors, (230871), 85491 states have internal predecessors, (230871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:06,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85492 states to 85492 states and 230871 transitions. [2021-06-05 18:14:06,514 INFO L78 Accepts]: Start accepts. Automaton has 85492 states and 230871 transitions. Word has length 390 [2021-06-05 18:14:06,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:06,514 INFO L482 AbstractCegarLoop]: Abstraction has 85492 states and 230871 transitions. [2021-06-05 18:14:06,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:06,514 INFO L276 IsEmpty]: Start isEmpty. Operand 85492 states and 230871 transitions. [2021-06-05 18:14:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:14:06,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:06,612 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:06,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 18:14:06,813 INFO L430 AbstractCegarLoop]: === Iteration 78 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:06,813 INFO L82 PathProgramCache]: Analyzing trace with hash 214725506, now seen corresponding path program 40 times [2021-06-05 18:14:06,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:06,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260895400] [2021-06-05 18:14:06,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:14:06,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:06,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260895400] [2021-06-05 18:14:06,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260895400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:06,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785531131] [2021-06-05 18:14:06,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:07,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:14:07,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:07,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:07,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:14:07,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785531131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:07,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:07,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:14:07,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037659611] [2021-06-05 18:14:07,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:07,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:07,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:07,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:07,761 INFO L87 Difference]: Start difference. First operand 85492 states and 230871 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:08,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:08,648 INFO L93 Difference]: Finished difference Result 110267 states and 294603 transitions. [2021-06-05 18:14:08,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:14:08,649 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-06-05 18:14:08,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:08,791 INFO L225 Difference]: With dead ends: 110267 [2021-06-05 18:14:08,791 INFO L226 Difference]: Without dead ends: 110267 [2021-06-05 18:14:08,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:14:08,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110267 states. [2021-06-05 18:14:10,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110267 to 86752. [2021-06-05 18:14:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86752 states, 86750 states have (on average 2.701095100864553) internal successors, (234320), 86751 states have internal predecessors, (234320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86752 states to 86752 states and 234320 transitions. [2021-06-05 18:14:10,367 INFO L78 Accepts]: Start accepts. Automaton has 86752 states and 234320 transitions. Word has length 390 [2021-06-05 18:14:10,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:10,368 INFO L482 AbstractCegarLoop]: Abstraction has 86752 states and 234320 transitions. [2021-06-05 18:14:10,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 86752 states and 234320 transitions. [2021-06-05 18:14:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-06-05 18:14:10,476 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:10,476 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:10,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:10,677 INFO L430 AbstractCegarLoop]: === Iteration 79 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:10,677 INFO L82 PathProgramCache]: Analyzing trace with hash 657247387, now seen corresponding path program 10 times [2021-06-05 18:14:10,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:10,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941779694] [2021-06-05 18:14:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:14:10,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:10,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941779694] [2021-06-05 18:14:10,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941779694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:10,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053075098] [2021-06-05 18:14:10,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:11,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:14:11,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:11,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:11,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:12,014 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:14:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:14:12,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053075098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:12,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:12,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:14:12,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115315459] [2021-06-05 18:14:12,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:14:12,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:12,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:14:12,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:14:12,228 INFO L87 Difference]: Start difference. First operand 86752 states and 234320 transitions. Second operand has 25 states, 25 states have (on average 17.64) internal successors, (441), 25 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:12,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:12,856 INFO L93 Difference]: Finished difference Result 98251 states and 263785 transitions. [2021-06-05 18:14:12,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:14:12,857 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 17.64) internal successors, (441), 25 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 394 [2021-06-05 18:14:12,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:12,977 INFO L225 Difference]: With dead ends: 98251 [2021-06-05 18:14:12,977 INFO L226 Difference]: Without dead ends: 98251 [2021-06-05 18:14:12,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 378.0ms TimeCoverageRelationStatistics Valid=716, Invalid=1446, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:14:13,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98251 states. [2021-06-05 18:14:14,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98251 to 89234. [2021-06-05 18:14:14,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89234 states, 89232 states have (on average 2.6988076026537566) internal successors, (240820), 89233 states have internal predecessors, (240820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89234 states to 89234 states and 240820 transitions. [2021-06-05 18:14:14,470 INFO L78 Accepts]: Start accepts. Automaton has 89234 states and 240820 transitions. Word has length 394 [2021-06-05 18:14:14,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:14,470 INFO L482 AbstractCegarLoop]: Abstraction has 89234 states and 240820 transitions. [2021-06-05 18:14:14,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 17.64) internal successors, (441), 25 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:14,470 INFO L276 IsEmpty]: Start isEmpty. Operand 89234 states and 240820 transitions. [2021-06-05 18:14:14,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:14:14,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:14,577 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:14,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:14,778 INFO L430 AbstractCegarLoop]: === Iteration 80 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:14,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:14,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1529681781, now seen corresponding path program 27 times [2021-06-05 18:14:14,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:14,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483116749] [2021-06-05 18:14:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1348 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:14:15,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:15,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483116749] [2021-06-05 18:14:15,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483116749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:15,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024216523] [2021-06-05 18:14:15,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:15,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:14:15,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:15,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:15,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:16,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024216523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:16,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:16,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 22 [2021-06-05 18:14:16,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975286149] [2021-06-05 18:14:16,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:16,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:16,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:16,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:16,246 INFO L87 Difference]: Start difference. First operand 89234 states and 240820 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:16,819 INFO L93 Difference]: Finished difference Result 103444 states and 276915 transitions. [2021-06-05 18:14:16,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:14:16,819 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-06-05 18:14:16,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:16,958 INFO L225 Difference]: With dead ends: 103444 [2021-06-05 18:14:16,958 INFO L226 Difference]: Without dead ends: 103444 [2021-06-05 18:14:16,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 666.1ms TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:14:17,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103444 states. [2021-06-05 18:14:18,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103444 to 89914. [2021-06-05 18:14:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89914 states, 89912 states have (on average 2.699417207936649) internal successors, (242710), 89913 states have internal predecessors, (242710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:18,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89914 states to 89914 states and 242710 transitions. [2021-06-05 18:14:18,506 INFO L78 Accepts]: Start accepts. Automaton has 89914 states and 242710 transitions. Word has length 395 [2021-06-05 18:14:18,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:18,506 INFO L482 AbstractCegarLoop]: Abstraction has 89914 states and 242710 transitions. [2021-06-05 18:14:18,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:18,506 INFO L276 IsEmpty]: Start isEmpty. Operand 89914 states and 242710 transitions. [2021-06-05 18:14:19,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:14:19,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:19,035 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:19,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 18:14:19,235 INFO L430 AbstractCegarLoop]: === Iteration 81 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:19,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:19,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1135248659, now seen corresponding path program 28 times [2021-06-05 18:14:19,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:19,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325249562] [2021-06-05 18:14:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:19,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:19,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325249562] [2021-06-05 18:14:19,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325249562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:19,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453315990] [2021-06-05 18:14:19,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:19,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:14:19,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:19,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:19,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:20,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453315990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:20,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:20,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:14:20,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135119383] [2021-06-05 18:14:20,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:20,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:20,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:20,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:20,250 INFO L87 Difference]: Start difference. First operand 89914 states and 242710 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:20,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:20,861 INFO L93 Difference]: Finished difference Result 110429 states and 294732 transitions. [2021-06-05 18:14:20,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:14:20,861 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-06-05 18:14:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:21,008 INFO L225 Difference]: With dead ends: 110429 [2021-06-05 18:14:21,008 INFO L226 Difference]: Without dead ends: 110429 [2021-06-05 18:14:21,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:14:21,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110429 states. [2021-06-05 18:14:22,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110429 to 89914. [2021-06-05 18:14:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89914 states, 89912 states have (on average 2.699417207936649) internal successors, (242710), 89913 states have internal predecessors, (242710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89914 states to 89914 states and 242710 transitions. [2021-06-05 18:14:22,937 INFO L78 Accepts]: Start accepts. Automaton has 89914 states and 242710 transitions. Word has length 395 [2021-06-05 18:14:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:22,938 INFO L482 AbstractCegarLoop]: Abstraction has 89914 states and 242710 transitions. [2021-06-05 18:14:22,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 89914 states and 242710 transitions. [2021-06-05 18:14:23,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:14:23,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:23,044 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:23,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:23,244 INFO L430 AbstractCegarLoop]: === Iteration 82 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:23,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1477360177, now seen corresponding path program 29 times [2021-06-05 18:14:23,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:23,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395294079] [2021-06-05 18:14:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:23,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:23,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395294079] [2021-06-05 18:14:23,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395294079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:23,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010523299] [2021-06-05 18:14:23,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:23,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:14:23,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:23,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:23,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:24,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010523299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:24,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:24,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:14:24,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322350346] [2021-06-05 18:14:24,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:24,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:24,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:24,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:24,097 INFO L87 Difference]: Start difference. First operand 89914 states and 242710 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:25,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:25,050 INFO L93 Difference]: Finished difference Result 111689 states and 298642 transitions. [2021-06-05 18:14:25,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:14:25,050 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-06-05 18:14:25,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:25,189 INFO L225 Difference]: With dead ends: 111689 [2021-06-05 18:14:25,189 INFO L226 Difference]: Without dead ends: 111689 [2021-06-05 18:14:25,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=531, Invalid=1275, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:14:25,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111689 states. [2021-06-05 18:14:26,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111689 to 88554. [2021-06-05 18:14:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88554 states, 88552 states have (on average 2.698188634926371) internal successors, (238930), 88553 states have internal predecessors, (238930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88554 states to 88554 states and 238930 transitions. [2021-06-05 18:14:26,704 INFO L78 Accepts]: Start accepts. Automaton has 88554 states and 238930 transitions. Word has length 395 [2021-06-05 18:14:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:26,705 INFO L482 AbstractCegarLoop]: Abstraction has 88554 states and 238930 transitions. [2021-06-05 18:14:26,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 88554 states and 238930 transitions. [2021-06-05 18:14:26,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:14:26,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:26,815 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:27,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:27,016 INFO L430 AbstractCegarLoop]: === Iteration 83 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:27,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1659082447, now seen corresponding path program 30 times [2021-06-05 18:14:27,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:27,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055244249] [2021-06-05 18:14:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:27,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:27,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055244249] [2021-06-05 18:14:27,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055244249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:27,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757565386] [2021-06-05 18:14:27,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:27,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:14:27,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:27,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:27,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:28,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757565386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:28,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:28,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:14:28,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386178962] [2021-06-05 18:14:28,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:28,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:28,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:28,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:28,182 INFO L87 Difference]: Start difference. First operand 88554 states and 238930 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:29,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:29,204 INFO L93 Difference]: Finished difference Result 117004 states and 312456 transitions. [2021-06-05 18:14:29,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:14:29,204 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-06-05 18:14:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:29,366 INFO L225 Difference]: With dead ends: 117004 [2021-06-05 18:14:29,366 INFO L226 Difference]: Without dead ends: 117004 [2021-06-05 18:14:29,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 326.8ms TimeCoverageRelationStatistics Valid=542, Invalid=1350, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:14:29,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117004 states. [2021-06-05 18:14:30,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117004 to 89814. [2021-06-05 18:14:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89814 states, 89812 states have (on average 2.6987373624905358) internal successors, (242379), 89813 states have internal predecessors, (242379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89814 states to 89814 states and 242379 transitions. [2021-06-05 18:14:30,992 INFO L78 Accepts]: Start accepts. Automaton has 89814 states and 242379 transitions. Word has length 395 [2021-06-05 18:14:30,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:30,992 INFO L482 AbstractCegarLoop]: Abstraction has 89814 states and 242379 transitions. [2021-06-05 18:14:30,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:30,993 INFO L276 IsEmpty]: Start isEmpty. Operand 89814 states and 242379 transitions. [2021-06-05 18:14:31,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:14:31,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:31,098 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:31,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:31,298 INFO L430 AbstractCegarLoop]: === Iteration 84 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:31,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:31,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2027226387, now seen corresponding path program 31 times [2021-06-05 18:14:31,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:31,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304600758] [2021-06-05 18:14:31,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:31,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:31,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304600758] [2021-06-05 18:14:31,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304600758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:31,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666441661] [2021-06-05 18:14:31,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:32,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:32,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:32,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666441661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:32,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:32,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:14:32,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102753077] [2021-06-05 18:14:32,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:32,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:32,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:32,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:32,466 INFO L87 Difference]: Start difference. First operand 89814 states and 242379 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:33,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:33,116 INFO L93 Difference]: Finished difference Result 119859 states and 319930 transitions. [2021-06-05 18:14:33,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:14:33,116 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-06-05 18:14:33,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:33,274 INFO L225 Difference]: With dead ends: 119859 [2021-06-05 18:14:33,275 INFO L226 Difference]: Without dead ends: 119859 [2021-06-05 18:14:33,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=553, Invalid=1427, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:14:33,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119859 states. [2021-06-05 18:14:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119859 to 91754. [2021-06-05 18:14:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91754 states, 91752 states have (on average 2.6998648530822216) internal successors, (247718), 91753 states have internal predecessors, (247718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91754 states to 91754 states and 247718 transitions. [2021-06-05 18:14:35,344 INFO L78 Accepts]: Start accepts. Automaton has 91754 states and 247718 transitions. Word has length 395 [2021-06-05 18:14:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:35,344 INFO L482 AbstractCegarLoop]: Abstraction has 91754 states and 247718 transitions. [2021-06-05 18:14:35,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 91754 states and 247718 transitions. [2021-06-05 18:14:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:14:35,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:35,456 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:35,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:35,657 INFO L430 AbstractCegarLoop]: === Iteration 85 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:35,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:35,658 INFO L82 PathProgramCache]: Analyzing trace with hash -564214133, now seen corresponding path program 32 times [2021-06-05 18:14:35,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:35,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393555453] [2021-06-05 18:14:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:35,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:35,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393555453] [2021-06-05 18:14:35,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393555453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:35,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866067396] [2021-06-05 18:14:35,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:35,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:14:35,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:35,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:35,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:36,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866067396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:36,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:36,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:14:36,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2490550] [2021-06-05 18:14:36,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:36,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:36,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:36,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:36,414 INFO L87 Difference]: Start difference. First operand 91754 states and 247718 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:37,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:37,419 INFO L93 Difference]: Finished difference Result 120574 states and 321904 transitions. [2021-06-05 18:14:37,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:14:37,419 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-06-05 18:14:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:37,586 INFO L225 Difference]: With dead ends: 120574 [2021-06-05 18:14:37,586 INFO L226 Difference]: Without dead ends: 120574 [2021-06-05 18:14:37,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 324.7ms TimeCoverageRelationStatistics Valid=564, Invalid=1506, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:14:37,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120574 states. [2021-06-05 18:14:38,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120574 to 90494. [2021-06-05 18:14:39,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90494 states, 90492 states have (on average 2.6993435883835035) internal successors, (244269), 90493 states have internal predecessors, (244269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90494 states to 90494 states and 244269 transitions. [2021-06-05 18:14:39,174 INFO L78 Accepts]: Start accepts. Automaton has 90494 states and 244269 transitions. Word has length 395 [2021-06-05 18:14:39,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:39,174 INFO L482 AbstractCegarLoop]: Abstraction has 90494 states and 244269 transitions. [2021-06-05 18:14:39,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:39,175 INFO L276 IsEmpty]: Start isEmpty. Operand 90494 states and 244269 transitions. [2021-06-05 18:14:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:14:39,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:39,288 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:39,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:39,501 INFO L430 AbstractCegarLoop]: === Iteration 86 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:39,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:39,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1770989143, now seen corresponding path program 33 times [2021-06-05 18:14:39,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:39,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159149958] [2021-06-05 18:14:39,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:39,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:39,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159149958] [2021-06-05 18:14:39,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159149958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:39,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740409594] [2021-06-05 18:14:39,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:40,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:14:40,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:40,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:40,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:40,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740409594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:40,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:40,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:14:40,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483970990] [2021-06-05 18:14:40,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:40,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:40,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:40,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:40,491 INFO L87 Difference]: Start difference. First operand 90494 states and 244269 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:41,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:41,781 INFO L93 Difference]: Finished difference Result 116589 states and 311298 transitions. [2021-06-05 18:14:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:14:41,781 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-06-05 18:14:41,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:41,976 INFO L225 Difference]: With dead ends: 116589 [2021-06-05 18:14:41,976 INFO L226 Difference]: Without dead ends: 116589 [2021-06-05 18:14:41,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 354.5ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:14:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116589 states. [2021-06-05 18:14:43,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116589 to 90494. [2021-06-05 18:14:43,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90494 states, 90492 states have (on average 2.6993435883835035) internal successors, (244269), 90493 states have internal predecessors, (244269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90494 states to 90494 states and 244269 transitions. [2021-06-05 18:14:43,683 INFO L78 Accepts]: Start accepts. Automaton has 90494 states and 244269 transitions. Word has length 395 [2021-06-05 18:14:43,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:43,684 INFO L482 AbstractCegarLoop]: Abstraction has 90494 states and 244269 transitions. [2021-06-05 18:14:43,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 90494 states and 244269 transitions. [2021-06-05 18:14:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:14:43,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:43,789 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:43,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:43,990 INFO L430 AbstractCegarLoop]: === Iteration 87 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:43,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:43,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1882516409, now seen corresponding path program 34 times [2021-06-05 18:14:43,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:43,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031394463] [2021-06-05 18:14:43,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:44,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:44,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031394463] [2021-06-05 18:14:44,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031394463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:44,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427583869] [2021-06-05 18:14:44,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:44,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:14:44,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:44,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:44,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:45,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427583869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:45,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:45,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:14:45,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696048350] [2021-06-05 18:14:45,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:45,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:45,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:45,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:45,055 INFO L87 Difference]: Start difference. First operand 90494 states and 244269 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:46,082 INFO L93 Difference]: Finished difference Result 113179 states and 302510 transitions. [2021-06-05 18:14:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:14:46,083 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-06-05 18:14:46,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:46,227 INFO L225 Difference]: With dead ends: 113179 [2021-06-05 18:14:46,227 INFO L226 Difference]: Without dead ends: 113179 [2021-06-05 18:14:46,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=586, Invalid=1670, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:14:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113179 states. [2021-06-05 18:14:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113179 to 88454. [2021-06-05 18:14:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88454 states, 88452 states have (on average 2.6974969474969477) internal successors, (238599), 88453 states have internal predecessors, (238599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88454 states to 88454 states and 238599 transitions. [2021-06-05 18:14:47,829 INFO L78 Accepts]: Start accepts. Automaton has 88454 states and 238599 transitions. Word has length 395 [2021-06-05 18:14:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:47,829 INFO L482 AbstractCegarLoop]: Abstraction has 88454 states and 238599 transitions. [2021-06-05 18:14:47,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 88454 states and 238599 transitions. [2021-06-05 18:14:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:14:47,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:47,937 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:48,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 18:14:48,137 INFO L430 AbstractCegarLoop]: === Iteration 88 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:48,138 INFO L82 PathProgramCache]: Analyzing trace with hash -497589968, now seen corresponding path program 41 times [2021-06-05 18:14:48,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:48,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182400653] [2021-06-05 18:14:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:14:48,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:48,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182400653] [2021-06-05 18:14:48,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182400653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:48,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448389704] [2021-06-05 18:14:48,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:48,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:14:48,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:48,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:14:48,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1050 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:14:49,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448389704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:49,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:49,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:14:49,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005951181] [2021-06-05 18:14:49,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:14:49,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:49,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:14:49,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:14:49,472 INFO L87 Difference]: Start difference. First operand 88454 states and 238599 transitions. Second operand has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:50,050 INFO L93 Difference]: Finished difference Result 117519 states and 312332 transitions. [2021-06-05 18:14:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:14:50,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-06-05 18:14:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:50,204 INFO L225 Difference]: With dead ends: 117519 [2021-06-05 18:14:50,205 INFO L226 Difference]: Without dead ends: 117519 [2021-06-05 18:14:50,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:14:50,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117519 states. [2021-06-05 18:14:51,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117519 to 82834. [2021-06-05 18:14:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82834 states, 82832 states have (on average 2.694707359474599) internal successors, (223208), 82833 states have internal predecessors, (223208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82834 states to 82834 states and 223208 transitions. [2021-06-05 18:14:51,832 INFO L78 Accepts]: Start accepts. Automaton has 82834 states and 223208 transitions. Word has length 419 [2021-06-05 18:14:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:51,833 INFO L482 AbstractCegarLoop]: Abstraction has 82834 states and 223208 transitions. [2021-06-05 18:14:51,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:51,833 INFO L276 IsEmpty]: Start isEmpty. Operand 82834 states and 223208 transitions. [2021-06-05 18:14:52,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:14:52,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:52,370 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:52,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:52,585 INFO L430 AbstractCegarLoop]: === Iteration 89 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:52,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:52,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1704364978, now seen corresponding path program 42 times [2021-06-05 18:14:52,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:52,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11224111] [2021-06-05 18:14:52,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:14:52,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:52,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11224111] [2021-06-05 18:14:52,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11224111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:52,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478095260] [2021-06-05 18:14:52,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:53,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:14:53,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:53,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:14:53,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1050 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:14:53,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478095260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:53,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:53,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:14:53,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648363438] [2021-06-05 18:14:53,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:14:53,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:53,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:14:53,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:14:53,653 INFO L87 Difference]: Start difference. First operand 82834 states and 223208 transitions. Second operand has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:54,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:54,225 INFO L93 Difference]: Finished difference Result 131104 states and 350360 transitions. [2021-06-05 18:14:54,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:14:54,226 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-06-05 18:14:54,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:54,393 INFO L225 Difference]: With dead ends: 131104 [2021-06-05 18:14:54,393 INFO L226 Difference]: Without dead ends: 131104 [2021-06-05 18:14:54,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:14:54,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131104 states. [2021-06-05 18:14:56,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131104 to 84194. [2021-06-05 18:14:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84194 states, 84192 states have (on average 2.6960756366400607) internal successors, (226988), 84193 states have internal predecessors, (226988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:56,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84194 states to 84194 states and 226988 transitions. [2021-06-05 18:14:56,361 INFO L78 Accepts]: Start accepts. Automaton has 84194 states and 226988 transitions. Word has length 419 [2021-06-05 18:14:56,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:56,362 INFO L482 AbstractCegarLoop]: Abstraction has 84194 states and 226988 transitions. [2021-06-05 18:14:56,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:56,362 INFO L276 IsEmpty]: Start isEmpty. Operand 84194 states and 226988 transitions. [2021-06-05 18:14:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:14:56,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:56,458 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:14:56,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 18:14:56,670 INFO L430 AbstractCegarLoop]: === Iteration 90 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:56,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:56,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1815892244, now seen corresponding path program 43 times [2021-06-05 18:14:56,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:56,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901055960] [2021-06-05 18:14:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:14:56,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:56,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901055960] [2021-06-05 18:14:56,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901055960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:56,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303485698] [2021-06-05 18:14:56,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:56,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:14:56,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1050 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:14:57,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303485698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:57,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:57,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:14:57,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897267364] [2021-06-05 18:14:57,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:14:57,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:57,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:14:57,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:14:57,398 INFO L87 Difference]: Start difference. First operand 84194 states and 226988 transitions. Second operand has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:58,297 INFO L93 Difference]: Finished difference Result 126124 states and 336922 transitions. [2021-06-05 18:14:58,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:14:58,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-06-05 18:14:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:58,487 INFO L225 Difference]: With dead ends: 126124 [2021-06-05 18:14:58,487 INFO L226 Difference]: Without dead ends: 126124 [2021-06-05 18:14:58,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:14:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126124 states. [2021-06-05 18:14:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126124 to 84874. [2021-06-05 18:14:59,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84874 states, 84872 states have (on average 2.696743331133943) internal successors, (228878), 84873 states have internal predecessors, (228878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84874 states to 84874 states and 228878 transitions. [2021-06-05 18:15:00,024 INFO L78 Accepts]: Start accepts. Automaton has 84874 states and 228878 transitions. Word has length 419 [2021-06-05 18:15:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:00,024 INFO L482 AbstractCegarLoop]: Abstraction has 84874 states and 228878 transitions. [2021-06-05 18:15:00,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 84874 states and 228878 transitions. [2021-06-05 18:15:00,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:15:00,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:00,131 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:00,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 18:15:00,331 INFO L430 AbstractCegarLoop]: === Iteration 91 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:00,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:00,332 INFO L82 PathProgramCache]: Analyzing trace with hash 161927664, now seen corresponding path program 44 times [2021-06-05 18:15:00,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:00,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256923249] [2021-06-05 18:15:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:15:00,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:00,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256923249] [2021-06-05 18:15:00,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256923249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:00,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674852679] [2021-06-05 18:15:00,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:00,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:15:00,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:00,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:00,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1050 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:15:01,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674852679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:01,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:01,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:15:01,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578854211] [2021-06-05 18:15:01,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:15:01,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:01,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:15:01,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:15:01,067 INFO L87 Difference]: Start difference. First operand 84874 states and 228878 transitions. Second operand has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:01,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:01,984 INFO L93 Difference]: Finished difference Result 125194 states and 334236 transitions. [2021-06-05 18:15:01,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:15:01,984 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-06-05 18:15:01,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:02,154 INFO L225 Difference]: With dead ends: 125194 [2021-06-05 18:15:02,154 INFO L226 Difference]: Without dead ends: 125194 [2021-06-05 18:15:02,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 567.6ms TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:15:02,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125194 states. [2021-06-05 18:15:03,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125194 to 86814. [2021-06-05 18:15:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86814 states, 86812 states have (on average 2.697979541998802) internal successors, (234217), 86813 states have internal predecessors, (234217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86814 states to 86814 states and 234217 transitions. [2021-06-05 18:15:03,911 INFO L78 Accepts]: Start accepts. Automaton has 86814 states and 234217 transitions. Word has length 419 [2021-06-05 18:15:03,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:03,911 INFO L482 AbstractCegarLoop]: Abstraction has 86814 states and 234217 transitions. [2021-06-05 18:15:03,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:03,911 INFO L276 IsEmpty]: Start isEmpty. Operand 86814 states and 234217 transitions. [2021-06-05 18:15:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:15:04,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:04,023 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:04,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:04,223 INFO L430 AbstractCegarLoop]: === Iteration 92 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:04,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:04,224 INFO L82 PathProgramCache]: Analyzing trace with hash 50400398, now seen corresponding path program 45 times [2021-06-05 18:15:04,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:04,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214292867] [2021-06-05 18:15:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:15:04,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:04,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214292867] [2021-06-05 18:15:04,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214292867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:04,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551199038] [2021-06-05 18:15:04,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:05,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:15:05,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:05,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:05,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1050 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:15:05,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551199038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:05,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:05,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:15:05,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726313948] [2021-06-05 18:15:05,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:15:05,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:05,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:15:05,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:15:05,640 INFO L87 Difference]: Start difference. First operand 86814 states and 234217 transitions. Second operand has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:06,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:06,255 INFO L93 Difference]: Finished difference Result 146514 states and 393464 transitions. [2021-06-05 18:15:06,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:15:06,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-06-05 18:15:06,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:06,461 INFO L225 Difference]: With dead ends: 146514 [2021-06-05 18:15:06,461 INFO L226 Difference]: Without dead ends: 146514 [2021-06-05 18:15:06,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 222.1ms TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:15:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146514 states. [2021-06-05 18:15:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146514 to 89434. [2021-06-05 18:15:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89434 states, 89432 states have (on average 2.699771893729314) internal successors, (241446), 89433 states have internal predecessors, (241446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:08,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89434 states to 89434 states and 241446 transitions. [2021-06-05 18:15:08,619 INFO L78 Accepts]: Start accepts. Automaton has 89434 states and 241446 transitions. Word has length 419 [2021-06-05 18:15:08,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:08,620 INFO L482 AbstractCegarLoop]: Abstraction has 89434 states and 241446 transitions. [2021-06-05 18:15:08,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:08,620 INFO L276 IsEmpty]: Start isEmpty. Operand 89434 states and 241446 transitions. [2021-06-05 18:15:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:15:08,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:08,728 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:08,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:08,929 INFO L430 AbstractCegarLoop]: === Iteration 93 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:08,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:08,929 INFO L82 PathProgramCache]: Analyzing trace with hash 5141168, now seen corresponding path program 46 times [2021-06-05 18:15:08,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:08,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406504660] [2021-06-05 18:15:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:15:09,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:09,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406504660] [2021-06-05 18:15:09,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406504660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:09,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758110103] [2021-06-05 18:15:09,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:09,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:15:09,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:09,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:09,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1050 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:15:10,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758110103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:10,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:10,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:15:10,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937656943] [2021-06-05 18:15:10,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:15:10,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:10,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:15:10,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:15:10,115 INFO L87 Difference]: Start difference. First operand 89434 states and 241446 transitions. Second operand has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:11,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:11,033 INFO L93 Difference]: Finished difference Result 123824 states and 331158 transitions. [2021-06-05 18:15:11,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:15:11,034 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-06-05 18:15:11,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:11,194 INFO L225 Difference]: With dead ends: 123824 [2021-06-05 18:15:11,194 INFO L226 Difference]: Without dead ends: 123824 [2021-06-05 18:15:11,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:15:11,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123824 states. [2021-06-05 18:15:12,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123824 to 91374. [2021-06-05 18:15:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91374 states, 91372 states have (on average 2.7008821083045134) internal successors, (246785), 91373 states have internal predecessors, (246785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91374 states to 91374 states and 246785 transitions. [2021-06-05 18:15:12,813 INFO L78 Accepts]: Start accepts. Automaton has 91374 states and 246785 transitions. Word has length 419 [2021-06-05 18:15:12,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:12,813 INFO L482 AbstractCegarLoop]: Abstraction has 91374 states and 246785 transitions. [2021-06-05 18:15:12,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 91374 states and 246785 transitions. [2021-06-05 18:15:12,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:15:12,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:12,929 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:13,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:13,130 INFO L430 AbstractCegarLoop]: === Iteration 94 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:13,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:13,130 INFO L82 PathProgramCache]: Analyzing trace with hash -660651890, now seen corresponding path program 47 times [2021-06-05 18:15:13,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:13,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827200319] [2021-06-05 18:15:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:15:13,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:13,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827200319] [2021-06-05 18:15:13,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827200319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:13,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404374205] [2021-06-05 18:15:13,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:13,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:15:13,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:13,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:13,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:15:14,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404374205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:14,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:14,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:15:14,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262737936] [2021-06-05 18:15:14,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:15:14,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:14,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:15:14,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:15:14,008 INFO L87 Difference]: Start difference. First operand 91374 states and 246785 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:14,419 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-05 18:15:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:14,970 INFO L93 Difference]: Finished difference Result 115689 states and 307540 transitions. [2021-06-05 18:15:14,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:15:14,971 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-06-05 18:15:14,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:15,126 INFO L225 Difference]: With dead ends: 115689 [2021-06-05 18:15:15,126 INFO L226 Difference]: Without dead ends: 115689 [2021-06-05 18:15:15,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 591.7ms TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:15:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115689 states. [2021-06-05 18:15:16,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115689 to 85754. [2021-06-05 18:15:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85754 states, 85752 states have (on average 2.6984093665453868) internal successors, (231394), 85753 states have internal predecessors, (231394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85754 states to 85754 states and 231394 transitions. [2021-06-05 18:15:16,823 INFO L78 Accepts]: Start accepts. Automaton has 85754 states and 231394 transitions. Word has length 419 [2021-06-05 18:15:16,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:16,824 INFO L482 AbstractCegarLoop]: Abstraction has 85754 states and 231394 transitions. [2021-06-05 18:15:16,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:16,824 INFO L276 IsEmpty]: Start isEmpty. Operand 85754 states and 231394 transitions. [2021-06-05 18:15:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:15:16,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:16,928 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:17,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 18:15:17,141 INFO L430 AbstractCegarLoop]: === Iteration 95 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:17,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:17,142 INFO L82 PathProgramCache]: Analyzing trace with hash -772179156, now seen corresponding path program 48 times [2021-06-05 18:15:17,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:17,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421939459] [2021-06-05 18:15:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:15:17,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:17,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421939459] [2021-06-05 18:15:17,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421939459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:17,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583805802] [2021-06-05 18:15:17,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:18,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:15:18,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:18,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:18,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:15:18,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583805802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:18,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:18,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:15:18,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862390304] [2021-06-05 18:15:18,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:15:18,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:18,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:15:18,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:15:18,561 INFO L87 Difference]: Start difference. First operand 85754 states and 231394 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:19,135 INFO L93 Difference]: Finished difference Result 132244 states and 353792 transitions. [2021-06-05 18:15:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:15:19,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-06-05 18:15:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:19,323 INFO L225 Difference]: With dead ends: 132244 [2021-06-05 18:15:19,324 INFO L226 Difference]: Without dead ends: 132244 [2021-06-05 18:15:19,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 219.7ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:15:19,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132244 states. [2021-06-05 18:15:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132244 to 88854. [2021-06-05 18:15:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88854 states, 88852 states have (on average 2.6998491874127764) internal successors, (239887), 88853 states have internal predecessors, (239887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:21,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88854 states to 88854 states and 239887 transitions. [2021-06-05 18:15:21,456 INFO L78 Accepts]: Start accepts. Automaton has 88854 states and 239887 transitions. Word has length 419 [2021-06-05 18:15:21,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:21,457 INFO L482 AbstractCegarLoop]: Abstraction has 88854 states and 239887 transitions. [2021-06-05 18:15:21,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:21,457 INFO L276 IsEmpty]: Start isEmpty. Operand 88854 states and 239887 transitions. [2021-06-05 18:15:21,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:15:21,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:21,560 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:21,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:21,760 INFO L430 AbstractCegarLoop]: === Iteration 96 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:21,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:21,761 INFO L82 PathProgramCache]: Analyzing trace with hash -817438386, now seen corresponding path program 49 times [2021-06-05 18:15:21,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:21,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253682351] [2021-06-05 18:15:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:15:21,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:21,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253682351] [2021-06-05 18:15:21,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253682351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:21,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201171298] [2021-06-05 18:15:21,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:22,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:22,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:15:22,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201171298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:22,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:22,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:15:22,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249691240] [2021-06-05 18:15:22,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:15:22,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:22,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:15:22,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:15:22,504 INFO L87 Difference]: Start difference. First operand 88854 states and 239887 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:23,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:23,436 INFO L93 Difference]: Finished difference Result 133754 states and 358185 transitions. [2021-06-05 18:15:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:15:23,437 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-06-05 18:15:23,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:23,589 INFO L225 Difference]: With dead ends: 133754 [2021-06-05 18:15:23,590 INFO L226 Difference]: Without dead ends: 133754 [2021-06-05 18:15:23,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 221.2ms TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:15:23,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133754 states. [2021-06-05 18:15:25,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133754 to 90114. [2021-06-05 18:15:25,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90114 states, 90112 states have (on average 2.7003728693181817) internal successors, (243336), 90113 states have internal predecessors, (243336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:25,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90114 states to 90114 states and 243336 transitions. [2021-06-05 18:15:25,342 INFO L78 Accepts]: Start accepts. Automaton has 90114 states and 243336 transitions. Word has length 419 [2021-06-05 18:15:25,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:25,342 INFO L482 AbstractCegarLoop]: Abstraction has 90114 states and 243336 transitions. [2021-06-05 18:15:25,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:25,343 INFO L276 IsEmpty]: Start isEmpty. Operand 90114 states and 243336 transitions. [2021-06-05 18:15:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:15:25,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:25,450 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:25,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 18:15:25,653 INFO L430 AbstractCegarLoop]: === Iteration 97 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:25,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:25,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1539942548, now seen corresponding path program 50 times [2021-06-05 18:15:25,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:25,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941474378] [2021-06-05 18:15:25,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:15:25,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:25,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941474378] [2021-06-05 18:15:25,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941474378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:25,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696552407] [2021-06-05 18:15:25,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:25,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:15:25,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:25,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:25,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:26,716 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:15:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:15:26,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696552407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:26,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:26,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:15:26,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146346340] [2021-06-05 18:15:26,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:15:26,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:26,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:15:26,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:15:26,826 INFO L87 Difference]: Start difference. First operand 90114 states and 243336 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:27,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:27,498 INFO L93 Difference]: Finished difference Result 135089 states and 360890 transitions. [2021-06-05 18:15:27,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:15:27,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-06-05 18:15:27,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:27,679 INFO L225 Difference]: With dead ends: 135089 [2021-06-05 18:15:27,679 INFO L226 Difference]: Without dead ends: 135089 [2021-06-05 18:15:27,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:15:27,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135089 states. [2021-06-05 18:15:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135089 to 101354. [2021-06-05 18:15:29,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101354 states, 101352 states have (on average 2.7049688215328755) internal successors, (274154), 101353 states have internal predecessors, (274154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101354 states to 101354 states and 274154 transitions. [2021-06-05 18:15:30,048 INFO L78 Accepts]: Start accepts. Automaton has 101354 states and 274154 transitions. Word has length 419 [2021-06-05 18:15:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:30,048 INFO L482 AbstractCegarLoop]: Abstraction has 101354 states and 274154 transitions. [2021-06-05 18:15:30,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 101354 states and 274154 transitions. [2021-06-05 18:15:30,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:15:30,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:30,176 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:30,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:30,377 INFO L430 AbstractCegarLoop]: === Iteration 98 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:30,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:30,377 INFO L82 PathProgramCache]: Analyzing trace with hash -546109501, now seen corresponding path program 51 times [2021-06-05 18:15:30,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:30,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416751562] [2021-06-05 18:15:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:15:30,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:30,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416751562] [2021-06-05 18:15:30,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416751562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:30,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107084613] [2021-06-05 18:15:30,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:31,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:15:31,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:31,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:31,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1316 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:15:31,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107084613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:31,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:31,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:15:31,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429972961] [2021-06-05 18:15:31,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:15:31,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:31,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:15:31,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:15:31,828 INFO L87 Difference]: Start difference. First operand 101354 states and 274154 transitions. Second operand has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:33,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:33,346 INFO L93 Difference]: Finished difference Result 127459 states and 340229 transitions. [2021-06-05 18:15:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:15:33,346 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:15:33,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:33,633 INFO L225 Difference]: With dead ends: 127459 [2021-06-05 18:15:33,633 INFO L226 Difference]: Without dead ends: 127459 [2021-06-05 18:15:33,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 350.8ms TimeCoverageRelationStatistics Valid=454, Invalid=1186, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:15:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127459 states. [2021-06-05 18:15:35,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127459 to 100674. [2021-06-05 18:15:35,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100674 states, 100672 states have (on average 2.7044659885568976) internal successors, (272264), 100673 states have internal predecessors, (272264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100674 states to 100674 states and 272264 transitions. [2021-06-05 18:15:36,065 INFO L78 Accepts]: Start accepts. Automaton has 100674 states and 272264 transitions. Word has length 424 [2021-06-05 18:15:36,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:36,065 INFO L482 AbstractCegarLoop]: Abstraction has 100674 states and 272264 transitions. [2021-06-05 18:15:36,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 100674 states and 272264 transitions. [2021-06-05 18:15:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:15:36,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:36,233 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:36,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:36,457 INFO L430 AbstractCegarLoop]: === Iteration 99 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:36,457 INFO L82 PathProgramCache]: Analyzing trace with hash -364387231, now seen corresponding path program 52 times [2021-06-05 18:15:36,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:36,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259842864] [2021-06-05 18:15:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:15:36,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:36,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259842864] [2021-06-05 18:15:36,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259842864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:36,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268683761] [2021-06-05 18:15:36,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:37,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:15:37,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:37,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:37,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1316 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:15:38,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268683761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:38,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:38,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:15:38,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948973497] [2021-06-05 18:15:38,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:15:38,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:38,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:15:38,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:15:38,950 INFO L87 Difference]: Start difference. First operand 100674 states and 272264 transitions. Second operand has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:39,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:39,751 INFO L93 Difference]: Finished difference Result 141784 states and 379133 transitions. [2021-06-05 18:15:39,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:15:39,752 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:15:39,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:39,989 INFO L225 Difference]: With dead ends: 141784 [2021-06-05 18:15:39,989 INFO L226 Difference]: Without dead ends: 141784 [2021-06-05 18:15:39,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 328.8ms TimeCoverageRelationStatistics Valid=452, Invalid=1188, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:15:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141784 states. [2021-06-05 18:15:42,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141784 to 100674. [2021-06-05 18:15:42,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100674 states, 100672 states have (on average 2.7044659885568976) internal successors, (272264), 100673 states have internal predecessors, (272264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100674 states to 100674 states and 272264 transitions. [2021-06-05 18:15:42,318 INFO L78 Accepts]: Start accepts. Automaton has 100674 states and 272264 transitions. Word has length 424 [2021-06-05 18:15:42,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:42,318 INFO L482 AbstractCegarLoop]: Abstraction has 100674 states and 272264 transitions. [2021-06-05 18:15:42,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:42,318 INFO L276 IsEmpty]: Start isEmpty. Operand 100674 states and 272264 transitions. [2021-06-05 18:15:42,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:15:42,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:42,450 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:42,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 18:15:42,652 INFO L430 AbstractCegarLoop]: === Iteration 100 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:42,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:42,652 INFO L82 PathProgramCache]: Analyzing trace with hash 244271231, now seen corresponding path program 53 times [2021-06-05 18:15:42,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:42,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627889245] [2021-06-05 18:15:42,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:15:42,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:42,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627889245] [2021-06-05 18:15:42,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627889245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:42,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159155612] [2021-06-05 18:15:42,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:43,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:15:43,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:43,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:43,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1316 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:15:43,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159155612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:43,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:43,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:15:43,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695924820] [2021-06-05 18:15:43,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:15:43,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:43,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:15:43,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:15:43,576 INFO L87 Difference]: Start difference. First operand 100674 states and 272264 transitions. Second operand has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:44,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:44,631 INFO L93 Difference]: Finished difference Result 138584 states and 371877 transitions. [2021-06-05 18:15:44,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:15:44,631 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:15:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:44,825 INFO L225 Difference]: With dead ends: 138584 [2021-06-05 18:15:44,825 INFO L226 Difference]: Without dead ends: 138584 [2021-06-05 18:15:44,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 298.6ms TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:15:45,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138584 states. [2021-06-05 18:15:46,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138584 to 102614. [2021-06-05 18:15:46,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102614 states, 102612 states have (on average 2.7053658441507817) internal successors, (277603), 102613 states have internal predecessors, (277603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102614 states to 102614 states and 277603 transitions. [2021-06-05 18:15:46,770 INFO L78 Accepts]: Start accepts. Automaton has 102614 states and 277603 transitions. Word has length 424 [2021-06-05 18:15:46,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:46,771 INFO L482 AbstractCegarLoop]: Abstraction has 102614 states and 277603 transitions. [2021-06-05 18:15:46,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:46,771 INFO L276 IsEmpty]: Start isEmpty. Operand 102614 states and 277603 transitions. [2021-06-05 18:15:47,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:15:47,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:47,415 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:47,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 18:15:47,645 INFO L430 AbstractCegarLoop]: === Iteration 101 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:47,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:47,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1707283485, now seen corresponding path program 54 times [2021-06-05 18:15:47,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:47,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016423932] [2021-06-05 18:15:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:15:47,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:47,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016423932] [2021-06-05 18:15:47,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016423932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:47,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684809368] [2021-06-05 18:15:47,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:48,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:15:48,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:48,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:48,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1316 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:15:48,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684809368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:48,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:48,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:15:48,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565216683] [2021-06-05 18:15:48,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:15:48,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:48,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:15:48,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:15:48,721 INFO L87 Difference]: Start difference. First operand 102614 states and 277603 transitions. Second operand has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:49,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:49,435 INFO L93 Difference]: Finished difference Result 142859 states and 383220 transitions. [2021-06-05 18:15:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:15:49,435 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:15:49,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:49,627 INFO L225 Difference]: With dead ends: 142859 [2021-06-05 18:15:49,627 INFO L226 Difference]: Without dead ends: 142859 [2021-06-05 18:15:49,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:15:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142859 states. [2021-06-05 18:15:51,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142859 to 103294. [2021-06-05 18:15:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103294 states, 103292 states have (on average 2.705853309065562) internal successors, (279493), 103293 states have internal predecessors, (279493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103294 states to 103294 states and 279493 transitions. [2021-06-05 18:15:51,767 INFO L78 Accepts]: Start accepts. Automaton has 103294 states and 279493 transitions. Word has length 424 [2021-06-05 18:15:51,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:51,768 INFO L482 AbstractCegarLoop]: Abstraction has 103294 states and 279493 transitions. [2021-06-05 18:15:51,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:51,768 INFO L276 IsEmpty]: Start isEmpty. Operand 103294 states and 279493 transitions. [2021-06-05 18:15:51,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:15:51,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:51,903 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:52,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:52,103 INFO L430 AbstractCegarLoop]: === Iteration 102 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:52,104 INFO L82 PathProgramCache]: Analyzing trace with hash 500508475, now seen corresponding path program 55 times [2021-06-05 18:15:52,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:52,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093421956] [2021-06-05 18:15:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:15:52,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:52,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093421956] [2021-06-05 18:15:52,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093421956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:52,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134471175] [2021-06-05 18:15:52,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:52,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:52,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1316 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:15:52,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134471175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:52,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:52,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:15:52,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171776779] [2021-06-05 18:15:52,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:15:52,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:52,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:15:52,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:15:52,876 INFO L87 Difference]: Start difference. First operand 103294 states and 279493 transitions. Second operand has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:54,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:54,062 INFO L93 Difference]: Finished difference Result 138014 states and 369856 transitions. [2021-06-05 18:15:54,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:15:54,062 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:15:54,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:54,252 INFO L225 Difference]: With dead ends: 138014 [2021-06-05 18:15:54,252 INFO L226 Difference]: Without dead ends: 138014 [2021-06-05 18:15:54,252 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:15:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138014 states. [2021-06-05 18:15:56,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138014 to 103974. [2021-06-05 18:15:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:56,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-06-05 18:15:56,919 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-06-05 18:15:56,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:56,919 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-06-05 18:15:56,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:56,920 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-06-05 18:15:57,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:15:57,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:57,105 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:15:57,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 18:15:57,321 INFO L430 AbstractCegarLoop]: === Iteration 103 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:57,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:57,321 INFO L82 PathProgramCache]: Analyzing trace with hash 388981209, now seen corresponding path program 56 times [2021-06-05 18:15:57,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:57,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622844238] [2021-06-05 18:15:57,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:15:57,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:57,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622844238] [2021-06-05 18:15:57,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622844238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:57,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57582143] [2021-06-05 18:15:57,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:57,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:15:57,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:57,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:57,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1316 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:15:58,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57582143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:58,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:58,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:15:58,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35632193] [2021-06-05 18:15:58,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:15:58,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:58,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:15:58,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:15:58,336 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:59,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:59,104 INFO L93 Difference]: Finished difference Result 134679 states and 360853 transitions. [2021-06-05 18:15:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:15:59,104 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:15:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:59,294 INFO L225 Difference]: With dead ends: 134679 [2021-06-05 18:15:59,294 INFO L226 Difference]: Without dead ends: 134679 [2021-06-05 18:15:59,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=496, Invalid=1484, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:15:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134679 states. [2021-06-05 18:16:01,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134679 to 103974. [2021-06-05 18:16:01,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-06-05 18:16:01,367 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-06-05 18:16:01,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:01,367 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-06-05 18:16:01,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:01,367 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-06-05 18:16:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:16:01,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:01,502 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:01,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 18:16:01,703 INFO L430 AbstractCegarLoop]: === Iteration 104 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:01,703 INFO L82 PathProgramCache]: Analyzing trace with hash 2030168195, now seen corresponding path program 57 times [2021-06-05 18:16:01,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:01,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252668044] [2021-06-05 18:16:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:01,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:01,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252668044] [2021-06-05 18:16:01,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252668044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:01,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007045139] [2021-06-05 18:16:01,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:02,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:16:02,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:02,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:02,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:02,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007045139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:02,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:02,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:16:02,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721570838] [2021-06-05 18:16:02,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:16:02,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:02,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:16:02,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:02,770 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:03,275 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-05 18:16:03,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:03,830 INFO L93 Difference]: Finished difference Result 133024 states and 354975 transitions. [2021-06-05 18:16:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:16:03,830 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:16:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:04,008 INFO L225 Difference]: With dead ends: 133024 [2021-06-05 18:16:04,008 INFO L226 Difference]: Without dead ends: 133024 [2021-06-05 18:16:04,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 684.1ms TimeCoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:16:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133024 states. [2021-06-05 18:16:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133024 to 98734. [2021-06-05 18:16:05,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98734 states, 98732 states have (on average 2.703530770165701) internal successors, (266925), 98733 states have internal predecessors, (266925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98734 states to 98734 states and 266925 transitions. [2021-06-05 18:16:06,347 INFO L78 Accepts]: Start accepts. Automaton has 98734 states and 266925 transitions. Word has length 424 [2021-06-05 18:16:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:06,348 INFO L482 AbstractCegarLoop]: Abstraction has 98734 states and 266925 transitions. [2021-06-05 18:16:06,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:06,348 INFO L276 IsEmpty]: Start isEmpty. Operand 98734 states and 266925 transitions. [2021-06-05 18:16:06,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:16:06,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:06,485 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:06,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 18:16:06,685 INFO L430 AbstractCegarLoop]: === Iteration 105 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:06,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1656140639, now seen corresponding path program 58 times [2021-06-05 18:16:06,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:06,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766957308] [2021-06-05 18:16:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:06,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:06,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766957308] [2021-06-05 18:16:06,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766957308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:06,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953794206] [2021-06-05 18:16:06,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:07,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:07,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:07,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:07,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:07,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953794206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:07,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:07,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:16:07,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058455] [2021-06-05 18:16:07,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:16:07,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:07,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:16:07,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:07,889 INFO L87 Difference]: Start difference. First operand 98734 states and 266925 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:08,544 INFO L93 Difference]: Finished difference Result 152384 states and 408740 transitions. [2021-06-05 18:16:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:16:08,545 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:16:08,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:09,065 INFO L225 Difference]: With dead ends: 152384 [2021-06-05 18:16:09,065 INFO L226 Difference]: Without dead ends: 152384 [2021-06-05 18:16:09,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1192, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:16:09,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152384 states. [2021-06-05 18:16:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152384 to 99994. [2021-06-05 18:16:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99994 states, 99992 states have (on average 2.7039563165053204) internal successors, (270374), 99993 states have internal predecessors, (270374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99994 states to 99994 states and 270374 transitions. [2021-06-05 18:16:10,872 INFO L78 Accepts]: Start accepts. Automaton has 99994 states and 270374 transitions. Word has length 424 [2021-06-05 18:16:10,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:10,872 INFO L482 AbstractCegarLoop]: Abstraction has 99994 states and 270374 transitions. [2021-06-05 18:16:10,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 99994 states and 270374 transitions. [2021-06-05 18:16:10,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:16:10,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:10,999 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:11,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:11,199 INFO L430 AbstractCegarLoop]: === Iteration 106 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:11,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:11,200 INFO L82 PathProgramCache]: Analyzing trace with hash -193128385, now seen corresponding path program 59 times [2021-06-05 18:16:11,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:11,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657838491] [2021-06-05 18:16:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:11,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:11,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657838491] [2021-06-05 18:16:11,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657838491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:11,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004689001] [2021-06-05 18:16:11,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:11,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:16:11,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:11,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:11,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:12,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004689001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:12,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:12,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:16:12,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929790819] [2021-06-05 18:16:12,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:16:12,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:12,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:16:12,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:12,573 INFO L87 Difference]: Start difference. First operand 99994 states and 270374 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:13,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:13,244 INFO L93 Difference]: Finished difference Result 152579 states and 409589 transitions. [2021-06-05 18:16:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:16:13,244 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:16:13,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:13,444 INFO L225 Difference]: With dead ends: 152579 [2021-06-05 18:16:13,444 INFO L226 Difference]: Without dead ends: 152579 [2021-06-05 18:16:13,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 294.5ms TimeCoverageRelationStatistics Valid=458, Invalid=1264, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:16:13,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152579 states. [2021-06-05 18:16:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152579 to 98734. [2021-06-05 18:16:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98734 states, 98732 states have (on average 2.703530770165701) internal successors, (266925), 98733 states have internal predecessors, (266925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98734 states to 98734 states and 266925 transitions. [2021-06-05 18:16:15,804 INFO L78 Accepts]: Start accepts. Automaton has 98734 states and 266925 transitions. Word has length 424 [2021-06-05 18:16:15,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:15,804 INFO L482 AbstractCegarLoop]: Abstraction has 98734 states and 266925 transitions. [2021-06-05 18:16:15,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:15,805 INFO L276 IsEmpty]: Start isEmpty. Operand 98734 states and 266925 transitions. [2021-06-05 18:16:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:16:15,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:15,916 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:16,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 18:16:16,116 INFO L430 AbstractCegarLoop]: === Iteration 107 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:16,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1399903395, now seen corresponding path program 60 times [2021-06-05 18:16:16,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:16,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001202881] [2021-06-05 18:16:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:16,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:16,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001202881] [2021-06-05 18:16:16,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001202881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:16,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041601085] [2021-06-05 18:16:16,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:16,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:16:16,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:16,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:16,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:17,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041601085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:17,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:17,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:16:17,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398637322] [2021-06-05 18:16:17,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:16:17,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:17,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:16:17,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:17,183 INFO L87 Difference]: Start difference. First operand 98734 states and 266925 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:18,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:18,246 INFO L93 Difference]: Finished difference Result 147444 states and 395135 transitions. [2021-06-05 18:16:18,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:16:18,247 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:16:18,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:18,446 INFO L225 Difference]: With dead ends: 147444 [2021-06-05 18:16:18,446 INFO L226 Difference]: Without dead ends: 147444 [2021-06-05 18:16:18,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=468, Invalid=1338, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:16:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147444 states. [2021-06-05 18:16:20,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147444 to 99414. [2021-06-05 18:16:20,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99414 states, 99412 states have (on average 2.704049812899851) internal successors, (268815), 99413 states have internal predecessors, (268815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99414 states to 99414 states and 268815 transitions. [2021-06-05 18:16:20,362 INFO L78 Accepts]: Start accepts. Automaton has 99414 states and 268815 transitions. Word has length 424 [2021-06-05 18:16:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:20,362 INFO L482 AbstractCegarLoop]: Abstraction has 99414 states and 268815 transitions. [2021-06-05 18:16:20,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 99414 states and 268815 transitions. [2021-06-05 18:16:20,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:16:20,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:20,504 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:20,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 18:16:20,704 INFO L430 AbstractCegarLoop]: === Iteration 108 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:20,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1511430661, now seen corresponding path program 61 times [2021-06-05 18:16:20,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:20,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919304657] [2021-06-05 18:16:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:21,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:21,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919304657] [2021-06-05 18:16:21,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919304657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:21,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489609504] [2021-06-05 18:16:21,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:21,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:21,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:22,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489609504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:22,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:22,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:16:22,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286997435] [2021-06-05 18:16:22,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:16:22,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:22,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:16:22,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:22,066 INFO L87 Difference]: Start difference. First operand 99414 states and 268815 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:22,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:22,735 INFO L93 Difference]: Finished difference Result 141899 states and 379742 transitions. [2021-06-05 18:16:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:16:22,736 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:16:22,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:22,932 INFO L225 Difference]: With dead ends: 141899 [2021-06-05 18:16:22,932 INFO L226 Difference]: Without dead ends: 141899 [2021-06-05 18:16:22,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 388.5ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:16:23,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141899 states. [2021-06-05 18:16:24,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141899 to 98054. [2021-06-05 18:16:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98054 states, 98052 states have (on average 2.7030045282095214) internal successors, (265035), 98053 states have internal predecessors, (265035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98054 states to 98054 states and 265035 transitions. [2021-06-05 18:16:25,130 INFO L78 Accepts]: Start accepts. Automaton has 98054 states and 265035 transitions. Word has length 424 [2021-06-05 18:16:25,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:25,130 INFO L482 AbstractCegarLoop]: Abstraction has 98054 states and 265035 transitions. [2021-06-05 18:16:25,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:25,130 INFO L276 IsEmpty]: Start isEmpty. Operand 98054 states and 265035 transitions. [2021-06-05 18:16:25,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:16:25,257 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:25,257 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:25,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 18:16:25,458 INFO L430 AbstractCegarLoop]: === Iteration 109 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:25,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:25,458 INFO L82 PathProgramCache]: Analyzing trace with hash 348453187, now seen corresponding path program 62 times [2021-06-05 18:16:25,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:25,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836380789] [2021-06-05 18:16:25,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:25,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:25,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836380789] [2021-06-05 18:16:25,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836380789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:25,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350358758] [2021-06-05 18:16:25,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:25,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:16:25,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:25,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:25,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:26,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350358758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:26,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:26,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:16:26,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581095800] [2021-06-05 18:16:26,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:16:26,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:26,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:16:26,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:26,292 INFO L87 Difference]: Start difference. First operand 98054 states and 265035 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:27,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:27,276 INFO L93 Difference]: Finished difference Result 131684 states and 352100 transitions. [2021-06-05 18:16:27,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:16:27,276 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:16:27,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:27,459 INFO L225 Difference]: With dead ends: 131684 [2021-06-05 18:16:27,459 INFO L226 Difference]: Without dead ends: 131684 [2021-06-05 18:16:27,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:16:27,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131684 states. [2021-06-05 18:16:29,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131684 to 96594. [2021-06-05 18:16:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96594 states, 96592 states have (on average 2.701673016398874) internal successors, (260960), 96593 states have internal predecessors, (260960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96594 states to 96594 states and 260960 transitions. [2021-06-05 18:16:29,309 INFO L78 Accepts]: Start accepts. Automaton has 96594 states and 260960 transitions. Word has length 424 [2021-06-05 18:16:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:29,309 INFO L482 AbstractCegarLoop]: Abstraction has 96594 states and 260960 transitions. [2021-06-05 18:16:29,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 96594 states and 260960 transitions. [2021-06-05 18:16:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:16:29,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:29,874 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:30,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:30,099 INFO L430 AbstractCegarLoop]: === Iteration 110 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:30,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:30,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1811465441, now seen corresponding path program 63 times [2021-06-05 18:16:30,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:30,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543862996] [2021-06-05 18:16:30,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:30,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:30,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543862996] [2021-06-05 18:16:30,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543862996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:30,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265690826] [2021-06-05 18:16:30,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:30,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:16:30,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:30,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:30,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:31,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265690826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:31,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:31,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:16:31,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495905884] [2021-06-05 18:16:31,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:16:31,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:31,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:16:31,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:31,091 INFO L87 Difference]: Start difference. First operand 96594 states and 260960 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:31,835 INFO L93 Difference]: Finished difference Result 175139 states and 471400 transitions. [2021-06-05 18:16:31,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:16:31,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:16:31,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:32,492 INFO L225 Difference]: With dead ends: 175139 [2021-06-05 18:16:32,492 INFO L226 Difference]: Without dead ends: 175139 [2021-06-05 18:16:32,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 289.5ms TimeCoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:16:32,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175139 states. [2021-06-05 18:16:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175139 to 101734. [2021-06-05 18:16:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101734 states, 101732 states have (on average 2.704036094837416) internal successors, (275087), 101733 states have internal predecessors, (275087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101734 states to 101734 states and 275087 transitions. [2021-06-05 18:16:34,401 INFO L78 Accepts]: Start accepts. Automaton has 101734 states and 275087 transitions. Word has length 424 [2021-06-05 18:16:34,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:34,401 INFO L482 AbstractCegarLoop]: Abstraction has 101734 states and 275087 transitions. [2021-06-05 18:16:34,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:34,401 INFO L276 IsEmpty]: Start isEmpty. Operand 101734 states and 275087 transitions. [2021-06-05 18:16:34,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:16:34,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:34,535 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:34,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:34,736 INFO L430 AbstractCegarLoop]: === Iteration 111 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:34,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:34,736 INFO L82 PathProgramCache]: Analyzing trace with hash 604690431, now seen corresponding path program 64 times [2021-06-05 18:16:34,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:34,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324802364] [2021-06-05 18:16:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:34,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:34,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324802364] [2021-06-05 18:16:34,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324802364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:34,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775012750] [2021-06-05 18:16:34,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:35,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:35,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:35,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:35,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:36,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775012750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:36,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:36,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:16:36,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126796332] [2021-06-05 18:16:36,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:16:36,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:36,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:16:36,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:36,329 INFO L87 Difference]: Start difference. First operand 101734 states and 275087 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:37,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:37,099 INFO L93 Difference]: Finished difference Result 173024 states and 465877 transitions. [2021-06-05 18:16:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:16:37,099 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:16:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:37,341 INFO L225 Difference]: With dead ends: 173024 [2021-06-05 18:16:37,342 INFO L226 Difference]: Without dead ends: 173024 [2021-06-05 18:16:37,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=469, Invalid=1337, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:16:37,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173024 states. [2021-06-05 18:16:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173024 to 105034. [2021-06-05 18:16:39,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105034 states, 105032 states have (on average 2.7058991545433773) internal successors, (284206), 105033 states have internal predecessors, (284206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:39,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105034 states to 105034 states and 284206 transitions. [2021-06-05 18:16:39,796 INFO L78 Accepts]: Start accepts. Automaton has 105034 states and 284206 transitions. Word has length 424 [2021-06-05 18:16:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:39,796 INFO L482 AbstractCegarLoop]: Abstraction has 105034 states and 284206 transitions. [2021-06-05 18:16:39,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:39,797 INFO L276 IsEmpty]: Start isEmpty. Operand 105034 states and 284206 transitions. [2021-06-05 18:16:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:16:39,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:39,936 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:40,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:40,136 INFO L430 AbstractCegarLoop]: === Iteration 112 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:40,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:40,137 INFO L82 PathProgramCache]: Analyzing trace with hash 493163165, now seen corresponding path program 65 times [2021-06-05 18:16:40,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:40,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935876624] [2021-06-05 18:16:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:40,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:40,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935876624] [2021-06-05 18:16:40,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935876624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:40,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486475110] [2021-06-05 18:16:40,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:40,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:16:40,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:40,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:40,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:41,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486475110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:41,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:41,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:16:41,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137902976] [2021-06-05 18:16:41,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:16:41,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:41,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:16:41,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:41,178 INFO L87 Difference]: Start difference. First operand 105034 states and 284206 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:42,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:42,318 INFO L93 Difference]: Finished difference Result 161559 states and 434096 transitions. [2021-06-05 18:16:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:16:42,318 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:16:42,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:42,546 INFO L225 Difference]: With dead ends: 161559 [2021-06-05 18:16:42,546 INFO L226 Difference]: Without dead ends: 161559 [2021-06-05 18:16:42,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:16:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161559 states. [2021-06-05 18:16:44,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161559 to 104354. [2021-06-05 18:16:44,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104354 states, 104352 states have (on average 2.705420116528672) internal successors, (282316), 104353 states have internal predecessors, (282316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:44,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104354 states to 104354 states and 282316 transitions. [2021-06-05 18:16:44,992 INFO L78 Accepts]: Start accepts. Automaton has 104354 states and 282316 transitions. Word has length 424 [2021-06-05 18:16:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:44,992 INFO L482 AbstractCegarLoop]: Abstraction has 104354 states and 282316 transitions. [2021-06-05 18:16:44,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 104354 states and 282316 transitions. [2021-06-05 18:16:45,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:16:45,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:45,120 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:45,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 18:16:45,321 INFO L430 AbstractCegarLoop]: === Iteration 113 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:45,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1631045117, now seen corresponding path program 66 times [2021-06-05 18:16:45,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:45,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204056993] [2021-06-05 18:16:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:45,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:45,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204056993] [2021-06-05 18:16:45,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204056993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:45,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714765664] [2021-06-05 18:16:45,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:46,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:16:46,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:46,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:46,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714765664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:46,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:46,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:16:46,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122012268] [2021-06-05 18:16:46,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:16:46,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:46,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:16:46,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:46,529 INFO L87 Difference]: Start difference. First operand 104354 states and 282316 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:47,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:47,561 INFO L93 Difference]: Finished difference Result 139429 states and 373186 transitions. [2021-06-05 18:16:47,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:16:47,561 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:16:47,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:47,758 INFO L225 Difference]: With dead ends: 139429 [2021-06-05 18:16:47,758 INFO L226 Difference]: Without dead ends: 139429 [2021-06-05 18:16:47,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=472, Invalid=1334, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:16:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139429 states. [2021-06-05 18:16:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139429 to 102894. [2021-06-05 18:16:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102894 states, 102892 states have (on average 2.704204408506006) internal successors, (278241), 102893 states have internal predecessors, (278241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102894 states to 102894 states and 278241 transitions. [2021-06-05 18:16:49,646 INFO L78 Accepts]: Start accepts. Automaton has 102894 states and 278241 transitions. Word has length 424 [2021-06-05 18:16:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:49,647 INFO L482 AbstractCegarLoop]: Abstraction has 102894 states and 278241 transitions. [2021-06-05 18:16:49,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 102894 states and 278241 transitions. [2021-06-05 18:16:49,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:16:49,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:49,781 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:49,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 18:16:49,982 INFO L430 AbstractCegarLoop]: === Iteration 114 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:49,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:49,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1457147169, now seen corresponding path program 67 times [2021-06-05 18:16:49,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:49,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753804085] [2021-06-05 18:16:49,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:50,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:50,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753804085] [2021-06-05 18:16:50,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753804085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:50,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913029253] [2021-06-05 18:16:50,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:50,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:50,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:51,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913029253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:51,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:51,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:16:51,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045759801] [2021-06-05 18:16:51,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:16:51,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:51,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:16:51,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:51,425 INFO L87 Difference]: Start difference. First operand 102894 states and 278241 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:52,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:52,165 INFO L93 Difference]: Finished difference Result 191454 states and 515998 transitions. [2021-06-05 18:16:52,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:16:52,165 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:16:52,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:52,841 INFO L225 Difference]: With dead ends: 191454 [2021-06-05 18:16:52,841 INFO L226 Difference]: Without dead ends: 191454 [2021-06-05 18:16:52,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 347.3ms TimeCoverageRelationStatistics Valid=470, Invalid=1336, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:16:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191454 states. [2021-06-05 18:16:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191454 to 107454. [2021-06-05 18:16:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107454 states, 107452 states have (on average 2.7064084428395936) internal successors, (290809), 107453 states have internal predecessors, (290809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:54,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107454 states to 107454 states and 290809 transitions. [2021-06-05 18:16:54,887 INFO L78 Accepts]: Start accepts. Automaton has 107454 states and 290809 transitions. Word has length 424 [2021-06-05 18:16:54,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:54,888 INFO L482 AbstractCegarLoop]: Abstraction has 107454 states and 290809 transitions. [2021-06-05 18:16:54,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:54,888 INFO L276 IsEmpty]: Start isEmpty. Operand 107454 states and 290809 transitions. [2021-06-05 18:16:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:16:55,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:55,030 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:16:55,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 18:16:55,230 INFO L430 AbstractCegarLoop]: === Iteration 115 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:55,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1345619903, now seen corresponding path program 68 times [2021-06-05 18:16:55,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:55,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719714231] [2021-06-05 18:16:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:55,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:55,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719714231] [2021-06-05 18:16:55,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719714231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:55,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738436133] [2021-06-05 18:16:55,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:56,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:16:56,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:56,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:56,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:56,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738436133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:56,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:56,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:16:56,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792516424] [2021-06-05 18:16:56,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:16:56,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:56,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:16:56,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:16:56,557 INFO L87 Difference]: Start difference. First operand 107454 states and 290809 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:57,332 INFO L93 Difference]: Finished difference Result 180589 states and 486060 transitions. [2021-06-05 18:16:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:16:57,332 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:16:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:57,583 INFO L225 Difference]: With dead ends: 180589 [2021-06-05 18:16:57,583 INFO L226 Difference]: Without dead ends: 180589 [2021-06-05 18:16:57,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 746.9ms TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:16:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180589 states. [2021-06-05 18:16:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180589 to 109394. [2021-06-05 18:16:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109394 states, 109392 states have (on average 2.707218078104432) internal successors, (296148), 109393 states have internal predecessors, (296148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:00,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109394 states to 109394 states and 296148 transitions. [2021-06-05 18:17:00,105 INFO L78 Accepts]: Start accepts. Automaton has 109394 states and 296148 transitions. Word has length 424 [2021-06-05 18:17:00,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:00,105 INFO L482 AbstractCegarLoop]: Abstraction has 109394 states and 296148 transitions. [2021-06-05 18:17:00,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 109394 states and 296148 transitions. [2021-06-05 18:17:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:17:00,245 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:00,245 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:00,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 18:17:00,446 INFO L430 AbstractCegarLoop]: === Iteration 116 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:00,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:00,446 INFO L82 PathProgramCache]: Analyzing trace with hash -971527485, now seen corresponding path program 69 times [2021-06-05 18:17:00,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:00,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379260156] [2021-06-05 18:17:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:17:00,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:00,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379260156] [2021-06-05 18:17:00,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379260156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:00,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969047641] [2021-06-05 18:17:00,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:01,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:17:01,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:01,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:01,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:17:02,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969047641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:02,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:02,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:02,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687160253] [2021-06-05 18:17:02,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:02,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:02,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:02,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:02,103 INFO L87 Difference]: Start difference. First operand 109394 states and 296148 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:03,133 INFO L93 Difference]: Finished difference Result 143694 states and 385031 transitions. [2021-06-05 18:17:03,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:17:03,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:17:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:03,366 INFO L225 Difference]: With dead ends: 143694 [2021-06-05 18:17:03,366 INFO L226 Difference]: Without dead ends: 143694 [2021-06-05 18:17:03,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 297.8ms TimeCoverageRelationStatistics Valid=483, Invalid=1409, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:17:03,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143694 states. [2021-06-05 18:17:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143694 to 110654. [2021-06-05 18:17:05,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110654 states, 110652 states have (on average 2.707560640566822) internal successors, (299597), 110653 states have internal predecessors, (299597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110654 states to 110654 states and 299597 transitions. [2021-06-05 18:17:05,415 INFO L78 Accepts]: Start accepts. Automaton has 110654 states and 299597 transitions. Word has length 424 [2021-06-05 18:17:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:05,416 INFO L482 AbstractCegarLoop]: Abstraction has 110654 states and 299597 transitions. [2021-06-05 18:17:05,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 110654 states and 299597 transitions. [2021-06-05 18:17:05,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:17:05,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:05,562 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:05,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 18:17:05,766 INFO L430 AbstractCegarLoop]: === Iteration 117 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:05,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1083054751, now seen corresponding path program 70 times [2021-06-05 18:17:05,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:05,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660633405] [2021-06-05 18:17:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:17:06,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:06,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660633405] [2021-06-05 18:17:06,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660633405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:06,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446482525] [2021-06-05 18:17:06,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:06,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:06,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:06,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:06,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:17:07,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446482525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:07,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:07,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:07,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335014340] [2021-06-05 18:17:07,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:07,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:07,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:07,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:07,231 INFO L87 Difference]: Start difference. First operand 110654 states and 299597 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:08,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:08,002 INFO L93 Difference]: Finished difference Result 188659 states and 508100 transitions. [2021-06-05 18:17:08,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:17:08,002 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:17:08,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:08,690 INFO L225 Difference]: With dead ends: 188659 [2021-06-05 18:17:08,690 INFO L226 Difference]: Without dead ends: 188659 [2021-06-05 18:17:08,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 338.5ms TimeCoverageRelationStatistics Valid=481, Invalid=1411, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:17:08,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188659 states. [2021-06-05 18:17:10,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188659 to 113274. [2021-06-05 18:17:10,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113274 states, 113272 states have (on average 2.7087541493043292) internal successors, (306826), 113273 states have internal predecessors, (306826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113274 states to 113274 states and 306826 transitions. [2021-06-05 18:17:10,805 INFO L78 Accepts]: Start accepts. Automaton has 113274 states and 306826 transitions. Word has length 424 [2021-06-05 18:17:10,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:10,806 INFO L482 AbstractCegarLoop]: Abstraction has 113274 states and 306826 transitions. [2021-06-05 18:17:10,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:10,806 INFO L276 IsEmpty]: Start isEmpty. Operand 113274 states and 306826 transitions. [2021-06-05 18:17:11,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:17:11,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:11,400 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:11,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:11,625 INFO L430 AbstractCegarLoop]: === Iteration 118 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:11,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:11,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1128313981, now seen corresponding path program 71 times [2021-06-05 18:17:11,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:11,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549316798] [2021-06-05 18:17:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:17:11,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549316798] [2021-06-05 18:17:11,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549316798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782787100] [2021-06-05 18:17:11,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:12,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:17:12,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:12,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:12,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:17:12,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782787100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:12,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:12,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:12,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492124052] [2021-06-05 18:17:12,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:12,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:12,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:12,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:12,498 INFO L87 Difference]: Start difference. First operand 113274 states and 306826 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:13,161 INFO L93 Difference]: Finished difference Result 144324 states and 386976 transitions. [2021-06-05 18:17:13,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:17:13,161 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-06-05 18:17:13,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:13,350 INFO L225 Difference]: With dead ends: 144324 [2021-06-05 18:17:13,350 INFO L226 Difference]: Without dead ends: 144324 [2021-06-05 18:17:13,350 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=494, Invalid=1486, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:17:13,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144324 states. [2021-06-05 18:17:15,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144324 to 115214. [2021-06-05 18:17:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115214 states, 115212 states have (on average 2.709483387147172) internal successors, (312165), 115213 states have internal predecessors, (312165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115214 states to 115214 states and 312165 transitions. [2021-06-05 18:17:15,694 INFO L78 Accepts]: Start accepts. Automaton has 115214 states and 312165 transitions. Word has length 424 [2021-06-05 18:17:15,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:15,694 INFO L482 AbstractCegarLoop]: Abstraction has 115214 states and 312165 transitions. [2021-06-05 18:17:15,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:15,694 INFO L276 IsEmpty]: Start isEmpty. Operand 115214 states and 312165 transitions. [2021-06-05 18:17:15,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2021-06-05 18:17:15,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:15,850 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:16,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 18:17:16,053 INFO L430 AbstractCegarLoop]: === Iteration 119 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:16,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1370718820, now seen corresponding path program 11 times [2021-06-05 18:17:16,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:16,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287157833] [2021-06-05 18:17:16,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:16,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:16,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287157833] [2021-06-05 18:17:16,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287157833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:16,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804429504] [2021-06-05 18:17:16,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:17,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:17:17,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:17,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:17,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:17,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804429504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:17,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:17,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-06-05 18:17:17,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832674609] [2021-06-05 18:17:17,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:17:17,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:17:17,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:17:17,783 INFO L87 Difference]: Start difference. First operand 115214 states and 312165 transitions. Second operand has 27 states, 27 states have (on average 17.59259259259259) internal successors, (475), 27 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:18,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:18,552 INFO L93 Difference]: Finished difference Result 127423 states and 343370 transitions. [2021-06-05 18:17:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:17:18,552 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 17.59259259259259) internal successors, (475), 27 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 428 [2021-06-05 18:17:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:18,727 INFO L225 Difference]: With dead ends: 127423 [2021-06-05 18:17:18,727 INFO L226 Difference]: Without dead ends: 127423 [2021-06-05 18:17:18,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 889.4ms TimeCoverageRelationStatistics Valid=841, Invalid=1709, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:17:18,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127423 states. [2021-06-05 18:17:20,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127423 to 117696. [2021-06-05 18:17:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117696 states, 117694 states have (on average 2.7075721787006986) internal successors, (318665), 117695 states have internal predecessors, (318665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:20,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117696 states to 117696 states and 318665 transitions. [2021-06-05 18:17:20,988 INFO L78 Accepts]: Start accepts. Automaton has 117696 states and 318665 transitions. Word has length 428 [2021-06-05 18:17:20,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:20,989 INFO L482 AbstractCegarLoop]: Abstraction has 117696 states and 318665 transitions. [2021-06-05 18:17:20,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 17.59259259259259) internal successors, (475), 27 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand 117696 states and 318665 transitions. [2021-06-05 18:17:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:17:21,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:21,135 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:21,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:21,336 INFO L430 AbstractCegarLoop]: === Iteration 120 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:21,336 INFO L82 PathProgramCache]: Analyzing trace with hash 508400118, now seen corresponding path program 35 times [2021-06-05 18:17:21,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:21,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584544216] [2021-06-05 18:17:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1669 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:17:21,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:21,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584544216] [2021-06-05 18:17:21,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584544216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:21,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310298184] [2021-06-05 18:17:21,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:21,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:17:21,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:21,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:21,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:17:22,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310298184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:22,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:22,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 24 [2021-06-05 18:17:22,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788725593] [2021-06-05 18:17:22,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:17:22,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:22,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:17:22,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:17:22,856 INFO L87 Difference]: Start difference. First operand 117696 states and 318665 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:23,558 INFO L93 Difference]: Finished difference Result 134006 states and 360130 transitions. [2021-06-05 18:17:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:17:23,559 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-06-05 18:17:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:23,731 INFO L225 Difference]: With dead ends: 134006 [2021-06-05 18:17:23,731 INFO L226 Difference]: Without dead ends: 134006 [2021-06-05 18:17:23,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=629, Invalid=1441, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:17:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134006 states. [2021-06-05 18:17:25,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134006 to 118376. [2021-06-05 18:17:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118376 states, 118374 states have (on average 2.707984861540541) internal successors, (320555), 118375 states have internal predecessors, (320555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:26,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118376 states to 118376 states and 320555 transitions. [2021-06-05 18:17:26,180 INFO L78 Accepts]: Start accepts. Automaton has 118376 states and 320555 transitions. Word has length 429 [2021-06-05 18:17:26,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:26,180 INFO L482 AbstractCegarLoop]: Abstraction has 118376 states and 320555 transitions. [2021-06-05 18:17:26,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:26,181 INFO L276 IsEmpty]: Start isEmpty. Operand 118376 states and 320555 transitions. [2021-06-05 18:17:26,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:17:26,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:26,324 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:26,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:26,525 INFO L430 AbstractCegarLoop]: === Iteration 121 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:26,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:26,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1794512916, now seen corresponding path program 36 times [2021-06-05 18:17:26,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:26,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341910192] [2021-06-05 18:17:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:17:26,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:26,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341910192] [2021-06-05 18:17:26,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341910192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:26,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283020375] [2021-06-05 18:17:26,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:27,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:17:27,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:27,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:27,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:17:27,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283020375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:27,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:27,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:17:27,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821969760] [2021-06-05 18:17:27,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:17:27,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:27,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:17:27,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:17:27,697 INFO L87 Difference]: Start difference. First operand 118376 states and 320555 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:28,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:28,791 INFO L93 Difference]: Finished difference Result 141701 states and 379687 transitions. [2021-06-05 18:17:28,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:17:28,791 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-06-05 18:17:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:28,973 INFO L225 Difference]: With dead ends: 141701 [2021-06-05 18:17:28,973 INFO L226 Difference]: Without dead ends: 141701 [2021-06-05 18:17:28,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=627, Invalid=1443, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:17:29,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141701 states. [2021-06-05 18:17:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141701 to 117696. [2021-06-05 18:17:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117696 states, 117694 states have (on average 2.7075721787006986) internal successors, (318665), 117695 states have internal predecessors, (318665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117696 states to 117696 states and 318665 transitions. [2021-06-05 18:17:31,447 INFO L78 Accepts]: Start accepts. Automaton has 117696 states and 318665 transitions. Word has length 429 [2021-06-05 18:17:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:31,448 INFO L482 AbstractCegarLoop]: Abstraction has 117696 states and 318665 transitions. [2021-06-05 18:17:31,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:31,448 INFO L276 IsEmpty]: Start isEmpty. Operand 117696 states and 318665 transitions. [2021-06-05 18:17:31,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:17:31,588 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:31,588 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:31,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-06-05 18:17:31,795 INFO L430 AbstractCegarLoop]: === Iteration 122 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:31,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:31,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1400079794, now seen corresponding path program 37 times [2021-06-05 18:17:31,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:31,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751553726] [2021-06-05 18:17:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:17:32,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:32,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751553726] [2021-06-05 18:17:32,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751553726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:32,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246504412] [2021-06-05 18:17:32,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:32,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:32,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:17:32,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246504412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:32,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:32,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:17:32,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986424436] [2021-06-05 18:17:32,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:17:32,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:32,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:17:32,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:17:32,614 INFO L87 Difference]: Start difference. First operand 117696 states and 318665 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:33,697 INFO L93 Difference]: Finished difference Result 143841 states and 386037 transitions. [2021-06-05 18:17:33,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:17:33,698 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-06-05 18:17:33,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:33,912 INFO L225 Difference]: With dead ends: 143841 [2021-06-05 18:17:33,912 INFO L226 Difference]: Without dead ends: 143841 [2021-06-05 18:17:33,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=639, Invalid=1523, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:17:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143841 states. [2021-06-05 18:17:35,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143841 to 117016. [2021-06-05 18:17:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117016 states, 117014 states have (on average 2.707154699437674) internal successors, (316775), 117015 states have internal predecessors, (316775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117016 states to 117016 states and 316775 transitions. [2021-06-05 18:17:35,898 INFO L78 Accepts]: Start accepts. Automaton has 117016 states and 316775 transitions. Word has length 429 [2021-06-05 18:17:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:35,899 INFO L482 AbstractCegarLoop]: Abstraction has 117016 states and 316775 transitions. [2021-06-05 18:17:35,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 117016 states and 316775 transitions. [2021-06-05 18:17:36,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:17:36,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:36,497 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:36,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:36,713 INFO L430 AbstractCegarLoop]: === Iteration 123 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:36,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:36,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1742191312, now seen corresponding path program 38 times [2021-06-05 18:17:36,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:36,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26933732] [2021-06-05 18:17:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:17:36,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:36,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26933732] [2021-06-05 18:17:36,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26933732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:36,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448784051] [2021-06-05 18:17:36,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:37,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:37,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:37,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:37,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:17:37,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448784051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:37,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:37,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:17:37,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769879816] [2021-06-05 18:17:37,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:17:37,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:37,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:17:37,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:17:37,533 INFO L87 Difference]: Start difference. First operand 117016 states and 316775 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:38,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:38,278 INFO L93 Difference]: Finished difference Result 148126 states and 396802 transitions. [2021-06-05 18:17:38,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:17:38,279 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-06-05 18:17:38,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:38,872 INFO L225 Difference]: With dead ends: 148126 [2021-06-05 18:17:38,872 INFO L226 Difference]: Without dead ends: 148126 [2021-06-05 18:17:38,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=651, Invalid=1605, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:17:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148126 states. [2021-06-05 18:17:40,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148126 to 115656. [2021-06-05 18:17:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115656 states, 115654 states have (on average 2.706305013229114) internal successors, (312995), 115655 states have internal predecessors, (312995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:40,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115656 states to 115656 states and 312995 transitions. [2021-06-05 18:17:40,817 INFO L78 Accepts]: Start accepts. Automaton has 115656 states and 312995 transitions. Word has length 429 [2021-06-05 18:17:40,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:40,817 INFO L482 AbstractCegarLoop]: Abstraction has 115656 states and 312995 transitions. [2021-06-05 18:17:40,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:40,817 INFO L276 IsEmpty]: Start isEmpty. Operand 115656 states and 312995 transitions. [2021-06-05 18:17:40,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:17:40,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:40,963 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:41,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:41,164 INFO L430 AbstractCegarLoop]: === Iteration 124 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:41,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:41,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1923913582, now seen corresponding path program 39 times [2021-06-05 18:17:41,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:41,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986645740] [2021-06-05 18:17:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:17:41,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:41,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986645740] [2021-06-05 18:17:41,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986645740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:41,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711548518] [2021-06-05 18:17:41,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:42,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:17:42,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:42,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:17:42,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711548518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:42,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:42,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:17:42,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004823581] [2021-06-05 18:17:42,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:17:42,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:42,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:17:42,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:17:42,959 INFO L87 Difference]: Start difference. First operand 115656 states and 312995 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:43,702 INFO L93 Difference]: Finished difference Result 152051 states and 406986 transitions. [2021-06-05 18:17:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:17:43,702 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-06-05 18:17:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:43,904 INFO L225 Difference]: With dead ends: 152051 [2021-06-05 18:17:43,904 INFO L226 Difference]: Without dead ends: 152051 [2021-06-05 18:17:43,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=663, Invalid=1689, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:17:44,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152051 states. [2021-06-05 18:17:45,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152051 to 116236. [2021-06-05 18:17:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116236 states, 116234 states have (on average 2.7062133282860437) internal successors, (314554), 116235 states have internal predecessors, (314554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:46,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116236 states to 116236 states and 314554 transitions. [2021-06-05 18:17:46,299 INFO L78 Accepts]: Start accepts. Automaton has 116236 states and 314554 transitions. Word has length 429 [2021-06-05 18:17:46,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:46,299 INFO L482 AbstractCegarLoop]: Abstraction has 116236 states and 314554 transitions. [2021-06-05 18:17:46,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:46,299 INFO L276 IsEmpty]: Start isEmpty. Operand 116236 states and 314554 transitions. [2021-06-05 18:17:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:17:46,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:46,447 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:46,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 18:17:46,647 INFO L430 AbstractCegarLoop]: === Iteration 125 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:46,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:46,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1762395252, now seen corresponding path program 40 times [2021-06-05 18:17:46,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:46,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72156368] [2021-06-05 18:17:46,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:17:46,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:46,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72156368] [2021-06-05 18:17:46,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72156368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:46,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15838737] [2021-06-05 18:17:46,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:47,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:47,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:47,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:47,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:17:48,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15838737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:48,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:48,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:17:48,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622501406] [2021-06-05 18:17:48,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:17:48,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:48,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:17:48,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:17:48,471 INFO L87 Difference]: Start difference. First operand 116236 states and 314554 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:49,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:49,224 INFO L93 Difference]: Finished difference Result 153516 states and 410830 transitions. [2021-06-05 18:17:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:17:49,224 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-06-05 18:17:49,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:49,423 INFO L225 Difference]: With dead ends: 153516 [2021-06-05 18:17:49,423 INFO L226 Difference]: Without dead ends: 153516 [2021-06-05 18:17:49,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 376.4ms TimeCoverageRelationStatistics Valid=675, Invalid=1775, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:17:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153516 states. [2021-06-05 18:17:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153516 to 114976. [2021-06-05 18:17:51,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114976 states, 114974 states have (on average 2.7058726320733384) internal successors, (311105), 114975 states have internal predecessors, (311105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114976 states to 114976 states and 311105 transitions. [2021-06-05 18:17:51,818 INFO L78 Accepts]: Start accepts. Automaton has 114976 states and 311105 transitions. Word has length 429 [2021-06-05 18:17:51,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:51,818 INFO L482 AbstractCegarLoop]: Abstraction has 114976 states and 311105 transitions. [2021-06-05 18:17:51,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:51,819 INFO L276 IsEmpty]: Start isEmpty. Operand 114976 states and 311105 transitions. [2021-06-05 18:17:51,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:17:51,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:51,967 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:52,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:52,167 INFO L430 AbstractCegarLoop]: === Iteration 126 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:52,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:52,168 INFO L82 PathProgramCache]: Analyzing trace with hash -299382998, now seen corresponding path program 41 times [2021-06-05 18:17:52,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:52,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859361371] [2021-06-05 18:17:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:17:52,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:52,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859361371] [2021-06-05 18:17:52,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859361371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:52,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648994211] [2021-06-05 18:17:52,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:52,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:17:52,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:52,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:52,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:17:53,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648994211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:53,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:53,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:17:53,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707382218] [2021-06-05 18:17:53,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:17:53,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:53,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:17:53,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:17:53,714 INFO L87 Difference]: Start difference. First operand 114976 states and 311105 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:54,498 INFO L93 Difference]: Finished difference Result 152841 states and 409174 transitions. [2021-06-05 18:17:54,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:17:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-06-05 18:17:54,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:54,697 INFO L225 Difference]: With dead ends: 152841 [2021-06-05 18:17:54,698 INFO L226 Difference]: Without dead ends: 152841 [2021-06-05 18:17:54,698 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 385.6ms TimeCoverageRelationStatistics Valid=687, Invalid=1863, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:17:54,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152841 states. [2021-06-05 18:17:56,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152841 to 113716. [2021-06-05 18:17:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113716 states, 113714 states have (on average 2.7055243857396625) internal successors, (307656), 113715 states have internal predecessors, (307656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:57,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113716 states to 113716 states and 307656 transitions. [2021-06-05 18:17:57,141 INFO L78 Accepts]: Start accepts. Automaton has 113716 states and 307656 transitions. Word has length 429 [2021-06-05 18:17:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:57,141 INFO L482 AbstractCegarLoop]: Abstraction has 113716 states and 307656 transitions. [2021-06-05 18:17:57,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 113716 states and 307656 transitions. [2021-06-05 18:17:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:17:57,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:57,281 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:57,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 18:17:57,481 INFO L430 AbstractCegarLoop]: === Iteration 127 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:57,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:57,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1506158008, now seen corresponding path program 42 times [2021-06-05 18:17:57,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:57,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716440393] [2021-06-05 18:17:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:17:57,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:57,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716440393] [2021-06-05 18:17:57,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716440393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:57,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257692881] [2021-06-05 18:17:57,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:58,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:17:58,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:58,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:58,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:17:58,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257692881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:58,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:58,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:17:58,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631785369] [2021-06-05 18:17:58,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:17:58,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:58,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:17:58,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:17:58,601 INFO L87 Difference]: Start difference. First operand 113716 states and 307656 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:59,799 INFO L93 Difference]: Finished difference Result 147066 states and 393838 transitions. [2021-06-05 18:17:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:17:59,799 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-06-05 18:17:59,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:59,995 INFO L225 Difference]: With dead ends: 147066 [2021-06-05 18:17:59,995 INFO L226 Difference]: Without dead ends: 147066 [2021-06-05 18:17:59,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 422.0ms TimeCoverageRelationStatistics Valid=699, Invalid=1953, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:18:00,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147066 states. [2021-06-05 18:18:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147066 to 113716. [2021-06-05 18:18:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113716 states, 113714 states have (on average 2.7055243857396625) internal successors, (307656), 113715 states have internal predecessors, (307656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113716 states to 113716 states and 307656 transitions. [2021-06-05 18:18:02,336 INFO L78 Accepts]: Start accepts. Automaton has 113716 states and 307656 transitions. Word has length 429 [2021-06-05 18:18:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:02,336 INFO L482 AbstractCegarLoop]: Abstraction has 113716 states and 307656 transitions. [2021-06-05 18:18:02,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 113716 states and 307656 transitions. [2021-06-05 18:18:02,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:18:02,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:02,463 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:02,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:02,665 INFO L430 AbstractCegarLoop]: === Iteration 128 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:02,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1617685274, now seen corresponding path program 43 times [2021-06-05 18:18:02,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:02,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284121310] [2021-06-05 18:18:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:18:02,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:02,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284121310] [2021-06-05 18:18:02,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284121310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:02,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985634404] [2021-06-05 18:18:02,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:03,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:03,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:18:03,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985634404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:03,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:03,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:18:03,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823830909] [2021-06-05 18:18:03,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:18:03,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:03,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:18:03,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:18:03,480 INFO L87 Difference]: Start difference. First operand 113716 states and 307656 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:04,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:04,639 INFO L93 Difference]: Finished difference Result 141826 states and 380190 transitions. [2021-06-05 18:18:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:18:04,639 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-06-05 18:18:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:04,830 INFO L225 Difference]: With dead ends: 141826 [2021-06-05 18:18:04,831 INFO L226 Difference]: Without dead ends: 141826 [2021-06-05 18:18:04,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 413.7ms TimeCoverageRelationStatistics Valid=711, Invalid=2045, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:18:05,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141826 states. [2021-06-05 18:18:06,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141826 to 110996. [2021-06-05 18:18:06,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110996 states, 110994 states have (on average 2.7037137142548247) internal successors, (300096), 110995 states have internal predecessors, (300096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110996 states to 110996 states and 300096 transitions. [2021-06-05 18:18:07,205 INFO L78 Accepts]: Start accepts. Automaton has 110996 states and 300096 transitions. Word has length 429 [2021-06-05 18:18:07,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:07,205 INFO L482 AbstractCegarLoop]: Abstraction has 110996 states and 300096 transitions. [2021-06-05 18:18:07,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:07,205 INFO L276 IsEmpty]: Start isEmpty. Operand 110996 states and 300096 transitions. [2021-06-05 18:18:07,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-06-05 18:18:07,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:07,398 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:07,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 18:18:07,613 INFO L430 AbstractCegarLoop]: === Iteration 129 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:07,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:07,613 INFO L82 PathProgramCache]: Analyzing trace with hash 709857022, now seen corresponding path program 72 times [2021-06-05 18:18:07,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:07,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836310184] [2021-06-05 18:18:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 24 proven. 1124 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-06-05 18:18:07,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:07,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836310184] [2021-06-05 18:18:07,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836310184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:07,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290709266] [2021-06-05 18:18:07,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:08,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:18:08,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:08,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:18:08,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 24 proven. 1100 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-06-05 18:18:09,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290709266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:09,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:09,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:18:09,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467802557] [2021-06-05 18:18:09,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:18:09,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:09,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:18:09,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:18:09,030 INFO L87 Difference]: Start difference. First operand 110996 states and 300096 transitions. Second operand has 17 states, 17 states have (on average 21.647058823529413) internal successors, (368), 17 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:10,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:10,158 INFO L93 Difference]: Finished difference Result 202896 states and 543282 transitions. [2021-06-05 18:18:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:18:10,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.647058823529413) internal successors, (368), 17 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 448 [2021-06-05 18:18:10,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:10,455 INFO L225 Difference]: With dead ends: 202896 [2021-06-05 18:18:10,455 INFO L226 Difference]: Without dead ends: 202896 [2021-06-05 18:18:10,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 250.7ms TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:18:10,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202896 states. [2021-06-05 18:18:12,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202896 to 136196. [2021-06-05 18:18:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136196 states, 136194 states have (on average 2.711250128493179) internal successors, (369256), 136195 states have internal predecessors, (369256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:13,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136196 states to 136196 states and 369256 transitions. [2021-06-05 18:18:13,211 INFO L78 Accepts]: Start accepts. Automaton has 136196 states and 369256 transitions. Word has length 448 [2021-06-05 18:18:13,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:13,211 INFO L482 AbstractCegarLoop]: Abstraction has 136196 states and 369256 transitions. [2021-06-05 18:18:13,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.647058823529413) internal successors, (368), 17 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:13,211 INFO L276 IsEmpty]: Start isEmpty. Operand 136196 states and 369256 transitions. [2021-06-05 18:18:13,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:18:13,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:13,382 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:13,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:13,582 INFO L430 AbstractCegarLoop]: === Iteration 130 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:13,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:13,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1241099505, now seen corresponding path program 73 times [2021-06-05 18:18:13,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:13,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890372460] [2021-06-05 18:18:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:18:14,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:14,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890372460] [2021-06-05 18:18:14,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890372460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:14,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49217878] [2021-06-05 18:18:14,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:18:14,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:18:15,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49217878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:15,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:15,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:18:15,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157604098] [2021-06-05 18:18:15,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:15,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:15,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:15,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:15,042 INFO L87 Difference]: Start difference. First operand 136196 states and 369256 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:15,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:15,733 INFO L93 Difference]: Finished difference Result 170241 states and 455421 transitions. [2021-06-05 18:18:15,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:18:15,733 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:18:15,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:15,949 INFO L225 Difference]: With dead ends: 170241 [2021-06-05 18:18:15,949 INFO L226 Difference]: Without dead ends: 170241 [2021-06-05 18:18:15,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 770.4ms TimeCoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:18:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170241 states. [2021-06-05 18:18:18,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170241 to 130576. [2021-06-05 18:18:18,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130576 states, 130574 states have (on average 2.710072449339072) internal successors, (353865), 130575 states have internal predecessors, (353865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130576 states to 130576 states and 353865 transitions. [2021-06-05 18:18:18,613 INFO L78 Accepts]: Start accepts. Automaton has 130576 states and 353865 transitions. Word has length 453 [2021-06-05 18:18:18,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:18,614 INFO L482 AbstractCegarLoop]: Abstraction has 130576 states and 353865 transitions. [2021-06-05 18:18:18,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 130576 states and 353865 transitions. [2021-06-05 18:18:18,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:18:18,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:18,774 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:18,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 18:18:18,977 INFO L430 AbstractCegarLoop]: === Iteration 131 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:18,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:18,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1590855537, now seen corresponding path program 74 times [2021-06-05 18:18:18,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:18,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072749603] [2021-06-05 18:18:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:18:19,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:19,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072749603] [2021-06-05 18:18:19,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072749603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:19,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654245134] [2021-06-05 18:18:19,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:19,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:19,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:20,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:18:20,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:18:20,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654245134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:20,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:20,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:18:20,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356822535] [2021-06-05 18:18:20,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:20,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:20,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:20,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:20,485 INFO L87 Difference]: Start difference. First operand 130576 states and 353865 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:21,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:21,219 INFO L93 Difference]: Finished difference Result 196376 states and 528037 transitions. [2021-06-05 18:18:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:18:21,220 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:18:21,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:21,947 INFO L225 Difference]: With dead ends: 196376 [2021-06-05 18:18:21,947 INFO L226 Difference]: Without dead ends: 196376 [2021-06-05 18:18:21,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 283.0ms TimeCoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:18:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196376 states. [2021-06-05 18:18:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196376 to 131936. [2021-06-05 18:18:23,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131936 states, 131934 states have (on average 2.710787211787712) internal successors, (357645), 131935 states have internal predecessors, (357645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131936 states to 131936 states and 357645 transitions. [2021-06-05 18:18:24,588 INFO L78 Accepts]: Start accepts. Automaton has 131936 states and 357645 transitions. Word has length 453 [2021-06-05 18:18:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:24,589 INFO L482 AbstractCegarLoop]: Abstraction has 131936 states and 357645 transitions. [2021-06-05 18:18:24,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 131936 states and 357645 transitions. [2021-06-05 18:18:24,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:18:24,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:24,802 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:25,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:25,005 INFO L430 AbstractCegarLoop]: === Iteration 132 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:25,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1497336749, now seen corresponding path program 75 times [2021-06-05 18:18:25,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:25,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157616860] [2021-06-05 18:18:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:18:25,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:25,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157616860] [2021-06-05 18:18:25,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157616860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:25,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235579118] [2021-06-05 18:18:25,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:25,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:18:25,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:25,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:18:25,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:18:26,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235579118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:26,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:26,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:18:26,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147435853] [2021-06-05 18:18:26,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:26,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:26,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:26,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:26,316 INFO L87 Difference]: Start difference. First operand 131936 states and 357645 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:27,555 INFO L93 Difference]: Finished difference Result 193486 states and 520515 transitions. [2021-06-05 18:18:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:18:27,556 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:18:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:27,809 INFO L225 Difference]: With dead ends: 193486 [2021-06-05 18:18:27,810 INFO L226 Difference]: Without dead ends: 193486 [2021-06-05 18:18:27,810 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:18:28,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193486 states. [2021-06-05 18:18:30,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193486 to 132616. [2021-06-05 18:18:30,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132616 states, 132614 states have (on average 2.7111390954197896) internal successors, (359535), 132615 states have internal predecessors, (359535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132616 states to 132616 states and 359535 transitions. [2021-06-05 18:18:30,475 INFO L78 Accepts]: Start accepts. Automaton has 132616 states and 359535 transitions. Word has length 453 [2021-06-05 18:18:30,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:30,475 INFO L482 AbstractCegarLoop]: Abstraction has 132616 states and 359535 transitions. [2021-06-05 18:18:30,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 132616 states and 359535 transitions. [2021-06-05 18:18:30,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:18:30,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:30,631 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:30,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:30,832 INFO L430 AbstractCegarLoop]: === Iteration 133 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:30,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:30,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1385809483, now seen corresponding path program 76 times [2021-06-05 18:18:30,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:30,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141489503] [2021-06-05 18:18:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:18:31,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:31,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141489503] [2021-06-05 18:18:31,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141489503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:31,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035622326] [2021-06-05 18:18:31,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:31,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:31,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:31,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:18:31,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:18:31,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035622326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:31,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:31,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:18:31,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924385853] [2021-06-05 18:18:31,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:31,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:31,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:31,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:31,785 INFO L87 Difference]: Start difference. First operand 132616 states and 359535 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:32,968 INFO L93 Difference]: Finished difference Result 184421 states and 495362 transitions. [2021-06-05 18:18:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:18:32,968 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:18:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:33,205 INFO L225 Difference]: With dead ends: 184421 [2021-06-05 18:18:33,205 INFO L226 Difference]: Without dead ends: 184421 [2021-06-05 18:18:33,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 715.4ms TimeCoverageRelationStatistics Valid=417, Invalid=1305, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:18:33,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184421 states. [2021-06-05 18:18:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184421 to 133296. [2021-06-05 18:18:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133296 states, 133294 states have (on average 2.71148738877969) internal successors, (361425), 133295 states have internal predecessors, (361425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133296 states to 133296 states and 361425 transitions. [2021-06-05 18:18:35,868 INFO L78 Accepts]: Start accepts. Automaton has 133296 states and 361425 transitions. Word has length 453 [2021-06-05 18:18:35,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:35,868 INFO L482 AbstractCegarLoop]: Abstraction has 133296 states and 361425 transitions. [2021-06-05 18:18:35,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 133296 states and 361425 transitions. [2021-06-05 18:18:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:18:36,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:36,031 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:36,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:36,232 INFO L430 AbstractCegarLoop]: === Iteration 134 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:36,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:36,232 INFO L82 PathProgramCache]: Analyzing trace with hash -738398799, now seen corresponding path program 77 times [2021-06-05 18:18:36,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:36,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470762153] [2021-06-05 18:18:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:18:36,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:36,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470762153] [2021-06-05 18:18:36,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470762153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:36,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505532033] [2021-06-05 18:18:36,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:36,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:18:36,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:36,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:18:36,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:37,323 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:18:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:18:37,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505532033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:37,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:37,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:18:37,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099395391] [2021-06-05 18:18:37,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:37,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:37,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:37,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:37,858 INFO L87 Difference]: Start difference. First operand 133296 states and 361425 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:38,635 INFO L93 Difference]: Finished difference Result 189526 states and 509288 transitions. [2021-06-05 18:18:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:18:38,635 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:18:38,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:38,896 INFO L225 Difference]: With dead ends: 189526 [2021-06-05 18:18:38,897 INFO L226 Difference]: Without dead ends: 189526 [2021-06-05 18:18:38,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:18:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189526 states. [2021-06-05 18:18:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189526 to 132516. [2021-06-05 18:18:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132516 states, 132514 states have (on average 2.71095884208461) internal successors, (359240), 132515 states have internal predecessors, (359240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132516 states to 132516 states and 359240 transitions. [2021-06-05 18:18:41,728 INFO L78 Accepts]: Start accepts. Automaton has 132516 states and 359240 transitions. Word has length 453 [2021-06-05 18:18:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:41,728 INFO L482 AbstractCegarLoop]: Abstraction has 132516 states and 359240 transitions. [2021-06-05 18:18:41,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 132516 states and 359240 transitions. [2021-06-05 18:18:42,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:18:42,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:42,367 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:42,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 18:18:42,605 INFO L430 AbstractCegarLoop]: === Iteration 135 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:42,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:42,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1945173809, now seen corresponding path program 78 times [2021-06-05 18:18:42,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:42,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653325786] [2021-06-05 18:18:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:18:42,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:42,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653325786] [2021-06-05 18:18:42,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653325786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:42,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708201742] [2021-06-05 18:18:42,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:43,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:18:43,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:43,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:18:43,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:18:43,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708201742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:43,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:43,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:18:43,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735946068] [2021-06-05 18:18:43,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:43,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:43,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:43,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:43,699 INFO L87 Difference]: Start difference. First operand 132516 states and 359240 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:45,050 INFO L93 Difference]: Finished difference Result 235096 states and 635199 transitions. [2021-06-05 18:18:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:18:45,050 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:18:45,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:45,425 INFO L225 Difference]: With dead ends: 235096 [2021-06-05 18:18:45,425 INFO L226 Difference]: Without dead ends: 235096 [2021-06-05 18:18:45,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:18:45,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235096 states. [2021-06-05 18:18:47,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235096 to 135816. [2021-06-05 18:18:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135816 states, 135814 states have (on average 2.7122314341673173) internal successors, (368359), 135815 states have internal predecessors, (368359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:48,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135816 states to 135816 states and 368359 transitions. [2021-06-05 18:18:48,338 INFO L78 Accepts]: Start accepts. Automaton has 135816 states and 368359 transitions. Word has length 453 [2021-06-05 18:18:48,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:48,338 INFO L482 AbstractCegarLoop]: Abstraction has 135816 states and 368359 transitions. [2021-06-05 18:18:48,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 135816 states and 368359 transitions. [2021-06-05 18:18:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:18:48,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:48,510 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:48,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 18:18:48,721 INFO L430 AbstractCegarLoop]: === Iteration 136 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:48,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:48,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2056701075, now seen corresponding path program 79 times [2021-06-05 18:18:48,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:48,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470736] [2021-06-05 18:18:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:18:48,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:48,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470736] [2021-06-05 18:18:48,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:48,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292221263] [2021-06-05 18:18:48,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:49,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:18:49,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:18:49,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292221263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:49,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:49,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:18:49,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045381278] [2021-06-05 18:18:49,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:49,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:49,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:49,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:49,526 INFO L87 Difference]: Start difference. First operand 135816 states and 368359 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:50,859 INFO L93 Difference]: Finished difference Result 224481 states and 605431 transitions. [2021-06-05 18:18:50,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:18:50,860 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:18:50,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:51,174 INFO L225 Difference]: With dead ends: 224481 [2021-06-05 18:18:51,174 INFO L226 Difference]: Without dead ends: 224481 [2021-06-05 18:18:51,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 721.7ms TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:18:51,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224481 states. [2021-06-05 18:18:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224481 to 135136. [2021-06-05 18:18:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135136 states, 135134 states have (on average 2.7118933799043914) internal successors, (366469), 135135 states have internal predecessors, (366469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135136 states to 135136 states and 366469 transitions. [2021-06-05 18:18:54,158 INFO L78 Accepts]: Start accepts. Automaton has 135136 states and 366469 transitions. Word has length 453 [2021-06-05 18:18:54,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:54,159 INFO L482 AbstractCegarLoop]: Abstraction has 135136 states and 366469 transitions. [2021-06-05 18:18:54,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:54,159 INFO L276 IsEmpty]: Start isEmpty. Operand 135136 states and 366469 transitions. [2021-06-05 18:18:54,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:18:54,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:54,829 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:55,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 18:18:55,054 INFO L430 AbstractCegarLoop]: === Iteration 137 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:55,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:55,054 INFO L82 PathProgramCache]: Analyzing trace with hash -78881167, now seen corresponding path program 80 times [2021-06-05 18:18:55,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:55,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979866245] [2021-06-05 18:18:55,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:18:55,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:55,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979866245] [2021-06-05 18:18:55,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979866245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:55,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284486689] [2021-06-05 18:18:55,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:55,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:55,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:55,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:18:55,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:18:55,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284486689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:55,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:55,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:18:55,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15305747] [2021-06-05 18:18:55,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:55,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:55,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:55,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:55,884 INFO L87 Difference]: Start difference. First operand 135136 states and 366469 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:56,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:56,639 INFO L93 Difference]: Finished difference Result 187456 states and 504450 transitions. [2021-06-05 18:18:56,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:18:56,639 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:18:56,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:57,347 INFO L225 Difference]: With dead ends: 187456 [2021-06-05 18:18:57,347 INFO L226 Difference]: Without dead ends: 187456 [2021-06-05 18:18:57,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:18:57,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187456 states. [2021-06-05 18:18:59,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187456 to 137076. [2021-06-05 18:18:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137076 states, 137074 states have (on average 2.7124618819032054) internal successors, (371808), 137075 states have internal predecessors, (371808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137076 states to 137076 states and 371808 transitions. [2021-06-05 18:19:00,081 INFO L78 Accepts]: Start accepts. Automaton has 137076 states and 371808 transitions. Word has length 453 [2021-06-05 18:19:00,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:00,082 INFO L482 AbstractCegarLoop]: Abstraction has 137076 states and 371808 transitions. [2021-06-05 18:19:00,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 137076 states and 371808 transitions. [2021-06-05 18:19:00,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:19:00,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:00,253 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:00,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 18:19:00,453 INFO L430 AbstractCegarLoop]: === Iteration 138 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:00,454 INFO L82 PathProgramCache]: Analyzing trace with hash -190408433, now seen corresponding path program 81 times [2021-06-05 18:19:00,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:00,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876354822] [2021-06-05 18:19:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:19:00,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:00,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876354822] [2021-06-05 18:19:00,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876354822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:00,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251077306] [2021-06-05 18:19:00,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:01,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:19:01,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:01,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:01,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:19:01,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251077306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:01,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:01,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:19:01,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867275268] [2021-06-05 18:19:01,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:01,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:01,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:01,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:01,564 INFO L87 Difference]: Start difference. First operand 137076 states and 371808 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:02,903 INFO L93 Difference]: Finished difference Result 242811 states and 656248 transitions. [2021-06-05 18:19:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:19:02,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:19:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:03,260 INFO L225 Difference]: With dead ends: 242811 [2021-06-05 18:19:03,261 INFO L226 Difference]: Without dead ends: 242811 [2021-06-05 18:19:03,261 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 300.2ms TimeCoverageRelationStatistics Valid=402, Invalid=1238, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:19:03,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242811 states. [2021-06-05 18:19:06,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242811 to 139696. [2021-06-05 18:19:06,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139696 states, 139694 states have (on average 2.7133377238821996) internal successors, (379037), 139695 states have internal predecessors, (379037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:06,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139696 states to 139696 states and 379037 transitions. [2021-06-05 18:19:06,664 INFO L78 Accepts]: Start accepts. Automaton has 139696 states and 379037 transitions. Word has length 453 [2021-06-05 18:19:06,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:06,664 INFO L482 AbstractCegarLoop]: Abstraction has 139696 states and 379037 transitions. [2021-06-05 18:19:06,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:06,664 INFO L276 IsEmpty]: Start isEmpty. Operand 139696 states and 379037 transitions. [2021-06-05 18:19:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:19:06,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:06,888 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:07,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 18:19:07,108 INFO L430 AbstractCegarLoop]: === Iteration 139 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:07,108 INFO L82 PathProgramCache]: Analyzing trace with hash -235667663, now seen corresponding path program 82 times [2021-06-05 18:19:07,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:07,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128066720] [2021-06-05 18:19:07,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:19:07,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:07,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128066720] [2021-06-05 18:19:07,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128066720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:07,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365115350] [2021-06-05 18:19:07,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:08,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:08,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:08,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:08,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:19:08,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365115350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:08,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:08,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:19:08,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122373144] [2021-06-05 18:19:08,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:08,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:08,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:08,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:08,685 INFO L87 Difference]: Start difference. First operand 139696 states and 379037 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:09,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:09,444 INFO L93 Difference]: Finished difference Result 184031 states and 495027 transitions. [2021-06-05 18:19:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:19:09,444 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:19:09,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:10,165 INFO L225 Difference]: With dead ends: 184031 [2021-06-05 18:19:10,165 INFO L226 Difference]: Without dead ends: 184031 [2021-06-05 18:19:10,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 345.1ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:19:10,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184031 states. [2021-06-05 18:19:12,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184031 to 141636. [2021-06-05 18:19:12,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141636 states, 141634 states have (on average 2.7138681390061707) internal successors, (384376), 141635 states have internal predecessors, (384376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:12,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141636 states to 141636 states and 384376 transitions. [2021-06-05 18:19:12,831 INFO L78 Accepts]: Start accepts. Automaton has 141636 states and 384376 transitions. Word has length 453 [2021-06-05 18:19:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:12,831 INFO L482 AbstractCegarLoop]: Abstraction has 141636 states and 384376 transitions. [2021-06-05 18:19:12,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:12,831 INFO L276 IsEmpty]: Start isEmpty. Operand 141636 states and 384376 transitions. [2021-06-05 18:19:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:19:12,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:12,999 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:13,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:13,213 INFO L430 AbstractCegarLoop]: === Iteration 140 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:13,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:13,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2128595761, now seen corresponding path program 83 times [2021-06-05 18:19:13,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:13,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294091974] [2021-06-05 18:19:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:13,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:13,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294091974] [2021-06-05 18:19:13,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294091974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:13,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147287966] [2021-06-05 18:19:13,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:13,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:19:13,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:13,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:13,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:14,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147287966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:14,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:14,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:19:14,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296963911] [2021-06-05 18:19:14,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:14,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:14,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:14,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:14,176 INFO L87 Difference]: Start difference. First operand 141636 states and 384376 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:15,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:15,346 INFO L93 Difference]: Finished difference Result 182396 states and 488995 transitions. [2021-06-05 18:19:15,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:19:15,347 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:19:15,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:15,587 INFO L225 Difference]: With dead ends: 182396 [2021-06-05 18:19:15,587 INFO L226 Difference]: Without dead ends: 182396 [2021-06-05 18:19:15,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 259.6ms TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:19:15,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182396 states. [2021-06-05 18:19:17,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182396 to 136496. [2021-06-05 18:19:17,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136496 states, 136494 states have (on average 2.712566120122496) internal successors, (370249), 136495 states have internal predecessors, (370249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136496 states to 136496 states and 370249 transitions. [2021-06-05 18:19:18,202 INFO L78 Accepts]: Start accepts. Automaton has 136496 states and 370249 transitions. Word has length 453 [2021-06-05 18:19:18,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:18,203 INFO L482 AbstractCegarLoop]: Abstraction has 136496 states and 370249 transitions. [2021-06-05 18:19:18,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:18,203 INFO L276 IsEmpty]: Start isEmpty. Operand 136496 states and 370249 transitions. [2021-06-05 18:19:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:19:18,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:18,371 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:18,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 18:19:18,571 INFO L430 AbstractCegarLoop]: === Iteration 141 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:18,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:18,572 INFO L82 PathProgramCache]: Analyzing trace with hash 959596525, now seen corresponding path program 84 times [2021-06-05 18:19:18,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:18,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973785315] [2021-06-05 18:19:18,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:18,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:18,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973785315] [2021-06-05 18:19:18,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973785315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:18,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178106500] [2021-06-05 18:19:18,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:19,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:19:19,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:19,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:19,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:20,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178106500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:20,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:20,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:19:20,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610657044] [2021-06-05 18:19:20,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:20,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:20,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:20,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:20,340 INFO L87 Difference]: Start difference. First operand 136496 states and 370249 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:21,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:21,188 INFO L93 Difference]: Finished difference Result 218306 states and 588806 transitions. [2021-06-05 18:19:21,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:19:21,195 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:19:21,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:21,513 INFO L225 Difference]: With dead ends: 218306 [2021-06-05 18:19:21,513 INFO L226 Difference]: Without dead ends: 218306 [2021-06-05 18:19:21,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:19:22,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218306 states. [2021-06-05 18:19:24,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218306 to 141636. [2021-06-05 18:19:24,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141636 states, 141634 states have (on average 2.714122315263284) internal successors, (384412), 141635 states have internal predecessors, (384412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141636 states to 141636 states and 384412 transitions. [2021-06-05 18:19:24,966 INFO L78 Accepts]: Start accepts. Automaton has 141636 states and 384412 transitions. Word has length 453 [2021-06-05 18:19:24,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:24,967 INFO L482 AbstractCegarLoop]: Abstraction has 141636 states and 384412 transitions. [2021-06-05 18:19:24,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 141636 states and 384412 transitions. [2021-06-05 18:19:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:19:25,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:25,146 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:25,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:25,347 INFO L430 AbstractCegarLoop]: === Iteration 142 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:25,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:25,347 INFO L82 PathProgramCache]: Analyzing trace with hash 848069259, now seen corresponding path program 85 times [2021-06-05 18:19:25,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:25,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106364868] [2021-06-05 18:19:25,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:25,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:25,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106364868] [2021-06-05 18:19:25,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106364868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:25,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485188999] [2021-06-05 18:19:25,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:25,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:25,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:26,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485188999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:26,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:26,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:19:26,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637022128] [2021-06-05 18:19:26,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:26,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:26,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:26,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:26,190 INFO L87 Difference]: Start difference. First operand 141636 states and 384412 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:27,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:27,483 INFO L93 Difference]: Finished difference Result 208476 states and 561638 transitions. [2021-06-05 18:19:27,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:19:27,483 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:19:27,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:27,800 INFO L225 Difference]: With dead ends: 208476 [2021-06-05 18:19:27,800 INFO L226 Difference]: Without dead ends: 208476 [2021-06-05 18:19:27,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 278.2ms TimeCoverageRelationStatistics Valid=399, Invalid=1241, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:19:28,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208476 states. [2021-06-05 18:19:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208476 to 139596. [2021-06-05 18:19:30,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139596 states, 139594 states have (on average 2.713168187744459) internal successors, (378742), 139595 states have internal predecessors, (378742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139596 states to 139596 states and 378742 transitions. [2021-06-05 18:19:30,527 INFO L78 Accepts]: Start accepts. Automaton has 139596 states and 378742 transitions. Word has length 453 [2021-06-05 18:19:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:30,527 INFO L482 AbstractCegarLoop]: Abstraction has 139596 states and 378742 transitions. [2021-06-05 18:19:30,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 139596 states and 378742 transitions. [2021-06-05 18:19:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:19:30,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:30,699 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:30,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:30,899 INFO L430 AbstractCegarLoop]: === Iteration 143 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:30,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:30,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1469078129, now seen corresponding path program 86 times [2021-06-05 18:19:30,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:30,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870699865] [2021-06-05 18:19:30,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:31,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:31,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870699865] [2021-06-05 18:19:31,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870699865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:31,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118931583] [2021-06-05 18:19:31,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:31,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:31,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:31,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:31,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:32,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118931583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:32,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:32,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:19:32,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602294261] [2021-06-05 18:19:32,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:32,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:32,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:32,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:32,281 INFO L87 Difference]: Start difference. First operand 139596 states and 378742 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:33,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:33,133 INFO L93 Difference]: Finished difference Result 215846 states and 582146 transitions. [2021-06-05 18:19:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:19:33,134 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:19:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:33,445 INFO L225 Difference]: With dead ends: 215846 [2021-06-05 18:19:33,445 INFO L226 Difference]: Without dead ends: 215846 [2021-06-05 18:19:33,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=387, Invalid=1173, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:19:34,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215846 states. [2021-06-05 18:19:35,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215846 to 147156. [2021-06-05 18:19:36,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147156 states, 147154 states have (on average 2.714652676787583) internal successors, (399472), 147155 states have internal predecessors, (399472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147156 states to 147156 states and 399472 transitions. [2021-06-05 18:19:36,946 INFO L78 Accepts]: Start accepts. Automaton has 147156 states and 399472 transitions. Word has length 453 [2021-06-05 18:19:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:36,946 INFO L482 AbstractCegarLoop]: Abstraction has 147156 states and 399472 transitions. [2021-06-05 18:19:36,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 147156 states and 399472 transitions. [2021-06-05 18:19:37,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:19:37,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:37,141 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:37,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:37,341 INFO L430 AbstractCegarLoop]: === Iteration 144 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:37,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:37,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1580605395, now seen corresponding path program 87 times [2021-06-05 18:19:37,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:37,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84270439] [2021-06-05 18:19:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:37,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:37,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84270439] [2021-06-05 18:19:37,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84270439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:37,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761453748] [2021-06-05 18:19:37,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:37,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:19:37,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:37,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:37,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:38,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761453748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:38,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:38,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:19:38,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734015153] [2021-06-05 18:19:38,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:38,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:38,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:38,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:38,436 INFO L87 Difference]: Start difference. First operand 147156 states and 399472 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:39,896 INFO L93 Difference]: Finished difference Result 268381 states and 726313 transitions. [2021-06-05 18:19:39,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:19:39,896 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:19:39,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:40,292 INFO L225 Difference]: With dead ends: 268381 [2021-06-05 18:19:40,292 INFO L226 Difference]: Without dead ends: 268381 [2021-06-05 18:19:40,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 278.6ms TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:19:40,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268381 states. [2021-06-05 18:19:43,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268381 to 149096. [2021-06-05 18:19:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149096 states, 149094 states have (on average 2.7151394422310755) internal successors, (404811), 149095 states have internal predecessors, (404811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:44,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149096 states to 149096 states and 404811 transitions. [2021-06-05 18:19:44,086 INFO L78 Accepts]: Start accepts. Automaton has 149096 states and 404811 transitions. Word has length 453 [2021-06-05 18:19:44,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:44,086 INFO L482 AbstractCegarLoop]: Abstraction has 149096 states and 404811 transitions. [2021-06-05 18:19:44,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:44,086 INFO L276 IsEmpty]: Start isEmpty. Operand 149096 states and 404811 transitions. [2021-06-05 18:19:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:19:44,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:44,286 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:44,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:44,486 INFO L430 AbstractCegarLoop]: === Iteration 145 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:44,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:44,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1625864625, now seen corresponding path program 88 times [2021-06-05 18:19:44,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:44,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800433235] [2021-06-05 18:19:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:44,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:44,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800433235] [2021-06-05 18:19:44,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800433235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:44,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282049070] [2021-06-05 18:19:44,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:45,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:45,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:45,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:45,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:45,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282049070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:45,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:45,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:19:45,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29105664] [2021-06-05 18:19:45,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:45,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:45,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:45,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:45,681 INFO L87 Difference]: Start difference. First operand 149096 states and 404811 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:46,989 INFO L93 Difference]: Finished difference Result 207846 states and 560419 transitions. [2021-06-05 18:19:46,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:19:46,990 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:19:46,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:47,297 INFO L225 Difference]: With dead ends: 207846 [2021-06-05 18:19:47,297 INFO L226 Difference]: Without dead ends: 207846 [2021-06-05 18:19:47,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:19:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207846 states. [2021-06-05 18:19:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207846 to 147156. [2021-06-05 18:19:49,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147156 states, 147154 states have (on average 2.714652676787583) internal successors, (399472), 147155 states have internal predecessors, (399472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147156 states to 147156 states and 399472 transitions. [2021-06-05 18:19:50,118 INFO L78 Accepts]: Start accepts. Automaton has 147156 states and 399472 transitions. Word has length 453 [2021-06-05 18:19:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:50,119 INFO L482 AbstractCegarLoop]: Abstraction has 147156 states and 399472 transitions. [2021-06-05 18:19:50,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 147156 states and 399472 transitions. [2021-06-05 18:19:50,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:19:50,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:50,303 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:50,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 18:19:50,504 INFO L430 AbstractCegarLoop]: === Iteration 146 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:50,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:50,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2003309613, now seen corresponding path program 89 times [2021-06-05 18:19:50,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:50,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840233404] [2021-06-05 18:19:50,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:51,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:51,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840233404] [2021-06-05 18:19:51,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840233404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:51,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571820585] [2021-06-05 18:19:51,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:51,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:19:51,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:51,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:51,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:52,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571820585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:52,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:52,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:19:52,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625248924] [2021-06-05 18:19:52,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:52,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:52,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:52,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:52,184 INFO L87 Difference]: Start difference. First operand 147156 states and 399472 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:52,928 INFO L93 Difference]: Finished difference Result 177711 states and 477459 transitions. [2021-06-05 18:19:52,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:19:52,929 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:19:52,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:53,158 INFO L225 Difference]: With dead ends: 177711 [2021-06-05 18:19:53,159 INFO L226 Difference]: Without dead ends: 177711 [2021-06-05 18:19:53,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 312.3ms TimeCoverageRelationStatistics Valid=402, Invalid=1238, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:19:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177711 states. [2021-06-05 18:19:55,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177711 to 141536. [2021-06-05 18:19:55,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141536 states, 141534 states have (on average 2.7137013014540674) internal successors, (384081), 141535 states have internal predecessors, (384081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:56,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141536 states to 141536 states and 384081 transitions. [2021-06-05 18:19:56,467 INFO L78 Accepts]: Start accepts. Automaton has 141536 states and 384081 transitions. Word has length 453 [2021-06-05 18:19:56,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:56,467 INFO L482 AbstractCegarLoop]: Abstraction has 141536 states and 384081 transitions. [2021-06-05 18:19:56,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand 141536 states and 384081 transitions. [2021-06-05 18:19:56,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:19:56,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:56,665 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:56,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 18:19:56,866 INFO L430 AbstractCegarLoop]: === Iteration 147 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:56,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:56,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1891782347, now seen corresponding path program 90 times [2021-06-05 18:19:56,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:56,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570512266] [2021-06-05 18:19:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:57,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:57,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570512266] [2021-06-05 18:19:57,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570512266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:57,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592566917] [2021-06-05 18:19:57,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:57,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:19:57,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:57,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:57,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:19:58,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592566917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:58,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:58,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:19:58,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606176300] [2021-06-05 18:19:58,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:58,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:58,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:58,072 INFO L87 Difference]: Start difference. First operand 141536 states and 384081 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:59,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:59,392 INFO L93 Difference]: Finished difference Result 223476 states and 603618 transitions. [2021-06-05 18:19:59,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:19:59,392 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:19:59,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:59,737 INFO L225 Difference]: With dead ends: 223476 [2021-06-05 18:19:59,737 INFO L226 Difference]: Without dead ends: 223476 [2021-06-05 18:19:59,738 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=400, Invalid=1240, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:20:00,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223476 states. [2021-06-05 18:20:02,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223476 to 144636. [2021-06-05 18:20:02,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144636 states, 144634 states have (on average 2.7142580582712226) internal successors, (392574), 144635 states have internal predecessors, (392574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144636 states to 144636 states and 392574 transitions. [2021-06-05 18:20:03,003 INFO L78 Accepts]: Start accepts. Automaton has 144636 states and 392574 transitions. Word has length 453 [2021-06-05 18:20:03,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:03,003 INFO L482 AbstractCegarLoop]: Abstraction has 144636 states and 392574 transitions. [2021-06-05 18:20:03,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:03,004 INFO L276 IsEmpty]: Start isEmpty. Operand 144636 states and 392574 transitions. [2021-06-05 18:20:03,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:20:03,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:03,231 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:03,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 18:20:03,457 INFO L430 AbstractCegarLoop]: === Iteration 148 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:03,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:03,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1846523117, now seen corresponding path program 91 times [2021-06-05 18:20:03,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:03,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995722050] [2021-06-05 18:20:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:20:04,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:04,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995722050] [2021-06-05 18:20:04,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995722050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:04,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319864955] [2021-06-05 18:20:04,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:04,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:04,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:20:05,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319864955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:05,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:05,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:20:05,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529123066] [2021-06-05 18:20:05,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:05,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:05,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:05,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:05,048 INFO L87 Difference]: Start difference. First operand 144636 states and 392574 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:05,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:05,976 INFO L93 Difference]: Finished difference Result 223646 states and 604118 transitions. [2021-06-05 18:20:05,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:20:05,977 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:20:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:06,861 INFO L225 Difference]: With dead ends: 223646 [2021-06-05 18:20:06,861 INFO L226 Difference]: Without dead ends: 223646 [2021-06-05 18:20:06,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 341.9ms TimeCoverageRelationStatistics Valid=398, Invalid=1242, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:20:07,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223646 states. [2021-06-05 18:20:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223646 to 145896. [2021-06-05 18:20:09,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145896 states, 145894 states have (on average 2.7144570715725114) internal successors, (396023), 145895 states have internal predecessors, (396023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145896 states to 145896 states and 396023 transitions. [2021-06-05 18:20:09,885 INFO L78 Accepts]: Start accepts. Automaton has 145896 states and 396023 transitions. Word has length 453 [2021-06-05 18:20:09,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:09,886 INFO L482 AbstractCegarLoop]: Abstraction has 145896 states and 396023 transitions. [2021-06-05 18:20:09,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:09,886 INFO L276 IsEmpty]: Start isEmpty. Operand 145896 states and 396023 transitions. [2021-06-05 18:20:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:20:10,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:10,070 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:10,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 18:20:10,271 INFO L430 AbstractCegarLoop]: === Iteration 149 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:10,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:10,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1124018955, now seen corresponding path program 92 times [2021-06-05 18:20:10,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:10,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050951300] [2021-06-05 18:20:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:20:10,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:10,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050951300] [2021-06-05 18:20:10,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050951300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:10,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705284185] [2021-06-05 18:20:10,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:10,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:10,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:10,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:10,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:11,428 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:20:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:20:11,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705284185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:11,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:11,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:20:11,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19601953] [2021-06-05 18:20:11,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:11,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:11,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:11,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:11,697 INFO L87 Difference]: Start difference. First operand 145896 states and 396023 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:12,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:12,572 INFO L93 Difference]: Finished difference Result 196316 states and 527524 transitions. [2021-06-05 18:20:12,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:20:12,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-06-05 18:20:12,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:12,827 INFO L225 Difference]: With dead ends: 196316 [2021-06-05 18:20:12,827 INFO L226 Difference]: Without dead ends: 196316 [2021-06-05 18:20:12,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 306.4ms TimeCoverageRelationStatistics Valid=413, Invalid=1309, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:20:13,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196316 states. [2021-06-05 18:20:15,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196316 to 157136. [2021-06-05 18:20:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157136 states, 157134 states have (on average 2.7164140160627235) internal successors, (426841), 157135 states have internal predecessors, (426841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157136 states to 157136 states and 426841 transitions. [2021-06-05 18:20:16,559 INFO L78 Accepts]: Start accepts. Automaton has 157136 states and 426841 transitions. Word has length 453 [2021-06-05 18:20:16,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:16,560 INFO L482 AbstractCegarLoop]: Abstraction has 157136 states and 426841 transitions. [2021-06-05 18:20:16,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 157136 states and 426841 transitions. [2021-06-05 18:20:16,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:20:16,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:16,766 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:16,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 18:20:16,969 INFO L430 AbstractCegarLoop]: === Iteration 150 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:16,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:16,969 INFO L82 PathProgramCache]: Analyzing trace with hash -618533180, now seen corresponding path program 93 times [2021-06-05 18:20:16,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:16,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937703243] [2021-06-05 18:20:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1661 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:20:17,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:17,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937703243] [2021-06-05 18:20:17,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937703243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:17,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146742431] [2021-06-05 18:20:17,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:17,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:20:17,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:17,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:17,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1637 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:20:18,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146742431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:18,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:18,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2021-06-05 18:20:18,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189411040] [2021-06-05 18:20:18,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:20:18,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:18,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:20:18,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:20:18,286 INFO L87 Difference]: Start difference. First operand 157136 states and 426841 transitions. Second operand has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:19,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:19,591 INFO L93 Difference]: Finished difference Result 187441 states and 503656 transitions. [2021-06-05 18:20:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:20:19,591 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:20:19,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:19,828 INFO L225 Difference]: With dead ends: 187441 [2021-06-05 18:20:19,828 INFO L226 Difference]: Without dead ends: 187441 [2021-06-05 18:20:19,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 824.2ms TimeCoverageRelationStatistics Valid=553, Invalid=1427, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:20:20,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187441 states. [2021-06-05 18:20:22,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187441 to 157136. [2021-06-05 18:20:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157136 states, 157134 states have (on average 2.7164140160627235) internal successors, (426841), 157135 states have internal predecessors, (426841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:22,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157136 states to 157136 states and 426841 transitions. [2021-06-05 18:20:22,657 INFO L78 Accepts]: Start accepts. Automaton has 157136 states and 426841 transitions. Word has length 458 [2021-06-05 18:20:22,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:22,657 INFO L482 AbstractCegarLoop]: Abstraction has 157136 states and 426841 transitions. [2021-06-05 18:20:22,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:22,657 INFO L276 IsEmpty]: Start isEmpty. Operand 157136 states and 426841 transitions. [2021-06-05 18:20:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:20:22,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:22,859 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:23,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:23,061 INFO L430 AbstractCegarLoop]: === Iteration 151 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash -276421662, now seen corresponding path program 94 times [2021-06-05 18:20:23,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:23,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491202128] [2021-06-05 18:20:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1661 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:20:23,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:23,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491202128] [2021-06-05 18:20:23,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491202128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:23,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403821312] [2021-06-05 18:20:23,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:24,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:24,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:24,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:24,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1637 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:20:25,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403821312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:25,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:25,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2021-06-05 18:20:25,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872105425] [2021-06-05 18:20:25,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:20:25,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:25,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:20:25,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:20:25,286 INFO L87 Difference]: Start difference. First operand 157136 states and 426841 transitions. Second operand has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:26,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:26,225 INFO L93 Difference]: Finished difference Result 206876 states and 556500 transitions. [2021-06-05 18:20:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:20:26,225 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:20:26,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:27,060 INFO L225 Difference]: With dead ends: 206876 [2021-06-05 18:20:27,061 INFO L226 Difference]: Without dead ends: 206876 [2021-06-05 18:20:27,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 393.9ms TimeCoverageRelationStatistics Valid=551, Invalid=1429, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:20:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206876 states. [2021-06-05 18:20:29,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206876 to 157136. [2021-06-05 18:20:29,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157136 states, 157134 states have (on average 2.7164140160627235) internal successors, (426841), 157135 states have internal predecessors, (426841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157136 states to 157136 states and 426841 transitions. [2021-06-05 18:20:30,153 INFO L78 Accepts]: Start accepts. Automaton has 157136 states and 426841 transitions. Word has length 458 [2021-06-05 18:20:30,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:30,154 INFO L482 AbstractCegarLoop]: Abstraction has 157136 states and 426841 transitions. [2021-06-05 18:20:30,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:30,154 INFO L276 IsEmpty]: Start isEmpty. Operand 157136 states and 426841 transitions. [2021-06-05 18:20:30,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:20:30,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:30,352 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:30,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:30,552 INFO L430 AbstractCegarLoop]: === Iteration 152 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:30,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:30,553 INFO L82 PathProgramCache]: Analyzing trace with hash -94699392, now seen corresponding path program 95 times [2021-06-05 18:20:30,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:30,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959188360] [2021-06-05 18:20:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1661 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:20:30,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:30,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959188360] [2021-06-05 18:20:30,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959188360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:30,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140753947] [2021-06-05 18:20:30,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:31,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:20:31,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:31,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:31,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1637 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:20:32,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140753947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:32,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:32,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2021-06-05 18:20:32,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729803165] [2021-06-05 18:20:32,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:20:32,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:32,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:20:32,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:20:32,187 INFO L87 Difference]: Start difference. First operand 157136 states and 426841 transitions. Second operand has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:33,111 INFO L93 Difference]: Finished difference Result 211106 states and 569993 transitions. [2021-06-05 18:20:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:20:33,112 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:20:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:33,415 INFO L225 Difference]: With dead ends: 211106 [2021-06-05 18:20:33,415 INFO L226 Difference]: Without dead ends: 211106 [2021-06-05 18:20:33,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 349.5ms TimeCoverageRelationStatistics Valid=563, Invalid=1507, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:20:34,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211106 states. [2021-06-05 18:20:36,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211106 to 162376. [2021-06-05 18:20:36,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162376 states, 162374 states have (on average 2.7177934891053988) internal successors, (441299), 162375 states have internal predecessors, (441299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162376 states to 162376 states and 441299 transitions. [2021-06-05 18:20:37,226 INFO L78 Accepts]: Start accepts. Automaton has 162376 states and 441299 transitions. Word has length 458 [2021-06-05 18:20:37,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:37,226 INFO L482 AbstractCegarLoop]: Abstraction has 162376 states and 441299 transitions. [2021-06-05 18:20:37,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 162376 states and 441299 transitions. [2021-06-05 18:20:37,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:20:37,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:37,449 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:37,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:37,649 INFO L430 AbstractCegarLoop]: === Iteration 153 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:37,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:37,650 INFO L82 PathProgramCache]: Analyzing trace with hash 513959070, now seen corresponding path program 96 times [2021-06-05 18:20:37,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:37,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533963261] [2021-06-05 18:20:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1661 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:20:37,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:37,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533963261] [2021-06-05 18:20:37,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533963261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:37,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715993524] [2021-06-05 18:20:37,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:38,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:20:38,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:38,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:38,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1637 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:20:39,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715993524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:39,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:39,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2021-06-05 18:20:39,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264638573] [2021-06-05 18:20:39,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:20:39,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:39,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:20:39,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:20:39,095 INFO L87 Difference]: Start difference. First operand 162376 states and 441299 transitions. Second operand has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:40,503 INFO L93 Difference]: Finished difference Result 216291 states and 583626 transitions. [2021-06-05 18:20:40,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:20:40,504 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:20:40,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:40,813 INFO L225 Difference]: With dead ends: 216291 [2021-06-05 18:20:40,813 INFO L226 Difference]: Without dead ends: 216291 [2021-06-05 18:20:40,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 354.7ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:20:41,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216291 states. [2021-06-05 18:20:43,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216291 to 166256. [2021-06-05 18:20:43,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166256 states, 166254 states have (on average 2.7185932368544514) internal successors, (451977), 166255 states have internal predecessors, (451977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166256 states to 166256 states and 451977 transitions. [2021-06-05 18:20:44,519 INFO L78 Accepts]: Start accepts. Automaton has 166256 states and 451977 transitions. Word has length 458 [2021-06-05 18:20:44,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:44,520 INFO L482 AbstractCegarLoop]: Abstraction has 166256 states and 451977 transitions. [2021-06-05 18:20:44,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:44,520 INFO L276 IsEmpty]: Start isEmpty. Operand 166256 states and 451977 transitions. [2021-06-05 18:20:44,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:20:44,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:44,843 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:45,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:45,044 INFO L430 AbstractCegarLoop]: === Iteration 154 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:45,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1976971324, now seen corresponding path program 97 times [2021-06-05 18:20:45,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:45,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130360649] [2021-06-05 18:20:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1661 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:20:45,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:45,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130360649] [2021-06-05 18:20:45,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130360649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:45,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546671477] [2021-06-05 18:20:45,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:45,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:45,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1637 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:20:45,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546671477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:45,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:45,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2021-06-05 18:20:45,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993394840] [2021-06-05 18:20:45,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:20:45,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:45,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:20:45,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:20:45,898 INFO L87 Difference]: Start difference. First operand 166256 states and 451977 transitions. Second operand has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:47,343 INFO L93 Difference]: Finished difference Result 217656 states and 587099 transitions. [2021-06-05 18:20:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:20:47,343 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:20:47,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:47,686 INFO L225 Difference]: With dead ends: 217656 [2021-06-05 18:20:47,686 INFO L226 Difference]: Without dead ends: 217656 [2021-06-05 18:20:47,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=587, Invalid=1669, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:20:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217656 states. [2021-06-05 18:20:50,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217656 to 166936. [2021-06-05 18:20:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166936 states, 166934 states have (on average 2.7188409790695722) internal successors, (453867), 166935 states have internal predecessors, (453867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166936 states to 166936 states and 453867 transitions. [2021-06-05 18:20:50,665 INFO L78 Accepts]: Start accepts. Automaton has 166936 states and 453867 transitions. Word has length 458 [2021-06-05 18:20:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:50,666 INFO L482 AbstractCegarLoop]: Abstraction has 166936 states and 453867 transitions. [2021-06-05 18:20:50,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:50,666 INFO L276 IsEmpty]: Start isEmpty. Operand 166936 states and 453867 transitions. [2021-06-05 18:20:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:20:50,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:50,878 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:51,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:51,079 INFO L430 AbstractCegarLoop]: === Iteration 155 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:51,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:51,079 INFO L82 PathProgramCache]: Analyzing trace with hash 770196314, now seen corresponding path program 98 times [2021-06-05 18:20:51,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:51,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285440220] [2021-06-05 18:20:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1661 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:20:52,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:52,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285440220] [2021-06-05 18:20:52,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285440220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:52,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027686931] [2021-06-05 18:20:52,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:52,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:52,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:52,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:52,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1637 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:20:52,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027686931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:52,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:52,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2021-06-05 18:20:52,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442872039] [2021-06-05 18:20:52,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:20:52,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:52,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:20:52,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:20:52,694 INFO L87 Difference]: Start difference. First operand 166936 states and 453867 transitions. Second operand has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:54,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:54,099 INFO L93 Difference]: Finished difference Result 208221 states and 561265 transitions. [2021-06-05 18:20:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:20:54,100 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:20:54,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:54,386 INFO L225 Difference]: With dead ends: 208221 [2021-06-05 18:20:54,386 INFO L226 Difference]: Without dead ends: 208221 [2021-06-05 18:20:54,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 420.0ms TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:20:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208221 states. [2021-06-05 18:20:56,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208221 to 167616. [2021-06-05 18:20:57,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167616 states, 167614 states have (on average 2.7190867111339148) internal successors, (455757), 167615 states have internal predecessors, (455757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167616 states to 167616 states and 455757 transitions. [2021-06-05 18:20:57,349 INFO L78 Accepts]: Start accepts. Automaton has 167616 states and 455757 transitions. Word has length 458 [2021-06-05 18:20:57,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:57,349 INFO L482 AbstractCegarLoop]: Abstraction has 167616 states and 455757 transitions. [2021-06-05 18:20:57,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:57,349 INFO L276 IsEmpty]: Start isEmpty. Operand 167616 states and 455757 transitions. [2021-06-05 18:20:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:20:57,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:57,562 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:57,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:57,763 INFO L430 AbstractCegarLoop]: === Iteration 156 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:57,763 INFO L82 PathProgramCache]: Analyzing trace with hash 658669048, now seen corresponding path program 99 times [2021-06-05 18:20:57,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:57,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097302259] [2021-06-05 18:20:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1661 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:20:57,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:57,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097302259] [2021-06-05 18:20:57,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097302259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:57,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117252365] [2021-06-05 18:20:57,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:58,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:20:58,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:58,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:58,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:59,484 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-05 18:20:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1637 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:20:59,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117252365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:59,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:59,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2021-06-05 18:20:59,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439227976] [2021-06-05 18:20:59,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:20:59,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:59,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:20:59,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:20:59,967 INFO L87 Difference]: Start difference. First operand 167616 states and 455757 transitions. Second operand has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:01,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:01,325 INFO L93 Difference]: Finished difference Result 201856 states and 544142 transitions. [2021-06-05 18:21:01,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:21:01,325 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:21:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:01,674 INFO L225 Difference]: With dead ends: 201856 [2021-06-05 18:21:01,674 INFO L226 Difference]: Without dead ends: 201856 [2021-06-05 18:21:01,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=611, Invalid=1839, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:21:02,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201856 states. [2021-06-05 18:21:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201856 to 166936. [2021-06-05 18:21:04,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166936 states, 166934 states have (on average 2.7188409790695722) internal successors, (453867), 166935 states have internal predecessors, (453867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166936 states to 166936 states and 453867 transitions. [2021-06-05 18:21:04,736 INFO L78 Accepts]: Start accepts. Automaton has 166936 states and 453867 transitions. Word has length 458 [2021-06-05 18:21:04,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:04,737 INFO L482 AbstractCegarLoop]: Abstraction has 166936 states and 453867 transitions. [2021-06-05 18:21:04,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:04,737 INFO L276 IsEmpty]: Start isEmpty. Operand 166936 states and 453867 transitions. [2021-06-05 18:21:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:21:04,955 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:04,956 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:05,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:05,156 INFO L430 AbstractCegarLoop]: === Iteration 157 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:05,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:05,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1535680388, now seen corresponding path program 100 times [2021-06-05 18:21:05,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:05,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957108550] [2021-06-05 18:21:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:06,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:06,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957108550] [2021-06-05 18:21:06,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957108550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:06,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003554991] [2021-06-05 18:21:06,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:06,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:06,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:06,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:06,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:07,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003554991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:07,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:07,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:21:07,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235711900] [2021-06-05 18:21:07,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:07,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:07,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:07,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:07,165 INFO L87 Difference]: Start difference. First operand 166936 states and 453867 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:08,082 INFO L93 Difference]: Finished difference Result 203496 states and 547129 transitions. [2021-06-05 18:21:08,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:21:08,082 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:21:08,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:08,879 INFO L225 Difference]: With dead ends: 203496 [2021-06-05 18:21:08,879 INFO L226 Difference]: Without dead ends: 203496 [2021-06-05 18:21:08,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 395.0ms TimeCoverageRelationStatistics Valid=549, Invalid=1431, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:21:09,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203496 states. [2021-06-05 18:21:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203496 to 163636. [2021-06-05 18:21:11,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163636 states, 163634 states have (on average 2.7179437036312746) internal successors, (444748), 163635 states have internal predecessors, (444748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163636 states to 163636 states and 444748 transitions. [2021-06-05 18:21:11,906 INFO L78 Accepts]: Start accepts. Automaton has 163636 states and 444748 transitions. Word has length 458 [2021-06-05 18:21:11,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:11,906 INFO L482 AbstractCegarLoop]: Abstraction has 163636 states and 444748 transitions. [2021-06-05 18:21:11,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:11,906 INFO L276 IsEmpty]: Start isEmpty. Operand 163636 states and 444748 transitions. [2021-06-05 18:21:12,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:21:12,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:12,108 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:12,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 18:21:12,309 INFO L430 AbstractCegarLoop]: === Iteration 158 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:12,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:12,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1717402658, now seen corresponding path program 101 times [2021-06-05 18:21:12,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:12,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430049176] [2021-06-05 18:21:12,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:12,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:12,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430049176] [2021-06-05 18:21:12,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430049176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:12,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321000314] [2021-06-05 18:21:12,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:13,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:21:13,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:13,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:13,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:14,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321000314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:14,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:14,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:21:14,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418212789] [2021-06-05 18:21:14,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:14,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:14,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:14,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:14,167 INFO L87 Difference]: Start difference. First operand 163636 states and 444748 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:15,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:15,129 INFO L93 Difference]: Finished difference Result 232156 states and 626613 transitions. [2021-06-05 18:21:15,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:21:15,130 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:21:15,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:15,472 INFO L225 Difference]: With dead ends: 232156 [2021-06-05 18:21:15,473 INFO L226 Difference]: Without dead ends: 232156 [2021-06-05 18:21:15,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=547, Invalid=1433, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:21:16,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232156 states. [2021-06-05 18:21:18,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232156 to 162956. [2021-06-05 18:21:18,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162956 states, 162954 states have (on average 2.717687200068731) internal successors, (442858), 162955 states have internal predecessors, (442858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162956 states to 162956 states and 442858 transitions. [2021-06-05 18:21:19,240 INFO L78 Accepts]: Start accepts. Automaton has 162956 states and 442858 transitions. Word has length 458 [2021-06-05 18:21:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:19,241 INFO L482 AbstractCegarLoop]: Abstraction has 162956 states and 442858 transitions. [2021-06-05 18:21:19,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 162956 states and 442858 transitions. [2021-06-05 18:21:19,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:21:19,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:19,444 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:19,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:19,644 INFO L430 AbstractCegarLoop]: === Iteration 159 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:19,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:19,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1968906176, now seen corresponding path program 102 times [2021-06-05 18:21:19,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:19,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662511083] [2021-06-05 18:21:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:19,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:19,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662511083] [2021-06-05 18:21:19,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662511083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:19,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758718617] [2021-06-05 18:21:19,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:20,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:21:20,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:20,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:20,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:21,260 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:21:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:21,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758718617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:21,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:21,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:21:21,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259107543] [2021-06-05 18:21:21,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:21,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:21,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:21,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:21,553 INFO L87 Difference]: Start difference. First operand 162956 states and 442858 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:22,575 INFO L93 Difference]: Finished difference Result 244101 states and 658864 transitions. [2021-06-05 18:21:22,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:21:22,575 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:21:22,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:22,931 INFO L225 Difference]: With dead ends: 244101 [2021-06-05 18:21:22,931 INFO L226 Difference]: Without dead ends: 244101 [2021-06-05 18:21:22,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=558, Invalid=1512, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:21:23,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244101 states. [2021-06-05 18:21:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244101 to 164896. [2021-06-05 18:21:26,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164896 states, 164894 states have (on average 2.718091622496877) internal successors, (448197), 164895 states have internal predecessors, (448197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164896 states to 164896 states and 448197 transitions. [2021-06-05 18:21:26,660 INFO L78 Accepts]: Start accepts. Automaton has 164896 states and 448197 transitions. Word has length 458 [2021-06-05 18:21:26,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:26,661 INFO L482 AbstractCegarLoop]: Abstraction has 164896 states and 448197 transitions. [2021-06-05 18:21:26,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 164896 states and 448197 transitions. [2021-06-05 18:21:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:21:26,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:26,865 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:27,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 18:21:27,066 INFO L430 AbstractCegarLoop]: === Iteration 160 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:27,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:27,066 INFO L82 PathProgramCache]: Analyzing trace with hash -505893922, now seen corresponding path program 103 times [2021-06-05 18:21:27,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:27,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384697881] [2021-06-05 18:21:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:27,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:27,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384697881] [2021-06-05 18:21:27,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384697881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:27,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583149645] [2021-06-05 18:21:27,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:27,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:27,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:28,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583149645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:28,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:28,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:21:28,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385758487] [2021-06-05 18:21:28,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:28,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:28,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:28,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:28,539 INFO L87 Difference]: Start difference. First operand 164896 states and 448197 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:29,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:29,519 INFO L93 Difference]: Finished difference Result 240566 states and 649604 transitions. [2021-06-05 18:21:29,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:21:29,520 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:21:29,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:29,872 INFO L225 Difference]: With dead ends: 240566 [2021-06-05 18:21:29,872 INFO L226 Difference]: Without dead ends: 240566 [2021-06-05 18:21:29,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 371.9ms TimeCoverageRelationStatistics Valid=569, Invalid=1593, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:21:30,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240566 states. [2021-06-05 18:21:33,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240566 to 165576. [2021-06-05 18:21:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165576 states, 165574 states have (on average 2.718343459721937) internal successors, (450087), 165575 states have internal predecessors, (450087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165576 states to 165576 states and 450087 transitions. [2021-06-05 18:21:33,562 INFO L78 Accepts]: Start accepts. Automaton has 165576 states and 450087 transitions. Word has length 458 [2021-06-05 18:21:33,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:33,563 INFO L482 AbstractCegarLoop]: Abstraction has 165576 states and 450087 transitions. [2021-06-05 18:21:33,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 165576 states and 450087 transitions. [2021-06-05 18:21:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:21:33,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:33,773 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:33,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:33,973 INFO L430 AbstractCegarLoop]: === Iteration 161 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:33,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:33,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1712668932, now seen corresponding path program 104 times [2021-06-05 18:21:33,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:33,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979308664] [2021-06-05 18:21:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:34,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:34,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979308664] [2021-06-05 18:21:34,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979308664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:34,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863104442] [2021-06-05 18:21:34,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:34,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:34,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:34,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:34,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:35,288 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:21:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:35,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863104442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:35,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:35,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:21:35,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296388156] [2021-06-05 18:21:35,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:35,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:35,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:35,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:35,401 INFO L87 Difference]: Start difference. First operand 165576 states and 450087 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:36,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:36,374 INFO L93 Difference]: Finished difference Result 230361 states and 621320 transitions. [2021-06-05 18:21:36,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:21:36,374 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:21:36,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:36,717 INFO L225 Difference]: With dead ends: 230361 [2021-06-05 18:21:36,717 INFO L226 Difference]: Without dead ends: 230361 [2021-06-05 18:21:36,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 359.9ms TimeCoverageRelationStatistics Valid=580, Invalid=1676, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:21:37,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230361 states. [2021-06-05 18:21:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230361 to 166256. [2021-06-05 18:21:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166256 states, 166254 states have (on average 2.7185932368544514) internal successors, (451977), 166255 states have internal predecessors, (451977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:40,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166256 states to 166256 states and 451977 transitions. [2021-06-05 18:21:40,409 INFO L78 Accepts]: Start accepts. Automaton has 166256 states and 451977 transitions. Word has length 458 [2021-06-05 18:21:40,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:40,410 INFO L482 AbstractCegarLoop]: Abstraction has 166256 states and 451977 transitions. [2021-06-05 18:21:40,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 166256 states and 451977 transitions. [2021-06-05 18:21:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:21:40,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:40,624 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:40,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 18:21:40,825 INFO L430 AbstractCegarLoop]: === Iteration 162 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:40,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1824196198, now seen corresponding path program 105 times [2021-06-05 18:21:40,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:40,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078911693] [2021-06-05 18:21:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:41,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:41,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078911693] [2021-06-05 18:21:41,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078911693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:41,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849631736] [2021-06-05 18:21:41,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:41,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:21:41,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:41,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:41,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:42,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849631736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:42,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:42,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:21:42,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158677738] [2021-06-05 18:21:42,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:42,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:42,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:42,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:42,224 INFO L87 Difference]: Start difference. First operand 166256 states and 451977 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:42,901 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 18:21:43,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:43,687 INFO L93 Difference]: Finished difference Result 218906 states and 589807 transitions. [2021-06-05 18:21:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:21:43,688 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:21:43,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:44,013 INFO L225 Difference]: With dead ends: 218906 [2021-06-05 18:21:44,013 INFO L226 Difference]: Without dead ends: 218906 [2021-06-05 18:21:44,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 877.9ms TimeCoverageRelationStatistics Valid=591, Invalid=1761, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:21:44,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218906 states. [2021-06-05 18:21:46,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218906 to 164216. [2021-06-05 18:21:46,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164216 states, 164214 states have (on average 2.717837699587124) internal successors, (446307), 164215 states have internal predecessors, (446307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164216 states to 164216 states and 446307 transitions. [2021-06-05 18:21:47,751 INFO L78 Accepts]: Start accepts. Automaton has 164216 states and 446307 transitions. Word has length 458 [2021-06-05 18:21:47,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:47,752 INFO L482 AbstractCegarLoop]: Abstraction has 164216 states and 446307 transitions. [2021-06-05 18:21:47,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:47,752 INFO L276 IsEmpty]: Start isEmpty. Operand 164216 states and 446307 transitions. [2021-06-05 18:21:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:21:47,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:47,988 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:48,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:48,201 INFO L430 AbstractCegarLoop]: === Iteration 163 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:48,201 INFO L82 PathProgramCache]: Analyzing trace with hash -183009212, now seen corresponding path program 106 times [2021-06-05 18:21:48,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:48,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255935453] [2021-06-05 18:21:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:48,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:48,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255935453] [2021-06-05 18:21:48,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255935453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:48,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312782259] [2021-06-05 18:21:48,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:48,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:48,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:48,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:48,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:49,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312782259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:49,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:49,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:21:49,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034327430] [2021-06-05 18:21:49,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:49,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:49,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:49,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:49,492 INFO L87 Difference]: Start difference. First operand 164216 states and 446307 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:50,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:50,893 INFO L93 Difference]: Finished difference Result 208156 states and 560802 transitions. [2021-06-05 18:21:50,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:21:50,893 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:21:50,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:51,203 INFO L225 Difference]: With dead ends: 208156 [2021-06-05 18:21:51,203 INFO L226 Difference]: Without dead ends: 208156 [2021-06-05 18:21:51,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 336.6ms TimeCoverageRelationStatistics Valid=561, Invalid=1509, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:21:51,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208156 states. [2021-06-05 18:21:53,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208156 to 159456. [2021-06-05 18:21:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159456 states, 159454 states have (on average 2.716225369071958) internal successors, (433113), 159455 states have internal predecessors, (433113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159456 states to 159456 states and 433113 transitions. [2021-06-05 18:21:54,125 INFO L78 Accepts]: Start accepts. Automaton has 159456 states and 433113 transitions. Word has length 458 [2021-06-05 18:21:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:54,126 INFO L482 AbstractCegarLoop]: Abstraction has 159456 states and 433113 transitions. [2021-06-05 18:21:54,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:54,126 INFO L276 IsEmpty]: Start isEmpty. Operand 159456 states and 433113 transitions. [2021-06-05 18:21:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:21:54,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:54,958 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:21:55,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:55,189 INFO L430 AbstractCegarLoop]: === Iteration 164 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:55,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:55,189 INFO L82 PathProgramCache]: Analyzing trace with hash 425649250, now seen corresponding path program 107 times [2021-06-05 18:21:55,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:55,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247677245] [2021-06-05 18:21:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:55,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:55,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247677245] [2021-06-05 18:21:55,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247677245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:55,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493860713] [2021-06-05 18:21:55,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:55,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:21:55,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:55,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:55,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:21:56,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493860713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:56,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:56,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:21:56,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994382006] [2021-06-05 18:21:56,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:56,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:56,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:56,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:56,299 INFO L87 Difference]: Start difference. First operand 159456 states and 433113 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:58,052 INFO L93 Difference]: Finished difference Result 255381 states and 690353 transitions. [2021-06-05 18:21:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:21:58,053 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:21:58,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:58,646 INFO L225 Difference]: With dead ends: 255381 [2021-06-05 18:21:58,646 INFO L226 Difference]: Without dead ends: 255381 [2021-06-05 18:21:58,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=559, Invalid=1511, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:21:59,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255381 states. [2021-06-05 18:22:01,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255381 to 160716. [2021-06-05 18:22:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160716 states, 160714 states have (on average 2.7163906069166344) internal successors, (436562), 160715 states have internal predecessors, (436562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160716 states to 160716 states and 436562 transitions. [2021-06-05 18:22:01,901 INFO L78 Accepts]: Start accepts. Automaton has 160716 states and 436562 transitions. Word has length 458 [2021-06-05 18:22:01,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:01,901 INFO L482 AbstractCegarLoop]: Abstraction has 160716 states and 436562 transitions. [2021-06-05 18:22:01,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:01,901 INFO L276 IsEmpty]: Start isEmpty. Operand 160716 states and 436562 transitions. [2021-06-05 18:22:02,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:22:02,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:02,102 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:02,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:02,303 INFO L430 AbstractCegarLoop]: === Iteration 165 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:02,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:02,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1888661504, now seen corresponding path program 108 times [2021-06-05 18:22:02,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:02,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933532491] [2021-06-05 18:22:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:03,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:03,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933532491] [2021-06-05 18:22:03,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933532491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:03,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352087546] [2021-06-05 18:22:03,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:03,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:22:03,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:03,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:03,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:04,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352087546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:04,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:04,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:04,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678236721] [2021-06-05 18:22:04,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:04,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:04,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:04,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:04,236 INFO L87 Difference]: Start difference. First operand 160716 states and 436562 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:05,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:05,821 INFO L93 Difference]: Finished difference Result 270966 states and 732971 transitions. [2021-06-05 18:22:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:22:05,821 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:22:05,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:06,239 INFO L225 Difference]: With dead ends: 270966 [2021-06-05 18:22:06,239 INFO L226 Difference]: Without dead ends: 270966 [2021-06-05 18:22:06,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 439.7ms TimeCoverageRelationStatistics Valid=570, Invalid=1592, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:22:06,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270966 states. [2021-06-05 18:22:08,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270966 to 162756. [2021-06-05 18:22:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162756 states, 162754 states have (on average 2.7171805301252197) internal successors, (442232), 162755 states have internal predecessors, (442232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:09,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162756 states to 162756 states and 442232 transitions. [2021-06-05 18:22:09,474 INFO L78 Accepts]: Start accepts. Automaton has 162756 states and 442232 transitions. Word has length 458 [2021-06-05 18:22:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:09,475 INFO L482 AbstractCegarLoop]: Abstraction has 162756 states and 442232 transitions. [2021-06-05 18:22:09,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 162756 states and 442232 transitions. [2021-06-05 18:22:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:22:09,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:09,687 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:22:09,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:09,888 INFO L430 AbstractCegarLoop]: === Iteration 166 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:09,888 INFO L82 PathProgramCache]: Analyzing trace with hash 681886494, now seen corresponding path program 109 times [2021-06-05 18:22:09,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:09,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726801881] [2021-06-05 18:22:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:10,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:10,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726801881] [2021-06-05 18:22:10,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726801881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:10,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318618] [2021-06-05 18:22:10,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:11,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:11,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:11,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:11,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:11,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:11,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465701599] [2021-06-05 18:22:11,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:11,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:11,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:11,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:11,565 INFO L87 Difference]: Start difference. First operand 162756 states and 442232 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:13,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:13,134 INFO L93 Difference]: Finished difference Result 256941 states and 694792 transitions. [2021-06-05 18:22:13,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:22:13,135 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:22:13,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:13,514 INFO L225 Difference]: With dead ends: 256941 [2021-06-05 18:22:13,515 INFO L226 Difference]: Without dead ends: 256941 [2021-06-05 18:22:13,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=581, Invalid=1675, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:22:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256941 states. Received shutdown request... [2021-06-05 18:22:15,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 18:22:15,143 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:22:15,144 INFO L301 ceAbstractionStarter]: Result for error location t1Thread1of1ForFork1 was TIMEOUT (1/5) [2021-06-05 18:22:15,145 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 18:22:15,146 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:22:15,146 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:22:15,146 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:22:15,146 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:22:15,146 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:22:15,146 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:22:15,146 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:22:15,146 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 18:22:15,149 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-06-05 18:22:15,149 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:22:15,150 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (2/5) [2021-06-05 18:22:15,150 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:22:15,150 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:22:15,150 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:22:15,150 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:22:15,150 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:22:15,150 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:22:15,151 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:22:15,151 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:22:15,151 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t2Thread1of1ForFork0======== [2021-06-05 18:22:15,153 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-06-05 18:22:15,153 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:22:15,154 INFO L301 ceAbstractionStarter]: Result for error location t2Thread1of1ForFork0 was TIMEOUT (3/5) [2021-06-05 18:22:15,154 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:22:15,154 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:22:15,154 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:22:15,154 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:22:15,154 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:22:15,154 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:22:15,154 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:22:15,154 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:22:15,154 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t1======== [2021-06-05 18:22:15,157 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-06-05 18:22:15,157 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:22:15,157 INFO L301 ceAbstractionStarter]: Result for error location t1 was TIMEOUT (4/5) [2021-06-05 18:22:15,158 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:22:15,158 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:22:15,158 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:22:15,158 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:22:15,158 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:22:15,158 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:22:15,158 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:22:15,159 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:22:15,159 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t2======== [2021-06-05 18:22:15,162 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-06-05 18:22:15,162 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:22:15,162 INFO L301 ceAbstractionStarter]: Result for error location t2 was TIMEOUT (5/5) [2021-06-05 18:22:15,162 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 18:22:15,166 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 18:22:15,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:22:15 BasicIcfg [2021-06-05 18:22:15,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 18:22:15,167 INFO L168 Benchmark]: Toolchain (without parser) took 685464.95 ms. Allocated memory was 354.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 316.1 MB in the beginning and 12.6 GB in the end (delta: -12.3 GB). Peak memory consumption was 3.4 GB. Max. memory is 16.0 GB. [2021-06-05 18:22:15,167 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 354.4 MB. Free memory was 334.7 MB in the beginning and 334.6 MB in the end (delta: 136.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 18:22:15,167 INFO L168 Benchmark]: CACSL2BoogieTranslator took 578.97 ms. Allocated memory is still 354.4 MB. Free memory was 316.0 MB in the beginning and 291.1 MB in the end (delta: 24.8 MB). Peak memory consumption was 26.0 MB. Max. memory is 16.0 GB. [2021-06-05 18:22:15,167 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.66 ms. Allocated memory is still 354.4 MB. Free memory was 291.1 MB in the beginning and 288.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 18:22:15,167 INFO L168 Benchmark]: Boogie Preprocessor took 24.51 ms. Allocated memory is still 354.4 MB. Free memory was 288.0 MB in the beginning and 286.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 18:22:15,167 INFO L168 Benchmark]: RCFGBuilder took 489.13 ms. Allocated memory is still 354.4 MB. Free memory was 285.9 MB in the beginning and 252.3 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.0 GB. [2021-06-05 18:22:15,167 INFO L168 Benchmark]: TraceAbstraction took 684321.03 ms. Allocated memory was 354.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 251.3 MB in the beginning and 12.6 GB in the end (delta: -12.3 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.0 GB. [2021-06-05 18:22:15,169 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 354.4 MB. Free memory was 334.7 MB in the beginning and 334.6 MB in the end (delta: 136.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 578.97 ms. Allocated memory is still 354.4 MB. Free memory was 316.0 MB in the beginning and 291.1 MB in the end (delta: 24.8 MB). Peak memory consumption was 26.0 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 44.66 ms. Allocated memory is still 354.4 MB. Free memory was 291.1 MB in the beginning and 288.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.51 ms. Allocated memory is still 354.4 MB. Free memory was 288.0 MB in the beginning and 286.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 489.13 ms. Allocated memory is still 354.4 MB. Free memory was 285.9 MB in the beginning and 252.3 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 684321.03 ms. Allocated memory was 354.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 251.3 MB in the beginning and 12.6 GB in the end (delta: -12.3 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing initial abstraction,while PetriNet2FiniteAutomaton was constructing automaton for Petri net that has has 145 places, 150 transitions, 322 flow. Already constructed 2 states. Currently 1 states in worklist.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: t1Thread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 684113.5ms, OverallIterations: 166, TraceHistogramMax: 12, EmptinessCheckTime: 24318.4ms, AutomataDifference: 154513.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 407.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 24895 SDtfs, 247003 SDslu, 222826 SDs, 0 SdLazy, 25920 SolverSat, 7723 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13724.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 68510 GetRequests, 62618 SyntacticMatches, 1 SemanticMatches, 5891 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49131 ImplicationChecksByTransitivity, 49662.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=167616occurred in iteration=155, InterpolantAutomatonStates: 4763, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 293724.2ms AutomataMinimizationTime, 166 MinimizatonAttempts, 5698557 StatesRemovedByMinimization, 165 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6526.9ms SsaConstructionTime, 42338.7ms SatisfiabilityAnalysisTime, 119393.0ms InterpolantComputationTime, 123968 NumberOfCodeBlocks, 123801 NumberOfCodeBlocksAsserted, 1020 NumberOfCheckSat, 123639 ConstructedInterpolants, 0 QuantifiedInterpolants, 359724 SizeOfPredicates, 3142 NumberOfNonLiveVariables, 119105 ConjunctsInSsa, 3482 ConjunctsInUnsatCore, 329 InterpolantComputations, 4 PerfectInterpolantSequences, 27057/376112 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 3.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: t2Thread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 3.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: t1 with 1 thread instances CFG has 5 procedures, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 3.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: t2 with 1 thread instances CFG has 5 procedures, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 3.6ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown