/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 18:10:37,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 18:10:37,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 18:10:37,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 18:10:37,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 18:10:37,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 18:10:37,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 18:10:37,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 18:10:37,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 18:10:37,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 18:10:37,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 18:10:37,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 18:10:37,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 18:10:37,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 18:10:37,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 18:10:37,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 18:10:37,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 18:10:37,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 18:10:37,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 18:10:37,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 18:10:37,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 18:10:37,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 18:10:37,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 18:10:37,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 18:10:37,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 18:10:37,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 18:10:37,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 18:10:37,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 18:10:37,699 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 18:10:37,715 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 18:10:37,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 18:10:37,715 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 18:10:37,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 18:10:37,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 18:10:37,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 18:10:37,716 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 18:10:37,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 18:10:37,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 18:10:37,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 18:10:37,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 18:10:37,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 18:10:37,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 18:10:37,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 18:10:37,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 18:10:37,717 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 18:10:37,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 18:10:37,717 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 18:10:37,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 18:10:37,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 18:10:37,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 18:10:37,718 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 18:10:37,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 18:10:37,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 18:10:37,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 18:10:37,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 18:10:37,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 18:10:37,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 18:10:37,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 18:10:37,719 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 18:10:37,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 18:10:37,719 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 18:10:37,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 18:10:37,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 18:10:37,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 18:10:37,972 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 18:10:37,972 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 18:10:37,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-1.i [2021-06-05 18:10:38,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78d7ec9b3/fd1d7a217fdf422d8e0368e95b6b046a/FLAGec7d42962 [2021-06-05 18:10:38,466 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 18:10:38,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i [2021-06-05 18:10:38,478 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78d7ec9b3/fd1d7a217fdf422d8e0368e95b6b046a/FLAGec7d42962 [2021-06-05 18:10:38,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78d7ec9b3/fd1d7a217fdf422d8e0368e95b6b046a [2021-06-05 18:10:38,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 18:10:38,490 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 18:10:38,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 18:10:38,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 18:10:38,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 18:10:38,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:10:38" (1/1) ... [2021-06-05 18:10:38,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17fde18a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:38, skipping insertion in model container [2021-06-05 18:10:38,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:10:38" (1/1) ... [2021-06-05 18:10:38,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 18:10:38,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 18:10:38,833 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-1.i[41527,41540] [2021-06-05 18:10:38,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:10:38,857 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 18:10:38,876 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-1.i[41527,41540] [2021-06-05 18:10:38,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:10:38,963 INFO L208 MainTranslator]: Completed translation [2021-06-05 18:10:38,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:38 WrapperNode [2021-06-05 18:10:38,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 18:10:38,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 18:10:38,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 18:10:38,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 18:10:38,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:38" (1/1) ... [2021-06-05 18:10:38,981 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:38" (1/1) ... [2021-06-05 18:10:38,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 18:10:38,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 18:10:38,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 18:10:38,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 18:10:39,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:38" (1/1) ... [2021-06-05 18:10:39,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:38" (1/1) ... [2021-06-05 18:10:39,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:38" (1/1) ... [2021-06-05 18:10:39,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:38" (1/1) ... [2021-06-05 18:10:39,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:38" (1/1) ... [2021-06-05 18:10:39,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:38" (1/1) ... [2021-06-05 18:10:39,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:38" (1/1) ... [2021-06-05 18:10:39,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 18:10:39,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 18:10:39,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 18:10:39,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 18:10:39,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:38" (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 18:10:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 18:10:39,077 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 18:10:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 18:10:39,077 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 18:10:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 18:10:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 18:10:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-06-05 18:10:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 18:10:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-06-05 18:10:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 18:10:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 18:10:39,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 18:10:39,079 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 18:10:39,472 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 18:10:39,472 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-06-05 18:10:39,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:10:39 BoogieIcfgContainer [2021-06-05 18:10:39,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 18:10:39,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 18:10:39,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 18:10:39,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 18:10:39,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 06:10:38" (1/3) ... [2021-06-05 18:10:39,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7fd5b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:10:39, skipping insertion in model container [2021-06-05 18:10:39,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:10:38" (2/3) ... [2021-06-05 18:10:39,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7fd5b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:10:39, skipping insertion in model container [2021-06-05 18:10:39,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:10:39" (3/3) ... [2021-06-05 18:10:39,480 INFO L111 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2021-06-05 18:10:39,484 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 18:10:39,485 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 18:10:39,485 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-05 18:10:39,485 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 18:10:39,523 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,523 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,523 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,523 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,523 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,523 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,523 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,524 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,524 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,524 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,524 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,524 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,524 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,524 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,524 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,525 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,525 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,525 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,525 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,525 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,525 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,525 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,526 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,526 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,526 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,527 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,527 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,527 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,528 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,528 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,528 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,529 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,529 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,529 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,529 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,529 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,529 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,530 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,530 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,530 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,530 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,530 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,530 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,530 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,530 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,530 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,531 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,531 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,531 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,532 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,532 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,532 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,532 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,532 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,533 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,533 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,533 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,533 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,533 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,533 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,533 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,534 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,534 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,534 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,534 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,535 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,535 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,535 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,535 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,535 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,535 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,536 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,536 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,536 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,536 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,536 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,536 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,536 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,536 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,537 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,537 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,537 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,537 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,537 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,537 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,538 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,538 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,540 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,540 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,540 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,541 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,544 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,544 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,544 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,545 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,545 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,545 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,545 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,545 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,545 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,545 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,545 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,545 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,545 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,546 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,546 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,546 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,546 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,546 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,546 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,546 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,546 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,546 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,547 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,547 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,547 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,547 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,547 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,547 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,547 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,547 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,547 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,548 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,548 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,549 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,549 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,549 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,549 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,549 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,549 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,552 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,552 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,552 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,552 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,552 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,552 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,552 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,553 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,553 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,554 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,554 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,554 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,554 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,554 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,554 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,554 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,554 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,554 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,554 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,554 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,554 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,555 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,555 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,555 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,555 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,555 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,555 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,555 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,555 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,555 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,555 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,555 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,556 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,556 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,556 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,556 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,556 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,556 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,556 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,556 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,556 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,557 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,557 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,557 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,557 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,557 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,557 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,557 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,557 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,557 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,558 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,558 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,558 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,562 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,563 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,563 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,563 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,563 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,563 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,563 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,563 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,563 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,563 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,564 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,564 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,564 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,564 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,567 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,568 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,568 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,568 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,569 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,569 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,569 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,569 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,569 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,569 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,569 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,570 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,570 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,570 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,570 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,570 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,570 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,570 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,570 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,570 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,571 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,571 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,571 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,571 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,571 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,571 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,571 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,571 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,571 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,572 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,572 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,572 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,572 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,572 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,572 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,572 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,573 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,573 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,573 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,573 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,575 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,575 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,575 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,575 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,575 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,575 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,576 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,576 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,576 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,576 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,576 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,576 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,576 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,576 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,576 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,576 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,577 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,577 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,577 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,580 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,581 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,581 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,581 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,581 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,581 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,581 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,581 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,581 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,581 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,581 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,582 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,582 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,582 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,582 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,582 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,582 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,582 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,582 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,582 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,582 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,582 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:10:39,583 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 18:10:39,593 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 18:10:39,608 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:10:39,628 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:10:39,628 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:10:39,628 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:10:39,628 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:10:39,628 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:10:39,628 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:10:39,628 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:10:39,628 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t1Thread1of1ForFork1======== [2021-06-05 18:10:39,639 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 152 places, 157 transitions, 336 flow [2021-06-05 18:10:39,938 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9831 states, 9827 states have (on average 2.8614022590821206) internal successors, (28119), 9830 states have internal predecessors, (28119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:39,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 9831 states, 9827 states have (on average 2.8614022590821206) internal successors, (28119), 9830 states have internal predecessors, (28119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:39,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 18:10:39,997 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:39,997 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 18:10:39,998 INFO L430 AbstractCegarLoop]: === Iteration 1 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:40,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1993411196, now seen corresponding path program 1 times [2021-06-05 18:10:40,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:40,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242838626] [2021-06-05 18:10:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:40,245 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 18:10:40,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:40,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242838626] [2021-06-05 18:10:40,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242838626] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:10:40,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:10:40,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 18:10:40,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714689205] [2021-06-05 18:10:40,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 18:10:40,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:40,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 18:10:40,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:10:40,278 INFO L87 Difference]: Start difference. First operand has 9831 states, 9827 states have (on average 2.8614022590821206) internal successors, (28119), 9830 states have internal predecessors, (28119), 0 states have call successors, (0), 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 18:10:40,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:40,417 INFO L93 Difference]: Finished difference Result 14511 states and 39963 transitions. [2021-06-05 18:10:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 18:10:40,419 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 18:10:40,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:40,485 INFO L225 Difference]: With dead ends: 14511 [2021-06-05 18:10:40,485 INFO L226 Difference]: Without dead ends: 12844 [2021-06-05 18:10:40,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:10:40,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12844 states. [2021-06-05 18:10:40,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12844 to 11431. [2021-06-05 18:10:40,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11431 states, 11429 states have (on average 2.7715460670224865) internal successors, (31676), 11430 states have internal predecessors, (31676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:41,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11431 states to 11431 states and 31676 transitions. [2021-06-05 18:10:41,020 INFO L78 Accepts]: Start accepts. Automaton has 11431 states and 31676 transitions. Word has length 54 [2021-06-05 18:10:41,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:41,021 INFO L482 AbstractCegarLoop]: Abstraction has 11431 states and 31676 transitions. [2021-06-05 18:10:41,022 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 18:10:41,022 INFO L276 IsEmpty]: Start isEmpty. Operand 11431 states and 31676 transitions. [2021-06-05 18:10:41,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 18:10:41,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:41,031 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 18:10:41,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 18:10:41,031 INFO L430 AbstractCegarLoop]: === Iteration 2 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:41,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1465764104, now seen corresponding path program 1 times [2021-06-05 18:10:41,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:41,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622343958] [2021-06-05 18:10:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:41,103 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 18:10:41,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:41,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622343958] [2021-06-05 18:10:41,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622343958] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:10:41,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:10:41,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:10:41,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769884960] [2021-06-05 18:10:41,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:10:41,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:41,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:10:41,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:10:41,106 INFO L87 Difference]: Start difference. First operand 11431 states and 31676 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 18:10:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:41,272 INFO L93 Difference]: Finished difference Result 15291 states and 42316 transitions. [2021-06-05 18:10:41,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 18:10:41,273 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 18:10:41,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:41,325 INFO L225 Difference]: With dead ends: 15291 [2021-06-05 18:10:41,325 INFO L226 Difference]: Without dead ends: 15291 [2021-06-05 18:10:41,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:10:41,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15291 states. [2021-06-05 18:10:41,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15291 to 12010. [2021-06-05 18:10:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12010 states, 12008 states have (on average 2.770819453697535) internal successors, (33272), 12009 states have internal predecessors, (33272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12010 states to 12010 states and 33272 transitions. [2021-06-05 18:10:41,640 INFO L78 Accepts]: Start accepts. Automaton has 12010 states and 33272 transitions. Word has length 63 [2021-06-05 18:10:41,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:41,640 INFO L482 AbstractCegarLoop]: Abstraction has 12010 states and 33272 transitions. [2021-06-05 18:10:41,640 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 18:10:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 12010 states and 33272 transitions. [2021-06-05 18:10:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:10:41,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:41,720 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:10:41,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 18:10:41,720 INFO L430 AbstractCegarLoop]: === Iteration 3 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:41,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:41,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1127728619, now seen corresponding path program 1 times [2021-06-05 18:10:41,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:41,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520830354] [2021-06-05 18:10:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:41,818 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 18:10:41,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:41,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520830354] [2021-06-05 18:10:41,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520830354] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:10:41,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:10:41,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 18:10:41,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294398649] [2021-06-05 18:10:41,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 18:10:41,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:41,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 18:10:41,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:10:41,820 INFO L87 Difference]: Start difference. First operand 12010 states and 33272 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:42,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:42,026 INFO L93 Difference]: Finished difference Result 19268 states and 53351 transitions. [2021-06-05 18:10:42,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 18:10:42,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-06-05 18:10:42,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:42,061 INFO L225 Difference]: With dead ends: 19268 [2021-06-05 18:10:42,061 INFO L226 Difference]: Without dead ends: 19268 [2021-06-05 18:10:42,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 18:10:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19268 states. [2021-06-05 18:10:42,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19268 to 12548. [2021-06-05 18:10:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12548 states, 12546 states have (on average 2.768372389606249) internal successors, (34732), 12547 states have internal predecessors, (34732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12548 states to 12548 states and 34732 transitions. [2021-06-05 18:10:42,384 INFO L78 Accepts]: Start accepts. Automaton has 12548 states and 34732 transitions. Word has length 80 [2021-06-05 18:10:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:42,385 INFO L482 AbstractCegarLoop]: Abstraction has 12548 states and 34732 transitions. [2021-06-05 18:10:42,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 12548 states and 34732 transitions. [2021-06-05 18:10:42,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-06-05 18:10:42,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:42,398 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] [2021-06-05 18:10:42,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 18:10:42,398 INFO L430 AbstractCegarLoop]: === Iteration 4 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:42,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2006954144, now seen corresponding path program 1 times [2021-06-05 18:10:42,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:42,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238287984] [2021-06-05 18:10:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:42,455 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 18:10:42,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:42,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238287984] [2021-06-05 18:10:42,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238287984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:42,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718617066] [2021-06-05 18:10:42,456 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 18:10:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:42,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 18:10:42,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:42,847 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 18:10:42,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718617066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:42,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:42,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 18:10:42,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11625094] [2021-06-05 18:10:42,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:10:42,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:42,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:10:42,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:10:42,851 INFO L87 Difference]: Start difference. First operand 12548 states and 34732 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:42,958 INFO L93 Difference]: Finished difference Result 18881 states and 52105 transitions. [2021-06-05 18:10:42,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 18:10:42,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 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 89 [2021-06-05 18:10:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:42,992 INFO L225 Difference]: With dead ends: 18881 [2021-06-05 18:10:42,992 INFO L226 Difference]: Without dead ends: 18881 [2021-06-05 18:10:42,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:10:43,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18881 states. [2021-06-05 18:10:43,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18881 to 17185. [2021-06-05 18:10:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17185 states, 17183 states have (on average 2.7599371471803527) internal successors, (47424), 17184 states have internal predecessors, (47424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:43,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17185 states to 17185 states and 47424 transitions. [2021-06-05 18:10:43,357 INFO L78 Accepts]: Start accepts. Automaton has 17185 states and 47424 transitions. Word has length 89 [2021-06-05 18:10:43,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:43,357 INFO L482 AbstractCegarLoop]: Abstraction has 17185 states and 47424 transitions. [2021-06-05 18:10:43,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:43,358 INFO L276 IsEmpty]: Start isEmpty. Operand 17185 states and 47424 transitions. [2021-06-05 18:10:43,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:10:43,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:43,380 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] [2021-06-05 18:10:43,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:43,598 INFO L430 AbstractCegarLoop]: === Iteration 5 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:43,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:43,599 INFO L82 PathProgramCache]: Analyzing trace with hash 339195111, now seen corresponding path program 1 times [2021-06-05 18:10:43,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:43,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525344565] [2021-06-05 18:10:43,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 18:10:43,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:43,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525344565] [2021-06-05 18:10:43,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525344565] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:10:43,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:10:43,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 18:10:43,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741400346] [2021-06-05 18:10:43,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 18:10:43,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:43,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 18:10:43,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:10:43,649 INFO L87 Difference]: Start difference. First operand 17185 states and 47424 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:43,679 INFO L93 Difference]: Finished difference Result 6917 states and 17819 transitions. [2021-06-05 18:10:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 18:10:43,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 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 115 [2021-06-05 18:10:43,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:43,693 INFO L225 Difference]: With dead ends: 6917 [2021-06-05 18:10:43,693 INFO L226 Difference]: Without dead ends: 6725 [2021-06-05 18:10:43,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:10:43,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6725 states. [2021-06-05 18:10:43,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6725 to 6645. [2021-06-05 18:10:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6645 states, 6643 states have (on average 2.577600481710071) internal successors, (17123), 6644 states have internal predecessors, (17123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:43,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6645 states to 6645 states and 17123 transitions. [2021-06-05 18:10:43,872 INFO L78 Accepts]: Start accepts. Automaton has 6645 states and 17123 transitions. Word has length 115 [2021-06-05 18:10:43,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:43,873 INFO L482 AbstractCegarLoop]: Abstraction has 6645 states and 17123 transitions. [2021-06-05 18:10:43,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 6645 states and 17123 transitions. [2021-06-05 18:10:43,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-06-05 18:10:43,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:43,884 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, 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 18:10:43,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 18:10:43,884 INFO L430 AbstractCegarLoop]: === Iteration 6 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:43,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:43,885 INFO L82 PathProgramCache]: Analyzing trace with hash 730019836, now seen corresponding path program 2 times [2021-06-05 18:10:43,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:43,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21297177] [2021-06-05 18:10:43,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:43,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:43,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21297177] [2021-06-05 18:10:43,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21297177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:43,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96170798] [2021-06-05 18:10:43,981 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 18:10:44,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:10:44,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:10:44,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 18:10:44,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:44,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96170798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:44,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:44,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 18:10:44,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438442859] [2021-06-05 18:10:44,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:10:44,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:44,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:10:44,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:10:44,389 INFO L87 Difference]: Start difference. First operand 6645 states and 17123 transitions. Second operand has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 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 18:10:44,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:44,466 INFO L93 Difference]: Finished difference Result 9517 states and 24500 transitions. [2021-06-05 18:10:44,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 18:10:44,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 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 124 [2021-06-05 18:10:44,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:44,479 INFO L225 Difference]: With dead ends: 9517 [2021-06-05 18:10:44,480 INFO L226 Difference]: Without dead ends: 9517 [2021-06-05 18:10:44,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:10:44,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9517 states. [2021-06-05 18:10:44,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9517 to 8880. [2021-06-05 18:10:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8880 states, 8878 states have (on average 2.576819103401667) internal successors, (22877), 8879 states have internal predecessors, (22877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8880 states to 8880 states and 22877 transitions. [2021-06-05 18:10:44,615 INFO L78 Accepts]: Start accepts. Automaton has 8880 states and 22877 transitions. Word has length 124 [2021-06-05 18:10:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:44,615 INFO L482 AbstractCegarLoop]: Abstraction has 8880 states and 22877 transitions. [2021-06-05 18:10:44,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 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 18:10:44,616 INFO L276 IsEmpty]: Start isEmpty. Operand 8880 states and 22877 transitions. [2021-06-05 18:10:44,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-06-05 18:10:44,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:44,668 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, 1, 1, 1, 1, 1, 1] [2021-06-05 18:10:44,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:44,887 INFO L430 AbstractCegarLoop]: === Iteration 7 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:44,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:44,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1235138845, now seen corresponding path program 1 times [2021-06-05 18:10:44,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:44,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030906827] [2021-06-05 18:10:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:44,970 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 18:10:44,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:44,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030906827] [2021-06-05 18:10:44,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030906827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:44,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018930098] [2021-06-05 18:10:44,970 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 18:10:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:45,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 18:10:45,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:45,261 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 18:10:45,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018930098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:45,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:45,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 18:10:45,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610543331] [2021-06-05 18:10:45,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 18:10:45,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 18:10:45,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 18:10:45,263 INFO L87 Difference]: Start difference. First operand 8880 states and 22877 transitions. Second operand has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:45,378 INFO L93 Difference]: Finished difference Result 12150 states and 31382 transitions. [2021-06-05 18:10:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:10:45,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 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 129 [2021-06-05 18:10:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:45,394 INFO L225 Difference]: With dead ends: 12150 [2021-06-05 18:10:45,394 INFO L226 Difference]: Without dead ends: 12150 [2021-06-05 18:10:45,394 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:10:45,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12150 states. [2021-06-05 18:10:45,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12150 to 10700. [2021-06-05 18:10:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10700 states, 10698 states have (on average 2.598429613011778) internal successors, (27798), 10699 states have internal predecessors, (27798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10700 states to 10700 states and 27798 transitions. [2021-06-05 18:10:45,618 INFO L78 Accepts]: Start accepts. Automaton has 10700 states and 27798 transitions. Word has length 129 [2021-06-05 18:10:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:45,619 INFO L482 AbstractCegarLoop]: Abstraction has 10700 states and 27798 transitions. [2021-06-05 18:10:45,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 10700 states and 27798 transitions. [2021-06-05 18:10:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-06-05 18:10:45,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:45,632 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, 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 18:10:45,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:45,851 INFO L430 AbstractCegarLoop]: === Iteration 8 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:45,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1305308384, now seen corresponding path program 3 times [2021-06-05 18:10:45,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:45,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485871174] [2021-06-05 18:10:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:45,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:45,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485871174] [2021-06-05 18:10:45,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485871174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:45,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375760983] [2021-06-05 18:10:45,942 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 18:10:46,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:10:46,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:10:46,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 18:10:46,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:46,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375760983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:46,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:46,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 18:10:46,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658260705] [2021-06-05 18:10:46,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:10:46,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:46,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:10:46,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:10:46,292 INFO L87 Difference]: Start difference. First operand 10700 states and 27798 transitions. Second operand has 11 states, 11 states have (on average 18.727272727272727) internal successors, (206), 11 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:46,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:46,427 INFO L93 Difference]: Finished difference Result 14707 states and 37949 transitions. [2021-06-05 18:10:46,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 18:10:46,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 18.727272727272727) internal successors, (206), 11 states have internal predecessors, (206), 0 states have call successors, (0), 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 159 [2021-06-05 18:10:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:46,447 INFO L225 Difference]: With dead ends: 14707 [2021-06-05 18:10:46,447 INFO L226 Difference]: Without dead ends: 14707 [2021-06-05 18:10:46,448 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:10:46,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14707 states. [2021-06-05 18:10:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14707 to 12935. [2021-06-05 18:10:46,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12935 states, 12933 states have (on average 2.5942936673625607) internal successors, (33552), 12934 states have internal predecessors, (33552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:46,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12935 states to 12935 states and 33552 transitions. [2021-06-05 18:10:46,689 INFO L78 Accepts]: Start accepts. Automaton has 12935 states and 33552 transitions. Word has length 159 [2021-06-05 18:10:46,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:46,689 INFO L482 AbstractCegarLoop]: Abstraction has 12935 states and 33552 transitions. [2021-06-05 18:10:46,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 18.727272727272727) internal successors, (206), 11 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:46,689 INFO L276 IsEmpty]: Start isEmpty. Operand 12935 states and 33552 transitions. [2021-06-05 18:10:46,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-06-05 18:10:46,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:46,708 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, 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] [2021-06-05 18:10:46,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:46,925 INFO L430 AbstractCegarLoop]: === Iteration 9 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:46,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:46,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1914843189, now seen corresponding path program 2 times [2021-06-05 18:10:46,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:46,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139730435] [2021-06-05 18:10:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:10:47,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:47,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139730435] [2021-06-05 18:10:47,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139730435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:47,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477526011] [2021-06-05 18:10:47,087 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 18:10:47,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:10:47,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:10:47,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 18:10:47,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:10:47,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477526011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:47,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:47,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:10:47,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085196613] [2021-06-05 18:10:47,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:10:47,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:47,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:10:47,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:10:47,430 INFO L87 Difference]: Start difference. First operand 12935 states and 33552 transitions. Second operand has 10 states, 10 states have (on average 20.8) internal successors, (208), 10 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:47,575 INFO L93 Difference]: Finished difference Result 17340 states and 44831 transitions. [2021-06-05 18:10:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:10:47,576 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.8) internal successors, (208), 10 states have internal predecessors, (208), 0 states have call successors, (0), 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 164 [2021-06-05 18:10:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:47,597 INFO L225 Difference]: With dead ends: 17340 [2021-06-05 18:10:47,597 INFO L226 Difference]: Without dead ends: 17340 [2021-06-05 18:10:47,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:10:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17340 states. [2021-06-05 18:10:47,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17340 to 12935. [2021-06-05 18:10:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12935 states, 12933 states have (on average 2.5942936673625607) internal successors, (33552), 12934 states have internal predecessors, (33552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12935 states to 12935 states and 33552 transitions. [2021-06-05 18:10:47,804 INFO L78 Accepts]: Start accepts. Automaton has 12935 states and 33552 transitions. Word has length 164 [2021-06-05 18:10:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:47,804 INFO L482 AbstractCegarLoop]: Abstraction has 12935 states and 33552 transitions. [2021-06-05 18:10:47,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 20.8) internal successors, (208), 10 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 12935 states and 33552 transitions. [2021-06-05 18:10:47,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-06-05 18:10:47,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:47,820 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, 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 18:10:48,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:48,026 INFO L430 AbstractCegarLoop]: === Iteration 10 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:48,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:48,027 INFO L82 PathProgramCache]: Analyzing trace with hash -955169412, now seen corresponding path program 4 times [2021-06-05 18:10:48,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:48,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024095439] [2021-06-05 18:10:48,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:48,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:48,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024095439] [2021-06-05 18:10:48,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024095439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:48,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036230142] [2021-06-05 18:10:48,128 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 18:10:48,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:10:48,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:10:48,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:10:48,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:48,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036230142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:48,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:48,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:10:48,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84784152] [2021-06-05 18:10:48,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:10:48,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:48,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:10:48,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:10:48,529 INFO L87 Difference]: Start difference. First operand 12935 states and 33552 transitions. Second operand has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:48,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:48,701 INFO L93 Difference]: Finished difference Result 17022 states and 43907 transitions. [2021-06-05 18:10:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 18:10:48,702 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 0 states have call successors, (0), 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 194 [2021-06-05 18:10:48,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:48,723 INFO L225 Difference]: With dead ends: 17022 [2021-06-05 18:10:48,723 INFO L226 Difference]: Without dead ends: 17022 [2021-06-05 18:10:48,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:10:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17022 states. [2021-06-05 18:10:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17022 to 15170. [2021-06-05 18:10:48,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15170 states, 15168 states have (on average 2.591376582278481) internal successors, (39306), 15169 states have internal predecessors, (39306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:49,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15170 states to 15170 states and 39306 transitions. [2021-06-05 18:10:49,004 INFO L78 Accepts]: Start accepts. Automaton has 15170 states and 39306 transitions. Word has length 194 [2021-06-05 18:10:49,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:49,004 INFO L482 AbstractCegarLoop]: Abstraction has 15170 states and 39306 transitions. [2021-06-05 18:10:49,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 15170 states and 39306 transitions. [2021-06-05 18:10:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-06-05 18:10:49,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:49,023 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:10:49,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:49,234 INFO L430 AbstractCegarLoop]: === Iteration 11 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:49,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:49,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1696456227, now seen corresponding path program 3 times [2021-06-05 18:10:49,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:49,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569405348] [2021-06-05 18:10:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 138 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 18:10:49,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:49,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569405348] [2021-06-05 18:10:49,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569405348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:49,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075216596] [2021-06-05 18:10:49,415 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 18:10:49,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:10:49,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:10:49,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:10:49,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 115 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:10:50,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075216596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:50,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:50,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 18:10:50,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140545705] [2021-06-05 18:10:50,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:10:50,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:50,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:10:50,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:10:50,006 INFO L87 Difference]: Start difference. First operand 15170 states and 39306 transitions. Second operand has 10 states, 10 states have (on average 22.1) internal successors, (221), 10 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:50,177 INFO L93 Difference]: Finished difference Result 20205 states and 52398 transitions. [2021-06-05 18:10:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 18:10:50,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 22.1) internal successors, (221), 10 states have internal predecessors, (221), 0 states have call successors, (0), 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 199 [2021-06-05 18:10:50,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:50,201 INFO L225 Difference]: With dead ends: 20205 [2021-06-05 18:10:50,201 INFO L226 Difference]: Without dead ends: 20205 [2021-06-05 18:10:50,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:10:50,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20205 states. [2021-06-05 18:10:50,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20205 to 16990. [2021-06-05 18:10:50,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16990 states, 16988 states have (on average 2.603425947727808) internal successors, (44227), 16989 states have internal predecessors, (44227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16990 states to 16990 states and 44227 transitions. [2021-06-05 18:10:50,500 INFO L78 Accepts]: Start accepts. Automaton has 16990 states and 44227 transitions. Word has length 199 [2021-06-05 18:10:50,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:50,501 INFO L482 AbstractCegarLoop]: Abstraction has 16990 states and 44227 transitions. [2021-06-05 18:10:50,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 22.1) internal successors, (221), 10 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:50,501 INFO L276 IsEmpty]: Start isEmpty. Operand 16990 states and 44227 transitions. [2021-06-05 18:10:50,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-06-05 18:10:50,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:50,521 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:10:50,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:50,736 INFO L430 AbstractCegarLoop]: === Iteration 12 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:50,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1809883677, now seen corresponding path program 4 times [2021-06-05 18:10:50,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:50,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633255870] [2021-06-05 18:10:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:10:50,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:50,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633255870] [2021-06-05 18:10:50,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633255870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:50,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017468621] [2021-06-05 18:10:50,836 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 18:10:50,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:10:50,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:10:50,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:10:50,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:10:51,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017468621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:51,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:51,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:10:51,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944882178] [2021-06-05 18:10:51,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:10:51,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:51,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:10:51,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:10:51,262 INFO L87 Difference]: Start difference. First operand 16990 states and 44227 transitions. Second operand has 12 states, 12 states have (on average 20.25) internal successors, (243), 12 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:51,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:51,458 INFO L93 Difference]: Finished difference Result 21555 states and 55914 transitions. [2021-06-05 18:10:51,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 18:10:51,459 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.25) internal successors, (243), 12 states have internal predecessors, (243), 0 states have call successors, (0), 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 199 [2021-06-05 18:10:51,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:51,484 INFO L225 Difference]: With dead ends: 21555 [2021-06-05 18:10:51,484 INFO L226 Difference]: Without dead ends: 21555 [2021-06-05 18:10:51,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:10:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21555 states. [2021-06-05 18:10:51,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21555 to 16990. [2021-06-05 18:10:51,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16990 states, 16988 states have (on average 2.603425947727808) internal successors, (44227), 16989 states have internal predecessors, (44227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16990 states to 16990 states and 44227 transitions. [2021-06-05 18:10:51,777 INFO L78 Accepts]: Start accepts. Automaton has 16990 states and 44227 transitions. Word has length 199 [2021-06-05 18:10:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:51,778 INFO L482 AbstractCegarLoop]: Abstraction has 16990 states and 44227 transitions. [2021-06-05 18:10:51,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 20.25) internal successors, (243), 12 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:51,778 INFO L276 IsEmpty]: Start isEmpty. Operand 16990 states and 44227 transitions. [2021-06-05 18:10:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-06-05 18:10:51,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:51,798 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, 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 18:10:52,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 18:10:52,013 INFO L430 AbstractCegarLoop]: === Iteration 13 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:52,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:52,013 INFO L82 PathProgramCache]: Analyzing trace with hash -782396000, now seen corresponding path program 5 times [2021-06-05 18:10:52,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:52,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370900046] [2021-06-05 18:10:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:52,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:52,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370900046] [2021-06-05 18:10:52,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370900046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:52,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008245650] [2021-06-05 18:10:52,146 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 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 18:10:52,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:10:52,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:10:52,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:10:52,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:52,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008245650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:52,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:52,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:10:52,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307826719] [2021-06-05 18:10:52,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:10:52,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:52,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:10:52,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:10:52,649 INFO L87 Difference]: Start difference. First operand 16990 states and 44227 transitions. Second operand has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 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 18:10:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:52,881 INFO L93 Difference]: Finished difference Result 22762 states and 58965 transitions. [2021-06-05 18:10:52,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:10:52,881 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 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 229 [2021-06-05 18:10:52,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:52,906 INFO L225 Difference]: With dead ends: 22762 [2021-06-05 18:10:52,907 INFO L226 Difference]: Without dead ends: 22762 [2021-06-05 18:10:52,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:10:52,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22762 states. [2021-06-05 18:10:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22762 to 19225. [2021-06-05 18:10:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19225 states, 19223 states have (on average 2.6000624252197886) internal successors, (49981), 19224 states have internal predecessors, (49981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:53,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19225 states to 19225 states and 49981 transitions. [2021-06-05 18:10:53,228 INFO L78 Accepts]: Start accepts. Automaton has 19225 states and 49981 transitions. Word has length 229 [2021-06-05 18:10:53,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:53,228 INFO L482 AbstractCegarLoop]: Abstraction has 19225 states and 49981 transitions. [2021-06-05 18:10:53,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 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 18:10:53,228 INFO L276 IsEmpty]: Start isEmpty. Operand 19225 states and 49981 transitions. [2021-06-05 18:10:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-06-05 18:10:53,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:53,252 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, 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, 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 18:10:53,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:53,457 INFO L430 AbstractCegarLoop]: === Iteration 14 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash 752668260, now seen corresponding path program 1 times [2021-06-05 18:10:53,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:53,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190993486] [2021-06-05 18:10:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 9 proven. 155 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 18:10:53,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:53,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190993486] [2021-06-05 18:10:53,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190993486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:53,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740434374] [2021-06-05 18:10:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:53,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:10:53,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 9 proven. 131 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-06-05 18:10:54,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740434374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:54,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:54,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-06-05 18:10:54,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40745600] [2021-06-05 18:10:54,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:10:54,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:54,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:10:54,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:10:54,049 INFO L87 Difference]: Start difference. First operand 19225 states and 49981 transitions. Second operand has 11 states, 11 states have (on average 21.90909090909091) internal successors, (241), 11 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:54,268 INFO L93 Difference]: Finished difference Result 31875 states and 82897 transitions. [2021-06-05 18:10:54,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 18:10:54,269 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 21.90909090909091) internal successors, (241), 11 states have internal predecessors, (241), 0 states have call successors, (0), 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 233 [2021-06-05 18:10:54,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:54,307 INFO L225 Difference]: With dead ends: 31875 [2021-06-05 18:10:54,307 INFO L226 Difference]: Without dead ends: 31875 [2021-06-05 18:10:54,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:10:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31875 states. [2021-06-05 18:10:54,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31875 to 20565. [2021-06-05 18:10:54,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20565 states, 20563 states have (on average 2.6065262850751347) internal successors, (53598), 20564 states have internal predecessors, (53598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20565 states to 20565 states and 53598 transitions. [2021-06-05 18:10:54,636 INFO L78 Accepts]: Start accepts. Automaton has 20565 states and 53598 transitions. Word has length 233 [2021-06-05 18:10:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:54,636 INFO L482 AbstractCegarLoop]: Abstraction has 20565 states and 53598 transitions. [2021-06-05 18:10:54,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 21.90909090909091) internal successors, (241), 11 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:54,636 INFO L276 IsEmpty]: Start isEmpty. Operand 20565 states and 53598 transitions. [2021-06-05 18:10:54,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-06-05 18:10:54,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:54,660 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:10:54,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:10:54,860 INFO L430 AbstractCegarLoop]: === Iteration 15 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:54,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1274254751, now seen corresponding path program 5 times [2021-06-05 18:10:54,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:54,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188388068] [2021-06-05 18:10:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 258 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 18:10:55,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:55,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188388068] [2021-06-05 18:10:55,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188388068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:55,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218242633] [2021-06-05 18:10:55,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:10:55,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:10:55,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:10:55,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:10:55,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:10:55,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218242633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:55,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:55,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 18:10:55,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066172531] [2021-06-05 18:10:55,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:10:55,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:55,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:10:55,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:10:55,508 INFO L87 Difference]: Start difference. First operand 20565 states and 53598 transitions. Second operand has 12 states, 12 states have (on average 21.333333333333332) internal successors, (256), 12 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:55,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:55,688 INFO L93 Difference]: Finished difference Result 27690 states and 72018 transitions. [2021-06-05 18:10:55,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:10:55,689 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.333333333333332) internal successors, (256), 12 states have internal predecessors, (256), 0 states have call successors, (0), 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 234 [2021-06-05 18:10:55,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:55,723 INFO L225 Difference]: With dead ends: 27690 [2021-06-05 18:10:55,724 INFO L226 Difference]: Without dead ends: 27690 [2021-06-05 18:10:55,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:10:55,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27690 states. [2021-06-05 18:10:55,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27690 to 23465. [2021-06-05 18:10:56,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23465 states, 23463 states have (on average 2.6199974427822528) internal successors, (61473), 23464 states have internal predecessors, (61473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23465 states to 23465 states and 61473 transitions. [2021-06-05 18:10:56,037 INFO L78 Accepts]: Start accepts. Automaton has 23465 states and 61473 transitions. Word has length 234 [2021-06-05 18:10:56,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:56,038 INFO L482 AbstractCegarLoop]: Abstraction has 23465 states and 61473 transitions. [2021-06-05 18:10:56,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 21.333333333333332) internal successors, (256), 12 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:56,038 INFO L276 IsEmpty]: Start isEmpty. Operand 23465 states and 61473 transitions. [2021-06-05 18:10:56,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-06-05 18:10:56,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:56,061 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:10:56,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 18:10:56,265 INFO L430 AbstractCegarLoop]: === Iteration 16 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:56,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:56,265 INFO L82 PathProgramCache]: Analyzing trace with hash 428943093, now seen corresponding path program 6 times [2021-06-05 18:10:56,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:56,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330180651] [2021-06-05 18:10:56,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:10:56,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:56,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330180651] [2021-06-05 18:10:56,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330180651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:56,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890255283] [2021-06-05 18:10:56,361 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 18:10:56,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:10:56,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:10:56,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:10:56,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:56,802 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:10:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:10:56,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890255283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:56,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:56,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:10:56,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998395000] [2021-06-05 18:10:56,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:10:56,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:56,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:10:56,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:10:56,942 INFO L87 Difference]: Start difference. First operand 23465 states and 61473 transitions. Second operand has 12 states, 12 states have (on average 21.333333333333332) internal successors, (256), 12 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:57,144 INFO L93 Difference]: Finished difference Result 35440 states and 92193 transitions. [2021-06-05 18:10:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 18:10:57,145 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.333333333333332) internal successors, (256), 12 states have internal predecessors, (256), 0 states have call successors, (0), 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 234 [2021-06-05 18:10:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:57,191 INFO L225 Difference]: With dead ends: 35440 [2021-06-05 18:10:57,191 INFO L226 Difference]: Without dead ends: 35440 [2021-06-05 18:10:57,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:10:57,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35440 states. [2021-06-05 18:10:57,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35440 to 25285. [2021-06-05 18:10:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25285 states, 25283 states have (on average 2.6260333030099274) internal successors, (66394), 25284 states have internal predecessors, (66394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:57,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25285 states to 25285 states and 66394 transitions. [2021-06-05 18:10:57,671 INFO L78 Accepts]: Start accepts. Automaton has 25285 states and 66394 transitions. Word has length 234 [2021-06-05 18:10:57,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:57,672 INFO L482 AbstractCegarLoop]: Abstraction has 25285 states and 66394 transitions. [2021-06-05 18:10:57,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 21.333333333333332) internal successors, (256), 12 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 25285 states and 66394 transitions. [2021-06-05 18:10:57,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-06-05 18:10:57,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:57,698 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:10:57,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 18:10:57,898 INFO L430 AbstractCegarLoop]: === Iteration 17 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:57,898 INFO L82 PathProgramCache]: Analyzing trace with hash -359684299, now seen corresponding path program 7 times [2021-06-05 18:10:57,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:57,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333954062] [2021-06-05 18:10:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 256 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:10:57,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:57,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333954062] [2021-06-05 18:10:57,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333954062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:57,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543664109] [2021-06-05 18:10:57,999 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 18:10:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:58,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:10:58,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:58,397 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 256 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:10:58,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543664109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:58,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:58,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:10:58,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310881232] [2021-06-05 18:10:58,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:10:58,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:58,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:10:58,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:10:58,501 INFO L87 Difference]: Start difference. First operand 25285 states and 66394 transitions. Second operand has 14 states, 14 states have (on average 19.857142857142858) internal successors, (278), 14 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:58,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:10:58,724 INFO L93 Difference]: Finished difference Result 34570 states and 90170 transitions. [2021-06-05 18:10:58,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:10:58,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.857142857142858) internal successors, (278), 14 states have internal predecessors, (278), 0 states have call successors, (0), 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 234 [2021-06-05 18:10:58,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:10:58,767 INFO L225 Difference]: With dead ends: 34570 [2021-06-05 18:10:58,767 INFO L226 Difference]: Without dead ends: 34570 [2021-06-05 18:10:58,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:10:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34570 states. [2021-06-05 18:10:59,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34570 to 25285. [2021-06-05 18:10:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25285 states, 25283 states have (on average 2.6260333030099274) internal successors, (66394), 25284 states have internal predecessors, (66394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25285 states to 25285 states and 66394 transitions. [2021-06-05 18:10:59,169 INFO L78 Accepts]: Start accepts. Automaton has 25285 states and 66394 transitions. Word has length 234 [2021-06-05 18:10:59,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:10:59,170 INFO L482 AbstractCegarLoop]: Abstraction has 25285 states and 66394 transitions. [2021-06-05 18:10:59,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 19.857142857142858) internal successors, (278), 14 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:10:59,170 INFO L276 IsEmpty]: Start isEmpty. Operand 25285 states and 66394 transitions. [2021-06-05 18:10:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-06-05 18:10:59,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:10:59,198 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, 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 18:10:59,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 18:10:59,399 INFO L430 AbstractCegarLoop]: === Iteration 18 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:10:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:10:59,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1578316540, now seen corresponding path program 6 times [2021-06-05 18:10:59,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:10:59,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375638653] [2021-06-05 18:10:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:10:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:10:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:59,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:10:59,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375638653] [2021-06-05 18:10:59,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375638653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:59,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113901281] [2021-06-05 18:10:59,522 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 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 18:10:59,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:10:59,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:10:59,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:10:59,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:10:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:10:59,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113901281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:10:59,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:10:59,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:10:59,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929880008] [2021-06-05 18:10:59,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:10:59,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:10:59,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:10:59,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:10:59,977 INFO L87 Difference]: Start difference. First operand 25285 states and 66394 transitions. Second operand has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 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 18:11:00,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:00,336 INFO L93 Difference]: Finished difference Result 31662 states and 82561 transitions. [2021-06-05 18:11:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:11:00,336 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 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 264 [2021-06-05 18:11:00,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:00,371 INFO L225 Difference]: With dead ends: 31662 [2021-06-05 18:11:00,372 INFO L226 Difference]: Without dead ends: 31662 [2021-06-05 18:11:00,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:11:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31662 states. [2021-06-05 18:11:00,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31662 to 27520. [2021-06-05 18:11:00,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27520 states, 27518 states have (on average 2.621847517988226) internal successors, (72148), 27519 states have internal predecessors, (72148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27520 states to 27520 states and 72148 transitions. [2021-06-05 18:11:00,744 INFO L78 Accepts]: Start accepts. Automaton has 27520 states and 72148 transitions. Word has length 264 [2021-06-05 18:11:00,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:00,744 INFO L482 AbstractCegarLoop]: Abstraction has 27520 states and 72148 transitions. [2021-06-05 18:11:00,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 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 18:11:00,744 INFO L276 IsEmpty]: Start isEmpty. Operand 27520 states and 72148 transitions. [2021-06-05 18:11:00,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-06-05 18:11:00,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:00,775 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, 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, 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 18:11:00,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:00,976 INFO L430 AbstractCegarLoop]: === Iteration 19 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:00,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1018389106, now seen corresponding path program 2 times [2021-06-05 18:11:00,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:00,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477477362] [2021-06-05 18:11:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 12 proven. 275 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 18:11:01,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:01,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477477362] [2021-06-05 18:11:01,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477477362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:01,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199799800] [2021-06-05 18:11:01,082 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 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 18:11:01,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:11:01,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:01,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:11:01,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 12 proven. 251 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-06-05 18:11:01,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199799800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:01,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:01,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 18:11:01,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115664756] [2021-06-05 18:11:01,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:11:01,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:01,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:11:01,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:11:01,503 INFO L87 Difference]: Start difference. First operand 27520 states and 72148 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 18:11:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:01,762 INFO L93 Difference]: Finished difference Result 41645 states and 109000 transitions. [2021-06-05 18:11:01,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:11:01,762 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 268 [2021-06-05 18:11:01,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:01,811 INFO L225 Difference]: With dead ends: 41645 [2021-06-05 18:11:01,811 INFO L226 Difference]: Without dead ends: 41645 [2021-06-05 18:11:01,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:11:01,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41645 states. [2021-06-05 18:11:02,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41645 to 27520. [2021-06-05 18:11:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27520 states, 27518 states have (on average 2.621847517988226) internal successors, (72148), 27519 states have internal predecessors, (72148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27520 states to 27520 states and 72148 transitions. [2021-06-05 18:11:02,303 INFO L78 Accepts]: Start accepts. Automaton has 27520 states and 72148 transitions. Word has length 268 [2021-06-05 18:11:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:02,303 INFO L482 AbstractCegarLoop]: Abstraction has 27520 states and 72148 transitions. [2021-06-05 18:11:02,304 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 18:11:02,304 INFO L276 IsEmpty]: Start isEmpty. Operand 27520 states and 72148 transitions. [2021-06-05 18:11:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-06-05 18:11:02,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:02,334 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, 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, 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 18:11:02,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:02,535 INFO L430 AbstractCegarLoop]: === Iteration 20 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash 534547836, now seen corresponding path program 3 times [2021-06-05 18:11:02,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:02,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604323327] [2021-06-05 18:11:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 12 proven. 252 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-05 18:11:02,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:02,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604323327] [2021-06-05 18:11:02,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604323327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:02,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079045328] [2021-06-05 18:11:02,622 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 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 18:11:02,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 18:11:02,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:02,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:11:02,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-06-05 18:11:03,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079045328] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:11:03,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 18:11:03,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-06-05 18:11:03,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562218056] [2021-06-05 18:11:03,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:11:03,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:03,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:11:03,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:11:03,020 INFO L87 Difference]: Start difference. First operand 27520 states and 72148 transitions. Second operand has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:03,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:03,184 INFO L93 Difference]: Finished difference Result 36820 states and 96265 transitions. [2021-06-05 18:11:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 18:11:03,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 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 268 [2021-06-05 18:11:03,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:03,225 INFO L225 Difference]: With dead ends: 36820 [2021-06-05 18:11:03,225 INFO L226 Difference]: Without dead ends: 36820 [2021-06-05 18:11:03,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:11:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36820 states. [2021-06-05 18:11:03,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36820 to 28740. [2021-06-05 18:11:03,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28740 states, 28738 states have (on average 2.624364952327928) internal successors, (75419), 28739 states have internal predecessors, (75419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28740 states to 28740 states and 75419 transitions. [2021-06-05 18:11:03,720 INFO L78 Accepts]: Start accepts. Automaton has 28740 states and 75419 transitions. Word has length 268 [2021-06-05 18:11:03,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:03,720 INFO L482 AbstractCegarLoop]: Abstraction has 28740 states and 75419 transitions. [2021-06-05 18:11:03,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:03,720 INFO L276 IsEmpty]: Start isEmpty. Operand 28740 states and 75419 transitions. [2021-06-05 18:11:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-06-05 18:11:03,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:03,752 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:11:03,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:03,956 INFO L430 AbstractCegarLoop]: === Iteration 21 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:03,956 INFO L82 PathProgramCache]: Analyzing trace with hash 931003037, now seen corresponding path program 8 times [2021-06-05 18:11:03,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:03,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397644571] [2021-06-05 18:11:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 413 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 18:11:04,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:04,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397644571] [2021-06-05 18:11:04,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397644571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:04,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098355740] [2021-06-05 18:11:04,075 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 18:11:04,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:11:04,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:04,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:11:04,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:04,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098355740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:04,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:04,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 18:11:04,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893362478] [2021-06-05 18:11:04,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:11:04,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:04,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:11:04,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:11:04,500 INFO L87 Difference]: Start difference. First operand 28740 states and 75419 transitions. Second operand has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:04,737 INFO L93 Difference]: Finished difference Result 34730 states and 90551 transitions. [2021-06-05 18:11:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:11:04,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 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 269 [2021-06-05 18:11:04,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:04,780 INFO L225 Difference]: With dead ends: 34730 [2021-06-05 18:11:04,780 INFO L226 Difference]: Without dead ends: 34730 [2021-06-05 18:11:04,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:11:04,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34730 states. [2021-06-05 18:11:05,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34730 to 29820. [2021-06-05 18:11:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29820 states, 29818 states have (on average 2.6283788315782415) internal successors, (78373), 29819 states have internal predecessors, (78373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29820 states to 29820 states and 78373 transitions. [2021-06-05 18:11:05,262 INFO L78 Accepts]: Start accepts. Automaton has 29820 states and 78373 transitions. Word has length 269 [2021-06-05 18:11:05,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:05,263 INFO L482 AbstractCegarLoop]: Abstraction has 29820 states and 78373 transitions. [2021-06-05 18:11:05,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:05,263 INFO L276 IsEmpty]: Start isEmpty. Operand 29820 states and 78373 transitions. [2021-06-05 18:11:05,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-06-05 18:11:05,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:05,297 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:11:05,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 18:11:05,517 INFO L430 AbstractCegarLoop]: === Iteration 22 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:05,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1192511097, now seen corresponding path program 9 times [2021-06-05 18:11:05,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:05,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497697436] [2021-06-05 18:11:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:05,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:05,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497697436] [2021-06-05 18:11:05,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497697436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:05,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243631863] [2021-06-05 18:11:05,615 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 18:11:05,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:11:05,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:05,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:11:05,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:06,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243631863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:06,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:06,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:11:06,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288833752] [2021-06-05 18:11:06,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:11:06,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:06,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:11:06,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:11:06,056 INFO L87 Difference]: Start difference. First operand 29820 states and 78373 transitions. Second operand has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:06,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:06,288 INFO L93 Difference]: Finished difference Result 40685 states and 106189 transitions. [2021-06-05 18:11:06,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:11:06,288 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 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 269 [2021-06-05 18:11:06,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:06,335 INFO L225 Difference]: With dead ends: 40685 [2021-06-05 18:11:06,336 INFO L226 Difference]: Without dead ends: 40685 [2021-06-05 18:11:06,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:11:06,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40685 states. [2021-06-05 18:11:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40685 to 32720. [2021-06-05 18:11:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32720 states, 32718 states have (on average 2.6361024512500766) internal successors, (86248), 32719 states have internal predecessors, (86248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32720 states to 32720 states and 86248 transitions. [2021-06-05 18:11:06,908 INFO L78 Accepts]: Start accepts. Automaton has 32720 states and 86248 transitions. Word has length 269 [2021-06-05 18:11:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:06,908 INFO L482 AbstractCegarLoop]: Abstraction has 32720 states and 86248 transitions. [2021-06-05 18:11:06,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 32720 states and 86248 transitions. [2021-06-05 18:11:06,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-06-05 18:11:06,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:06,944 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:11:07,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 18:11:07,146 INFO L430 AbstractCegarLoop]: === Iteration 23 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:07,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:07,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2037822755, now seen corresponding path program 10 times [2021-06-05 18:11:07,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:07,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640841092] [2021-06-05 18:11:07,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:07,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:07,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640841092] [2021-06-05 18:11:07,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640841092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:07,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443303386] [2021-06-05 18:11:07,274 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 18:11:07,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:11:07,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:07,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:11:07,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:07,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443303386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:07,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:07,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:11:07,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133061674] [2021-06-05 18:11:07,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:11:07,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:07,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:11:07,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:11:07,787 INFO L87 Difference]: Start difference. First operand 32720 states and 86248 transitions. Second operand has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:08,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:08,176 INFO L93 Difference]: Finished difference Result 41535 states and 108864 transitions. [2021-06-05 18:11:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:11:08,177 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 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 269 [2021-06-05 18:11:08,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:08,224 INFO L225 Difference]: With dead ends: 41535 [2021-06-05 18:11:08,224 INFO L226 Difference]: Without dead ends: 41535 [2021-06-05 18:11:08,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:11:08,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41535 states. [2021-06-05 18:11:08,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41535 to 34540. [2021-06-05 18:11:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34540 states, 34538 states have (on average 2.6396722450634083) internal successors, (91169), 34539 states have internal predecessors, (91169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:08,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34540 states to 34540 states and 91169 transitions. [2021-06-05 18:11:08,714 INFO L78 Accepts]: Start accepts. Automaton has 34540 states and 91169 transitions. Word has length 269 [2021-06-05 18:11:08,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:08,714 INFO L482 AbstractCegarLoop]: Abstraction has 34540 states and 91169 transitions. [2021-06-05 18:11:08,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 34540 states and 91169 transitions. [2021-06-05 18:11:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-06-05 18:11:08,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:08,751 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, 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 18:11:08,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 18:11:08,952 INFO L430 AbstractCegarLoop]: === Iteration 24 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:08,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1182222304, now seen corresponding path program 7 times [2021-06-05 18:11:08,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:08,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774462730] [2021-06-05 18:11:08,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:09,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:09,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774462730] [2021-06-05 18:11:09,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774462730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:09,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629875905] [2021-06-05 18:11:09,256 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 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 18:11:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:09,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:11:09,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:09,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629875905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:09,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:09,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:11:09,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713828855] [2021-06-05 18:11:09,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:11:09,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:09,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:11:09,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:11:09,749 INFO L87 Difference]: Start difference. First operand 34540 states and 91169 transitions. Second operand has 19 states, 19 states have (on average 18.210526315789473) internal successors, (346), 19 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:10,057 INFO L93 Difference]: Finished difference Result 42602 states and 111719 transitions. [2021-06-05 18:11:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:11:10,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 18.210526315789473) internal successors, (346), 19 states have internal predecessors, (346), 0 states have call successors, (0), 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 299 [2021-06-05 18:11:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:10,107 INFO L225 Difference]: With dead ends: 42602 [2021-06-05 18:11:10,108 INFO L226 Difference]: Without dead ends: 42602 [2021-06-05 18:11:10,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:11:10,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42602 states. [2021-06-05 18:11:10,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42602 to 36775. [2021-06-05 18:11:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36775 states, 36773 states have (on average 2.6357109836020993) internal successors, (96923), 36774 states have internal predecessors, (96923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36775 states to 36775 states and 96923 transitions. [2021-06-05 18:11:10,679 INFO L78 Accepts]: Start accepts. Automaton has 36775 states and 96923 transitions. Word has length 299 [2021-06-05 18:11:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:10,679 INFO L482 AbstractCegarLoop]: Abstraction has 36775 states and 96923 transitions. [2021-06-05 18:11:10,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 18.210526315789473) internal successors, (346), 19 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 36775 states and 96923 transitions. [2021-06-05 18:11:10,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-06-05 18:11:10,716 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:10,716 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, 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, 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 18:11:10,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 18:11:10,917 INFO L430 AbstractCegarLoop]: === Iteration 25 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:10,917 INFO L82 PathProgramCache]: Analyzing trace with hash -833379749, now seen corresponding path program 4 times [2021-06-05 18:11:10,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:10,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746500760] [2021-06-05 18:11:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 56 proven. 229 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-06-05 18:11:11,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:11,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746500760] [2021-06-05 18:11:11,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746500760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:11,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514618604] [2021-06-05 18:11:11,011 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 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 18:11:11,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:11:11,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:11,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:11:11,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 56 proven. 229 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-06-05 18:11:11,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514618604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:11,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:11,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:11:11,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113121502] [2021-06-05 18:11:11,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:11:11,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:11,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:11:11,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:11:11,549 INFO L87 Difference]: Start difference. First operand 36775 states and 96923 transitions. Second operand has 13 states, 13 states have (on average 21.615384615384617) internal successors, (281), 13 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:11,935 INFO L93 Difference]: Finished difference Result 53420 states and 139671 transitions. [2021-06-05 18:11:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 18:11:11,935 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.615384615384617) internal successors, (281), 13 states have internal predecessors, (281), 0 states have call successors, (0), 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 302 [2021-06-05 18:11:11,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:11,995 INFO L225 Difference]: With dead ends: 53420 [2021-06-05 18:11:11,996 INFO L226 Difference]: Without dead ends: 53420 [2021-06-05 18:11:11,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:11:12,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53420 states. [2021-06-05 18:11:12,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53420 to 34955. [2021-06-05 18:11:12,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34955 states, 34953 states have (on average 2.632163190570194) internal successors, (92002), 34954 states have internal predecessors, (92002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34955 states to 34955 states and 92002 transitions. [2021-06-05 18:11:12,690 INFO L78 Accepts]: Start accepts. Automaton has 34955 states and 92002 transitions. Word has length 302 [2021-06-05 18:11:12,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:12,690 INFO L482 AbstractCegarLoop]: Abstraction has 34955 states and 92002 transitions. [2021-06-05 18:11:12,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 21.615384615384617) internal successors, (281), 13 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 34955 states and 92002 transitions. [2021-06-05 18:11:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-06-05 18:11:12,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:12,726 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, 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, 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 18:11:12,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 18:11:12,927 INFO L430 AbstractCegarLoop]: === Iteration 26 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:12,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:12,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1047735780, now seen corresponding path program 5 times [2021-06-05 18:11:12,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:12,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357996981] [2021-06-05 18:11:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 15 proven. 409 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:11:13,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:13,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357996981] [2021-06-05 18:11:13,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357996981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:13,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139073334] [2021-06-05 18:11:13,029 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 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 18:11:13,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:11:13,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:13,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:11:13,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 15 proven. 385 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-06-05 18:11:13,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139073334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:13,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:13,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 18:11:13,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092086378] [2021-06-05 18:11:13,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:11:13,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:13,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:11:13,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:11:13,500 INFO L87 Difference]: Start difference. First operand 34955 states and 92002 transitions. Second operand has 13 states, 13 states have (on average 22.23076923076923) internal successors, (289), 13 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:13,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:13,914 INFO L93 Difference]: Finished difference Result 50680 states and 132431 transitions. [2021-06-05 18:11:13,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:11:13,915 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 22.23076923076923) internal successors, (289), 13 states have internal predecessors, (289), 0 states have call successors, (0), 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 303 [2021-06-05 18:11:13,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:13,969 INFO L225 Difference]: With dead ends: 50680 [2021-06-05 18:11:13,969 INFO L226 Difference]: Without dead ends: 50680 [2021-06-05 18:11:13,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:11:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50680 states. [2021-06-05 18:11:14,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50680 to 38115. [2021-06-05 18:11:14,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38115 states, 38113 states have (on average 2.637945058116653) internal successors, (100540), 38114 states have internal predecessors, (100540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:14,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38115 states to 38115 states and 100540 transitions. [2021-06-05 18:11:14,593 INFO L78 Accepts]: Start accepts. Automaton has 38115 states and 100540 transitions. Word has length 303 [2021-06-05 18:11:14,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:14,593 INFO L482 AbstractCegarLoop]: Abstraction has 38115 states and 100540 transitions. [2021-06-05 18:11:14,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 22.23076923076923) internal successors, (289), 13 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:14,593 INFO L276 IsEmpty]: Start isEmpty. Operand 38115 states and 100540 transitions. [2021-06-05 18:11:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-06-05 18:11:14,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:14,632 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, 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, 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 18:11:14,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:14,849 INFO L430 AbstractCegarLoop]: === Iteration 27 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:14,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:14,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1354745924, now seen corresponding path program 6 times [2021-06-05 18:11:14,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:14,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745069284] [2021-06-05 18:11:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 59 proven. 398 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:11:15,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:15,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745069284] [2021-06-05 18:11:15,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745069284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:15,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593699173] [2021-06-05 18:11:15,091 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 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 18:11:15,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:11:15,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:15,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:11:15,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 256 proven. 65 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-06-05 18:11:15,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593699173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:15,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:15,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-06-05 18:11:15,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441866017] [2021-06-05 18:11:15,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:11:15,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:15,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:11:15,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:11:15,687 INFO L87 Difference]: Start difference. First operand 38115 states and 100540 transitions. Second operand has 22 states, 22 states have (on average 22.40909090909091) internal successors, (493), 22 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:16,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:16,431 INFO L93 Difference]: Finished difference Result 63300 states and 165509 transitions. [2021-06-05 18:11:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:11:16,431 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 22.40909090909091) internal successors, (493), 22 states have internal predecessors, (493), 0 states have call successors, (0), 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 303 [2021-06-05 18:11:16,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:16,511 INFO L225 Difference]: With dead ends: 63300 [2021-06-05 18:11:16,511 INFO L226 Difference]: Without dead ends: 63300 [2021-06-05 18:11:16,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 474.9ms TimeCoverageRelationStatistics Valid=623, Invalid=2029, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:11:16,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63300 states. [2021-06-05 18:11:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63300 to 38375. [2021-06-05 18:11:17,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38375 states, 38373 states have (on average 2.639225497094311) internal successors, (101275), 38374 states have internal predecessors, (101275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:17,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38375 states to 38375 states and 101275 transitions. [2021-06-05 18:11:17,433 INFO L78 Accepts]: Start accepts. Automaton has 38375 states and 101275 transitions. Word has length 303 [2021-06-05 18:11:17,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:17,434 INFO L482 AbstractCegarLoop]: Abstraction has 38375 states and 101275 transitions. [2021-06-05 18:11:17,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 22.40909090909091) internal successors, (493), 22 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:17,434 INFO L276 IsEmpty]: Start isEmpty. Operand 38375 states and 101275 transitions. [2021-06-05 18:11:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-06-05 18:11:17,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:17,472 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:11:17,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 18:11:17,673 INFO L430 AbstractCegarLoop]: === Iteration 28 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:17,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:17,676 INFO L82 PathProgramCache]: Analyzing trace with hash -663550753, now seen corresponding path program 11 times [2021-06-05 18:11:17,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:17,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109313630] [2021-06-05 18:11:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 603 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 18:11:17,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:17,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109313630] [2021-06-05 18:11:17,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109313630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:17,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602705367] [2021-06-05 18:11:17,825 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 18:11:17,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:11:17,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:17,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:11:17,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:18,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602705367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:18,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:18,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:11:18,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664478097] [2021-06-05 18:11:18,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:11:18,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:18,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:11:18,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:11:18,286 INFO L87 Difference]: Start difference. First operand 38375 states and 101275 transitions. Second operand has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:18,777 INFO L93 Difference]: Finished difference Result 45655 states and 119469 transitions. [2021-06-05 18:11:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:11:18,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 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 304 [2021-06-05 18:11:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:18,831 INFO L225 Difference]: With dead ends: 45655 [2021-06-05 18:11:18,831 INFO L226 Difference]: Without dead ends: 45655 [2021-06-05 18:11:18,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:11:18,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45655 states. [2021-06-05 18:11:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45655 to 38375. [2021-06-05 18:11:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38375 states, 38373 states have (on average 2.639225497094311) internal successors, (101275), 38374 states have internal predecessors, (101275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38375 states to 38375 states and 101275 transitions. [2021-06-05 18:11:19,462 INFO L78 Accepts]: Start accepts. Automaton has 38375 states and 101275 transitions. Word has length 304 [2021-06-05 18:11:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:19,462 INFO L482 AbstractCegarLoop]: Abstraction has 38375 states and 101275 transitions. [2021-06-05 18:11:19,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:19,462 INFO L276 IsEmpty]: Start isEmpty. Operand 38375 states and 101275 transitions. [2021-06-05 18:11:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-06-05 18:11:19,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:19,499 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:11:19,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:19,700 INFO L430 AbstractCegarLoop]: === Iteration 29 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:19,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:19,700 INFO L82 PathProgramCache]: Analyzing trace with hash -444199499, now seen corresponding path program 12 times [2021-06-05 18:11:19,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:19,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886094005] [2021-06-05 18:11:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:19,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:19,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886094005] [2021-06-05 18:11:19,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886094005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:19,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118439103] [2021-06-05 18:11:19,812 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 18:11:20,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:11:20,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:20,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:11:20,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:20,416 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:11:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:20,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118439103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:20,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:20,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:11:20,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535845613] [2021-06-05 18:11:20,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:11:20,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:20,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:11:20,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:11:20,536 INFO L87 Difference]: Start difference. First operand 38375 states and 101275 transitions. Second operand has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:20,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:20,845 INFO L93 Difference]: Finished difference Result 52135 states and 136332 transitions. [2021-06-05 18:11:20,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:11:20,846 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 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 304 [2021-06-05 18:11:20,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:20,909 INFO L225 Difference]: With dead ends: 52135 [2021-06-05 18:11:20,909 INFO L226 Difference]: Without dead ends: 52135 [2021-06-05 18:11:20,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:11:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52135 states. [2021-06-05 18:11:21,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52135 to 40195. [2021-06-05 18:11:21,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40195 states, 40193 states have (on average 2.642151618441022) internal successors, (106196), 40194 states have internal predecessors, (106196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40195 states to 40195 states and 106196 transitions. [2021-06-05 18:11:21,595 INFO L78 Accepts]: Start accepts. Automaton has 40195 states and 106196 transitions. Word has length 304 [2021-06-05 18:11:21,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:21,596 INFO L482 AbstractCegarLoop]: Abstraction has 40195 states and 106196 transitions. [2021-06-05 18:11:21,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 40195 states and 106196 transitions. [2021-06-05 18:11:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-06-05 18:11:21,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:21,633 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:11:21,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 18:11:21,840 INFO L430 AbstractCegarLoop]: === Iteration 30 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:21,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:21,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1727253663, now seen corresponding path program 13 times [2021-06-05 18:11:21,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:21,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316048062] [2021-06-05 18:11:21,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:21,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:21,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316048062] [2021-06-05 18:11:21,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316048062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:21,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081813766] [2021-06-05 18:11:21,974 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 18:11:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:22,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:11:22,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:22,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081813766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:22,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:22,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:11:22,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469367448] [2021-06-05 18:11:22,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:11:22,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:22,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:11:22,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:11:22,485 INFO L87 Difference]: Start difference. First operand 40195 states and 106196 transitions. Second operand has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:22,766 INFO L93 Difference]: Finished difference Result 52985 states and 139007 transitions. [2021-06-05 18:11:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:11:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 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 304 [2021-06-05 18:11:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:22,827 INFO L225 Difference]: With dead ends: 52985 [2021-06-05 18:11:22,827 INFO L226 Difference]: Without dead ends: 52985 [2021-06-05 18:11:22,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:11:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52985 states. [2021-06-05 18:11:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52985 to 43095. [2021-06-05 18:11:23,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43095 states, 43093 states have (on average 2.6470888543382918) internal successors, (114071), 43094 states have internal predecessors, (114071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43095 states to 43095 states and 114071 transitions. [2021-06-05 18:11:23,520 INFO L78 Accepts]: Start accepts. Automaton has 43095 states and 114071 transitions. Word has length 304 [2021-06-05 18:11:23,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:23,520 INFO L482 AbstractCegarLoop]: Abstraction has 43095 states and 114071 transitions. [2021-06-05 18:11:23,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:23,520 INFO L276 IsEmpty]: Start isEmpty. Operand 43095 states and 114071 transitions. [2021-06-05 18:11:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-06-05 18:11:23,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:23,563 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, 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 18:11:23,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:23,763 INFO L430 AbstractCegarLoop]: === Iteration 31 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:23,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1931542652, now seen corresponding path program 8 times [2021-06-05 18:11:23,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:23,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888345932] [2021-06-05 18:11:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:24,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:24,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888345932] [2021-06-05 18:11:24,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888345932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:24,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436821928] [2021-06-05 18:11:24,075 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 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 18:11:24,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:11:24,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:24,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:24,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:24,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436821928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:24,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:24,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:11:24,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786734054] [2021-06-05 18:11:24,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:11:24,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:24,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:11:24,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:11:24,610 INFO L87 Difference]: Start difference. First operand 43095 states and 114071 transitions. Second operand has 21 states, 21 states have (on average 18.142857142857142) internal successors, (381), 21 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:25,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:25,010 INFO L93 Difference]: Finished difference Result 52842 states and 139004 transitions. [2021-06-05 18:11:25,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:11:25,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 18.142857142857142) internal successors, (381), 21 states have internal predecessors, (381), 0 states have call successors, (0), 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 334 [2021-06-05 18:11:25,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:25,082 INFO L225 Difference]: With dead ends: 52842 [2021-06-05 18:11:25,083 INFO L226 Difference]: Without dead ends: 52842 [2021-06-05 18:11:25,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 263.6ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:11:25,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52842 states. [2021-06-05 18:11:25,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52842 to 46410. [2021-06-05 18:11:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46410 states, 46408 states have (on average 2.6456429925874847) internal successors, (122779), 46409 states have internal predecessors, (122779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46410 states to 46410 states and 122779 transitions. [2021-06-05 18:11:25,920 INFO L78 Accepts]: Start accepts. Automaton has 46410 states and 122779 transitions. Word has length 334 [2021-06-05 18:11:25,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:25,921 INFO L482 AbstractCegarLoop]: Abstraction has 46410 states and 122779 transitions. [2021-06-05 18:11:25,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 18.142857142857142) internal successors, (381), 21 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 46410 states and 122779 transitions. [2021-06-05 18:11:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-06-05 18:11:25,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:25,968 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, 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, 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 18:11:26,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 18:11:26,181 INFO L430 AbstractCegarLoop]: === Iteration 32 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:26,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:26,181 INFO L82 PathProgramCache]: Analyzing trace with hash -618556360, now seen corresponding path program 7 times [2021-06-05 18:11:26,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:26,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973746442] [2021-06-05 18:11:26,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 599 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:11:26,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:26,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973746442] [2021-06-05 18:11:26,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973746442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:26,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440120764] [2021-06-05 18:11:26,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:26,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:26,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 575 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-06-05 18:11:26,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440120764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:26,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:26,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 18:11:26,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493520291] [2021-06-05 18:11:26,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:11:26,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:26,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:11:26,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:11:26,836 INFO L87 Difference]: Start difference. First operand 46410 states and 122779 transitions. Second operand has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:27,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:27,271 INFO L93 Difference]: Finished difference Result 61050 states and 159740 transitions. [2021-06-05 18:11:27,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:11:27,271 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 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 338 [2021-06-05 18:11:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:27,341 INFO L225 Difference]: With dead ends: 61050 [2021-06-05 18:11:27,341 INFO L226 Difference]: Without dead ends: 61050 [2021-06-05 18:11:27,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:11:27,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61050 states. [2021-06-05 18:11:27,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61050 to 43510. [2021-06-05 18:11:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43510 states, 43508 states have (on average 2.640985565872943) internal successors, (114904), 43509 states have internal predecessors, (114904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:28,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43510 states to 43510 states and 114904 transitions. [2021-06-05 18:11:28,111 INFO L78 Accepts]: Start accepts. Automaton has 43510 states and 114904 transitions. Word has length 338 [2021-06-05 18:11:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:28,112 INFO L482 AbstractCegarLoop]: Abstraction has 43510 states and 114904 transitions. [2021-06-05 18:11:28,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:28,112 INFO L276 IsEmpty]: Start isEmpty. Operand 43510 states and 114904 transitions. [2021-06-05 18:11:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-06-05 18:11:28,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:28,159 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, 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, 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 18:11:28,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:28,367 INFO L430 AbstractCegarLoop]: === Iteration 33 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:28,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:28,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1463868018, now seen corresponding path program 8 times [2021-06-05 18:11:28,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:28,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538278660] [2021-06-05 18:11:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 599 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:11:28,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:28,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538278660] [2021-06-05 18:11:28,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538278660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:28,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396867039] [2021-06-05 18:11:28,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:28,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:11:28,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:28,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:28,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 575 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-06-05 18:11:29,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396867039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:29,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:29,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 18:11:29,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644637425] [2021-06-05 18:11:29,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:11:29,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:29,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:11:29,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:11:29,007 INFO L87 Difference]: Start difference. First operand 43510 states and 114904 transitions. Second operand has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:29,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:29,520 INFO L93 Difference]: Finished difference Result 58330 states and 152858 transitions. [2021-06-05 18:11:29,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:11:29,521 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 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 338 [2021-06-05 18:11:29,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:29,592 INFO L225 Difference]: With dead ends: 58330 [2021-06-05 18:11:29,592 INFO L226 Difference]: Without dead ends: 58330 [2021-06-05 18:11:29,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:11:29,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58330 states. [2021-06-05 18:11:30,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58330 to 43510. [2021-06-05 18:11:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43510 states, 43508 states have (on average 2.640985565872943) internal successors, (114904), 43509 states have internal predecessors, (114904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43510 states to 43510 states and 114904 transitions. [2021-06-05 18:11:30,297 INFO L78 Accepts]: Start accepts. Automaton has 43510 states and 114904 transitions. Word has length 338 [2021-06-05 18:11:30,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:30,298 INFO L482 AbstractCegarLoop]: Abstraction has 43510 states and 114904 transitions. [2021-06-05 18:11:30,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:30,298 INFO L276 IsEmpty]: Start isEmpty. Operand 43510 states and 114904 transitions. [2021-06-05 18:11:30,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-06-05 18:11:30,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:30,340 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, 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, 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 18:11:30,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 18:11:30,540 INFO L430 AbstractCegarLoop]: === Iteration 34 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:30,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:30,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1520358408, now seen corresponding path program 9 times [2021-06-05 18:11:30,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:30,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333757888] [2021-06-05 18:11:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 599 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:11:30,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:30,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333757888] [2021-06-05 18:11:30,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333757888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:30,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426445792] [2021-06-05 18:11:30,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:30,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:11:30,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:30,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:30,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 575 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-06-05 18:11:31,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426445792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:31,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:31,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 18:11:31,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410911491] [2021-06-05 18:11:31,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:11:31,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:31,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:11:31,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:11:31,390 INFO L87 Difference]: Start difference. First operand 43510 states and 114904 transitions. Second operand has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:31,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:31,700 INFO L93 Difference]: Finished difference Result 63500 states and 166757 transitions. [2021-06-05 18:11:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:11:31,701 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 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 338 [2021-06-05 18:11:31,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:31,776 INFO L225 Difference]: With dead ends: 63500 [2021-06-05 18:11:31,776 INFO L226 Difference]: Without dead ends: 63500 [2021-06-05 18:11:31,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:11:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63500 states. [2021-06-05 18:11:32,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63500 to 46410. [2021-06-05 18:11:32,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46410 states, 46408 states have (on average 2.6456429925874847) internal successors, (122779), 46409 states have internal predecessors, (122779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:32,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46410 states to 46410 states and 122779 transitions. [2021-06-05 18:11:32,601 INFO L78 Accepts]: Start accepts. Automaton has 46410 states and 122779 transitions. Word has length 338 [2021-06-05 18:11:32,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:32,601 INFO L482 AbstractCegarLoop]: Abstraction has 46410 states and 122779 transitions. [2021-06-05 18:11:32,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.6) internal successors, (324), 15 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:32,601 INFO L276 IsEmpty]: Start isEmpty. Operand 46410 states and 122779 transitions. [2021-06-05 18:11:32,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-06-05 18:11:32,650 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:32,650 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, 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, 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 18:11:32,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:32,850 INFO L430 AbstractCegarLoop]: === Iteration 35 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:32,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:32,851 INFO L82 PathProgramCache]: Analyzing trace with hash 621312764, now seen corresponding path program 10 times [2021-06-05 18:11:32,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:32,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639817687] [2021-06-05 18:11:32,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:11:32,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:32,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639817687] [2021-06-05 18:11:32,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639817687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:32,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239867164] [2021-06-05 18:11:32,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:33,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:11:33,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:33,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:33,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:33,562 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:11:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:11:33,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239867164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:33,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:33,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:11:33,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992267117] [2021-06-05 18:11:33,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:11:33,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:33,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:11:33,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:11:33,786 INFO L87 Difference]: Start difference. First operand 46410 states and 122779 transitions. Second operand has 15 states, 15 states have (on average 21.666666666666668) internal successors, (325), 15 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:34,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:34,090 INFO L93 Difference]: Finished difference Result 65275 states and 170986 transitions. [2021-06-05 18:11:34,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:11:34,090 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.666666666666668) internal successors, (325), 15 states have internal predecessors, (325), 0 states have call successors, (0), 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 338 [2021-06-05 18:11:34,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:34,170 INFO L225 Difference]: With dead ends: 65275 [2021-06-05 18:11:34,170 INFO L226 Difference]: Without dead ends: 65275 [2021-06-05 18:11:34,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:11:34,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65275 states. [2021-06-05 18:11:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65275 to 49570. [2021-06-05 18:11:34,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49570 states, 49568 states have (on average 2.649229341510652) internal successors, (131317), 49569 states have internal predecessors, (131317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49570 states to 49570 states and 131317 transitions. [2021-06-05 18:11:35,032 INFO L78 Accepts]: Start accepts. Automaton has 49570 states and 131317 transitions. Word has length 338 [2021-06-05 18:11:35,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:35,032 INFO L482 AbstractCegarLoop]: Abstraction has 49570 states and 131317 transitions. [2021-06-05 18:11:35,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.666666666666668) internal successors, (325), 15 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 49570 states and 131317 transitions. [2021-06-05 18:11:35,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-06-05 18:11:35,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:35,080 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, 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, 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 18:11:35,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 18:11:35,280 INFO L430 AbstractCegarLoop]: === Iteration 36 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:35,281 INFO L82 PathProgramCache]: Analyzing trace with hash 564822374, now seen corresponding path program 11 times [2021-06-05 18:11:35,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:35,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373341172] [2021-06-05 18:11:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:11:35,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:35,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373341172] [2021-06-05 18:11:35,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373341172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:35,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615899365] [2021-06-05 18:11:35,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:35,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:11:35,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:35,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:35,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:11:36,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615899365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:36,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:36,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:11:36,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736840800] [2021-06-05 18:11:36,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:11:36,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:36,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:11:36,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:11:36,066 INFO L87 Difference]: Start difference. First operand 49570 states and 131317 transitions. Second operand has 15 states, 15 states have (on average 21.666666666666668) internal successors, (325), 15 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:36,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:36,451 INFO L93 Difference]: Finished difference Result 77225 states and 203730 transitions. [2021-06-05 18:11:36,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:11:36,451 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.666666666666668) internal successors, (325), 15 states have internal predecessors, (325), 0 states have call successors, (0), 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 338 [2021-06-05 18:11:36,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:36,546 INFO L225 Difference]: With dead ends: 77225 [2021-06-05 18:11:36,546 INFO L226 Difference]: Without dead ends: 77225 [2021-06-05 18:11:36,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:11:36,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77225 states. [2021-06-05 18:11:37,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77225 to 52470. [2021-06-05 18:11:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52470 states, 52468 states have (on average 2.652893192040863) internal successors, (139192), 52469 states have internal predecessors, (139192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:37,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52470 states to 52470 states and 139192 transitions. [2021-06-05 18:11:37,693 INFO L78 Accepts]: Start accepts. Automaton has 52470 states and 139192 transitions. Word has length 338 [2021-06-05 18:11:37,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:37,693 INFO L482 AbstractCegarLoop]: Abstraction has 52470 states and 139192 transitions. [2021-06-05 18:11:37,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.666666666666668) internal successors, (325), 15 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:37,693 INFO L276 IsEmpty]: Start isEmpty. Operand 52470 states and 139192 transitions. [2021-06-05 18:11:37,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-06-05 18:11:37,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:37,886 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:11:38,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 18:11:38,087 INFO L430 AbstractCegarLoop]: === Iteration 37 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:38,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:38,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1679932579, now seen corresponding path program 14 times [2021-06-05 18:11:38,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:38,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115825498] [2021-06-05 18:11:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 828 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 18:11:38,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:38,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115825498] [2021-06-05 18:11:38,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115825498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:38,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589684710] [2021-06-05 18:11:38,311 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 18:11:38,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:11:38,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:38,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:38,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:38,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589684710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:38,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:38,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:11:38,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071261960] [2021-06-05 18:11:38,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:11:38,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:38,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:11:38,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:11:38,790 INFO L87 Difference]: Start difference. First operand 52470 states and 139192 transitions. Second operand has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:39,159 INFO L93 Difference]: Finished difference Result 62400 states and 164204 transitions. [2021-06-05 18:11:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:11:39,160 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 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 339 [2021-06-05 18:11:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:39,240 INFO L225 Difference]: With dead ends: 62400 [2021-06-05 18:11:39,240 INFO L226 Difference]: Without dead ends: 62400 [2021-06-05 18:11:39,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:11:39,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62400 states. [2021-06-05 18:11:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62400 to 53550. [2021-06-05 18:11:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53550 states, 53548 states have (on average 2.6545529244789723) internal successors, (142146), 53549 states have internal predecessors, (142146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53550 states to 53550 states and 142146 transitions. [2021-06-05 18:11:40,284 INFO L78 Accepts]: Start accepts. Automaton has 53550 states and 142146 transitions. Word has length 339 [2021-06-05 18:11:40,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:40,284 INFO L482 AbstractCegarLoop]: Abstraction has 53550 states and 142146 transitions. [2021-06-05 18:11:40,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:40,284 INFO L276 IsEmpty]: Start isEmpty. Operand 53550 states and 142146 transitions. [2021-06-05 18:11:40,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-06-05 18:11:40,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:40,347 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:11:40,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 18:11:40,547 INFO L430 AbstractCegarLoop]: === Iteration 38 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:40,548 INFO L82 PathProgramCache]: Analyzing trace with hash -997762361, now seen corresponding path program 15 times [2021-06-05 18:11:40,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:40,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688526584] [2021-06-05 18:11:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:40,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:40,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688526584] [2021-06-05 18:11:40,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688526584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:40,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168804910] [2021-06-05 18:11:40,676 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 18:11:41,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:11:41,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:41,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:41,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:41,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168804910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:41,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:41,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:11:41,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684344814] [2021-06-05 18:11:41,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:11:41,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:41,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:11:41,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:11:41,381 INFO L87 Difference]: Start difference. First operand 53550 states and 142146 transitions. Second operand has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:41,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:41,739 INFO L93 Difference]: Finished difference Result 66585 states and 174621 transitions. [2021-06-05 18:11:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:11:41,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 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 339 [2021-06-05 18:11:41,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:41,821 INFO L225 Difference]: With dead ends: 66585 [2021-06-05 18:11:41,821 INFO L226 Difference]: Without dead ends: 66585 [2021-06-05 18:11:41,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=283, Invalid=709, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:11:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66585 states. [2021-06-05 18:11:42,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66585 to 52470. [2021-06-05 18:11:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52470 states, 52468 states have (on average 2.652893192040863) internal successors, (139192), 52469 states have internal predecessors, (139192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52470 states to 52470 states and 139192 transitions. [2021-06-05 18:11:43,020 INFO L78 Accepts]: Start accepts. Automaton has 52470 states and 139192 transitions. Word has length 339 [2021-06-05 18:11:43,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:43,020 INFO L482 AbstractCegarLoop]: Abstraction has 52470 states and 139192 transitions. [2021-06-05 18:11:43,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:43,020 INFO L276 IsEmpty]: Start isEmpty. Operand 52470 states and 139192 transitions. [2021-06-05 18:11:43,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-06-05 18:11:43,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:43,081 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:11:43,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 18:11:43,282 INFO L430 AbstractCegarLoop]: === Iteration 39 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:43,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:43,283 INFO L82 PathProgramCache]: Analyzing trace with hash -778411107, now seen corresponding path program 16 times [2021-06-05 18:11:43,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:43,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086701831] [2021-06-05 18:11:43,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:43,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:43,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086701831] [2021-06-05 18:11:43,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086701831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:43,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49886158] [2021-06-05 18:11:43,405 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 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 18:11:43,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:11:43,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:43,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:43,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:44,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49886158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:44,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:44,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:11:44,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791778707] [2021-06-05 18:11:44,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:11:44,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:44,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:11:44,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:11:44,075 INFO L87 Difference]: Start difference. First operand 52470 states and 139192 transitions. Second operand has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:44,436 INFO L93 Difference]: Finished difference Result 68675 states and 180658 transitions. [2021-06-05 18:11:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:11:44,437 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 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 339 [2021-06-05 18:11:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:44,522 INFO L225 Difference]: With dead ends: 68675 [2021-06-05 18:11:44,522 INFO L226 Difference]: Without dead ends: 68675 [2021-06-05 18:11:44,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=292, Invalid=764, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:11:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68675 states. [2021-06-05 18:11:45,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68675 to 55370. [2021-06-05 18:11:45,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55370 states, 55368 states have (on average 2.6561732408611474) internal successors, (147067), 55369 states have internal predecessors, (147067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55370 states to 55370 states and 147067 transitions. [2021-06-05 18:11:45,637 INFO L78 Accepts]: Start accepts. Automaton has 55370 states and 147067 transitions. Word has length 339 [2021-06-05 18:11:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:45,637 INFO L482 AbstractCegarLoop]: Abstraction has 55370 states and 147067 transitions. [2021-06-05 18:11:45,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:45,637 INFO L276 IsEmpty]: Start isEmpty. Operand 55370 states and 147067 transitions. [2021-06-05 18:11:45,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-06-05 18:11:45,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:45,701 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:11:45,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 18:11:45,902 INFO L430 AbstractCegarLoop]: === Iteration 40 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:45,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:45,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1393042055, now seen corresponding path program 17 times [2021-06-05 18:11:45,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:45,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340100572] [2021-06-05 18:11:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:46,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:46,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340100572] [2021-06-05 18:11:46,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340100572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:46,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479831346] [2021-06-05 18:11:46,035 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 18:11:46,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:11:46,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:46,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:46,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:46,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479831346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:46,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:46,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:11:46,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20480123] [2021-06-05 18:11:46,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:11:46,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:46,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:11:46,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:11:46,724 INFO L87 Difference]: Start difference. First operand 55370 states and 147067 transitions. Second operand has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:47,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:47,263 INFO L93 Difference]: Finished difference Result 71265 states and 187341 transitions. [2021-06-05 18:11:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:11:47,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 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 339 [2021-06-05 18:11:47,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:47,342 INFO L225 Difference]: With dead ends: 71265 [2021-06-05 18:11:47,342 INFO L226 Difference]: Without dead ends: 71265 [2021-06-05 18:11:47,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:11:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71265 states. [2021-06-05 18:11:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71265 to 58270. [2021-06-05 18:11:48,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58270 states, 58268 states have (on average 2.659126793437221) internal successors, (154942), 58269 states have internal predecessors, (154942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:48,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58270 states to 58270 states and 154942 transitions. [2021-06-05 18:11:48,488 INFO L78 Accepts]: Start accepts. Automaton has 58270 states and 154942 transitions. Word has length 339 [2021-06-05 18:11:48,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:48,489 INFO L482 AbstractCegarLoop]: Abstraction has 58270 states and 154942 transitions. [2021-06-05 18:11:48,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:48,489 INFO L276 IsEmpty]: Start isEmpty. Operand 58270 states and 154942 transitions. [2021-06-05 18:11:48,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-06-05 18:11:48,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:48,559 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:11:48,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 18:11:48,760 INFO L430 AbstractCegarLoop]: === Iteration 41 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:48,760 INFO L82 PathProgramCache]: Analyzing trace with hash 547730397, now seen corresponding path program 18 times [2021-06-05 18:11:48,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:48,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967275962] [2021-06-05 18:11:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:48,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:48,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967275962] [2021-06-05 18:11:48,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967275962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:48,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728684237] [2021-06-05 18:11:48,900 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 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 18:11:49,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:11:49,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:49,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:49,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:49,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728684237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:49,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:49,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:11:49,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796030184] [2021-06-05 18:11:49,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:11:49,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:49,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:11:49,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:11:49,581 INFO L87 Difference]: Start difference. First operand 58270 states and 154942 transitions. Second operand has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:50,151 INFO L93 Difference]: Finished difference Result 75645 states and 198750 transitions. [2021-06-05 18:11:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:11:50,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 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 339 [2021-06-05 18:11:50,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:50,231 INFO L225 Difference]: With dead ends: 75645 [2021-06-05 18:11:50,231 INFO L226 Difference]: Without dead ends: 75645 [2021-06-05 18:11:50,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=310, Invalid=880, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:11:50,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75645 states. [2021-06-05 18:11:51,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75645 to 60090. [2021-06-05 18:11:51,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60090 states, 60088 states have (on average 2.660481294101984) internal successors, (159863), 60089 states have internal predecessors, (159863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60090 states to 60090 states and 159863 transitions. [2021-06-05 18:11:51,253 INFO L78 Accepts]: Start accepts. Automaton has 60090 states and 159863 transitions. Word has length 339 [2021-06-05 18:11:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:51,254 INFO L482 AbstractCegarLoop]: Abstraction has 60090 states and 159863 transitions. [2021-06-05 18:11:51,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand 60090 states and 159863 transitions. [2021-06-05 18:11:51,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-06-05 18:11:51,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:51,327 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:11:51,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 18:11:51,528 INFO L430 AbstractCegarLoop]: === Iteration 42 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:51,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:51,528 INFO L82 PathProgramCache]: Analyzing trace with hash 491240007, now seen corresponding path program 19 times [2021-06-05 18:11:51,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:51,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678289731] [2021-06-05 18:11:51,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:51,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:51,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678289731] [2021-06-05 18:11:51,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678289731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:51,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046528044] [2021-06-05 18:11:51,654 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 18:11:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:51,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:11:51,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:11:52,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046528044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:52,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:52,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:11:52,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075558545] [2021-06-05 18:11:52,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:11:52,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:52,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:11:52,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:11:52,121 INFO L87 Difference]: Start difference. First operand 60090 states and 159863 transitions. Second operand has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:52,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:52,693 INFO L93 Difference]: Finished difference Result 75685 states and 199547 transitions. [2021-06-05 18:11:52,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:11:52,694 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 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 339 [2021-06-05 18:11:52,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:52,784 INFO L225 Difference]: With dead ends: 75685 [2021-06-05 18:11:52,784 INFO L226 Difference]: Without dead ends: 75685 [2021-06-05 18:11:52,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=319, Invalid=941, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:11:52,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75685 states. [2021-06-05 18:11:53,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75685 to 59010. [2021-06-05 18:11:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59010 states, 59008 states have (on average 2.659114018438178) internal successors, (156909), 59009 states have internal predecessors, (156909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:53,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59010 states to 59010 states and 156909 transitions. [2021-06-05 18:11:53,910 INFO L78 Accepts]: Start accepts. Automaton has 59010 states and 156909 transitions. Word has length 339 [2021-06-05 18:11:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:53,911 INFO L482 AbstractCegarLoop]: Abstraction has 59010 states and 156909 transitions. [2021-06-05 18:11:53,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.055555555555557) internal successors, (361), 18 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 59010 states and 156909 transitions. [2021-06-05 18:11:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-06-05 18:11:53,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:53,984 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, 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 18:11:54,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:54,185 INFO L430 AbstractCegarLoop]: === Iteration 43 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:54,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash 555481760, now seen corresponding path program 9 times [2021-06-05 18:11:54,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:54,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319143096] [2021-06-05 18:11:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:54,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:54,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319143096] [2021-06-05 18:11:54,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319143096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:54,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801016243] [2021-06-05 18:11:54,428 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 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 18:11:54,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:11:54,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:54,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:11:54,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:11:55,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801016243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:55,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:55,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:11:55,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629600295] [2021-06-05 18:11:55,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:11:55,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:55,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:11:55,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:11:55,221 INFO L87 Difference]: Start difference. First operand 59010 states and 156909 transitions. Second operand has 23 states, 23 states have (on average 18.08695652173913) internal successors, (416), 23 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:55,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:55,839 INFO L93 Difference]: Finished difference Result 69362 states and 183271 transitions. [2021-06-05 18:11:55,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:11:55,840 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 18.08695652173913) internal successors, (416), 23 states have internal predecessors, (416), 0 states have call successors, (0), 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 369 [2021-06-05 18:11:55,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:55,920 INFO L225 Difference]: With dead ends: 69362 [2021-06-05 18:11:55,921 INFO L226 Difference]: Without dead ends: 69362 [2021-06-05 18:11:55,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:11:56,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69362 states. [2021-06-05 18:11:56,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69362 to 62325. [2021-06-05 18:11:56,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62325 states, 62323 states have (on average 2.6573977504292157) internal successors, (165617), 62324 states have internal predecessors, (165617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62325 states to 62325 states and 165617 transitions. [2021-06-05 18:11:56,927 INFO L78 Accepts]: Start accepts. Automaton has 62325 states and 165617 transitions. Word has length 369 [2021-06-05 18:11:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:11:56,927 INFO L482 AbstractCegarLoop]: Abstraction has 62325 states and 165617 transitions. [2021-06-05 18:11:56,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 18.08695652173913) internal successors, (416), 23 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:56,928 INFO L276 IsEmpty]: Start isEmpty. Operand 62325 states and 165617 transitions. [2021-06-05 18:11:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-06-05 18:11:57,001 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:11:57,001 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, 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, 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 18:11:57,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:11:57,202 INFO L430 AbstractCegarLoop]: === Iteration 44 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:11:57,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:11:57,202 INFO L82 PathProgramCache]: Analyzing trace with hash -123126767, now seen corresponding path program 12 times [2021-06-05 18:11:57,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:11:57,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195673733] [2021-06-05 18:11:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:11:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:11:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 18 proven. 629 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:11:57,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:11:57,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195673733] [2021-06-05 18:11:57,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195673733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:57,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130638485] [2021-06-05 18:11:57,314 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 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 18:11:57,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:11:57,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:11:57,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:11:57,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:11:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 18 proven. 605 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-06-05 18:11:57,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130638485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:11:57,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:11:57,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 18:11:57,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582551264] [2021-06-05 18:11:57,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:11:57,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:11:57,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:11:57,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:11:57,882 INFO L87 Difference]: Start difference. First operand 62325 states and 165617 transitions. Second operand has 14 states, 14 states have (on average 23.071428571428573) internal successors, (323), 14 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:11:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:11:58,475 INFO L93 Difference]: Finished difference Result 104975 states and 276574 transitions. [2021-06-05 18:11:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:11:58,475 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 23.071428571428573) internal successors, (323), 14 states have internal predecessors, (323), 0 states have call successors, (0), 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 372 [2021-06-05 18:11:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:11:58,616 INFO L225 Difference]: With dead ends: 104975 [2021-06-05 18:11:58,617 INFO L226 Difference]: Without dead ends: 104975 [2021-06-05 18:11:58,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:11:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104975 states. [2021-06-05 18:11:59,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104975 to 71885. [2021-06-05 18:11:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71885 states, 71883 states have (on average 2.664816437822573) internal successors, (191555), 71884 states have internal predecessors, (191555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:00,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71885 states to 71885 states and 191555 transitions. [2021-06-05 18:12:00,044 INFO L78 Accepts]: Start accepts. Automaton has 71885 states and 191555 transitions. Word has length 372 [2021-06-05 18:12:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:00,045 INFO L482 AbstractCegarLoop]: Abstraction has 71885 states and 191555 transitions. [2021-06-05 18:12:00,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 23.071428571428573) internal successors, (323), 14 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 71885 states and 191555 transitions. [2021-06-05 18:12:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:12:00,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:00,129 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, 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, 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 18:12:00,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:00,329 INFO L430 AbstractCegarLoop]: === Iteration 45 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:00,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:00,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1692921188, now seen corresponding path program 13 times [2021-06-05 18:12:00,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:00,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622847939] [2021-06-05 18:12:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:12:00,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:00,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622847939] [2021-06-05 18:12:00,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622847939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:00,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991248624] [2021-06-05 18:12:00,725 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 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 18:12:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:00,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:00,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-06-05 18:12:01,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991248624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:01,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:01,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:12:01,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496045060] [2021-06-05 18:12:01,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:01,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:01,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:01,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:01,237 INFO L87 Difference]: Start difference. First operand 71885 states and 191555 transitions. Second operand has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:01,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:01,651 INFO L93 Difference]: Finished difference Result 89825 states and 236702 transitions. [2021-06-05 18:12:01,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:12:01,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 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 373 [2021-06-05 18:12:01,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:01,756 INFO L225 Difference]: With dead ends: 89825 [2021-06-05 18:12:01,756 INFO L226 Difference]: Without dead ends: 89825 [2021-06-05 18:12:01,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:12:01,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89825 states. [2021-06-05 18:12:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89825 to 68985. [2021-06-05 18:12:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68985 states, 68983 states have (on average 2.6626850093501298) internal successors, (183680), 68984 states have internal predecessors, (183680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68985 states to 68985 states and 183680 transitions. [2021-06-05 18:12:03,178 INFO L78 Accepts]: Start accepts. Automaton has 68985 states and 183680 transitions. Word has length 373 [2021-06-05 18:12:03,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:03,178 INFO L482 AbstractCegarLoop]: Abstraction has 68985 states and 183680 transitions. [2021-06-05 18:12:03,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 68985 states and 183680 transitions. [2021-06-05 18:12:03,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:12:03,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:03,266 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, 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, 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 18:12:03,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 18:12:03,468 INFO L430 AbstractCegarLoop]: === Iteration 46 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:03,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:03,468 INFO L82 PathProgramCache]: Analyzing trace with hash -430592946, now seen corresponding path program 14 times [2021-06-05 18:12:03,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:03,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082430133] [2021-06-05 18:12:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:12:03,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:03,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082430133] [2021-06-05 18:12:03,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082430133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:03,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166944485] [2021-06-05 18:12:03,618 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 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 18:12:03,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:12:03,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:03,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:03,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-06-05 18:12:04,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166944485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:04,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:04,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:12:04,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698733520] [2021-06-05 18:12:04,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:04,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:04,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:04,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:04,205 INFO L87 Difference]: Start difference. First operand 68985 states and 183680 transitions. Second operand has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:04,683 INFO L93 Difference]: Finished difference Result 100010 states and 264114 transitions. [2021-06-05 18:12:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:12:04,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 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 373 [2021-06-05 18:12:04,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:04,821 INFO L225 Difference]: With dead ends: 100010 [2021-06-05 18:12:04,821 INFO L226 Difference]: Without dead ends: 100010 [2021-06-05 18:12:04,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:12:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100010 states. [2021-06-05 18:12:06,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100010 to 70805. [2021-06-05 18:12:06,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70805 states, 70803 states have (on average 2.6637430617346722) internal successors, (188601), 70804 states have internal predecessors, (188601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:06,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70805 states to 70805 states and 188601 transitions. [2021-06-05 18:12:06,246 INFO L78 Accepts]: Start accepts. Automaton has 70805 states and 188601 transitions. Word has length 373 [2021-06-05 18:12:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:06,246 INFO L482 AbstractCegarLoop]: Abstraction has 70805 states and 188601 transitions. [2021-06-05 18:12:06,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 70805 states and 188601 transitions. [2021-06-05 18:12:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:12:06,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:06,327 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, 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, 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 18:12:06,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:06,528 INFO L430 AbstractCegarLoop]: === Iteration 47 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:06,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:06,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1275904604, now seen corresponding path program 15 times [2021-06-05 18:12:06,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:06,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665233268] [2021-06-05 18:12:06,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:12:06,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:06,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665233268] [2021-06-05 18:12:06,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665233268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:06,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586539529] [2021-06-05 18:12:06,659 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 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 18:12:06,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:12:06,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:06,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:06,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-06-05 18:12:07,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586539529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:07,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:07,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:12:07,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402790942] [2021-06-05 18:12:07,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:07,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:07,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:07,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:07,323 INFO L87 Difference]: Start difference. First operand 70805 states and 188601 transitions. Second operand has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:07,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:07,956 INFO L93 Difference]: Finished difference Result 97690 states and 258314 transitions. [2021-06-05 18:12:07,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:12:07,956 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 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 373 [2021-06-05 18:12:07,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:08,075 INFO L225 Difference]: With dead ends: 97690 [2021-06-05 18:12:08,075 INFO L226 Difference]: Without dead ends: 97690 [2021-06-05 18:12:08,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:12:08,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97690 states. [2021-06-05 18:12:09,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97690 to 73705. [2021-06-05 18:12:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73705 states, 73703 states have (on average 2.6657802260423593) internal successors, (196476), 73704 states have internal predecessors, (196476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73705 states to 73705 states and 196476 transitions. [2021-06-05 18:12:09,383 INFO L78 Accepts]: Start accepts. Automaton has 73705 states and 196476 transitions. Word has length 373 [2021-06-05 18:12:09,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:09,383 INFO L482 AbstractCegarLoop]: Abstraction has 73705 states and 196476 transitions. [2021-06-05 18:12:09,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 73705 states and 196476 transitions. [2021-06-05 18:12:09,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:12:09,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:09,478 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, 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, 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 18:12:09,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:09,679 INFO L430 AbstractCegarLoop]: === Iteration 48 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:09,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1332394994, now seen corresponding path program 16 times [2021-06-05 18:12:09,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:09,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767224697] [2021-06-05 18:12:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:12:09,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:09,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767224697] [2021-06-05 18:12:09,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767224697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:09,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742385422] [2021-06-05 18:12:09,821 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 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 18:12:10,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:12:10,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:10,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:10,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-06-05 18:12:10,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742385422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:10,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:10,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:12:10,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788928571] [2021-06-05 18:12:10,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:10,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:10,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:10,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:10,530 INFO L87 Difference]: Start difference. First operand 73705 states and 196476 transitions. Second operand has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:11,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:11,195 INFO L93 Difference]: Finished difference Result 98365 states and 260554 transitions. [2021-06-05 18:12:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:12:11,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 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 373 [2021-06-05 18:12:11,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:11,329 INFO L225 Difference]: With dead ends: 98365 [2021-06-05 18:12:11,329 INFO L226 Difference]: Without dead ends: 98365 [2021-06-05 18:12:11,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:12:11,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98365 states. [2021-06-05 18:12:12,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98365 to 74785. [2021-06-05 18:12:12,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74785 states, 74783 states have (on average 2.666782557533129) internal successors, (199430), 74784 states have internal predecessors, (199430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74785 states to 74785 states and 199430 transitions. [2021-06-05 18:12:12,697 INFO L78 Accepts]: Start accepts. Automaton has 74785 states and 199430 transitions. Word has length 373 [2021-06-05 18:12:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:12,698 INFO L482 AbstractCegarLoop]: Abstraction has 74785 states and 199430 transitions. [2021-06-05 18:12:12,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.11764705882353) internal successors, (359), 17 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 74785 states and 199430 transitions. [2021-06-05 18:12:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:12:12,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:12,784 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, 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, 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 18:12:12,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 18:12:12,992 INFO L430 AbstractCegarLoop]: === Iteration 49 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:12,992 INFO L82 PathProgramCache]: Analyzing trace with hash -296849376, now seen corresponding path program 17 times [2021-06-05 18:12:12,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:12,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207519960] [2021-06-05 18:12:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:13,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:13,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207519960] [2021-06-05 18:12:13,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207519960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:13,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512278113] [2021-06-05 18:12:13,109 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 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 18:12:13,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:12:13,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:13,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:13,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:13,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512278113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:13,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:13,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:12:13,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675486305] [2021-06-05 18:12:13,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:13,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:13,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:13,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:13,914 INFO L87 Difference]: Start difference. First operand 74785 states and 199430 transitions. Second operand has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:14,316 INFO L93 Difference]: Finished difference Result 97570 states and 257498 transitions. [2021-06-05 18:12:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:12:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 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 373 [2021-06-05 18:12:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:14,437 INFO L225 Difference]: With dead ends: 97570 [2021-06-05 18:12:14,438 INFO L226 Difference]: Without dead ends: 97570 [2021-06-05 18:12:14,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:12:14,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97570 states. [2021-06-05 18:12:15,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97570 to 72145. [2021-06-05 18:12:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72145 states, 72143 states have (on average 2.664402644747238) internal successors, (192218), 72144 states have internal predecessors, (192218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72145 states to 72145 states and 192218 transitions. [2021-06-05 18:12:15,782 INFO L78 Accepts]: Start accepts. Automaton has 72145 states and 192218 transitions. Word has length 373 [2021-06-05 18:12:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:15,783 INFO L482 AbstractCegarLoop]: Abstraction has 72145 states and 192218 transitions. [2021-06-05 18:12:15,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand 72145 states and 192218 transitions. [2021-06-05 18:12:15,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:12:15,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:15,867 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, 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, 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 18:12:16,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 18:12:16,068 INFO L430 AbstractCegarLoop]: === Iteration 50 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:16,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:16,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1142161034, now seen corresponding path program 18 times [2021-06-05 18:12:16,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:16,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858655635] [2021-06-05 18:12:16,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:16,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:16,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858655635] [2021-06-05 18:12:16,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858655635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:16,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608942735] [2021-06-05 18:12:16,360 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 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 18:12:16,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:12:16,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:16,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:16,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:16,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608942735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:16,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:16,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:12:16,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615459417] [2021-06-05 18:12:16,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:16,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:16,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:16,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:16,979 INFO L87 Difference]: Start difference. First operand 72145 states and 192218 transitions. Second operand has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:17,437 INFO L93 Difference]: Finished difference Result 117055 states and 310115 transitions. [2021-06-05 18:12:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:12:17,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 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 373 [2021-06-05 18:12:17,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:17,594 INFO L225 Difference]: With dead ends: 117055 [2021-06-05 18:12:17,594 INFO L226 Difference]: Without dead ends: 117055 [2021-06-05 18:12:17,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:12:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117055 states. [2021-06-05 18:12:18,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117055 to 77945. [2021-06-05 18:12:18,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77945 states, 77943 states have (on average 2.668206253287659) internal successors, (207968), 77944 states have internal predecessors, (207968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77945 states to 77945 states and 207968 transitions. [2021-06-05 18:12:19,234 INFO L78 Accepts]: Start accepts. Automaton has 77945 states and 207968 transitions. Word has length 373 [2021-06-05 18:12:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:19,234 INFO L482 AbstractCegarLoop]: Abstraction has 77945 states and 207968 transitions. [2021-06-05 18:12:19,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:19,234 INFO L276 IsEmpty]: Start isEmpty. Operand 77945 states and 207968 transitions. [2021-06-05 18:12:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:12:19,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:19,325 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, 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, 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 18:12:19,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 18:12:19,526 INFO L430 AbstractCegarLoop]: === Iteration 51 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:19,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1198651424, now seen corresponding path program 19 times [2021-06-05 18:12:19,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:19,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908053512] [2021-06-05 18:12:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:19,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:19,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908053512] [2021-06-05 18:12:19,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908053512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:19,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172322607] [2021-06-05 18:12:19,644 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 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 18:12:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:19,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:19,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:20,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172322607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:20,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:20,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:12:20,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620165980] [2021-06-05 18:12:20,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:20,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:20,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:20,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:20,152 INFO L87 Difference]: Start difference. First operand 77945 states and 207968 transitions. Second operand has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:20,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:20,631 INFO L93 Difference]: Finished difference Result 112495 states and 298422 transitions. [2021-06-05 18:12:20,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:12:20,632 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 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 373 [2021-06-05 18:12:20,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:21,016 INFO L225 Difference]: With dead ends: 112495 [2021-06-05 18:12:21,016 INFO L226 Difference]: Without dead ends: 112495 [2021-06-05 18:12:21,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:12:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112495 states. [2021-06-05 18:12:22,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112495 to 76865. [2021-06-05 18:12:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76865 states, 76863 states have (on average 2.667265134069708) internal successors, (205014), 76864 states have internal predecessors, (205014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76865 states to 76865 states and 205014 transitions. [2021-06-05 18:12:22,417 INFO L78 Accepts]: Start accepts. Automaton has 76865 states and 205014 transitions. Word has length 373 [2021-06-05 18:12:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:22,418 INFO L482 AbstractCegarLoop]: Abstraction has 76865 states and 205014 transitions. [2021-06-05 18:12:22,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 76865 states and 205014 transitions. [2021-06-05 18:12:22,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:12:22,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:22,508 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, 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, 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 18:12:22,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:22,708 INFO L430 AbstractCegarLoop]: === Iteration 52 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:22,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:22,709 INFO L82 PathProgramCache]: Analyzing trace with hash 943019748, now seen corresponding path program 20 times [2021-06-05 18:12:22,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:22,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213394895] [2021-06-05 18:12:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:22,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:22,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213394895] [2021-06-05 18:12:22,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213394895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:22,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811194589] [2021-06-05 18:12:22,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:12:22,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:12:22,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:22,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:22,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:23,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811194589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:23,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:23,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:12:23,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170907747] [2021-06-05 18:12:23,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:23,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:23,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:23,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:23,320 INFO L87 Difference]: Start difference. First operand 76865 states and 205014 transitions. Second operand has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:23,968 INFO L93 Difference]: Finished difference Result 101390 states and 267801 transitions. [2021-06-05 18:12:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:12:23,969 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 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 373 [2021-06-05 18:12:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:24,107 INFO L225 Difference]: With dead ends: 101390 [2021-06-05 18:12:24,107 INFO L226 Difference]: Without dead ends: 101390 [2021-06-05 18:12:24,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:12:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101390 states. [2021-06-05 18:12:25,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101390 to 80025. [2021-06-05 18:12:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80025 states, 80023 states have (on average 2.6686327680791773) internal successors, (213552), 80024 states have internal predecessors, (213552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:25,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80025 states to 80025 states and 213552 transitions. [2021-06-05 18:12:25,439 INFO L78 Accepts]: Start accepts. Automaton has 80025 states and 213552 transitions. Word has length 373 [2021-06-05 18:12:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:25,439 INFO L482 AbstractCegarLoop]: Abstraction has 80025 states and 213552 transitions. [2021-06-05 18:12:25,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:25,440 INFO L276 IsEmpty]: Start isEmpty. Operand 80025 states and 213552 transitions. [2021-06-05 18:12:25,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-06-05 18:12:25,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:25,535 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, 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, 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 18:12:25,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:25,735 INFO L430 AbstractCegarLoop]: === Iteration 53 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:25,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:25,735 INFO L82 PathProgramCache]: Analyzing trace with hash 886529358, now seen corresponding path program 21 times [2021-06-05 18:12:25,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:25,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206388874] [2021-06-05 18:12:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:25,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:25,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206388874] [2021-06-05 18:12:25,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206388874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:25,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736405607] [2021-06-05 18:12:25,854 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 18:12:26,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:12:26,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:26,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:26,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:12:26,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736405607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:26,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:26,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:12:26,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723406041] [2021-06-05 18:12:26,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:12:26,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:26,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:12:26,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:12:26,456 INFO L87 Difference]: Start difference. First operand 80025 states and 213552 transitions. Second operand has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:27,225 INFO L93 Difference]: Finished difference Result 133890 states and 356075 transitions. [2021-06-05 18:12:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:12:27,225 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 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 373 [2021-06-05 18:12:27,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:27,405 INFO L225 Difference]: With dead ends: 133890 [2021-06-05 18:12:27,406 INFO L226 Difference]: Without dead ends: 133890 [2021-06-05 18:12:27,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 410.8ms TimeCoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:12:27,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133890 states. [2021-06-05 18:12:28,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133890 to 82925. [2021-06-05 18:12:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82925 states, 82923 states have (on average 2.6702724214029883) internal successors, (221427), 82924 states have internal predecessors, (221427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:29,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82925 states to 82925 states and 221427 transitions. [2021-06-05 18:12:29,049 INFO L78 Accepts]: Start accepts. Automaton has 82925 states and 221427 transitions. Word has length 373 [2021-06-05 18:12:29,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:29,050 INFO L482 AbstractCegarLoop]: Abstraction has 82925 states and 221427 transitions. [2021-06-05 18:12:29,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:29,050 INFO L276 IsEmpty]: Start isEmpty. Operand 82925 states and 221427 transitions. [2021-06-05 18:12:29,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-06-05 18:12:29,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:29,457 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:12:29,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 18:12:29,673 INFO L430 AbstractCegarLoop]: === Iteration 54 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:29,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:29,673 INFO L82 PathProgramCache]: Analyzing trace with hash 257426463, now seen corresponding path program 20 times [2021-06-05 18:12:29,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:29,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784604515] [2021-06-05 18:12:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1088 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 18:12:29,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:29,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784604515] [2021-06-05 18:12:29,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784604515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:29,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935940782] [2021-06-05 18:12:29,836 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 18:12:29,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:12:29,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:29,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:29,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:30,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935940782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:30,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:30,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:12:30,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708678884] [2021-06-05 18:12:30,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:12:30,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:30,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:12:30,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:12:30,333 INFO L87 Difference]: Start difference. First operand 82925 states and 221427 transitions. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:30,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:30,808 INFO L93 Difference]: Finished difference Result 95145 states and 252251 transitions. [2021-06-05 18:12:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:12:30,809 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 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 374 [2021-06-05 18:12:30,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:30,919 INFO L225 Difference]: With dead ends: 95145 [2021-06-05 18:12:30,919 INFO L226 Difference]: Without dead ends: 95145 [2021-06-05 18:12:30,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=425, Invalid=981, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:12:31,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95145 states. [2021-06-05 18:12:32,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95145 to 85085. [2021-06-05 18:12:32,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85085 states, 85083 states have (on average 2.6719203601189427) internal successors, (227335), 85084 states have internal predecessors, (227335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:32,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85085 states to 85085 states and 227335 transitions. [2021-06-05 18:12:32,496 INFO L78 Accepts]: Start accepts. Automaton has 85085 states and 227335 transitions. Word has length 374 [2021-06-05 18:12:32,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:32,496 INFO L482 AbstractCegarLoop]: Abstraction has 85085 states and 227335 transitions. [2021-06-05 18:12:32,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:32,497 INFO L276 IsEmpty]: Start isEmpty. Operand 85085 states and 227335 transitions. [2021-06-05 18:12:32,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-06-05 18:12:32,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:32,601 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:12:32,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:32,802 INFO L430 AbstractCegarLoop]: === Iteration 55 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:32,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:32,802 INFO L82 PathProgramCache]: Analyzing trace with hash -296950667, now seen corresponding path program 21 times [2021-06-05 18:12:32,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:32,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037608533] [2021-06-05 18:12:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:32,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:32,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037608533] [2021-06-05 18:12:32,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037608533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:32,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661232770] [2021-06-05 18:12:32,963 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 18:12:33,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:12:33,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:33,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:33,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:33,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661232770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:33,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:33,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:12:33,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096911698] [2021-06-05 18:12:33,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:12:33,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:33,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:12:33,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:12:33,756 INFO L87 Difference]: Start difference. First operand 85085 states and 227335 transitions. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:34,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:34,435 INFO L93 Difference]: Finished difference Result 101015 states and 267051 transitions. [2021-06-05 18:12:34,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:12:34,435 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 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 374 [2021-06-05 18:12:34,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:34,558 INFO L225 Difference]: With dead ends: 101015 [2021-06-05 18:12:34,558 INFO L226 Difference]: Without dead ends: 101015 [2021-06-05 18:12:34,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:12:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101015 states. [2021-06-05 18:12:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101015 to 84005. [2021-06-05 18:12:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84005 states, 84003 states have (on average 2.6711069842743713) internal successors, (224381), 84004 states have internal predecessors, (224381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84005 states to 84005 states and 224381 transitions. [2021-06-05 18:12:35,966 INFO L78 Accepts]: Start accepts. Automaton has 84005 states and 224381 transitions. Word has length 374 [2021-06-05 18:12:35,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:35,967 INFO L482 AbstractCegarLoop]: Abstraction has 84005 states and 224381 transitions. [2021-06-05 18:12:35,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 84005 states and 224381 transitions. [2021-06-05 18:12:36,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-06-05 18:12:36,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:36,067 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:12:36,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 18:12:36,267 INFO L430 AbstractCegarLoop]: === Iteration 56 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:36,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:36,268 INFO L82 PathProgramCache]: Analyzing trace with hash 385219551, now seen corresponding path program 22 times [2021-06-05 18:12:36,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:36,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141424836] [2021-06-05 18:12:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:36,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:36,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141424836] [2021-06-05 18:12:36,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141424836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:36,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973205032] [2021-06-05 18:12:36,410 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 18:12:36,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:12:36,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:36,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:36,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:37,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973205032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:37,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:37,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:12:37,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155471241] [2021-06-05 18:12:37,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:12:37,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:37,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:12:37,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:12:37,223 INFO L87 Difference]: Start difference. First operand 84005 states and 224381 transitions. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:37,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:37,962 INFO L93 Difference]: Finished difference Result 104505 states and 276858 transitions. [2021-06-05 18:12:37,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:12:37,963 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 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 374 [2021-06-05 18:12:37,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:38,102 INFO L225 Difference]: With dead ends: 104505 [2021-06-05 18:12:38,102 INFO L226 Difference]: Without dead ends: 104505 [2021-06-05 18:12:38,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:12:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104505 states. [2021-06-05 18:12:39,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104505 to 85825. [2021-06-05 18:12:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85825 states, 85823 states have (on average 2.6718012653950574) internal successors, (229302), 85824 states have internal predecessors, (229302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85825 states to 85825 states and 229302 transitions. [2021-06-05 18:12:39,559 INFO L78 Accepts]: Start accepts. Automaton has 85825 states and 229302 transitions. Word has length 374 [2021-06-05 18:12:39,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:39,559 INFO L482 AbstractCegarLoop]: Abstraction has 85825 states and 229302 transitions. [2021-06-05 18:12:39,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 85825 states and 229302 transitions. [2021-06-05 18:12:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-06-05 18:12:39,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:39,662 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:12:39,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 18:12:39,865 INFO L430 AbstractCegarLoop]: === Iteration 57 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:39,865 INFO L82 PathProgramCache]: Analyzing trace with hash 604570805, now seen corresponding path program 23 times [2021-06-05 18:12:39,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:39,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777933947] [2021-06-05 18:12:39,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:40,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:40,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777933947] [2021-06-05 18:12:40,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777933947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:40,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733542214] [2021-06-05 18:12:40,007 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 18:12:40,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:12:40,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:40,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:40,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:40,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733542214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:40,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:40,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:12:40,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332874100] [2021-06-05 18:12:40,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:12:40,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:40,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:12:40,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:12:40,831 INFO L87 Difference]: Start difference. First operand 85825 states and 229302 transitions. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:41,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:41,335 INFO L93 Difference]: Finished difference Result 108940 states and 288332 transitions. [2021-06-05 18:12:41,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:12:41,336 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 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 374 [2021-06-05 18:12:41,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:41,475 INFO L225 Difference]: With dead ends: 108940 [2021-06-05 18:12:41,475 INFO L226 Difference]: Without dead ends: 108940 [2021-06-05 18:12:41,476 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:12:41,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108940 states. [2021-06-05 18:12:42,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108940 to 88725. [2021-06-05 18:12:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88725 states, 88723 states have (on average 2.6732301657969186) internal successors, (237177), 88724 states have internal predecessors, (237177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88725 states to 88725 states and 237177 transitions. [2021-06-05 18:12:42,928 INFO L78 Accepts]: Start accepts. Automaton has 88725 states and 237177 transitions. Word has length 374 [2021-06-05 18:12:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:42,929 INFO L482 AbstractCegarLoop]: Abstraction has 88725 states and 237177 transitions. [2021-06-05 18:12:42,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:42,929 INFO L276 IsEmpty]: Start isEmpty. Operand 88725 states and 237177 transitions. [2021-06-05 18:12:43,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-06-05 18:12:43,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:43,033 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:12:43,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 18:12:43,234 INFO L430 AbstractCegarLoop]: === Iteration 58 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:43,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1518943329, now seen corresponding path program 24 times [2021-06-05 18:12:43,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:43,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676945954] [2021-06-05 18:12:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:43,563 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-06-05 18:12:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:43,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:43,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676945954] [2021-06-05 18:12:43,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676945954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:43,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942388764] [2021-06-05 18:12:43,666 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 18:12:43,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:12:43,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:43,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:43,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:44,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942388764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:44,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:44,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:12:44,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004680929] [2021-06-05 18:12:44,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:12:44,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:44,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:12:44,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:12:44,376 INFO L87 Difference]: Start difference. First operand 88725 states and 237177 transitions. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:44,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:44,897 INFO L93 Difference]: Finished difference Result 111605 states and 295408 transitions. [2021-06-05 18:12:44,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:12:44,898 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 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 374 [2021-06-05 18:12:44,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:45,045 INFO L225 Difference]: With dead ends: 111605 [2021-06-05 18:12:45,045 INFO L226 Difference]: Without dead ends: 111605 [2021-06-05 18:12:45,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:12:45,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111605 states. [2021-06-05 18:12:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111605 to 91625. [2021-06-05 18:12:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91625 states, 91623 states have (on average 2.674568612684588) internal successors, (245052), 91624 states have internal predecessors, (245052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91625 states to 91625 states and 245052 transitions. [2021-06-05 18:12:46,843 INFO L78 Accepts]: Start accepts. Automaton has 91625 states and 245052 transitions. Word has length 374 [2021-06-05 18:12:46,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:46,843 INFO L482 AbstractCegarLoop]: Abstraction has 91625 states and 245052 transitions. [2021-06-05 18:12:46,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 91625 states and 245052 transitions. [2021-06-05 18:12:46,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-06-05 18:12:46,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:46,957 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:12:47,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 18:12:47,159 INFO L430 AbstractCegarLoop]: === Iteration 59 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:47,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:47,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1930712309, now seen corresponding path program 25 times [2021-06-05 18:12:47,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:47,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231272743] [2021-06-05 18:12:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:47,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:47,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231272743] [2021-06-05 18:12:47,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231272743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:47,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457854362] [2021-06-05 18:12:47,300 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 18:12:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:47,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:47,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:47,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457854362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:47,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:47,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:12:47,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971333897] [2021-06-05 18:12:47,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:12:47,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:47,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:12:47,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:12:47,815 INFO L87 Difference]: Start difference. First operand 91625 states and 245052 transitions. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:48,358 INFO L93 Difference]: Finished difference Result 108940 states and 288408 transitions. [2021-06-05 18:12:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:12:48,359 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 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 374 [2021-06-05 18:12:48,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:48,751 INFO L225 Difference]: With dead ends: 108940 [2021-06-05 18:12:48,752 INFO L226 Difference]: Without dead ends: 108940 [2021-06-05 18:12:48,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:12:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108940 states. [2021-06-05 18:12:49,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108940 to 91625. [2021-06-05 18:12:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91625 states, 91623 states have (on average 2.674568612684588) internal successors, (245052), 91624 states have internal predecessors, (245052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91625 states to 91625 states and 245052 transitions. [2021-06-05 18:12:50,135 INFO L78 Accepts]: Start accepts. Automaton has 91625 states and 245052 transitions. Word has length 374 [2021-06-05 18:12:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:50,136 INFO L482 AbstractCegarLoop]: Abstraction has 91625 states and 245052 transitions. [2021-06-05 18:12:50,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 91625 states and 245052 transitions. [2021-06-05 18:12:50,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-06-05 18:12:50,245 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:50,245 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:12:50,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:50,446 INFO L430 AbstractCegarLoop]: === Iteration 60 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:50,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1874221919, now seen corresponding path program 26 times [2021-06-05 18:12:50,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:50,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165201175] [2021-06-05 18:12:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:50,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:50,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165201175] [2021-06-05 18:12:50,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165201175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:50,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141211837] [2021-06-05 18:12:50,585 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 18:12:50,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:12:50,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:50,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:12:50,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:12:51,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141211837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:51,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:51,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:12:51,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990557945] [2021-06-05 18:12:51,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:12:51,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:51,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:12:51,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:12:51,110 INFO L87 Difference]: Start difference. First operand 91625 states and 245052 transitions. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:51,968 INFO L93 Difference]: Finished difference Result 108395 states and 287329 transitions. [2021-06-05 18:12:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:12:51,968 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 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 374 [2021-06-05 18:12:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:52,099 INFO L225 Difference]: With dead ends: 108395 [2021-06-05 18:12:52,099 INFO L226 Difference]: Without dead ends: 108395 [2021-06-05 18:12:52,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 509.3ms TimeCoverageRelationStatistics Valid=412, Invalid=1228, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:12:52,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108395 states. [2021-06-05 18:12:53,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108395 to 89465. [2021-06-05 18:12:53,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89465 states, 89463 states have (on average 2.6731050825480924) internal successors, (239144), 89464 states have internal predecessors, (239144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89465 states to 89465 states and 239144 transitions. [2021-06-05 18:12:53,559 INFO L78 Accepts]: Start accepts. Automaton has 89465 states and 239144 transitions. Word has length 374 [2021-06-05 18:12:53,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:53,560 INFO L482 AbstractCegarLoop]: Abstraction has 89465 states and 239144 transitions. [2021-06-05 18:12:53,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:53,560 INFO L276 IsEmpty]: Start isEmpty. Operand 89465 states and 239144 transitions. [2021-06-05 18:12:53,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-06-05 18:12:53,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:53,669 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, 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 18:12:53,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 18:12:53,870 INFO L430 AbstractCegarLoop]: === Iteration 61 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:53,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:53,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1993518588, now seen corresponding path program 10 times [2021-06-05 18:12:53,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:53,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278530014] [2021-06-05 18:12:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:12:54,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:54,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278530014] [2021-06-05 18:12:54,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278530014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:54,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404209505] [2021-06-05 18:12:54,066 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 18:12:54,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:12:54,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:54,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:12:54,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:54,821 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:12:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:12:55,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404209505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:55,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:55,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:12:55,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970095886] [2021-06-05 18:12:55,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:12:55,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:55,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:12:55,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:12:55,182 INFO L87 Difference]: Start difference. First operand 89465 states and 239144 transitions. Second operand has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:55,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:55,777 INFO L93 Difference]: Finished difference Result 101502 states and 269889 transitions. [2021-06-05 18:12:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:12:55,777 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 0 states have call successors, (0), 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 404 [2021-06-05 18:12:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:55,910 INFO L225 Difference]: With dead ends: 101502 [2021-06-05 18:12:55,910 INFO L226 Difference]: Without dead ends: 101502 [2021-06-05 18:12:55,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 330.2ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:12:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101502 states. [2021-06-05 18:12:57,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101502 to 93860. [2021-06-05 18:12:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93860 states, 93858 states have (on average 2.6721856421402546) internal successors, (250806), 93859 states have internal predecessors, (250806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:57,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93860 states to 93860 states and 250806 transitions. [2021-06-05 18:12:57,739 INFO L78 Accepts]: Start accepts. Automaton has 93860 states and 250806 transitions. Word has length 404 [2021-06-05 18:12:57,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:12:57,740 INFO L482 AbstractCegarLoop]: Abstraction has 93860 states and 250806 transitions. [2021-06-05 18:12:57,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:57,740 INFO L276 IsEmpty]: Start isEmpty. Operand 93860 states and 250806 transitions. [2021-06-05 18:12:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-06-05 18:12:57,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:12:57,868 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, 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, 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 18:12:58,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:12:58,068 INFO L430 AbstractCegarLoop]: === Iteration 62 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:12:58,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:12:58,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1453478165, now seen corresponding path program 22 times [2021-06-05 18:12:58,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:12:58,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720918021] [2021-06-05 18:12:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:12:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:12:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 854 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:12:58,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:12:58,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720918021] [2021-06-05 18:12:58,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720918021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:58,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38538543] [2021-06-05 18:12:58,193 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 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 18:12:58,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:12:58,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:12:58,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:12:58,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:12:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 830 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-06-05 18:12:58,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38538543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:12:58,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:12:58,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:12:58,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331079399] [2021-06-05 18:12:58,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:12:58,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:12:58,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:12:58,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:12:58,899 INFO L87 Difference]: Start difference. First operand 93860 states and 250806 transitions. Second operand has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:12:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:12:59,379 INFO L93 Difference]: Finished difference Result 113030 states and 298121 transitions. [2021-06-05 18:12:59,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:12:59,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 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 407 [2021-06-05 18:12:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:12:59,522 INFO L225 Difference]: With dead ends: 113030 [2021-06-05 18:12:59,522 INFO L226 Difference]: Without dead ends: 113030 [2021-06-05 18:12:59,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:12:59,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113030 states. [2021-06-05 18:13:01,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113030 to 85980. [2021-06-05 18:13:01,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85980 states, 85978 states have (on average 2.66896182744423) internal successors, (229472), 85979 states have internal predecessors, (229472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85980 states to 85980 states and 229472 transitions. [2021-06-05 18:13:01,248 INFO L78 Accepts]: Start accepts. Automaton has 85980 states and 229472 transitions. Word has length 407 [2021-06-05 18:13:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:01,249 INFO L482 AbstractCegarLoop]: Abstraction has 85980 states and 229472 transitions. [2021-06-05 18:13:01,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 85980 states and 229472 transitions. [2021-06-05 18:13:01,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-06-05 18:13:01,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:01,354 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, 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, 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 18:13:01,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 18:13:01,555 INFO L430 AbstractCegarLoop]: === Iteration 63 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:01,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:01,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1509968555, now seen corresponding path program 23 times [2021-06-05 18:13:01,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:01,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183705566] [2021-06-05 18:13:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 854 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:13:01,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:01,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183705566] [2021-06-05 18:13:01,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183705566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:01,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853860958] [2021-06-05 18:13:01,680 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 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 18:13:01,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:13:01,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:01,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:01,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 830 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-06-05 18:13:02,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853860958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:02,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:02,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:13:02,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451409841] [2021-06-05 18:13:02,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:13:02,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:02,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:13:02,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:13:02,266 INFO L87 Difference]: Start difference. First operand 85980 states and 229472 transitions. Second operand has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:02,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:02,978 INFO L93 Difference]: Finished difference Result 121660 states and 322114 transitions. [2021-06-05 18:13:02,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:13:02,979 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 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 407 [2021-06-05 18:13:02,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:03,136 INFO L225 Difference]: With dead ends: 121660 [2021-06-05 18:13:03,137 INFO L226 Difference]: Without dead ends: 121660 [2021-06-05 18:13:03,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:13:03,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121660 states. [2021-06-05 18:13:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121660 to 88140. [2021-06-05 18:13:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88140 states, 88138 states have (on average 2.6705847648006533) internal successors, (235380), 88139 states have internal predecessors, (235380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:04,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88140 states to 88140 states and 235380 transitions. [2021-06-05 18:13:04,786 INFO L78 Accepts]: Start accepts. Automaton has 88140 states and 235380 transitions. Word has length 407 [2021-06-05 18:13:04,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:04,786 INFO L482 AbstractCegarLoop]: Abstraction has 88140 states and 235380 transitions. [2021-06-05 18:13:04,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 88140 states and 235380 transitions. [2021-06-05 18:13:04,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-06-05 18:13:04,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:04,893 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, 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, 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 18:13:05,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:05,094 INFO L430 AbstractCegarLoop]: === Iteration 64 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:05,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1601687207, now seen corresponding path program 24 times [2021-06-05 18:13:05,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:05,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339118111] [2021-06-05 18:13:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 854 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:13:05,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:05,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339118111] [2021-06-05 18:13:05,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339118111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:05,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004068065] [2021-06-05 18:13:05,224 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 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 18:13:05,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:13:05,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:05,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:05,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 830 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-06-05 18:13:06,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004068065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:06,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:06,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:13:06,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596932584] [2021-06-05 18:13:06,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:13:06,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:06,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:13:06,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:13:06,220 INFO L87 Difference]: Start difference. First operand 88140 states and 235380 transitions. Second operand has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:06,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:06,717 INFO L93 Difference]: Finished difference Result 123185 states and 326462 transitions. [2021-06-05 18:13:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:13:06,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 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 407 [2021-06-05 18:13:06,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:06,879 INFO L225 Difference]: With dead ends: 123185 [2021-06-05 18:13:06,879 INFO L226 Difference]: Without dead ends: 123185 [2021-06-05 18:13:06,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:13:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123185 states. [2021-06-05 18:13:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123185 to 91040. [2021-06-05 18:13:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91040 states, 91038 states have (on average 2.6720160811968627) internal successors, (243255), 91039 states have internal predecessors, (243255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91040 states to 91040 states and 243255 transitions. [2021-06-05 18:13:08,807 INFO L78 Accepts]: Start accepts. Automaton has 91040 states and 243255 transitions. Word has length 407 [2021-06-05 18:13:08,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:08,807 INFO L482 AbstractCegarLoop]: Abstraction has 91040 states and 243255 transitions. [2021-06-05 18:13:08,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.375) internal successors, (358), 16 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:08,808 INFO L276 IsEmpty]: Start isEmpty. Operand 91040 states and 243255 transitions. [2021-06-05 18:13:08,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-06-05 18:13:08,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:08,916 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, 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, 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 18:13:09,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 18:13:09,117 INFO L430 AbstractCegarLoop]: === Iteration 65 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:09,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:09,117 INFO L82 PathProgramCache]: Analyzing trace with hash -515039751, now seen corresponding path program 25 times [2021-06-05 18:13:09,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:09,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728240829] [2021-06-05 18:13:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:13:09,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:09,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728240829] [2021-06-05 18:13:09,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728240829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:09,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538430106] [2021-06-05 18:13:09,233 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 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 18:13:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:09,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:09,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:13:09,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538430106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:09,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:09,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:13:09,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442639916] [2021-06-05 18:13:09,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:13:09,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:09,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:13:09,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:13:09,765 INFO L87 Difference]: Start difference. First operand 91040 states and 243255 transitions. Second operand has 16 states, 16 states have (on average 22.4375) internal successors, (359), 16 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:10,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:10,287 INFO L93 Difference]: Finished difference Result 138530 states and 366581 transitions. [2021-06-05 18:13:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:13:10,288 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.4375) internal successors, (359), 16 states have internal predecessors, (359), 0 states have call successors, (0), 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 407 [2021-06-05 18:13:10,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:10,465 INFO L225 Difference]: With dead ends: 138530 [2021-06-05 18:13:10,466 INFO L226 Difference]: Without dead ends: 138530 [2021-06-05 18:13:10,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:13:10,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138530 states. [2021-06-05 18:13:12,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138530 to 102420. [2021-06-05 18:13:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102420 states, 102418 states have (on average 2.676424066082134) internal successors, (274114), 102419 states have internal predecessors, (274114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102420 states to 102420 states and 274114 transitions. [2021-06-05 18:13:12,474 INFO L78 Accepts]: Start accepts. Automaton has 102420 states and 274114 transitions. Word has length 407 [2021-06-05 18:13:12,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:12,474 INFO L482 AbstractCegarLoop]: Abstraction has 102420 states and 274114 transitions. [2021-06-05 18:13:12,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.4375) internal successors, (359), 16 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:12,474 INFO L276 IsEmpty]: Start isEmpty. Operand 102420 states and 274114 transitions. [2021-06-05 18:13:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:13:12,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:12,607 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, 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, 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 18:13:12,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:12,808 INFO L430 AbstractCegarLoop]: === Iteration 66 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:12,808 INFO L82 PathProgramCache]: Analyzing trace with hash -891771720, now seen corresponding path program 26 times [2021-06-05 18:13:12,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:12,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629956337] [2021-06-05 18:13:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:13:12,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:12,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629956337] [2021-06-05 18:13:12,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629956337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:12,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908811563] [2021-06-05 18:13:12,957 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 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 18:13:13,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:13:13,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:13,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:13,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1060 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-06-05 18:13:13,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908811563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:13,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:13,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:13:13,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281157535] [2021-06-05 18:13:13,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:13,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:13,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:13,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:13,811 INFO L87 Difference]: Start difference. First operand 102420 states and 274114 transitions. Second operand has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:14,335 INFO L93 Difference]: Finished difference Result 123860 states and 327931 transitions. [2021-06-05 18:13:14,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:13:14,335 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 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 408 [2021-06-05 18:13:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:14,494 INFO L225 Difference]: With dead ends: 123860 [2021-06-05 18:13:14,494 INFO L226 Difference]: Without dead ends: 123860 [2021-06-05 18:13:14,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:13:14,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123860 states. [2021-06-05 18:13:15,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123860 to 97360. [2021-06-05 18:13:16,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97360 states, 97358 states have (on average 2.6739559152817436) internal successors, (260331), 97359 states have internal predecessors, (260331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:16,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97360 states to 97360 states and 260331 transitions. [2021-06-05 18:13:16,488 INFO L78 Accepts]: Start accepts. Automaton has 97360 states and 260331 transitions. Word has length 408 [2021-06-05 18:13:16,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:16,488 INFO L482 AbstractCegarLoop]: Abstraction has 97360 states and 260331 transitions. [2021-06-05 18:13:16,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:16,488 INFO L276 IsEmpty]: Start isEmpty. Operand 97360 states and 260331 transitions. [2021-06-05 18:13:16,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:13:16,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:16,606 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, 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, 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 18:13:16,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 18:13:16,807 INFO L430 AbstractCegarLoop]: === Iteration 67 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:16,808 INFO L82 PathProgramCache]: Analyzing trace with hash -672420466, now seen corresponding path program 27 times [2021-06-05 18:13:16,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:16,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074765388] [2021-06-05 18:13:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:13:16,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:16,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074765388] [2021-06-05 18:13:16,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074765388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:16,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673641151] [2021-06-05 18:13:16,957 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 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 18:13:17,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:13:17,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:17,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:17,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1060 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-06-05 18:13:17,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673641151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:17,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:17,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:13:17,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481992551] [2021-06-05 18:13:17,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:17,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:17,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:17,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:17,709 INFO L87 Difference]: Start difference. First operand 97360 states and 260331 transitions. Second operand has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:18,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:18,302 INFO L93 Difference]: Finished difference Result 134650 states and 356772 transitions. [2021-06-05 18:13:18,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:13:18,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 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 408 [2021-06-05 18:13:18,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:18,771 INFO L225 Difference]: With dead ends: 134650 [2021-06-05 18:13:18,772 INFO L226 Difference]: Without dead ends: 134650 [2021-06-05 18:13:18,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:13:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134650 states. [2021-06-05 18:13:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134650 to 99180. [2021-06-05 18:13:20,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99180 states, 99178 states have (on average 2.6745044263848836) internal successors, (265252), 99179 states have internal predecessors, (265252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99180 states to 99180 states and 265252 transitions. [2021-06-05 18:13:20,389 INFO L78 Accepts]: Start accepts. Automaton has 99180 states and 265252 transitions. Word has length 408 [2021-06-05 18:13:20,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:20,389 INFO L482 AbstractCegarLoop]: Abstraction has 99180 states and 265252 transitions. [2021-06-05 18:13:20,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:20,389 INFO L276 IsEmpty]: Start isEmpty. Operand 99180 states and 265252 transitions. [2021-06-05 18:13:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:13:20,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:20,500 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, 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, 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 18:13:20,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:20,701 INFO L430 AbstractCegarLoop]: === Iteration 68 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:20,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:20,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1499032696, now seen corresponding path program 28 times [2021-06-05 18:13:20,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:20,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062840436] [2021-06-05 18:13:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:13:20,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:20,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062840436] [2021-06-05 18:13:20,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062840436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:20,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450577608] [2021-06-05 18:13:20,870 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 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 18:13:21,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:13:21,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:21,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:21,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1060 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-06-05 18:13:21,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450577608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:21,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:21,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:13:21,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186015970] [2021-06-05 18:13:21,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:21,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:21,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:21,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:21,659 INFO L87 Difference]: Start difference. First operand 99180 states and 265252 transitions. Second operand has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:22,498 INFO L93 Difference]: Finished difference Result 135530 states and 359644 transitions. [2021-06-05 18:13:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:13:22,498 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 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 408 [2021-06-05 18:13:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:22,672 INFO L225 Difference]: With dead ends: 135530 [2021-06-05 18:13:22,672 INFO L226 Difference]: Without dead ends: 135530 [2021-06-05 18:13:22,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=373, Invalid=1033, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:13:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135530 states. [2021-06-05 18:13:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135530 to 97360. [2021-06-05 18:13:24,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97360 states, 97358 states have (on average 2.6739559152817436) internal successors, (260331), 97359 states have internal predecessors, (260331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97360 states to 97360 states and 260331 transitions. [2021-06-05 18:13:24,390 INFO L78 Accepts]: Start accepts. Automaton has 97360 states and 260331 transitions. Word has length 408 [2021-06-05 18:13:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:24,391 INFO L482 AbstractCegarLoop]: Abstraction has 97360 states and 260331 transitions. [2021-06-05 18:13:24,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand 97360 states and 260331 transitions. [2021-06-05 18:13:24,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:13:24,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:24,864 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, 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, 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 18:13:25,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 18:13:25,093 INFO L430 AbstractCegarLoop]: === Iteration 69 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:25,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:25,094 INFO L82 PathProgramCache]: Analyzing trace with hash 653721038, now seen corresponding path program 29 times [2021-06-05 18:13:25,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:25,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850759787] [2021-06-05 18:13:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:13:25,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:25,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850759787] [2021-06-05 18:13:25,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850759787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:25,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583838597] [2021-06-05 18:13:25,261 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 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 18:13:25,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:13:25,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:25,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:25,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1060 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-06-05 18:13:25,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583838597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:25,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:25,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:13:25,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752938162] [2021-06-05 18:13:25,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:25,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:25,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:25,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:25,879 INFO L87 Difference]: Start difference. First operand 97360 states and 260331 transitions. Second operand has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:26,458 INFO L93 Difference]: Finished difference Result 126655 states and 336138 transitions. [2021-06-05 18:13:26,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:13:26,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 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 408 [2021-06-05 18:13:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:26,627 INFO L225 Difference]: With dead ends: 126655 [2021-06-05 18:13:26,628 INFO L226 Difference]: Without dead ends: 126655 [2021-06-05 18:13:26,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:13:26,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126655 states. [2021-06-05 18:13:28,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126655 to 98440. [2021-06-05 18:13:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98440 states, 98438 states have (on average 2.6746276844308094) internal successors, (263285), 98439 states have internal predecessors, (263285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98440 states to 98440 states and 263285 transitions. [2021-06-05 18:13:28,534 INFO L78 Accepts]: Start accepts. Automaton has 98440 states and 263285 transitions. Word has length 408 [2021-06-05 18:13:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:28,534 INFO L482 AbstractCegarLoop]: Abstraction has 98440 states and 263285 transitions. [2021-06-05 18:13:28,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 98440 states and 263285 transitions. [2021-06-05 18:13:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:13:28,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:28,646 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, 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, 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 18:13:28,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 18:13:28,847 INFO L430 AbstractCegarLoop]: === Iteration 70 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:28,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:28,847 INFO L82 PathProgramCache]: Analyzing trace with hash 597230648, now seen corresponding path program 30 times [2021-06-05 18:13:28,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:28,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255346719] [2021-06-05 18:13:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-06-05 18:13:28,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:28,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255346719] [2021-06-05 18:13:28,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255346719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:28,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911517839] [2021-06-05 18:13:28,995 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 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 18:13:29,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:13:29,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:29,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:29,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1060 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-06-05 18:13:29,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911517839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:29,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:29,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:13:29,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742437101] [2021-06-05 18:13:29,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:29,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:29,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:29,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:29,685 INFO L87 Difference]: Start difference. First operand 98440 states and 263285 transitions. Second operand has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:30,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:30,480 INFO L93 Difference]: Finished difference Result 123140 states and 326668 transitions. [2021-06-05 18:13:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:13:30,481 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 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 408 [2021-06-05 18:13:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:30,638 INFO L225 Difference]: With dead ends: 123140 [2021-06-05 18:13:30,638 INFO L226 Difference]: Without dead ends: 123140 [2021-06-05 18:13:30,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:13:30,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123140 states. [2021-06-05 18:13:32,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123140 to 99520. [2021-06-05 18:13:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99520 states, 99518 states have (on average 2.6752848730882857) internal successors, (266239), 99519 states have internal predecessors, (266239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99520 states to 99520 states and 266239 transitions. [2021-06-05 18:13:32,331 INFO L78 Accepts]: Start accepts. Automaton has 99520 states and 266239 transitions. Word has length 408 [2021-06-05 18:13:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:32,332 INFO L482 AbstractCegarLoop]: Abstraction has 99520 states and 266239 transitions. [2021-06-05 18:13:32,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 99520 states and 266239 transitions. [2021-06-05 18:13:32,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:13:32,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:32,446 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, 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, 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 18:13:32,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 18:13:32,647 INFO L430 AbstractCegarLoop]: === Iteration 71 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:32,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:32,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1866446724, now seen corresponding path program 31 times [2021-06-05 18:13:32,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:32,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684905211] [2021-06-05 18:13:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:33,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:33,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684905211] [2021-06-05 18:13:33,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684905211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:33,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468257837] [2021-06-05 18:13:33,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:13:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:33,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:33,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:33,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468257837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:33,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:33,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:33,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410074043] [2021-06-05 18:13:33,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:33,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:33,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:33,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:33,698 INFO L87 Difference]: Start difference. First operand 99520 states and 266239 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:34,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:34,217 INFO L93 Difference]: Finished difference Result 126050 states and 333514 transitions. [2021-06-05 18:13:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:13:34,217 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 408 [2021-06-05 18:13:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:34,384 INFO L225 Difference]: With dead ends: 126050 [2021-06-05 18:13:34,384 INFO L226 Difference]: Without dead ends: 126050 [2021-06-05 18:13:34,384 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:13:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126050 states. [2021-06-05 18:13:36,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126050 to 96880. [2021-06-05 18:13:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96880 states, 96878 states have (on average 2.673744296950804) internal successors, (259027), 96879 states have internal predecessors, (259027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96880 states to 96880 states and 259027 transitions. [2021-06-05 18:13:36,294 INFO L78 Accepts]: Start accepts. Automaton has 96880 states and 259027 transitions. Word has length 408 [2021-06-05 18:13:36,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:36,295 INFO L482 AbstractCegarLoop]: Abstraction has 96880 states and 259027 transitions. [2021-06-05 18:13:36,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:36,295 INFO L276 IsEmpty]: Start isEmpty. Operand 96880 states and 259027 transitions. [2021-06-05 18:13:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:13:36,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:36,419 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, 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, 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 18:13:36,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:36,620 INFO L430 AbstractCegarLoop]: === Iteration 72 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:36,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:36,620 INFO L82 PathProgramCache]: Analyzing trace with hash 305006438, now seen corresponding path program 32 times [2021-06-05 18:13:36,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:36,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763880782] [2021-06-05 18:13:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:36,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:36,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763880782] [2021-06-05 18:13:36,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763880782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:36,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605497456] [2021-06-05 18:13:36,754 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 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 18:13:36,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:13:36,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:36,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:36,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:37,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605497456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:37,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:37,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:37,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960554991] [2021-06-05 18:13:37,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:37,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:37,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:37,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:37,299 INFO L87 Difference]: Start difference. First operand 96880 states and 259027 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:38,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:38,168 INFO L93 Difference]: Finished difference Result 159640 states and 424263 transitions. [2021-06-05 18:13:38,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:13:38,169 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 408 [2021-06-05 18:13:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:38,366 INFO L225 Difference]: With dead ends: 159640 [2021-06-05 18:13:38,366 INFO L226 Difference]: Without dead ends: 159640 [2021-06-05 18:13:38,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:13:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159640 states. [2021-06-05 18:13:40,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159640 to 104500. [2021-06-05 18:13:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104500 states, 104498 states have (on average 2.676587111715057) internal successors, (279698), 104499 states have internal predecessors, (279698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104500 states to 104500 states and 279698 transitions. [2021-06-05 18:13:40,824 INFO L78 Accepts]: Start accepts. Automaton has 104500 states and 279698 transitions. Word has length 408 [2021-06-05 18:13:40,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:40,824 INFO L482 AbstractCegarLoop]: Abstraction has 104500 states and 279698 transitions. [2021-06-05 18:13:40,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 104500 states and 279698 transitions. [2021-06-05 18:13:40,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:13:40,969 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:40,970 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, 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, 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 18:13:41,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:41,186 INFO L430 AbstractCegarLoop]: === Iteration 73 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:41,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:41,187 INFO L82 PathProgramCache]: Analyzing trace with hash -540305220, now seen corresponding path program 33 times [2021-06-05 18:13:41,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:41,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234576477] [2021-06-05 18:13:41,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:41,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:41,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234576477] [2021-06-05 18:13:41,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234576477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:41,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974346198] [2021-06-05 18:13:41,407 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 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 18:13:41,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:13:41,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:41,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:41,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:42,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974346198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:42,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:42,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:42,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810976849] [2021-06-05 18:13:42,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:42,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:42,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:42,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:42,160 INFO L87 Difference]: Start difference. First operand 104500 states and 279698 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:42,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:42,751 INFO L93 Difference]: Finished difference Result 151865 states and 404132 transitions. [2021-06-05 18:13:42,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:13:42,752 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 408 [2021-06-05 18:13:42,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:42,946 INFO L225 Difference]: With dead ends: 151865 [2021-06-05 18:13:42,946 INFO L226 Difference]: Without dead ends: 151865 [2021-06-05 18:13:42,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=315, Invalid=945, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:13:43,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151865 states. [2021-06-05 18:13:44,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151865 to 105580. [2021-06-05 18:13:44,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105580 states, 105578 states have (on average 2.677186535073595) internal successors, (282652), 105579 states have internal predecessors, (282652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105580 states to 105580 states and 282652 transitions. [2021-06-05 18:13:44,958 INFO L78 Accepts]: Start accepts. Automaton has 105580 states and 282652 transitions. Word has length 408 [2021-06-05 18:13:44,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:44,958 INFO L482 AbstractCegarLoop]: Abstraction has 105580 states and 282652 transitions. [2021-06-05 18:13:44,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:44,958 INFO L276 IsEmpty]: Start isEmpty. Operand 105580 states and 282652 transitions. [2021-06-05 18:13:45,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:13:45,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:45,101 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, 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, 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 18:13:45,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:45,301 INFO L430 AbstractCegarLoop]: === Iteration 74 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:45,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:45,302 INFO L82 PathProgramCache]: Analyzing trace with hash -596795610, now seen corresponding path program 34 times [2021-06-05 18:13:45,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:45,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477502954] [2021-06-05 18:13:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:45,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:45,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477502954] [2021-06-05 18:13:45,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477502954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:45,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735755532] [2021-06-05 18:13:45,438 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 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 18:13:45,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:13:45,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:45,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:45,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:46,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735755532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:46,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:46,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:46,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015610633] [2021-06-05 18:13:46,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:46,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:46,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:46,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:46,192 INFO L87 Difference]: Start difference. First operand 105580 states and 282652 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:47,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:47,117 INFO L93 Difference]: Finished difference Result 143995 states and 382595 transitions. [2021-06-05 18:13:47,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:13:47,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 408 [2021-06-05 18:13:47,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:47,309 INFO L225 Difference]: With dead ends: 143995 [2021-06-05 18:13:47,309 INFO L226 Difference]: Without dead ends: 143995 [2021-06-05 18:13:47,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 223.8ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:13:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143995 states. [2021-06-05 18:13:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143995 to 104500. [2021-06-05 18:13:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104500 states, 104498 states have (on average 2.676587111715057) internal successors, (279698), 104499 states have internal predecessors, (279698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104500 states to 104500 states and 279698 transitions. [2021-06-05 18:13:49,599 INFO L78 Accepts]: Start accepts. Automaton has 104500 states and 279698 transitions. Word has length 408 [2021-06-05 18:13:49,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:49,599 INFO L482 AbstractCegarLoop]: Abstraction has 104500 states and 279698 transitions. [2021-06-05 18:13:49,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 104500 states and 279698 transitions. [2021-06-05 18:13:49,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:13:49,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:49,724 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, 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, 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 18:13:49,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 18:13:49,937 INFO L430 AbstractCegarLoop]: === Iteration 75 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:49,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:49,937 INFO L82 PathProgramCache]: Analyzing trace with hash 438750008, now seen corresponding path program 35 times [2021-06-05 18:13:49,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:49,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101882099] [2021-06-05 18:13:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:50,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:50,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101882099] [2021-06-05 18:13:50,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101882099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:50,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421730062] [2021-06-05 18:13:50,078 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 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 18:13:50,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:13:50,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:50,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:50,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:50,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421730062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:50,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:50,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:50,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784981077] [2021-06-05 18:13:50,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:50,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:50,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:50,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:50,945 INFO L87 Difference]: Start difference. First operand 104500 states and 279698 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:51,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:51,793 INFO L93 Difference]: Finished difference Result 136115 states and 360628 transitions. [2021-06-05 18:13:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:13:51,793 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 408 [2021-06-05 18:13:51,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:51,950 INFO L225 Difference]: With dead ends: 136115 [2021-06-05 18:13:51,950 INFO L226 Difference]: Without dead ends: 136115 [2021-06-05 18:13:51,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=318, Invalid=942, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:13:52,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136115 states. [2021-06-05 18:13:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136115 to 101860. [2021-06-05 18:13:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101860 states, 101858 states have (on average 2.675155608788706) internal successors, (272486), 101859 states have internal predecessors, (272486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101860 states to 101860 states and 272486 transitions. [2021-06-05 18:13:53,556 INFO L78 Accepts]: Start accepts. Automaton has 101860 states and 272486 transitions. Word has length 408 [2021-06-05 18:13:53,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:53,557 INFO L482 AbstractCegarLoop]: Abstraction has 101860 states and 272486 transitions. [2021-06-05 18:13:53,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand 101860 states and 272486 transitions. [2021-06-05 18:13:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:13:53,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:53,690 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, 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, 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 18:13:53,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:53,891 INFO L430 AbstractCegarLoop]: === Iteration 76 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:53,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:53,891 INFO L82 PathProgramCache]: Analyzing trace with hash -406561650, now seen corresponding path program 36 times [2021-06-05 18:13:53,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:53,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685867508] [2021-06-05 18:13:53,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:54,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:54,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685867508] [2021-06-05 18:13:54,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685867508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:54,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507868938] [2021-06-05 18:13:54,032 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 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 18:13:54,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:13:54,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:54,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:54,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:55,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507868938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:55,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:55,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:55,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757995548] [2021-06-05 18:13:55,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:55,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:55,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:55,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:55,029 INFO L87 Difference]: Start difference. First operand 101860 states and 272486 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:55,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:55,692 INFO L93 Difference]: Finished difference Result 182905 states and 487826 transitions. [2021-06-05 18:13:55,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:13:55,692 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 408 [2021-06-05 18:13:55,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:55,942 INFO L225 Difference]: With dead ends: 182905 [2021-06-05 18:13:55,942 INFO L226 Difference]: Without dead ends: 182905 [2021-06-05 18:13:55,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:13:56,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182905 states. [2021-06-05 18:13:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182905 to 108740. [2021-06-05 18:13:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108740 states, 108738 states have (on average 2.677904688333425) internal successors, (291190), 108739 states have internal predecessors, (291190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108740 states to 108740 states and 291190 transitions. [2021-06-05 18:13:58,307 INFO L78 Accepts]: Start accepts. Automaton has 108740 states and 291190 transitions. Word has length 408 [2021-06-05 18:13:58,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:58,307 INFO L482 AbstractCegarLoop]: Abstraction has 108740 states and 291190 transitions. [2021-06-05 18:13:58,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:58,307 INFO L276 IsEmpty]: Start isEmpty. Operand 108740 states and 291190 transitions. [2021-06-05 18:13:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:13:58,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:58,448 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, 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, 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 18:13:58,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:58,649 INFO L430 AbstractCegarLoop]: === Iteration 77 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:58,649 INFO L82 PathProgramCache]: Analyzing trace with hash -463052040, now seen corresponding path program 37 times [2021-06-05 18:13:58,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:58,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555572135] [2021-06-05 18:13:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:58,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:58,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555572135] [2021-06-05 18:13:58,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555572135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:58,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253303374] [2021-06-05 18:13:58,785 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 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 18:13:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:58,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:13:58,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:13:59,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253303374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:59,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:59,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:59,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318217952] [2021-06-05 18:13:59,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:59,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:59,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:59,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:59,307 INFO L87 Difference]: Start difference. First operand 108740 states and 291190 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:00,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:00,219 INFO L93 Difference]: Finished difference Result 167880 states and 447060 transitions. [2021-06-05 18:14:00,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:14:00,219 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 408 [2021-06-05 18:14:00,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:00,446 INFO L225 Difference]: With dead ends: 167880 [2021-06-05 18:14:00,446 INFO L226 Difference]: Without dead ends: 167880 [2021-06-05 18:14:00,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=325, Invalid=1007, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:14:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167880 states. [2021-06-05 18:14:02,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167880 to 111640. [2021-06-05 18:14:02,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111640 states, 111638 states have (on average 2.6788817427757574) internal successors, (299065), 111639 states have internal predecessors, (299065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111640 states to 111640 states and 299065 transitions. [2021-06-05 18:14:02,708 INFO L78 Accepts]: Start accepts. Automaton has 111640 states and 299065 transitions. Word has length 408 [2021-06-05 18:14:02,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:02,709 INFO L482 AbstractCegarLoop]: Abstraction has 111640 states and 299065 transitions. [2021-06-05 18:14:02,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:02,709 INFO L276 IsEmpty]: Start isEmpty. Operand 111640 states and 299065 transitions. [2021-06-05 18:14:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:14:02,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:02,848 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, 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, 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 18:14:03,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:03,048 INFO L430 AbstractCegarLoop]: === Iteration 78 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:03,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1678619132, now seen corresponding path program 38 times [2021-06-05 18:14:03,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:03,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852925308] [2021-06-05 18:14:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:03,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:03,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852925308] [2021-06-05 18:14:03,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852925308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:03,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827235247] [2021-06-05 18:14:03,185 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 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 18:14:03,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:14:03,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:03,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:03,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:03,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827235247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:03,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:03,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:14:03,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839299500] [2021-06-05 18:14:03,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:03,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:03,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:03,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:03,733 INFO L87 Difference]: Start difference. First operand 111640 states and 299065 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:04,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:04,598 INFO L93 Difference]: Finished difference Result 141390 states and 375856 transitions. [2021-06-05 18:14:04,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:14:04,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 408 [2021-06-05 18:14:04,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:04,783 INFO L225 Difference]: With dead ends: 141390 [2021-06-05 18:14:04,783 INFO L226 Difference]: Without dead ends: 141390 [2021-06-05 18:14:04,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:14:04,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141390 states. [2021-06-05 18:14:06,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141390 to 117700. [2021-06-05 18:14:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117700 states, 117698 states have (on average 2.6804023857669628) internal successors, (315478), 117699 states have internal predecessors, (315478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:07,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117700 states to 117700 states and 315478 transitions. [2021-06-05 18:14:07,067 INFO L78 Accepts]: Start accepts. Automaton has 117700 states and 315478 transitions. Word has length 408 [2021-06-05 18:14:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:07,067 INFO L482 AbstractCegarLoop]: Abstraction has 117700 states and 315478 transitions. [2021-06-05 18:14:07,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:07,067 INFO L276 IsEmpty]: Start isEmpty. Operand 117700 states and 315478 transitions. [2021-06-05 18:14:07,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:14:07,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:07,217 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, 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, 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 18:14:07,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 18:14:07,417 INFO L430 AbstractCegarLoop]: === Iteration 79 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:07,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:07,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1622128742, now seen corresponding path program 39 times [2021-06-05 18:14:07,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:07,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266369458] [2021-06-05 18:14:07,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:07,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:07,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266369458] [2021-06-05 18:14:07,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266369458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:07,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376536600] [2021-06-05 18:14:07,550 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 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 18:14:07,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:14:07,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:07,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:07,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:08,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376536600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:08,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:08,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:14:08,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699840994] [2021-06-05 18:14:08,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:08,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:08,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:08,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:08,226 INFO L87 Difference]: Start difference. First operand 117700 states and 315478 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:09,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:09,232 INFO L93 Difference]: Finished difference Result 187300 states and 500018 transitions. [2021-06-05 18:14:09,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:14:09,233 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 408 [2021-06-05 18:14:09,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:09,459 INFO L225 Difference]: With dead ends: 187300 [2021-06-05 18:14:09,460 INFO L226 Difference]: Without dead ends: 187300 [2021-06-05 18:14:09,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=326, Invalid=1006, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:14:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187300 states. [2021-06-05 18:14:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187300 to 120600. [2021-06-05 18:14:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120600 states, 120598 states have (on average 2.681246786845553) internal successors, (323353), 120599 states have internal predecessors, (323353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120600 states to 120600 states and 323353 transitions. [2021-06-05 18:14:11,937 INFO L78 Accepts]: Start accepts. Automaton has 120600 states and 323353 transitions. Word has length 408 [2021-06-05 18:14:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:11,937 INFO L482 AbstractCegarLoop]: Abstraction has 120600 states and 323353 transitions. [2021-06-05 18:14:11,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand 120600 states and 323353 transitions. [2021-06-05 18:14:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-06-05 18:14:12,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:12,075 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, 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, 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 18:14:12,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:12,277 INFO L430 AbstractCegarLoop]: === Iteration 80 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:12,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:12,278 INFO L82 PathProgramCache]: Analyzing trace with hash 438817208, now seen corresponding path program 40 times [2021-06-05 18:14:12,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:12,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800349708] [2021-06-05 18:14:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:12,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:12,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800349708] [2021-06-05 18:14:12,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800349708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:12,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815815955] [2021-06-05 18:14:12,426 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 18:14:12,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:14:12,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:12,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:12,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 18:14:13,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815815955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:13,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:13,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:14:13,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369132383] [2021-06-05 18:14:13,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:14:13,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:13,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:14:13,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:14:13,154 INFO L87 Difference]: Start difference. First operand 120600 states and 323353 transitions. Second operand has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:14,059 INFO L93 Difference]: Finished difference Result 145420 states and 386923 transitions. [2021-06-05 18:14:14,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:14:14,060 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 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 408 [2021-06-05 18:14:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:14,229 INFO L225 Difference]: With dead ends: 145420 [2021-06-05 18:14:14,229 INFO L226 Difference]: Without dead ends: 145420 [2021-06-05 18:14:14,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:14:14,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145420 states. [2021-06-05 18:14:15,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145420 to 122420. [2021-06-05 18:14:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122420 states, 122418 states have (on average 2.6815827737750983) internal successors, (328274), 122419 states have internal predecessors, (328274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122420 states to 122420 states and 328274 transitions. [2021-06-05 18:14:16,173 INFO L78 Accepts]: Start accepts. Automaton has 122420 states and 328274 transitions. Word has length 408 [2021-06-05 18:14:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:16,173 INFO L482 AbstractCegarLoop]: Abstraction has 122420 states and 328274 transitions. [2021-06-05 18:14:16,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.789473684210527) internal successors, (395), 19 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 122420 states and 328274 transitions. [2021-06-05 18:14:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:14:16,650 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:16,650 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:14:16,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 18:14:16,865 INFO L430 AbstractCegarLoop]: === Iteration 81 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:16,865 INFO L82 PathProgramCache]: Analyzing trace with hash -479265763, now seen corresponding path program 27 times [2021-06-05 18:14:16,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:16,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814363417] [2021-06-05 18:14:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1383 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 18:14:17,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:17,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814363417] [2021-06-05 18:14:17,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814363417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:17,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988012129] [2021-06-05 18:14:17,043 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 18:14:17,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:14:17,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:17,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:17,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:14:18,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988012129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:18,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:18,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 22 [2021-06-05 18:14:18,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905102570] [2021-06-05 18:14:18,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:18,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:18,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:18,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:18,011 INFO L87 Difference]: Start difference. First operand 122420 states and 328274 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:18,672 INFO L93 Difference]: Finished difference Result 135850 states and 361956 transitions. [2021-06-05 18:14:18,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:14:18,672 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 409 [2021-06-05 18:14:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:18,853 INFO L225 Difference]: With dead ends: 135850 [2021-06-05 18:14:18,853 INFO L226 Difference]: Without dead ends: 135850 [2021-06-05 18:14:18,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:14:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135850 states. [2021-06-05 18:14:20,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135850 to 123500. [2021-06-05 18:14:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123500 states, 123498 states have (on average 2.6820515311988857) internal successors, (331228), 123499 states have internal predecessors, (331228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:20,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123500 states to 123500 states and 331228 transitions. [2021-06-05 18:14:20,982 INFO L78 Accepts]: Start accepts. Automaton has 123500 states and 331228 transitions. Word has length 409 [2021-06-05 18:14:20,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:20,983 INFO L482 AbstractCegarLoop]: Abstraction has 123500 states and 331228 transitions. [2021-06-05 18:14:20,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:20,983 INFO L276 IsEmpty]: Start isEmpty. Operand 123500 states and 331228 transitions. [2021-06-05 18:14:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:14:21,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:21,137 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:14:21,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:21,337 INFO L430 AbstractCegarLoop]: === Iteration 82 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:21,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1586170887, now seen corresponding path program 28 times [2021-06-05 18:14:21,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:21,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899633714] [2021-06-05 18:14:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:14:21,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:21,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899633714] [2021-06-05 18:14:21,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899633714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:21,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423395614] [2021-06-05 18:14:21,504 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 18:14:22,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:14:22,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:22,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:22,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:14:22,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423395614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:22,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:22,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:14:22,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240727592] [2021-06-05 18:14:22,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:22,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:22,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:22,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:22,583 INFO L87 Difference]: Start difference. First operand 123500 states and 331228 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:23,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:23,180 INFO L93 Difference]: Finished difference Result 143405 states and 381139 transitions. [2021-06-05 18:14:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:14:23,181 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 409 [2021-06-05 18:14:23,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:23,364 INFO L225 Difference]: With dead ends: 143405 [2021-06-05 18:14:23,364 INFO L226 Difference]: Without dead ends: 143405 [2021-06-05 18:14:23,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=451, Invalid=1109, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:14:23,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143405 states. [2021-06-05 18:14:25,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143405 to 123500. [2021-06-05 18:14:25,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123500 states, 123498 states have (on average 2.6820515311988857) internal successors, (331228), 123499 states have internal predecessors, (331228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123500 states to 123500 states and 331228 transitions. [2021-06-05 18:14:25,561 INFO L78 Accepts]: Start accepts. Automaton has 123500 states and 331228 transitions. Word has length 409 [2021-06-05 18:14:25,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:25,561 INFO L482 AbstractCegarLoop]: Abstraction has 123500 states and 331228 transitions. [2021-06-05 18:14:25,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:25,561 INFO L276 IsEmpty]: Start isEmpty. Operand 123500 states and 331228 transitions. [2021-06-05 18:14:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:14:25,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:25,720 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:14:25,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:25,931 INFO L430 AbstractCegarLoop]: === Iteration 83 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:25,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:25,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1031793757, now seen corresponding path program 29 times [2021-06-05 18:14:25,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:25,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327607003] [2021-06-05 18:14:25,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:14:26,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:26,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327607003] [2021-06-05 18:14:26,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327607003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:26,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989876973] [2021-06-05 18:14:26,096 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 18:14:26,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:14:26,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:26,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:26,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:14:27,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989876973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:27,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:27,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:14:27,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354340307] [2021-06-05 18:14:27,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:27,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:27,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:27,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:27,122 INFO L87 Difference]: Start difference. First operand 123500 states and 331228 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:27,751 INFO L93 Difference]: Finished difference Result 144155 states and 383479 transitions. [2021-06-05 18:14:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:14:27,751 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 409 [2021-06-05 18:14:27,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:27,940 INFO L225 Difference]: With dead ends: 144155 [2021-06-05 18:14:27,940 INFO L226 Difference]: Without dead ends: 144155 [2021-06-05 18:14:27,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=462, Invalid=1178, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:14:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144155 states. [2021-06-05 18:14:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144155 to 121340. [2021-06-05 18:14:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121340 states, 121338 states have (on average 2.6811056717598776) internal successors, (325320), 121339 states have internal predecessors, (325320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:30,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121340 states to 121340 states and 325320 transitions. [2021-06-05 18:14:30,187 INFO L78 Accepts]: Start accepts. Automaton has 121340 states and 325320 transitions. Word has length 409 [2021-06-05 18:14:30,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:30,188 INFO L482 AbstractCegarLoop]: Abstraction has 121340 states and 325320 transitions. [2021-06-05 18:14:30,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 121340 states and 325320 transitions. [2021-06-05 18:14:30,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:14:30,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:30,341 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:14:30,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:30,541 INFO L430 AbstractCegarLoop]: === Iteration 84 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:30,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1713963975, now seen corresponding path program 30 times [2021-06-05 18:14:30,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:30,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233605868] [2021-06-05 18:14:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:14:30,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:30,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233605868] [2021-06-05 18:14:30,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233605868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:30,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734413792] [2021-06-05 18:14:30,703 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 18:14:31,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:14:31,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:31,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:31,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:14:31,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734413792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:31,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:31,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:14:31,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495869307] [2021-06-05 18:14:31,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:31,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:31,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:31,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:31,510 INFO L87 Difference]: Start difference. First operand 121340 states and 325320 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:32,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:32,451 INFO L93 Difference]: Finished difference Result 149875 states and 398204 transitions. [2021-06-05 18:14:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:14:32,451 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 409 [2021-06-05 18:14:32,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:32,635 INFO L225 Difference]: With dead ends: 149875 [2021-06-05 18:14:32,635 INFO L226 Difference]: Without dead ends: 149875 [2021-06-05 18:14:32,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 598.3ms TimeCoverageRelationStatistics Valid=473, Invalid=1249, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:14:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149875 states. [2021-06-05 18:14:34,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149875 to 123160. [2021-06-05 18:14:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123160 states, 123158 states have (on average 2.6814417252634826) internal successors, (330241), 123159 states have internal predecessors, (330241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123160 states to 123160 states and 330241 transitions. [2021-06-05 18:14:35,214 INFO L78 Accepts]: Start accepts. Automaton has 123160 states and 330241 transitions. Word has length 409 [2021-06-05 18:14:35,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:35,215 INFO L482 AbstractCegarLoop]: Abstraction has 123160 states and 330241 transitions. [2021-06-05 18:14:35,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 123160 states and 330241 transitions. [2021-06-05 18:14:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:14:35,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:35,378 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:14:35,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:35,600 INFO L430 AbstractCegarLoop]: === Iteration 85 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:35,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:35,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1933315229, now seen corresponding path program 31 times [2021-06-05 18:14:35,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:35,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120510883] [2021-06-05 18:14:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:14:35,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:35,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120510883] [2021-06-05 18:14:35,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120510883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:35,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370309692] [2021-06-05 18:14:35,783 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 18:14:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:35,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:35,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:14:36,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370309692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:36,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:36,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:14:36,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371669377] [2021-06-05 18:14:36,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:36,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:36,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:36,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:36,360 INFO L87 Difference]: Start difference. First operand 123160 states and 330241 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:37,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:37,032 INFO L93 Difference]: Finished difference Result 153705 states and 408249 transitions. [2021-06-05 18:14:37,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:14:37,032 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 409 [2021-06-05 18:14:37,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:37,548 INFO L225 Difference]: With dead ends: 153705 [2021-06-05 18:14:37,549 INFO L226 Difference]: Without dead ends: 153705 [2021-06-05 18:14:37,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 284.3ms TimeCoverageRelationStatistics Valid=484, Invalid=1322, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:14:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153705 states. [2021-06-05 18:14:39,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153705 to 126060. [2021-06-05 18:14:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126060 states, 126058 states have (on average 2.6822256421647177) internal successors, (338116), 126059 states have internal predecessors, (338116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126060 states to 126060 states and 338116 transitions. [2021-06-05 18:14:39,454 INFO L78 Accepts]: Start accepts. Automaton has 126060 states and 338116 transitions. Word has length 409 [2021-06-05 18:14:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:39,454 INFO L482 AbstractCegarLoop]: Abstraction has 126060 states and 338116 transitions. [2021-06-05 18:14:39,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 126060 states and 338116 transitions. [2021-06-05 18:14:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:14:39,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:39,611 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:14:39,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:39,811 INFO L430 AbstractCegarLoop]: === Iteration 86 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:39,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:39,812 INFO L82 PathProgramCache]: Analyzing trace with hash -190198905, now seen corresponding path program 32 times [2021-06-05 18:14:39,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:39,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217805235] [2021-06-05 18:14:39,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:14:40,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:40,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217805235] [2021-06-05 18:14:40,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217805235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:40,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711597150] [2021-06-05 18:14:40,381 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 18:14:40,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:14:40,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:40,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:40,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:14:40,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711597150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:40,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:40,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:14:40,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320739532] [2021-06-05 18:14:40,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:40,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:40,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:40,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:40,983 INFO L87 Difference]: Start difference. First operand 126060 states and 338116 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:41,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:41,627 INFO L93 Difference]: Finished difference Result 154685 states and 410942 transitions. [2021-06-05 18:14:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:14:41,627 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 409 [2021-06-05 18:14:41,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:41,825 INFO L225 Difference]: With dead ends: 154685 [2021-06-05 18:14:41,825 INFO L226 Difference]: Without dead ends: 154685 [2021-06-05 18:14:41,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 303.6ms TimeCoverageRelationStatistics Valid=495, Invalid=1397, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:14:42,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154685 states. [2021-06-05 18:14:43,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154685 to 124240. [2021-06-05 18:14:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124240 states, 124238 states have (on average 2.681908916756548) internal successors, (333195), 124239 states have internal predecessors, (333195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124240 states to 124240 states and 333195 transitions. [2021-06-05 18:14:44,096 INFO L78 Accepts]: Start accepts. Automaton has 124240 states and 333195 transitions. Word has length 409 [2021-06-05 18:14:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:44,097 INFO L482 AbstractCegarLoop]: Abstraction has 124240 states and 333195 transitions. [2021-06-05 18:14:44,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 124240 states and 333195 transitions. [2021-06-05 18:14:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:14:44,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:44,251 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:14:44,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:44,451 INFO L430 AbstractCegarLoop]: === Iteration 87 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:44,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:44,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1035510563, now seen corresponding path program 33 times [2021-06-05 18:14:44,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:44,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320894020] [2021-06-05 18:14:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:14:44,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:44,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320894020] [2021-06-05 18:14:44,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320894020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:44,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010187059] [2021-06-05 18:14:44,614 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 18:14:45,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:14:45,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:45,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:45,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:14:45,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010187059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:45,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:45,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:14:45,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58153813] [2021-06-05 18:14:45,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:45,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:45,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:45,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:45,880 INFO L87 Difference]: Start difference. First operand 124240 states and 333195 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:46,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:46,525 INFO L93 Difference]: Finished difference Result 150175 states and 399151 transitions. [2021-06-05 18:14:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:14:46,525 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 409 [2021-06-05 18:14:46,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:46,720 INFO L225 Difference]: With dead ends: 150175 [2021-06-05 18:14:46,720 INFO L226 Difference]: Without dead ends: 150175 [2021-06-05 18:14:46,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 292.8ms TimeCoverageRelationStatistics Valid=506, Invalid=1474, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:14:46,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150175 states. [2021-06-05 18:14:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150175 to 124240. [2021-06-05 18:14:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124240 states, 124238 states have (on average 2.681908916756548) internal successors, (333195), 124239 states have internal predecessors, (333195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124240 states to 124240 states and 333195 transitions. [2021-06-05 18:14:49,009 INFO L78 Accepts]: Start accepts. Automaton has 124240 states and 333195 transitions. Word has length 409 [2021-06-05 18:14:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:49,009 INFO L482 AbstractCegarLoop]: Abstraction has 124240 states and 333195 transitions. [2021-06-05 18:14:49,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 124240 states and 333195 transitions. [2021-06-05 18:14:49,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 18:14:49,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:49,165 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, 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, 1, 1, 1, 1, 1] [2021-06-05 18:14:49,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:49,365 INFO L430 AbstractCegarLoop]: === Iteration 88 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:49,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:49,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1092000953, now seen corresponding path program 34 times [2021-06-05 18:14:49,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:49,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980286064] [2021-06-05 18:14:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:14:49,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:49,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980286064] [2021-06-05 18:14:49,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980286064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:49,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191267233] [2021-06-05 18:14:49,532 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 18:14:50,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:14:50,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:50,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:14:50,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-06-05 18:14:50,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191267233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:50,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:50,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:14:50,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365644491] [2021-06-05 18:14:50,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:14:50,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:50,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:14:50,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:14:50,764 INFO L87 Difference]: Start difference. First operand 124240 states and 333195 transitions. Second operand has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:51,409 INFO L93 Difference]: Finished difference Result 147225 states and 391741 transitions. [2021-06-05 18:14:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:14:51,409 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 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 409 [2021-06-05 18:14:51,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:51,592 INFO L225 Difference]: With dead ends: 147225 [2021-06-05 18:14:51,592 INFO L226 Difference]: Without dead ends: 147225 [2021-06-05 18:14:51,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=517, Invalid=1553, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:14:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147225 states. [2021-06-05 18:14:53,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147225 to 121000. [2021-06-05 18:14:53,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121000 states, 120998 states have (on average 2.6804823220218514) internal successors, (324333), 120999 states have internal predecessors, (324333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:53,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121000 states to 121000 states and 324333 transitions. [2021-06-05 18:14:53,783 INFO L78 Accepts]: Start accepts. Automaton has 121000 states and 324333 transitions. Word has length 409 [2021-06-05 18:14:53,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:53,783 INFO L482 AbstractCegarLoop]: Abstraction has 121000 states and 324333 transitions. [2021-06-05 18:14:53,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.59090909090909) internal successors, (431), 22 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:53,783 INFO L276 IsEmpty]: Start isEmpty. Operand 121000 states and 324333 transitions. [2021-06-05 18:14:53,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-06-05 18:14:53,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:53,935 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, 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 18:14:54,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 18:14:54,135 INFO L430 AbstractCegarLoop]: === Iteration 89 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:54,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:54,136 INFO L82 PathProgramCache]: Analyzing trace with hash 276782368, now seen corresponding path program 11 times [2021-06-05 18:14:54,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:54,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87732080] [2021-06-05 18:14:54,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 33 proven. 2090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:14:54,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:54,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87732080] [2021-06-05 18:14:54,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87732080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:54,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181331769] [2021-06-05 18:14:54,358 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 18:14:54,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:14:54,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:54,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:14:54,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 33 proven. 2090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:14:55,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181331769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:55,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:55,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-06-05 18:14:55,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028541464] [2021-06-05 18:14:55,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:14:55,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:55,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:14:55,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:14:55,072 INFO L87 Difference]: Start difference. First operand 121000 states and 324333 transitions. Second operand has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:56,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:56,129 INFO L93 Difference]: Finished difference Result 134722 states and 359461 transitions. [2021-06-05 18:14:56,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:14:56,130 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 0 states have call successors, (0), 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 439 [2021-06-05 18:14:56,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:56,309 INFO L225 Difference]: With dead ends: 134722 [2021-06-05 18:14:56,309 INFO L226 Difference]: Without dead ends: 134722 [2021-06-05 18:14:56,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 398.2ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:14:56,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134722 states. [2021-06-05 18:14:58,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134722 to 126475. [2021-06-05 18:14:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126475 states, 126473 states have (on average 2.6800107532833093) internal successors, (338949), 126474 states have internal predecessors, (338949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:58,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126475 states to 126475 states and 338949 transitions. [2021-06-05 18:14:58,576 INFO L78 Accepts]: Start accepts. Automaton has 126475 states and 338949 transitions. Word has length 439 [2021-06-05 18:14:58,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:58,576 INFO L482 AbstractCegarLoop]: Abstraction has 126475 states and 338949 transitions. [2021-06-05 18:14:58,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:58,576 INFO L276 IsEmpty]: Start isEmpty. Operand 126475 states and 338949 transitions. [2021-06-05 18:14:58,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:14:58,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:58,736 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, 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, 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 18:14:58,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:58,949 INFO L430 AbstractCegarLoop]: === Iteration 90 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:58,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1055261231, now seen corresponding path program 41 times [2021-06-05 18:14:58,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:58,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348902742] [2021-06-05 18:14:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:14:59,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:59,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348902742] [2021-06-05 18:14:59,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348902742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:59,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862854470] [2021-06-05 18:14:59,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:59,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:14:59,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:59,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:14:59,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1090 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-06-05 18:14:59,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862854470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:59,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:59,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:14:59,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913869580] [2021-06-05 18:14:59,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:14:59,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:59,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:14:59,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:14:59,755 INFO L87 Difference]: Start difference. First operand 126475 states and 338949 transitions. Second operand has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:00,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:00,674 INFO L93 Difference]: Finished difference Result 155910 states and 413159 transitions. [2021-06-05 18:15:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:15:00,675 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 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 442 [2021-06-05 18:15:00,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:00,861 INFO L225 Difference]: With dead ends: 155910 [2021-06-05 18:15:00,861 INFO L226 Difference]: Without dead ends: 155910 [2021-06-05 18:15:00,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 542.3ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:15:01,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155910 states. [2021-06-05 18:15:03,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155910 to 118595. [2021-06-05 18:15:03,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118595 states, 118593 states have (on average 2.6781934852815934) internal successors, (317615), 118594 states have internal predecessors, (317615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:03,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118595 states to 118595 states and 317615 transitions. [2021-06-05 18:15:03,420 INFO L78 Accepts]: Start accepts. Automaton has 118595 states and 317615 transitions. Word has length 442 [2021-06-05 18:15:03,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:03,420 INFO L482 AbstractCegarLoop]: Abstraction has 118595 states and 317615 transitions. [2021-06-05 18:15:03,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:03,420 INFO L276 IsEmpty]: Start isEmpty. Operand 118595 states and 317615 transitions. [2021-06-05 18:15:03,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:15:03,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:03,570 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, 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, 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 18:15:03,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 18:15:03,770 INFO L430 AbstractCegarLoop]: === Iteration 91 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:03,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:03,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1900572889, now seen corresponding path program 42 times [2021-06-05 18:15:03,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:03,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639147817] [2021-06-05 18:15:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:15:03,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:03,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639147817] [2021-06-05 18:15:03,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639147817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:03,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882216595] [2021-06-05 18:15:03,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:15:04,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:15:04,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:04,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:04,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1090 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-06-05 18:15:04,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882216595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:04,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:04,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:15:04,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678936769] [2021-06-05 18:15:04,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:15:04,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:04,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:15:04,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:15:04,752 INFO L87 Difference]: Start difference. First operand 118595 states and 317615 transitions. Second operand has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:05,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:05,696 INFO L93 Difference]: Finished difference Result 173295 states and 460882 transitions. [2021-06-05 18:15:05,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:15:05,697 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 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 442 [2021-06-05 18:15:05,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:05,924 INFO L225 Difference]: With dead ends: 173295 [2021-06-05 18:15:05,924 INFO L226 Difference]: Without dead ends: 173295 [2021-06-05 18:15:05,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:15:06,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173295 states. [2021-06-05 18:15:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173295 to 120755. [2021-06-05 18:15:08,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120755 states, 120753 states have (on average 2.679212938808974) internal successors, (323523), 120754 states have internal predecessors, (323523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120755 states to 120755 states and 323523 transitions. [2021-06-05 18:15:08,359 INFO L78 Accepts]: Start accepts. Automaton has 120755 states and 323523 transitions. Word has length 442 [2021-06-05 18:15:08,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:08,359 INFO L482 AbstractCegarLoop]: Abstraction has 120755 states and 323523 transitions. [2021-06-05 18:15:08,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 120755 states and 323523 transitions. [2021-06-05 18:15:08,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:15:08,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:08,504 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, 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, 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 18:15:08,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:08,705 INFO L430 AbstractCegarLoop]: === Iteration 92 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:08,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:08,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1957063279, now seen corresponding path program 43 times [2021-06-05 18:15:08,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:08,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779571667] [2021-06-05 18:15:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:15:08,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:08,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779571667] [2021-06-05 18:15:08,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779571667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:08,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115056082] [2021-06-05 18:15:08,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:09,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:09,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1090 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-06-05 18:15:09,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115056082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:09,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:09,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:15:09,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573590615] [2021-06-05 18:15:09,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:15:09,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:09,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:15:09,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:15:09,443 INFO L87 Difference]: Start difference. First operand 120755 states and 323523 transitions. Second operand has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:10,370 INFO L93 Difference]: Finished difference Result 167880 states and 446199 transitions. [2021-06-05 18:15:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:15:10,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 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 442 [2021-06-05 18:15:10,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:10,589 INFO L225 Difference]: With dead ends: 167880 [2021-06-05 18:15:10,590 INFO L226 Difference]: Without dead ends: 167880 [2021-06-05 18:15:10,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:15:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167880 states. [2021-06-05 18:15:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167880 to 121835. [2021-06-05 18:15:12,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121835 states, 121833 states have (on average 2.679709110011245) internal successors, (326477), 121834 states have internal predecessors, (326477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121835 states to 121835 states and 326477 transitions. [2021-06-05 18:15:12,992 INFO L78 Accepts]: Start accepts. Automaton has 121835 states and 326477 transitions. Word has length 442 [2021-06-05 18:15:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:12,993 INFO L482 AbstractCegarLoop]: Abstraction has 121835 states and 326477 transitions. [2021-06-05 18:15:12,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:12,993 INFO L276 IsEmpty]: Start isEmpty. Operand 121835 states and 326477 transitions. [2021-06-05 18:15:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:15:13,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:13,135 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, 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, 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 18:15:13,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:13,335 INFO L430 AbstractCegarLoop]: === Iteration 93 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:13,335 INFO L82 PathProgramCache]: Analyzing trace with hash 184607893, now seen corresponding path program 44 times [2021-06-05 18:15:13,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:13,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171530388] [2021-06-05 18:15:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:15:13,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:13,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171530388] [2021-06-05 18:15:13,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171530388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:13,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976104407] [2021-06-05 18:15:13,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:13,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:15:13,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:13,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:13,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1090 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-06-05 18:15:14,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976104407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:14,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:14,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:15:14,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616980484] [2021-06-05 18:15:14,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:15:14,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:14,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:15:14,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:15:14,121 INFO L87 Difference]: Start difference. First operand 121835 states and 326477 transitions. Second operand has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:15,092 INFO L93 Difference]: Finished difference Result 165670 states and 440456 transitions. [2021-06-05 18:15:15,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:15:15,093 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 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 442 [2021-06-05 18:15:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:15,310 INFO L225 Difference]: With dead ends: 165670 [2021-06-05 18:15:15,310 INFO L226 Difference]: Without dead ends: 165670 [2021-06-05 18:15:15,310 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:15:15,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165670 states. [2021-06-05 18:15:17,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165670 to 123655. [2021-06-05 18:15:17,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123655 states, 123653 states have (on average 2.680064373690893) internal successors, (331398), 123654 states have internal predecessors, (331398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123655 states to 123655 states and 331398 transitions. [2021-06-05 18:15:17,858 INFO L78 Accepts]: Start accepts. Automaton has 123655 states and 331398 transitions. Word has length 442 [2021-06-05 18:15:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:17,858 INFO L482 AbstractCegarLoop]: Abstraction has 123655 states and 331398 transitions. [2021-06-05 18:15:17,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:17,859 INFO L276 IsEmpty]: Start isEmpty. Operand 123655 states and 331398 transitions. [2021-06-05 18:15:18,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:15:18,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:18,016 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, 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, 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 18:15:18,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:18,221 INFO L430 AbstractCegarLoop]: === Iteration 94 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:18,221 INFO L82 PathProgramCache]: Analyzing trace with hash 128117503, now seen corresponding path program 45 times [2021-06-05 18:15:18,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:18,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828526979] [2021-06-05 18:15:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:15:18,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:18,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828526979] [2021-06-05 18:15:18,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828526979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:18,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977904350] [2021-06-05 18:15:18,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:18,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:15:18,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:18,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:18,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1090 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-06-05 18:15:19,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977904350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:19,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:19,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:15:19,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152019482] [2021-06-05 18:15:19,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:15:19,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:19,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:15:19,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:15:19,165 INFO L87 Difference]: Start difference. First operand 123655 states and 331398 transitions. Second operand has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:20,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:20,208 INFO L93 Difference]: Finished difference Result 194020 states and 517652 transitions. [2021-06-05 18:15:20,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:15:20,209 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 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 442 [2021-06-05 18:15:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:20,506 INFO L225 Difference]: With dead ends: 194020 [2021-06-05 18:15:20,507 INFO L226 Difference]: Without dead ends: 194020 [2021-06-05 18:15:20,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:15:20,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194020 states. [2021-06-05 18:15:22,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194020 to 127635. [2021-06-05 18:15:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127635 states, 127633 states have (on average 2.68133633151301) internal successors, (342227), 127634 states have internal predecessors, (342227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127635 states to 127635 states and 342227 transitions. [2021-06-05 18:15:23,111 INFO L78 Accepts]: Start accepts. Automaton has 127635 states and 342227 transitions. Word has length 442 [2021-06-05 18:15:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:23,112 INFO L482 AbstractCegarLoop]: Abstraction has 127635 states and 342227 transitions. [2021-06-05 18:15:23,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:23,112 INFO L276 IsEmpty]: Start isEmpty. Operand 127635 states and 342227 transitions. [2021-06-05 18:15:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:15:23,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:23,270 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, 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, 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 18:15:23,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:23,471 INFO L430 AbstractCegarLoop]: === Iteration 95 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:23,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1055194031, now seen corresponding path program 46 times [2021-06-05 18:15:23,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:23,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769662989] [2021-06-05 18:15:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-06-05 18:15:23,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:23,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769662989] [2021-06-05 18:15:23,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769662989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:23,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263602152] [2021-06-05 18:15:23,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:24,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:15:24,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:24,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:24,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:24,760 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:15:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1090 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-06-05 18:15:24,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263602152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:24,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:24,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:15:24,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650816536] [2021-06-05 18:15:24,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:15:24,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:24,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:15:24,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:15:24,823 INFO L87 Difference]: Start difference. First operand 127635 states and 342227 transitions. Second operand has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:25,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:25,475 INFO L93 Difference]: Finished difference Result 166380 states and 442579 transitions. [2021-06-05 18:15:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:15:25,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 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 442 [2021-06-05 18:15:25,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:25,700 INFO L225 Difference]: With dead ends: 166380 [2021-06-05 18:15:25,700 INFO L226 Difference]: Without dead ends: 166380 [2021-06-05 18:15:25,700 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:15:25,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166380 states. [2021-06-05 18:15:27,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166380 to 130535. [2021-06-05 18:15:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130535 states, 130533 states have (on average 2.682095715259743) internal successors, (350102), 130534 states have internal predecessors, (350102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130535 states to 130535 states and 350102 transitions. [2021-06-05 18:15:28,141 INFO L78 Accepts]: Start accepts. Automaton has 130535 states and 350102 transitions. Word has length 442 [2021-06-05 18:15:28,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:28,142 INFO L482 AbstractCegarLoop]: Abstraction has 130535 states and 350102 transitions. [2021-06-05 18:15:28,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.833333333333332) internal successors, (393), 18 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 130535 states and 350102 transitions. [2021-06-05 18:15:28,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-06-05 18:15:28,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:28,306 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, 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, 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 18:15:28,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 18:15:28,506 INFO L430 AbstractCegarLoop]: === Iteration 96 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:28,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:28,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1884208125, now seen corresponding path program 47 times [2021-06-05 18:15:28,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:28,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012778224] [2021-06-05 18:15:28,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:15:28,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:28,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012778224] [2021-06-05 18:15:28,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012778224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:28,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129996461] [2021-06-05 18:15:28,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:28,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:15:28,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:28,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:15:28,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:29,629 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:15:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-06-05 18:15:29,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129996461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:29,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:29,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:15:29,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117103724] [2021-06-05 18:15:29,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:15:29,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:29,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:15:29,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:15:29,929 INFO L87 Difference]: Start difference. First operand 130535 states and 350102 transitions. Second operand has 18 states, 18 states have (on average 21.88888888888889) internal successors, (394), 18 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)