/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-wmm/safe018_tso.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 17:31:56,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 17:31:56,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 17:31:56,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 17:31:56,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 17:31:56,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 17:31:56,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 17:31:56,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 17:31:56,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 17:31:56,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 17:31:56,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 17:31:56,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 17:31:56,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 17:31:56,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 17:31:56,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 17:31:56,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 17:31:56,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-10 17:31:56,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 17:31:56,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 17:31:56,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 17:31:56,675 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 [2021-03-10 17:31:56,699 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 17:31:56,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 17:31:56,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 17:31:56,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 17:31:56,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 17:31:56,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 17:31:56,702 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 17:31:56,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 17:31:56,702 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 17:31:56,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 17:31:56,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 17:31:56,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 17:31:56,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 17:31:56,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 17:31:56,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 17:31:56,704 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 17:31:56,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 17:31:56,704 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 17:31:56,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 17:31:56,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 17:31:56,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 17:31:56,704 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 17:31:56,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 17:31:56,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 17:31:56,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 17:31:56,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 17:31:56,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 17:31:56,705 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 17:31:56,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 17:31:56,705 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 17:31:56,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 17:31:56,706 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 17:31:56,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 17:31:56,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 17:31:56,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 17:31:56,945 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-10 17:31:56,947 INFO L275 PluginConnector]: CDTParser initialized [2021-03-10 17:31:56,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_tso.oepc.i [2021-03-10 17:31:56,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b501253cc/c2a7798a335142079ddb4eda58a329c0/FLAGce7d92377 [2021-03-10 17:31:57,318 INFO L306 CDTParser]: Found 1 translation units. [2021-03-10 17:31:57,318 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_tso.oepc.i [2021-03-10 17:31:57,337 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b501253cc/c2a7798a335142079ddb4eda58a329c0/FLAGce7d92377 [2021-03-10 17:31:57,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b501253cc/c2a7798a335142079ddb4eda58a329c0 [2021-03-10 17:31:57,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 17:31:57,727 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-10 17:31:57,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-10 17:31:57,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-10 17:31:57,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-10 17:31:57,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 05:31:57" (1/1) ... [2021-03-10 17:31:57,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b0f12bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 05:31:57, skipping insertion in model container [2021-03-10 17:31:57,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 05:31:57" (1/1) ... [2021-03-10 17:31:57,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-10 17:31:57,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-10 17:31:57,883 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_tso.oepc.i[950,963] [2021-03-10 17:31:58,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 17:31:58,030 INFO L203 MainTranslator]: Completed pre-run [2021-03-10 17:31:58,038 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_tso.oepc.i[950,963] [2021-03-10 17:31:58,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 17:31:58,122 INFO L208 MainTranslator]: Completed translation [2021-03-10 17:31:58,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 05:31:58 WrapperNode [2021-03-10 17:31:58,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-10 17:31:58,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 17:31:58,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 17:31:58,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 17:31:58,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 05:31:58" (1/1) ... [2021-03-10 17:31:58,155 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 05:31:58" (1/1) ... [2021-03-10 17:31:58,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 17:31:58,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 17:31:58,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 17:31:58,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 17:31:58,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 05:31:58" (1/1) ... [2021-03-10 17:31:58,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 05:31:58" (1/1) ... [2021-03-10 17:31:58,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 05:31:58" (1/1) ... [2021-03-10 17:31:58,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 05:31:58" (1/1) ... [2021-03-10 17:31:58,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 05:31:58" (1/1) ... [2021-03-10 17:31:58,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 05:31:58" (1/1) ... [2021-03-10 17:31:58,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 05:31:58" (1/1) ... [2021-03-10 17:31:58,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 17:31:58,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 17:31:58,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 17:31:58,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 17:31:58,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 05:31:58" (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 [2021-03-10 17:31:58,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-10 17:31:58,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-10 17:31:58,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-10 17:31:58,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-10 17:31:58,267 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-10 17:31:58,268 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-10 17:31:58,268 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-10 17:31:58,268 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-10 17:31:58,268 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-03-10 17:31:58,268 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-03-10 17:31:58,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-10 17:31:58,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-10 17:31:58,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 17:31:58,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 17:31:58,270 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 17:31:58,494 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 17:31:58,494 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-10 17:31:58,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 05:31:58 BoogieIcfgContainer [2021-03-10 17:31:58,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 17:31:58,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 17:31:58,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 17:31:58,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 17:31:58,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.03 05:31:57" (1/3) ... [2021-03-10 17:31:58,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48171ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 05:31:58, skipping insertion in model container [2021-03-10 17:31:58,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 05:31:58" (2/3) ... [2021-03-10 17:31:58,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48171ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 05:31:58, skipping insertion in model container [2021-03-10 17:31:58,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 05:31:58" (3/3) ... [2021-03-10 17:31:58,500 INFO L111 eAbstractionObserver]: Analyzing ICFG safe018_tso.oepc.i [2021-03-10 17:31:58,503 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 17:31:58,503 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 17:31:58,506 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 17:31:58,506 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 17:31:58,525 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,526 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,526 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,526 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,526 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,526 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,526 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,527 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,527 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,527 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,527 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,527 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,527 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,527 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,527 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,528 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,528 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,528 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,528 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,528 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,528 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,528 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,528 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,528 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,529 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,529 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,529 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,529 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,529 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,529 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,529 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,529 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,530 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,530 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,530 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,530 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,532 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,532 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,532 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,532 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,536 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,536 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,536 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,536 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,538 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,538 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,538 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,538 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 17:31:58,543 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 17:31:58,554 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 17:31:58,565 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 17:31:58,566 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 17:31:58,566 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 17:31:58,566 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 17:31:58,566 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 17:31:58,566 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 17:31:58,566 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 17:31:58,566 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 17:31:58,572 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 82 places, 74 transitions, 163 flow [2021-03-10 17:31:58,989 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7566 states, 7564 states have (on average 3.5553939714436806) internal successors, (26893), 7565 states have internal predecessors, (26893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:31:59,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 7566 states, 7564 states have (on average 3.5553939714436806) internal successors, (26893), 7565 states have internal predecessors, (26893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:31:59,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 17:31:59,046 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 17:31:59,046 INFO L519 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] [2021-03-10 17:31:59,047 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 17:31:59,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 17:31:59,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1063022328, now seen corresponding path program 1 times [2021-03-10 17:31:59,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 17:31:59,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377282520] [2021-03-10 17:31:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 17:31:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 17:31:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 17:31:59,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377282520] [2021-03-10 17:31:59,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 17:31:59,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 17:31:59,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518772850] [2021-03-10 17:31:59,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 17:31:59,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 17:31:59,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 17:31:59,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 17:31:59,418 INFO L87 Difference]: Start difference. First operand has 7566 states, 7564 states have (on average 3.5553939714436806) internal successors, (26893), 7565 states have internal predecessors, (26893), 0 states have call successors, (0), 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 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:31:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 17:31:59,646 INFO L93 Difference]: Finished difference Result 10044 states and 34694 transitions. [2021-03-10 17:31:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 17:31:59,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 17:31:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 17:31:59,674 INFO L225 Difference]: With dead ends: 10044 [2021-03-10 17:31:59,674 INFO L226 Difference]: Without dead ends: 3534 [2021-03-10 17:31:59,675 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 17:31:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3534 states. [2021-03-10 17:31:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3534 to 3534. [2021-03-10 17:31:59,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3534 states, 3533 states have (on average 3.376450608547976) internal successors, (11929), 3533 states have internal predecessors, (11929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:31:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3534 states to 3534 states and 11929 transitions. [2021-03-10 17:31:59,878 INFO L78 Accepts]: Start accepts. Automaton has 3534 states and 11929 transitions. Word has length 40 [2021-03-10 17:31:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 17:31:59,879 INFO L480 AbstractCegarLoop]: Abstraction has 3534 states and 11929 transitions. [2021-03-10 17:31:59,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:31:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3534 states and 11929 transitions. [2021-03-10 17:31:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 17:31:59,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 17:31:59,883 INFO L519 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] [2021-03-10 17:31:59,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 17:31:59,884 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 17:31:59,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 17:31:59,884 INFO L82 PathProgramCache]: Analyzing trace with hash -223378985, now seen corresponding path program 1 times [2021-03-10 17:31:59,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 17:31:59,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738924665] [2021-03-10 17:31:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 17:31:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 17:31:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 17:31:59,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738924665] [2021-03-10 17:31:59,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 17:31:59,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 17:31:59,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125895222] [2021-03-10 17:31:59,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 17:31:59,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 17:31:59,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 17:31:59,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 17:31:59,986 INFO L87 Difference]: Start difference. First operand 3534 states and 11929 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 17:32:00,271 INFO L93 Difference]: Finished difference Result 4632 states and 15556 transitions. [2021-03-10 17:32:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 17:32:00,272 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 17:32:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 17:32:00,287 INFO L225 Difference]: With dead ends: 4632 [2021-03-10 17:32:00,288 INFO L226 Difference]: Without dead ends: 3672 [2021-03-10 17:32:00,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-03-10 17:32:00,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-03-10 17:32:00,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 3672. [2021-03-10 17:32:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 3671 states have (on average 3.374012530645601) internal successors, (12386), 3671 states have internal predecessors, (12386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:00,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 12386 transitions. [2021-03-10 17:32:00,397 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 12386 transitions. Word has length 42 [2021-03-10 17:32:00,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 17:32:00,398 INFO L480 AbstractCegarLoop]: Abstraction has 3672 states and 12386 transitions. [2021-03-10 17:32:00,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:00,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 12386 transitions. [2021-03-10 17:32:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 17:32:00,406 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 17:32:00,406 INFO L519 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] [2021-03-10 17:32:00,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 17:32:00,407 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 17:32:00,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 17:32:00,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1224374851, now seen corresponding path program 1 times [2021-03-10 17:32:00,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 17:32:00,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155971852] [2021-03-10 17:32:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 17:32:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 17:32:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 17:32:00,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155971852] [2021-03-10 17:32:00,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 17:32:00,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 17:32:00,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404114061] [2021-03-10 17:32:00,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 17:32:00,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 17:32:00,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 17:32:00,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 17:32:00,535 INFO L87 Difference]: Start difference. First operand 3672 states and 12386 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:00,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 17:32:00,665 INFO L93 Difference]: Finished difference Result 4836 states and 16170 transitions. [2021-03-10 17:32:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 17:32:00,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 17:32:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 17:32:00,674 INFO L225 Difference]: With dead ends: 4836 [2021-03-10 17:32:00,674 INFO L226 Difference]: Without dead ends: 2224 [2021-03-10 17:32:00,675 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-03-10 17:32:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-03-10 17:32:00,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 2224. [2021-03-10 17:32:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 3.2667566351776878) internal successors, (7262), 2223 states have internal predecessors, (7262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:00,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 7262 transitions. [2021-03-10 17:32:00,744 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 7262 transitions. Word has length 43 [2021-03-10 17:32:00,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 17:32:00,744 INFO L480 AbstractCegarLoop]: Abstraction has 2224 states and 7262 transitions. [2021-03-10 17:32:00,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:00,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 7262 transitions. [2021-03-10 17:32:00,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 17:32:00,748 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 17:32:00,748 INFO L519 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] [2021-03-10 17:32:00,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 17:32:00,748 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 17:32:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 17:32:00,748 INFO L82 PathProgramCache]: Analyzing trace with hash 12944947, now seen corresponding path program 1 times [2021-03-10 17:32:00,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 17:32:00,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816307205] [2021-03-10 17:32:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 17:32:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 17:32:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 17:32:00,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816307205] [2021-03-10 17:32:00,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 17:32:00,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 17:32:00,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687725239] [2021-03-10 17:32:00,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 17:32:00,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 17:32:00,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 17:32:00,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 17:32:00,837 INFO L87 Difference]: Start difference. First operand 2224 states and 7262 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 17:32:00,958 INFO L93 Difference]: Finished difference Result 3304 states and 10728 transitions. [2021-03-10 17:32:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 17:32:00,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 17:32:00,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 17:32:00,966 INFO L225 Difference]: With dead ends: 3304 [2021-03-10 17:32:00,966 INFO L226 Difference]: Without dead ends: 1564 [2021-03-10 17:32:00,966 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 17:32:00,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-03-10 17:32:00,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1564. [2021-03-10 17:32:00,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.1541906589891235) internal successors, (4930), 1563 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 4930 transitions. [2021-03-10 17:32:00,997 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 4930 transitions. Word has length 45 [2021-03-10 17:32:00,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 17:32:00,998 INFO L480 AbstractCegarLoop]: Abstraction has 1564 states and 4930 transitions. [2021-03-10 17:32:00,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:00,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 4930 transitions. [2021-03-10 17:32:01,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 17:32:01,001 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 17:32:01,001 INFO L519 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] [2021-03-10 17:32:01,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 17:32:01,001 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 17:32:01,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 17:32:01,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1574785356, now seen corresponding path program 1 times [2021-03-10 17:32:01,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 17:32:01,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470336606] [2021-03-10 17:32:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 17:32:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 17:32:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 17:32:01,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470336606] [2021-03-10 17:32:01,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 17:32:01,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 17:32:01,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638674138] [2021-03-10 17:32:01,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 17:32:01,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 17:32:01,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 17:32:01,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 17:32:01,103 INFO L87 Difference]: Start difference. First operand 1564 states and 4930 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:01,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 17:32:01,204 INFO L93 Difference]: Finished difference Result 2038 states and 6363 transitions. [2021-03-10 17:32:01,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 17:32:01,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 17:32:01,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 17:32:01,210 INFO L225 Difference]: With dead ends: 2038 [2021-03-10 17:32:01,210 INFO L226 Difference]: Without dead ends: 1462 [2021-03-10 17:32:01,210 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 17:32:01,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-03-10 17:32:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1462. [2021-03-10 17:32:01,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.132785763175907) internal successors, (4577), 1461 states have internal predecessors, (4577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 4577 transitions. [2021-03-10 17:32:01,268 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 4577 transitions. Word has length 47 [2021-03-10 17:32:01,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 17:32:01,268 INFO L480 AbstractCegarLoop]: Abstraction has 1462 states and 4577 transitions. [2021-03-10 17:32:01,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:01,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 4577 transitions. [2021-03-10 17:32:01,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-03-10 17:32:01,270 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 17:32:01,271 INFO L519 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] [2021-03-10 17:32:01,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 17:32:01,272 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 17:32:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 17:32:01,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1192920468, now seen corresponding path program 1 times [2021-03-10 17:32:01,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 17:32:01,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544582689] [2021-03-10 17:32:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 17:32:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 17:32:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 17:32:01,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544582689] [2021-03-10 17:32:01,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 17:32:01,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 17:32:01,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631081099] [2021-03-10 17:32:01,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 17:32:01,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 17:32:01,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 17:32:01,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 17:32:01,367 INFO L87 Difference]: Start difference. First operand 1462 states and 4577 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:01,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 17:32:01,460 INFO L93 Difference]: Finished difference Result 1651 states and 5054 transitions. [2021-03-10 17:32:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 17:32:01,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-03-10 17:32:01,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 17:32:01,465 INFO L225 Difference]: With dead ends: 1651 [2021-03-10 17:32:01,465 INFO L226 Difference]: Without dead ends: 1147 [2021-03-10 17:32:01,465 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 17:32:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-03-10 17:32:01,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2021-03-10 17:32:01,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 3.025305410122164) internal successors, (3467), 1146 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:01,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 3467 transitions. [2021-03-10 17:32:01,481 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 3467 transitions. Word has length 48 [2021-03-10 17:32:01,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 17:32:01,481 INFO L480 AbstractCegarLoop]: Abstraction has 1147 states and 3467 transitions. [2021-03-10 17:32:01,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:01,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 3467 transitions. [2021-03-10 17:32:01,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 17:32:01,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 17:32:01,483 INFO L519 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] [2021-03-10 17:32:01,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 17:32:01,483 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 17:32:01,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 17:32:01,483 INFO L82 PathProgramCache]: Analyzing trace with hash 271993918, now seen corresponding path program 1 times [2021-03-10 17:32:01,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 17:32:01,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442161865] [2021-03-10 17:32:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 17:32:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 17:32:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 17:32:01,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442161865] [2021-03-10 17:32:01,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 17:32:01,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 17:32:01,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861860120] [2021-03-10 17:32:01,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 17:32:01,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 17:32:01,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 17:32:01,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 17:32:01,556 INFO L87 Difference]: Start difference. First operand 1147 states and 3467 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 17:32:01,671 INFO L93 Difference]: Finished difference Result 985 states and 2864 transitions. [2021-03-10 17:32:01,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 17:32:01,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 17:32:01,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 17:32:01,685 INFO L225 Difference]: With dead ends: 985 [2021-03-10 17:32:01,685 INFO L226 Difference]: Without dead ends: 661 [2021-03-10 17:32:01,686 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 17:32:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-03-10 17:32:01,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 661. [2021-03-10 17:32:01,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.7984848484848484) internal successors, (1847), 660 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:01,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1847 transitions. [2021-03-10 17:32:01,695 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1847 transitions. Word has length 49 [2021-03-10 17:32:01,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 17:32:01,695 INFO L480 AbstractCegarLoop]: Abstraction has 661 states and 1847 transitions. [2021-03-10 17:32:01,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:01,695 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1847 transitions. [2021-03-10 17:32:01,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 17:32:01,696 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 17:32:01,697 INFO L519 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] [2021-03-10 17:32:01,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 17:32:01,698 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 17:32:01,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 17:32:01,698 INFO L82 PathProgramCache]: Analyzing trace with hash 534744639, now seen corresponding path program 1 times [2021-03-10 17:32:01,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 17:32:01,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402298242] [2021-03-10 17:32:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 17:32:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 17:32:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 17:32:01,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402298242] [2021-03-10 17:32:01,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 17:32:01,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 17:32:01,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452300417] [2021-03-10 17:32:01,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 17:32:01,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 17:32:01,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 17:32:01,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 17:32:01,789 INFO L87 Difference]: Start difference. First operand 661 states and 1847 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:01,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 17:32:01,874 INFO L93 Difference]: Finished difference Result 607 states and 1685 transitions. [2021-03-10 17:32:01,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 17:32:01,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 17:32:01,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 17:32:01,874 INFO L225 Difference]: With dead ends: 607 [2021-03-10 17:32:01,874 INFO L226 Difference]: Without dead ends: 0 [2021-03-10 17:32:01,875 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 17:32:01,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-10 17:32:01,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-10 17:32:01,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:01,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-10 17:32:01,875 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-03-10 17:32:01,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 17:32:01,875 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-10 17:32:01,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 17:32:01,875 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-10 17:32:01,875 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-10 17:32:01,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 17:32:01,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 05:32:01 BasicIcfg [2021-03-10 17:32:01,878 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 17:32:01,879 INFO L168 Benchmark]: Toolchain (without parser) took 4154.43 ms. Allocated memory was 255.9 MB in the beginning and 683.7 MB in the end (delta: 427.8 MB). Free memory was 235.1 MB in the beginning and 426.0 MB in the end (delta: -190.9 MB). Peak memory consumption was 235.3 MB. Max. memory is 16.0 GB. [2021-03-10 17:32:01,879 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 17:32:01,879 INFO L168 Benchmark]: CACSL2BoogieTranslator took 393.93 ms. Allocated memory was 255.9 MB in the beginning and 331.4 MB in the end (delta: 75.5 MB). Free memory was 234.7 MB in the beginning and 294.9 MB in the end (delta: -60.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-03-10 17:32:01,880 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.42 ms. Allocated memory is still 331.4 MB. Free memory was 294.4 MB in the beginning and 292.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 17:32:01,880 INFO L168 Benchmark]: Boogie Preprocessor took 26.09 ms. Allocated memory is still 331.4 MB. Free memory was 292.8 MB in the beginning and 291.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 17:32:01,880 INFO L168 Benchmark]: RCFGBuilder took 297.71 ms. Allocated memory is still 331.4 MB. Free memory was 291.2 MB in the beginning and 269.2 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-03-10 17:32:01,880 INFO L168 Benchmark]: TraceAbstraction took 3382.25 ms. Allocated memory was 331.4 MB in the beginning and 683.7 MB in the end (delta: 352.3 MB). Free memory was 268.7 MB in the beginning and 426.0 MB in the end (delta: -157.3 MB). Peak memory consumption was 197.0 MB. Max. memory is 16.0 GB. [2021-03-10 17:32:01,881 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 393.93 ms. Allocated memory was 255.9 MB in the beginning and 331.4 MB in the end (delta: 75.5 MB). Free memory was 234.7 MB in the beginning and 294.9 MB in the end (delta: -60.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 46.42 ms. Allocated memory is still 331.4 MB. Free memory was 294.4 MB in the beginning and 292.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 26.09 ms. Allocated memory is still 331.4 MB. Free memory was 292.8 MB in the beginning and 291.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 297.71 ms. Allocated memory is still 331.4 MB. Free memory was 291.2 MB in the beginning and 269.2 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3382.25 ms. Allocated memory was 331.4 MB in the beginning and 683.7 MB in the end (delta: 352.3 MB). Free memory was 268.7 MB in the beginning and 426.0 MB in the end (delta: -157.3 MB). Peak memory consumption was 197.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 73 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3311.7ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 78.3ms, AutomataDifference: 1280.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 423.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 713 SDtfs, 1221 SDslu, 2458 SDs, 0 SdLazy, 338 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 218.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 867.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7566occurred in iteration=0, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 486.2ms AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 28.1ms SsaConstructionTime, 196.6ms SatisfiabilityAnalysisTime, 671.6ms InterpolantComputationTime, 365 NumberOfCodeBlocks, 365 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 357 ConstructedInterpolants, 0 QuantifiedInterpolants, 1579 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...