/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 20:09:27,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 20:09:27,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 20:09:27,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 20:09:27,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 20:09:27,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 20:09:27,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 20:09:27,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 20:09:27,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 20:09:27,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 20:09:27,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 20:09:27,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 20:09:27,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 20:09:27,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 20:09:27,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 20:09:27,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 20:09:27,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 20:09:27,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 20:09:27,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 20:09:27,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 20:09:27,625 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 20:09:27,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 20:09:27,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 20:09:27,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 20:09:27,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 20:09:27,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 20:09:27,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 20:09:27,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 20:09:27,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 20:09:27,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 20:09:27,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-17 20:09:27,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 20:09:27,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 20:09:27,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 20:09:27,639 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 20:09:27,657 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 20:09:27,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 20:09:27,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 20:09:27,659 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 20:09:27,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 20:09:27,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 20:09:27,660 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 20:09:27,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 20:09:27,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 20:09:27,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 20:09:27,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 20:09:27,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 20:09:27,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 20:09:27,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 20:09:27,661 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 20:09:27,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 20:09:27,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 20:09:27,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 20:09:27,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 20:09:27,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:09:27,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 20:09:27,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 20:09:27,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 20:09:27,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 20:09:27,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 20:09:27,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 20:09:27,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 20:09:27,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 20:09:27,663 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 20:09:27,663 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 20:09:27,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 20:09:27,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 20:09:27,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 20:09:27,847 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 20:09:27,849 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 20:09:27,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2022-03-17 20:09:27,895 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e25c7a0ba/96e640269d5d47b99d19f295d49c2dee/FLAG3c87de3e7 [2022-03-17 20:09:28,219 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 20:09:28,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2022-03-17 20:09:28,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e25c7a0ba/96e640269d5d47b99d19f295d49c2dee/FLAG3c87de3e7 [2022-03-17 20:09:28,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e25c7a0ba/96e640269d5d47b99d19f295d49c2dee [2022-03-17 20:09:28,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 20:09:28,236 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 20:09:28,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 20:09:28,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 20:09:28,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 20:09:28,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:09:28" (1/1) ... [2022-03-17 20:09:28,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a940e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:09:28, skipping insertion in model container [2022-03-17 20:09:28,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:09:28" (1/1) ... [2022-03-17 20:09:28,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 20:09:28,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 20:09:28,361 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c[465,478] [2022-03-17 20:09:28,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:09:28,377 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 20:09:28,385 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c[465,478] [2022-03-17 20:09:28,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:09:28,398 INFO L208 MainTranslator]: Completed translation [2022-03-17 20:09:28,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:09:28 WrapperNode [2022-03-17 20:09:28,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 20:09:28,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 20:09:28,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 20:09:28,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 20:09:28,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:09:28" (1/1) ... [2022-03-17 20:09:28,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:09:28" (1/1) ... [2022-03-17 20:09:28,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:09:28" (1/1) ... [2022-03-17 20:09:28,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:09:28" (1/1) ... [2022-03-17 20:09:28,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:09:28" (1/1) ... [2022-03-17 20:09:28,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:09:28" (1/1) ... [2022-03-17 20:09:28,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:09:28" (1/1) ... [2022-03-17 20:09:28,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 20:09:28,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 20:09:28,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 20:09:28,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 20:09:28,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:09:28" (1/1) ... [2022-03-17 20:09:28,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:09:28,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:09:28,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 20:09:28,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 20:09:28,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 20:09:28,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 20:09:28,463 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 20:09:28,463 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 20:09:28,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 20:09:28,463 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 20:09:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 20:09:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 20:09:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 20:09:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 20:09:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 20:09:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 20:09:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 20:09:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 20:09:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 20:09:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 20:09:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 20:09:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 20:09:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 20:09:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 20:09:28,508 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 20:09:28,509 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 20:09:28,602 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 20:09:28,606 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 20:09:28,606 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 20:09:28,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:09:28 BoogieIcfgContainer [2022-03-17 20:09:28,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 20:09:28,608 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 20:09:28,608 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 20:09:28,608 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 20:09:28,610 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:09:28" (1/1) ... [2022-03-17 20:09:28,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:09:28 BasicIcfg [2022-03-17 20:09:28,623 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 20:09:28,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 20:09:28,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 20:09:28,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 20:09:28,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 08:09:28" (1/4) ... [2022-03-17 20:09:28,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6fbf91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:09:28, skipping insertion in model container [2022-03-17 20:09:28,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:09:28" (2/4) ... [2022-03-17 20:09:28,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6fbf91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:09:28, skipping insertion in model container [2022-03-17 20:09:28,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:09:28" (3/4) ... [2022-03-17 20:09:28,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6fbf91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:09:28, skipping insertion in model container [2022-03-17 20:09:28,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:09:28" (4/4) ... [2022-03-17 20:09:28,628 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.cqvasr [2022-03-17 20:09:28,631 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 20:09:28,631 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 20:09:28,658 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 20:09:28,662 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 20:09:28,662 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 20:09:28,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 20:09:28,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-17 20:09:28,675 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:09:28,675 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:09:28,676 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:09:28,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:09:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash -414317756, now seen corresponding path program 1 times [2022-03-17 20:09:28,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:09:28,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923485876] [2022-03-17 20:09:28,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:28,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:09:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:28,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:09:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:28,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:09:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:28,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:09:28,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923485876] [2022-03-17 20:09:28,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923485876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:09:28,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:09:28,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 20:09:28,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543153747] [2022-03-17 20:09:28,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:09:28,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 20:09:28,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:09:28,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 20:09:28,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:09:28,866 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:09:28,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:09:28,938 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2022-03-17 20:09:28,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 20:09:28,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-03-17 20:09:28,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:09:28,951 INFO L225 Difference]: With dead ends: 50 [2022-03-17 20:09:28,951 INFO L226 Difference]: Without dead ends: 27 [2022-03-17 20:09:28,953 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:09:28,957 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:09:28,958 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:09:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-17 20:09:28,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-17 20:09:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 20:09:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-03-17 20:09:28,986 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 21 [2022-03-17 20:09:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:09:28,986 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-03-17 20:09:28,986 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:09:28,986 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-03-17 20:09:28,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-17 20:09:28,987 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:09:28,992 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:09:28,993 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 20:09:28,993 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:09:28,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:09:28,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1035089572, now seen corresponding path program 1 times [2022-03-17 20:09:28,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:09:28,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128023042] [2022-03-17 20:09:28,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:28,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:09:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:29,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:09:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:29,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:09:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:29,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:09:29,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128023042] [2022-03-17 20:09:29,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128023042] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:09:29,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:09:29,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:09:29,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83279113] [2022-03-17 20:09:29,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:09:29,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:09:29,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:09:29,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:09:29,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:09:29,091 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:09:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:09:29,186 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-17 20:09:29,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 20:09:29,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-03-17 20:09:29,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:09:29,189 INFO L225 Difference]: With dead ends: 46 [2022-03-17 20:09:29,190 INFO L226 Difference]: Without dead ends: 31 [2022-03-17 20:09:29,191 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:09:29,192 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:09:29,193 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 26 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:09:29,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-17 20:09:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-03-17 20:09:29,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 20:09:29,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-03-17 20:09:29,198 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 21 [2022-03-17 20:09:29,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:09:29,198 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-03-17 20:09:29,199 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:09:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-03-17 20:09:29,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 20:09:29,199 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:09:29,199 INFO L500 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] [2022-03-17 20:09:29,200 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 20:09:29,200 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:09:29,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:09:29,200 INFO L85 PathProgramCache]: Analyzing trace with hash -2124918270, now seen corresponding path program 1 times [2022-03-17 20:09:29,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:09:29,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906960747] [2022-03-17 20:09:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:29,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:09:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:29,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:09:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:29,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:09:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 20:09:29,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:09:29,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906960747] [2022-03-17 20:09:29,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906960747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:09:29,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:09:29,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 20:09:29,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286443600] [2022-03-17 20:09:29,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:09:29,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 20:09:29,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:09:29,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 20:09:29,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 20:09:29,292 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:09:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:09:29,355 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2022-03-17 20:09:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 20:09:29,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-03-17 20:09:29,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:09:29,357 INFO L225 Difference]: With dead ends: 49 [2022-03-17 20:09:29,357 INFO L226 Difference]: Without dead ends: 33 [2022-03-17 20:09:29,357 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 20:09:29,359 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:09:29,359 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 44 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:09:29,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-17 20:09:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-03-17 20:09:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 20:09:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-03-17 20:09:29,366 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2022-03-17 20:09:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:09:29,367 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-03-17 20:09:29,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:09:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-03-17 20:09:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 20:09:29,367 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:09:29,367 INFO L500 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] [2022-03-17 20:09:29,368 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 20:09:29,368 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:09:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:09:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1237414589, now seen corresponding path program 1 times [2022-03-17 20:09:29,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:09:29,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398381697] [2022-03-17 20:09:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:09:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:29,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:09:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:29,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:09:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 20:09:29,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:09:29,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398381697] [2022-03-17 20:09:29,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398381697] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:09:29,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:09:29,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 20:09:29,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976847747] [2022-03-17 20:09:29,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:09:29,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 20:09:29,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:09:29,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 20:09:29,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:09:29,482 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:09:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:09:29,552 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2022-03-17 20:09:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 20:09:29,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-03-17 20:09:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:09:29,554 INFO L225 Difference]: With dead ends: 57 [2022-03-17 20:09:29,554 INFO L226 Difference]: Without dead ends: 40 [2022-03-17 20:09:29,554 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:09:29,555 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:09:29,555 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 37 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:09:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-17 20:09:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-17 20:09:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 32 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 20:09:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-03-17 20:09:29,562 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 24 [2022-03-17 20:09:29,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:09:29,562 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-03-17 20:09:29,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:09:29,563 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-03-17 20:09:29,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 20:09:29,563 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:09:29,563 INFO L500 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] [2022-03-17 20:09:29,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-17 20:09:29,563 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:09:29,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:09:29,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1236491068, now seen corresponding path program 1 times [2022-03-17 20:09:29,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:09:29,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917625785] [2022-03-17 20:09:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:29,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:09:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:29,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:09:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:29,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:09:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:29,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:09:29,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917625785] [2022-03-17 20:09:29,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917625785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:09:29,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831115705] [2022-03-17 20:09:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:29,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:09:29,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:09:29,652 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:09:29,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 20:09:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:29,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 20:09:29,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:09:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:29,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:09:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:29,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831115705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:09:29,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:09:29,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-03-17 20:09:29,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830561694] [2022-03-17 20:09:29,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:09:29,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 20:09:29,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:09:29,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 20:09:29,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-17 20:09:29,889 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:09:30,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:09:30,022 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2022-03-17 20:09:30,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 20:09:30,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 24 [2022-03-17 20:09:30,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:09:30,024 INFO L225 Difference]: With dead ends: 87 [2022-03-17 20:09:30,024 INFO L226 Difference]: Without dead ends: 59 [2022-03-17 20:09:30,025 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-17 20:09:30,025 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:09:30,026 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 30 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:09:30,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-17 20:09:30,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-17 20:09:30,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 50 states have internal predecessors, (67), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 20:09:30,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-03-17 20:09:30,032 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 24 [2022-03-17 20:09:30,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:09:30,033 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-03-17 20:09:30,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:09:30,033 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-03-17 20:09:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 20:09:30,033 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:09:30,034 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:09:30,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 20:09:30,234 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:09:30,234 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:09:30,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:09:30,235 INFO L85 PathProgramCache]: Analyzing trace with hash 575066086, now seen corresponding path program 2 times [2022-03-17 20:09:30,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:09:30,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148144490] [2022-03-17 20:09:30,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:30,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:09:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:30,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:09:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:30,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:09:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:30,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:09:30,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148144490] [2022-03-17 20:09:30,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148144490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:09:30,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116205672] [2022-03-17 20:09:30,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 20:09:30,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:09:30,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:09:30,332 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:09:30,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 20:09:30,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 20:09:30,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:09:30,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 20:09:30,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:09:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-17 20:09:30,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:09:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-17 20:09:30,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116205672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:09:30,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:09:30,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-03-17 20:09:30,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499454733] [2022-03-17 20:09:30,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:09:30,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 20:09:30,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:09:30,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 20:09:30,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-17 20:09:30,515 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 20:09:30,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:09:30,806 INFO L93 Difference]: Finished difference Result 156 states and 216 transitions. [2022-03-17 20:09:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-17 20:09:30,806 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-03-17 20:09:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:09:30,810 INFO L225 Difference]: With dead ends: 156 [2022-03-17 20:09:30,810 INFO L226 Difference]: Without dead ends: 110 [2022-03-17 20:09:30,811 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2022-03-17 20:09:30,812 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 149 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:09:30,812 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 46 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:09:30,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-17 20:09:30,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2022-03-17 20:09:30,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 87 states have (on average 1.3563218390804597) internal successors, (118), 88 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 20:09:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2022-03-17 20:09:30,829 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 33 [2022-03-17 20:09:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:09:30,829 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2022-03-17 20:09:30,830 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 20:09:30,830 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2022-03-17 20:09:30,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 20:09:30,830 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:09:30,830 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:09:30,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 20:09:31,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-17 20:09:31,053 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:09:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:09:31,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1861776890, now seen corresponding path program 1 times [2022-03-17 20:09:31,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:09:31,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305983110] [2022-03-17 20:09:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:31,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:09:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:31,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:09:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:31,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:09:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-17 20:09:31,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:09:31,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305983110] [2022-03-17 20:09:31,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305983110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:09:31,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:09:31,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 20:09:31,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633309150] [2022-03-17 20:09:31,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:09:31,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 20:09:31,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:09:31,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 20:09:31,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 20:09:31,109 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:09:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:09:31,153 INFO L93 Difference]: Finished difference Result 230 states and 311 transitions. [2022-03-17 20:09:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 20:09:31,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-03-17 20:09:31,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:09:31,155 INFO L225 Difference]: With dead ends: 230 [2022-03-17 20:09:31,155 INFO L226 Difference]: Without dead ends: 144 [2022-03-17 20:09:31,155 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 20:09:31,156 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:09:31,156 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 51 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:09:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-17 20:09:31,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 133. [2022-03-17 20:09:31,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 1.3360655737704918) internal successors, (163), 123 states have internal predecessors, (163), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 20:09:31,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 174 transitions. [2022-03-17 20:09:31,166 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 174 transitions. Word has length 39 [2022-03-17 20:09:31,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:09:31,167 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 174 transitions. [2022-03-17 20:09:31,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:09:31,167 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 174 transitions. [2022-03-17 20:09:31,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-17 20:09:31,168 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:09:31,168 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-17 20:09:31,168 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-17 20:09:31,168 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:09:31,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:09:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1666296505, now seen corresponding path program 1 times [2022-03-17 20:09:31,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:09:31,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152819991] [2022-03-17 20:09:31,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:31,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:09:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:31,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:09:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:31,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:09:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 20:09:31,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:09:31,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152819991] [2022-03-17 20:09:31,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152819991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:09:31,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:09:31,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 20:09:31,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852635972] [2022-03-17 20:09:31,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:09:31,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 20:09:31,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:09:31,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 20:09:31,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 20:09:31,196 INFO L87 Difference]: Start difference. First operand 133 states and 174 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:09:31,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:09:31,230 INFO L93 Difference]: Finished difference Result 193 states and 255 transitions. [2022-03-17 20:09:31,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 20:09:31,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2022-03-17 20:09:31,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:09:31,231 INFO L225 Difference]: With dead ends: 193 [2022-03-17 20:09:31,231 INFO L226 Difference]: Without dead ends: 144 [2022-03-17 20:09:31,231 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 20:09:31,232 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:09:31,232 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 48 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:09:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-17 20:09:31,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2022-03-17 20:09:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 126 states have (on average 1.3253968253968254) internal successors, (167), 127 states have internal predecessors, (167), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 20:09:31,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 178 transitions. [2022-03-17 20:09:31,241 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 178 transitions. Word has length 40 [2022-03-17 20:09:31,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:09:31,242 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 178 transitions. [2022-03-17 20:09:31,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:09:31,242 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 178 transitions. [2022-03-17 20:09:31,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-17 20:09:31,242 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:09:31,243 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-17 20:09:31,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-17 20:09:31,243 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:09:31,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:09:31,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1695849177, now seen corresponding path program 1 times [2022-03-17 20:09:31,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:09:31,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885908381] [2022-03-17 20:09:31,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:31,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:09:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:31,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:09:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:31,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:09:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:31,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:09:31,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885908381] [2022-03-17 20:09:31,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885908381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:09:31,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225386500] [2022-03-17 20:09:31,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:31,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:09:31,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:09:31,320 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:09:31,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 20:09:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:31,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 20:09:31,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:09:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:31,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:09:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:31,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225386500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:09:31,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:09:31,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-17 20:09:31,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984529605] [2022-03-17 20:09:31,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:09:31,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 20:09:31,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:09:31,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 20:09:31,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2022-03-17 20:09:31,682 INFO L87 Difference]: Start difference. First operand 137 states and 178 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:09:31,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:09:31,887 INFO L93 Difference]: Finished difference Result 383 states and 545 transitions. [2022-03-17 20:09:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-17 20:09:31,887 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2022-03-17 20:09:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:09:31,888 INFO L225 Difference]: With dead ends: 383 [2022-03-17 20:09:31,888 INFO L226 Difference]: Without dead ends: 258 [2022-03-17 20:09:31,889 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=399, Invalid=723, Unknown=0, NotChecked=0, Total=1122 [2022-03-17 20:09:31,889 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 192 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:09:31,890 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 33 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:09:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-03-17 20:09:31,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2022-03-17 20:09:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 246 states have (on average 1.329268292682927) internal successors, (327), 247 states have internal predecessors, (327), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 20:09:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 338 transitions. [2022-03-17 20:09:31,901 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 338 transitions. Word has length 40 [2022-03-17 20:09:31,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:09:31,901 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 338 transitions. [2022-03-17 20:09:31,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:09:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 338 transitions. [2022-03-17 20:09:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-17 20:09:31,902 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:09:31,903 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:09:31,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 20:09:32,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:09:32,119 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:09:32,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:09:32,119 INFO L85 PathProgramCache]: Analyzing trace with hash 150253017, now seen corresponding path program 2 times [2022-03-17 20:09:32,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:09:32,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677833008] [2022-03-17 20:09:32,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:32,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:09:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:32,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:09:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:32,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:09:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:32,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:09:32,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677833008] [2022-03-17 20:09:32,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677833008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:09:32,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837241064] [2022-03-17 20:09:32,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 20:09:32,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:09:32,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:09:32,300 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:09:32,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 20:09:32,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 20:09:32,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:09:32,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 20:09:32,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:09:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-03-17 20:09:32,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:09:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-03-17 20:09:32,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837241064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:09:32,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:09:32,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 6] total 26 [2022-03-17 20:09:32,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160100118] [2022-03-17 20:09:32,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:09:32,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 20:09:32,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:09:32,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 20:09:32,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2022-03-17 20:09:32,650 INFO L87 Difference]: Start difference. First operand 257 states and 338 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:09:33,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:09:33,646 INFO L93 Difference]: Finished difference Result 1307 states and 1768 transitions. [2022-03-17 20:09:33,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-17 20:09:33,646 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 64 [2022-03-17 20:09:33,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:09:33,649 INFO L225 Difference]: With dead ends: 1307 [2022-03-17 20:09:33,649 INFO L226 Difference]: Without dead ends: 1062 [2022-03-17 20:09:33,651 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1752, Invalid=4568, Unknown=0, NotChecked=0, Total=6320 [2022-03-17 20:09:33,652 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 696 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:09:33,652 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 38 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 20:09:33,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-03-17 20:09:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 524. [2022-03-17 20:09:33,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 507 states have (on average 1.331360946745562) internal successors, (675), 508 states have internal predecessors, (675), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 20:09:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 694 transitions. [2022-03-17 20:09:33,673 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 694 transitions. Word has length 64 [2022-03-17 20:09:33,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:09:33,673 INFO L478 AbstractCegarLoop]: Abstraction has 524 states and 694 transitions. [2022-03-17 20:09:33,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:09:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 694 transitions. [2022-03-17 20:09:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-17 20:09:33,675 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:09:33,675 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:09:33,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 20:09:33,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:09:33,895 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:09:33,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:09:33,896 INFO L85 PathProgramCache]: Analyzing trace with hash -110856328, now seen corresponding path program 1 times [2022-03-17 20:09:33,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:09:33,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290355255] [2022-03-17 20:09:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:33,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:09:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:34,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:09:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:34,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:09:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:34,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:09:34,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290355255] [2022-03-17 20:09:34,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290355255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:09:34,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711398119] [2022-03-17 20:09:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:34,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:09:34,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:09:34,089 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:09:34,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 20:09:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:34,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 20:09:34,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:09:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:34,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:09:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:34,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711398119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:09:34,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:09:34,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 56 [2022-03-17 20:09:34,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776218071] [2022-03-17 20:09:34,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:09:34,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-17 20:09:34,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:09:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-17 20:09:34,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1301, Invalid=1779, Unknown=0, NotChecked=0, Total=3080 [2022-03-17 20:09:34,963 INFO L87 Difference]: Start difference. First operand 524 states and 694 transitions. Second operand has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 55 states have internal predecessors, (172), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:09:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:09:35,642 INFO L93 Difference]: Finished difference Result 3894 states and 5335 transitions. [2022-03-17 20:09:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-17 20:09:35,642 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 55 states have internal predecessors, (172), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 70 [2022-03-17 20:09:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:09:35,651 INFO L225 Difference]: With dead ends: 3894 [2022-03-17 20:09:35,651 INFO L226 Difference]: Without dead ends: 3382 [2022-03-17 20:09:35,653 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1832 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1969, Invalid=3433, Unknown=0, NotChecked=0, Total=5402 [2022-03-17 20:09:35,653 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 385 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:09:35,654 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 33 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 20:09:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2022-03-17 20:09:35,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 1107. [2022-03-17 20:09:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1090 states have (on average 1.3293577981651377) internal successors, (1449), 1091 states have internal predecessors, (1449), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 20:09:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1468 transitions. [2022-03-17 20:09:35,726 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1468 transitions. Word has length 70 [2022-03-17 20:09:35,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:09:35,726 INFO L478 AbstractCegarLoop]: Abstraction has 1107 states and 1468 transitions. [2022-03-17 20:09:35,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 55 states have internal predecessors, (172), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:09:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1468 transitions. [2022-03-17 20:09:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-17 20:09:35,728 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:09:35,728 INFO L500 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:09:35,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 20:09:35,944 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-17 20:09:35,944 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:09:35,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:09:35,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1335274040, now seen corresponding path program 2 times [2022-03-17 20:09:35,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:09:35,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530672232] [2022-03-17 20:09:35,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:35,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:09:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:36,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:09:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:36,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:09:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:36,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:09:36,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530672232] [2022-03-17 20:09:36,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530672232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:09:36,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368372277] [2022-03-17 20:09:36,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 20:09:36,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:09:36,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:09:36,528 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:09:36,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 20:09:36,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 20:09:36,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:09:36,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 20:09:36,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:09:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:37,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:09:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:38,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368372277] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:09:38,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:09:38,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 110 [2022-03-17 20:09:38,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85082848] [2022-03-17 20:09:38,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:09:38,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-17 20:09:38,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:09:38,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-17 20:09:38,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5189, Invalid=6801, Unknown=0, NotChecked=0, Total=11990 [2022-03-17 20:09:38,796 INFO L87 Difference]: Start difference. First operand 1107 states and 1468 transitions. Second operand has 110 states, 110 states have (on average 3.036363636363636) internal successors, (334), 109 states have internal predecessors, (334), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:09:41,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:09:41,118 INFO L93 Difference]: Finished difference Result 7249 states and 9981 transitions. [2022-03-17 20:09:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-17 20:09:41,118 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.036363636363636) internal successors, (334), 109 states have internal predecessors, (334), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 124 [2022-03-17 20:09:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:09:41,132 INFO L225 Difference]: With dead ends: 7249 [2022-03-17 20:09:41,132 INFO L226 Difference]: Without dead ends: 6154 [2022-03-17 20:09:41,137 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7556 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7819, Invalid=13351, Unknown=0, NotChecked=0, Total=21170 [2022-03-17 20:09:41,137 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 762 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 20:09:41,137 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 36 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 20:09:41,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6154 states. [2022-03-17 20:09:41,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6154 to 2295. [2022-03-17 20:09:41,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2278 states have (on average 1.3314310798946445) internal successors, (3033), 2279 states have internal predecessors, (3033), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 20:09:41,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 3052 transitions. [2022-03-17 20:09:41,406 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 3052 transitions. Word has length 124 [2022-03-17 20:09:41,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:09:41,406 INFO L478 AbstractCegarLoop]: Abstraction has 2295 states and 3052 transitions. [2022-03-17 20:09:41,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.036363636363636) internal successors, (334), 109 states have internal predecessors, (334), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:09:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 3052 transitions. [2022-03-17 20:09:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-03-17 20:09:41,408 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:09:41,408 INFO L500 BasicCegarLoop]: trace histogram [70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:09:41,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 20:09:41,624 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:09:41,624 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:09:41,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:09:41,625 INFO L85 PathProgramCache]: Analyzing trace with hash 872046520, now seen corresponding path program 3 times [2022-03-17 20:09:41,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:09:41,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814062594] [2022-03-17 20:09:41,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:41,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:09:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:43,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:09:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:43,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:09:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:43,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:09:43,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814062594] [2022-03-17 20:09:43,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814062594] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:09:43,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501077622] [2022-03-17 20:09:43,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 20:09:43,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:09:43,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:09:43,300 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:09:43,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 20:09:43,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-17 20:09:43,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:09:43,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:09:43,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:09:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 7176 trivial. 0 not checked. [2022-03-17 20:09:43,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:09:43,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501077622] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:09:43,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 20:09:43,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [75] total 79 [2022-03-17 20:09:43,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943118715] [2022-03-17 20:09:43,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:09:43,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 20:09:43,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:09:43,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 20:09:43,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2642, Invalid=3520, Unknown=0, NotChecked=0, Total=6162 [2022-03-17 20:09:43,675 INFO L87 Difference]: Start difference. First operand 2295 states and 3052 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:09:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:09:43,776 INFO L93 Difference]: Finished difference Result 2298 states and 3054 transitions. [2022-03-17 20:09:43,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 20:09:43,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 232 [2022-03-17 20:09:43,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:09:43,780 INFO L225 Difference]: With dead ends: 2298 [2022-03-17 20:09:43,781 INFO L226 Difference]: Without dead ends: 1858 [2022-03-17 20:09:43,783 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2646, Invalid=3674, Unknown=0, NotChecked=0, Total=6320 [2022-03-17 20:09:43,783 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:09:43,783 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 78 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:09:43,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-03-17 20:09:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1857. [2022-03-17 20:09:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1843 states have (on average 1.3298969072164948) internal successors, (2451), 1844 states have internal predecessors, (2451), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 20:09:43,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2466 transitions. [2022-03-17 20:09:43,831 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2466 transitions. Word has length 232 [2022-03-17 20:09:43,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:09:43,832 INFO L478 AbstractCegarLoop]: Abstraction has 1857 states and 2466 transitions. [2022-03-17 20:09:43,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:09:43,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2466 transitions. [2022-03-17 20:09:43,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-03-17 20:09:43,833 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:09:43,833 INFO L500 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:09:43,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-17 20:09:44,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:09:44,047 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:09:44,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:09:44,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1465535191, now seen corresponding path program 1 times [2022-03-17 20:09:44,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:09:44,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785093129] [2022-03-17 20:09:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:44,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:09:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:45,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:09:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:45,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:09:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:45,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:09:45,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785093129] [2022-03-17 20:09:45,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785093129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:09:45,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591986080] [2022-03-17 20:09:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:45,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:09:45,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:09:45,730 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:09:45,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 20:09:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:09:45,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-17 20:09:45,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:09:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:48,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:09:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:09:52,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591986080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:09:52,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:09:52,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 218 [2022-03-17 20:09:52,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299211732] [2022-03-17 20:09:52,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:09:52,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2022-03-17 20:09:52,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:09:52,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2022-03-17 20:09:52,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20741, Invalid=26565, Unknown=0, NotChecked=0, Total=47306 [2022-03-17 20:09:52,926 INFO L87 Difference]: Start difference. First operand 1857 states and 2466 transitions. Second operand has 218 states, 218 states have (on average 3.018348623853211) internal successors, (658), 217 states have internal predecessors, (658), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:09:59,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:09:59,125 INFO L93 Difference]: Finished difference Result 5647 states and 8161 transitions. [2022-03-17 20:09:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-03-17 20:09:59,125 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 3.018348623853211) internal successors, (658), 217 states have internal predecessors, (658), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 232 [2022-03-17 20:09:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:09:59,134 INFO L225 Difference]: With dead ends: 5647 [2022-03-17 20:09:59,135 INFO L226 Difference]: Without dead ends: 3802 [2022-03-17 20:09:59,141 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30668 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=31183, Invalid=52627, Unknown=0, NotChecked=0, Total=83810 [2022-03-17 20:09:59,141 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 1650 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 20:09:59,142 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1651 Valid, 36 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-17 20:09:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2022-03-17 20:09:59,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3801. [2022-03-17 20:09:59,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3787 states have (on average 1.3316609453393187) internal successors, (5043), 3788 states have internal predecessors, (5043), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 20:09:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 5058 transitions. [2022-03-17 20:09:59,258 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 5058 transitions. Word has length 232 [2022-03-17 20:09:59,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:09:59,258 INFO L478 AbstractCegarLoop]: Abstraction has 3801 states and 5058 transitions. [2022-03-17 20:09:59,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 3.018348623853211) internal successors, (658), 217 states have internal predecessors, (658), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:09:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 5058 transitions. [2022-03-17 20:09:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-03-17 20:09:59,263 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:09:59,264 INFO L500 BasicCegarLoop]: trace histogram [142, 142, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:09:59,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 20:09:59,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 20:09:59,471 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:09:59,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:09:59,472 INFO L85 PathProgramCache]: Analyzing trace with hash -638197545, now seen corresponding path program 2 times [2022-03-17 20:09:59,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:09:59,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308915988] [2022-03-17 20:09:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:09:59,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:09:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:10:05,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:10:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:10:05,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:10:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:10:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30175 backedges. 0 proven. 30175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:10:05,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:10:05,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308915988] [2022-03-17 20:10:05,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308915988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:10:05,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602203986] [2022-03-17 20:10:05,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 20:10:05,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:10:05,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:10:05,823 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:10:05,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 20:10:05,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 20:10:05,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:10:05,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 145 conjunts are in the unsatisfiable core [2022-03-17 20:10:05,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:10:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 30175 backedges. 0 proven. 30175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:10:13,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:10:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30175 backedges. 0 proven. 30175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:10:31,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602203986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:10:31,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:10:31,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 146, 146] total 434 [2022-03-17 20:10:31,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060629918] [2022-03-17 20:10:31,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:10:31,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 434 states [2022-03-17 20:10:31,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:10:31,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 434 interpolants. [2022-03-17 20:10:31,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82949, Invalid=104973, Unknown=0, NotChecked=0, Total=187922 [2022-03-17 20:10:31,553 INFO L87 Difference]: Start difference. First operand 3801 states and 5058 transitions. Second operand has 434 states, 434 states have (on average 3.0092165898617513) internal successors, (1306), 433 states have internal predecessors, (1306), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:11:07,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:11:07,452 INFO L93 Difference]: Finished difference Result 11479 states and 16585 transitions. [2022-03-17 20:11:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-03-17 20:11:07,453 INFO L78 Accepts]: Start accepts. Automaton has has 434 states, 434 states have (on average 3.0092165898617513) internal successors, (1306), 433 states have internal predecessors, (1306), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 448 [2022-03-17 20:11:07,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:11:07,472 INFO L225 Difference]: With dead ends: 11479 [2022-03-17 20:11:07,472 INFO L226 Difference]: Without dead ends: 7690 [2022-03-17 20:11:07,490 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1189 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 576 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123548 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=124567, Invalid=208939, Unknown=0, NotChecked=0, Total=333506 [2022-03-17 20:11:07,491 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 3897 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 752 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3898 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 752 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:11:07,492 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3898 Valid, 37 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [752 Valid, 1651 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-17 20:11:07,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7690 states. [2022-03-17 20:11:07,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7690 to 7689. [2022-03-17 20:11:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7689 states, 7675 states have (on average 1.3325081433224755) internal successors, (10227), 7676 states have internal predecessors, (10227), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 20:11:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 10242 transitions. [2022-03-17 20:11:07,668 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 10242 transitions. Word has length 448 [2022-03-17 20:11:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:11:07,669 INFO L478 AbstractCegarLoop]: Abstraction has 7689 states and 10242 transitions. [2022-03-17 20:11:07,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 434 states, 434 states have (on average 3.0092165898617513) internal successors, (1306), 433 states have internal predecessors, (1306), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:11:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 10242 transitions. [2022-03-17 20:11:07,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 881 [2022-03-17 20:11:07,683 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:11:07,683 INFO L500 BasicCegarLoop]: trace histogram [286, 286, 285, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:11:07,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 20:11:07,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-17 20:11:07,900 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:11:07,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:11:07,900 INFO L85 PathProgramCache]: Analyzing trace with hash 878120151, now seen corresponding path program 3 times [2022-03-17 20:11:07,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:11:07,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679829379] [2022-03-17 20:11:07,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:11:07,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:11:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:11:32,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:11:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:11:32,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:11:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:11:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:11:32,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:11:32,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679829379] [2022-03-17 20:11:32,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679829379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:11:32,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804656249] [2022-03-17 20:11:32,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 20:11:32,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:11:32,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:11:32,070 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:11:32,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 20:11:32,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-17 20:11:32,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:11:32,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 20:11:32,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:11:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 856 proven. 0 refuted. 0 times theorem prover too weak. 121695 trivial. 0 not checked. [2022-03-17 20:11:35,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:11:35,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804656249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:11:35,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 20:11:35,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [291] total 298 [2022-03-17 20:11:35,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710362878] [2022-03-17 20:11:35,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:11:35,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 20:11:35,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:11:35,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 20:11:35,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41640, Invalid=46866, Unknown=0, NotChecked=0, Total=88506 [2022-03-17 20:11:35,364 INFO L87 Difference]: Start difference. First operand 7689 states and 10242 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:11:35,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:11:35,719 INFO L93 Difference]: Finished difference Result 10247 states and 13647 transitions. [2022-03-17 20:11:35,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 20:11:35,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 880 [2022-03-17 20:11:35,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:11:35,748 INFO L225 Difference]: With dead ends: 10247 [2022-03-17 20:11:35,748 INFO L226 Difference]: Without dead ends: 10245 [2022-03-17 20:11:35,753 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1173 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=41644, Invalid=47458, Unknown=0, NotChecked=0, Total=89102 [2022-03-17 20:11:35,753 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:11:35,754 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 95 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:11:35,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10245 states. [2022-03-17 20:11:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10245 to 10241. [2022-03-17 20:11:35,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10241 states, 10220 states have (on average 1.3322896281800392) internal successors, (13616), 10224 states have internal predecessors, (13616), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 20:11:36,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10241 states to 10241 states and 13639 transitions. [2022-03-17 20:11:36,004 INFO L78 Accepts]: Start accepts. Automaton has 10241 states and 13639 transitions. Word has length 880 [2022-03-17 20:11:36,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:11:36,005 INFO L478 AbstractCegarLoop]: Abstraction has 10241 states and 13639 transitions. [2022-03-17 20:11:36,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:11:36,005 INFO L276 IsEmpty]: Start isEmpty. Operand 10241 states and 13639 transitions. [2022-03-17 20:11:36,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 881 [2022-03-17 20:11:36,022 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:11:36,022 INFO L500 BasicCegarLoop]: trace histogram [286, 286, 270, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:11:36,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-17 20:11:36,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-17 20:11:36,239 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:11:36,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:11:36,239 INFO L85 PathProgramCache]: Analyzing trace with hash -207718695, now seen corresponding path program 1 times [2022-03-17 20:11:36,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:11:36,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338000946] [2022-03-17 20:11:36,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:11:36,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:11:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:12:00,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:12:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:12:00,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:12:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:12:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:12:00,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:12:00,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338000946] [2022-03-17 20:12:00,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338000946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:12:00,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371204628] [2022-03-17 20:12:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:12:00,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:12:00,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:12:00,249 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:12:00,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 20:12:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:12:00,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 289 conjunts are in the unsatisfiable core [2022-03-17 20:12:00,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:12:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:12:28,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:13:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:13:39,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371204628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:13:39,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:13:39,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [291, 290, 290] total 866 [2022-03-17 20:13:39,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941353131] [2022-03-17 20:13:39,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:13:39,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 866 states [2022-03-17 20:13:39,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:13:39,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 866 interpolants. [2022-03-17 20:13:40,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331781, Invalid=417309, Unknown=0, NotChecked=0, Total=749090 [2022-03-17 20:13:40,010 INFO L87 Difference]: Start difference. First operand 10241 states and 13639 transitions. Second operand has 866 states, 866 states have (on average 3.004618937644342) internal successors, (2602), 865 states have internal predecessors, (2602), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:21:10,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:21:10,268 INFO L93 Difference]: Finished difference Result 28315 states and 41182 transitions. [2022-03-17 20:21:10,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 579 states. [2022-03-17 20:21:10,270 INFO L78 Accepts]: Start accepts. Automaton has has 866 states, 866 states have (on average 3.004618937644342) internal successors, (2602), 865 states have internal predecessors, (2602), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 880 [2022-03-17 20:21:10,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:21:10,312 INFO L225 Difference]: With dead ends: 28315 [2022-03-17 20:21:10,313 INFO L226 Difference]: Without dead ends: 20609 [2022-03-17 20:21:10,417 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2341 GetRequests, 1189 SyntacticMatches, 0 SemanticMatches, 1152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495932 ImplicationChecksByTransitivity, 184.7s TimeCoverageRelationStatistics Valid=497959, Invalid=832603, Unknown=0, NotChecked=0, Total=1330562 [2022-03-17 20:21:10,418 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 6224 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3051 mSolverCounterSat, 888 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6225 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 888 IncrementalHoareTripleChecker+Valid, 3051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:21:10,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6225 Valid, 38 Invalid, 3939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [888 Valid, 3051 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-17 20:21:10,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20609 states. [2022-03-17 20:21:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20609 to 20609. [2022-03-17 20:21:11,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20609 states, 20588 states have (on average 1.332815232174082) internal successors, (27440), 20592 states have internal predecessors, (27440), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 20:21:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20609 states to 20609 states and 27463 transitions. [2022-03-17 20:21:11,048 INFO L78 Accepts]: Start accepts. Automaton has 20609 states and 27463 transitions. Word has length 880 [2022-03-17 20:21:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:21:11,049 INFO L478 AbstractCegarLoop]: Abstraction has 20609 states and 27463 transitions. [2022-03-17 20:21:11,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 866 states, 866 states have (on average 3.004618937644342) internal successors, (2602), 865 states have internal predecessors, (2602), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 20:21:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 20609 states and 27463 transitions. [2022-03-17 20:21:11,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1745 [2022-03-17 20:21:11,071 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:21:11,071 INFO L500 BasicCegarLoop]: trace histogram [574, 574, 558, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:21:11,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 20:21:11,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-17 20:21:11,291 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:21:11,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:21:11,291 INFO L85 PathProgramCache]: Analyzing trace with hash -441769255, now seen corresponding path program 2 times [2022-03-17 20:21:11,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:21:11,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800844009] [2022-03-17 20:21:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:21:11,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:21:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat