/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 06:45:19,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 06:45:19,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 06:45:19,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 06:45:19,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 06:45:19,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 06:45:19,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 06:45:19,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 06:45:19,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 06:45:19,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 06:45:19,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 06:45:19,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 06:45:19,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 06:45:19,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 06:45:19,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 06:45:19,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 06:45:19,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 06:45:19,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 06:45:19,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 06:45:19,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 06:45:19,621 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 06:45:19,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 06:45:19,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 06:45:19,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 06:45:19,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 06:45:19,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 06:45:19,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 06:45:19,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 06:45:19,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 06:45:19,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 06:45:19,643 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 06:45:19,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 06:45:19,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 06:45:19,645 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 06:45:19,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 06:45:19,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 06:45:19,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 06:45:19,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 06:45:19,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 06:45:19,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 06:45:19,646 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 06:45:19,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 06:45:19,647 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 06:45:19,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 06:45:19,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 06:45:19,647 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 06:45:19,647 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 06:45:19,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 06:45:19,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 06:45:19,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 06:45:19,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 06:45:19,648 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 06:45:19,648 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 06:45:19,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 06:45:19,648 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 06:45:19,648 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 06:45:19,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 06:45:19,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 06:45:19,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 06:45:19,902 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 06:45:19,903 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 06:45:19,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c [2022-03-19 06:45:19,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8bdd6607/a93b5aec4b83417e829ad6e8fb4839e3/FLAG4d2a39360 [2022-03-19 06:45:20,521 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 06:45:20,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c [2022-03-19 06:45:20,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8bdd6607/a93b5aec4b83417e829ad6e8fb4839e3/FLAG4d2a39360 [2022-03-19 06:45:20,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8bdd6607/a93b5aec4b83417e829ad6e8fb4839e3 [2022-03-19 06:45:20,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 06:45:20,970 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 06:45:20,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 06:45:20,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 06:45:20,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 06:45:20,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 06:45:20" (1/1) ... [2022-03-19 06:45:20,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e87a480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:20, skipping insertion in model container [2022-03-19 06:45:20,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 06:45:20" (1/1) ... [2022-03-19 06:45:20,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 06:45:21,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 06:45:21,216 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c[2074,2087] [2022-03-19 06:45:21,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 06:45:21,427 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 06:45:21,438 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c[2074,2087] [2022-03-19 06:45:21,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 06:45:21,542 INFO L208 MainTranslator]: Completed translation [2022-03-19 06:45:21,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:21 WrapperNode [2022-03-19 06:45:21,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 06:45:21,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 06:45:21,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 06:45:21,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 06:45:21,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:21" (1/1) ... [2022-03-19 06:45:21,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:21" (1/1) ... [2022-03-19 06:45:21,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:21" (1/1) ... [2022-03-19 06:45:21,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:21" (1/1) ... [2022-03-19 06:45:21,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:21" (1/1) ... [2022-03-19 06:45:21,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:21" (1/1) ... [2022-03-19 06:45:21,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:21" (1/1) ... [2022-03-19 06:45:21,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 06:45:21,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 06:45:21,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 06:45:21,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 06:45:21,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:21" (1/1) ... [2022-03-19 06:45:21,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 06:45:21,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:45:21,697 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) [2022-03-19 06:45:21,707 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 [2022-03-19 06:45:21,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 06:45:21,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 06:45:21,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 06:45:21,740 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-03-19 06:45:21,740 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-03-19 06:45:21,741 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-03-19 06:45:21,741 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-03-19 06:45:21,741 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioStartDevice [2022-03-19 06:45:21,741 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPnp [2022-03-19 06:45:21,741 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioDeviceControl [2022-03-19 06:45:21,742 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-03-19 06:45:21,742 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-03-19 06:45:21,744 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio535DeviceControl [2022-03-19 06:45:21,744 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2022-03-19 06:45:21,745 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio435DeviceControl [2022-03-19 06:45:21,745 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioAtapiDeviceControl [2022-03-19 06:45:21,745 INFO L138 BoogieDeclarations]: Found implementation of procedure HpCdrProcessLastSession [2022-03-19 06:45:21,745 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-03-19 06:45:21,745 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioHPCdrDeviceControl [2022-03-19 06:45:21,745 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-03-19 06:45:21,745 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioUnload [2022-03-19 06:45:21,745 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPower [2022-03-19 06:45:21,745 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-03-19 06:45:21,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 06:45:21,746 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-03-19 06:45:21,746 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-03-19 06:45:21,746 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-03-19 06:45:21,746 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-03-19 06:45:21,746 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-03-19 06:45:21,746 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-03-19 06:45:21,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-03-19 06:45:21,746 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 06:45:21,746 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 06:45:21,747 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 06:45:21,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 06:45:21,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-19 06:45:21,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 06:45:21,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-03-19 06:45:21,747 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-03-19 06:45:21,747 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-03-19 06:45:21,747 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioStartDevice [2022-03-19 06:45:21,747 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPnp [2022-03-19 06:45:21,747 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioDeviceControl [2022-03-19 06:45:21,748 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-03-19 06:45:21,748 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-03-19 06:45:21,748 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio535DeviceControl [2022-03-19 06:45:21,748 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2022-03-19 06:45:21,749 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio435DeviceControl [2022-03-19 06:45:21,749 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioAtapiDeviceControl [2022-03-19 06:45:21,749 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-03-19 06:45:21,749 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioHPCdrDeviceControl [2022-03-19 06:45:21,749 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-03-19 06:45:21,749 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPower [2022-03-19 06:45:21,749 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-03-19 06:45:21,749 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-03-19 06:45:21,749 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-03-19 06:45:21,750 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-03-19 06:45:21,750 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-03-19 06:45:21,750 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-03-19 06:45:21,750 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-03-19 06:45:21,750 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-03-19 06:45:21,750 INFO L130 BoogieDeclarations]: Found specification of procedure HpCdrProcessLastSession [2022-03-19 06:45:21,750 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioUnload [2022-03-19 06:45:21,750 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-03-19 06:45:21,750 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 06:45:21,750 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-03-19 06:45:21,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 06:45:21,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 06:45:21,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 06:45:21,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 06:45:21,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 06:45:21,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 06:45:22,030 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 06:45:22,034 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 06:45:22,150 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:22,227 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-03-19 06:45:22,227 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-03-19 06:45:22,232 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:22,303 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2022-03-19 06:45:22,303 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2022-03-19 06:45:22,349 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:22,368 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-03-19 06:45:22,369 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-03-19 06:45:22,439 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:22,501 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-03-19 06:45:22,501 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: #res := 0; [2022-03-19 06:45:22,501 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-03-19 06:45:22,507 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:22,686 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume false; [2022-03-19 06:45:22,686 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume !false; [2022-03-19 06:45:22,687 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:22,709 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-03-19 06:45:22,710 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-03-19 06:45:22,748 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:22,771 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2022-03-19 06:45:22,772 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2022-03-19 06:45:22,775 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:22,951 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !false; [2022-03-19 06:45:22,951 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume false; [2022-03-19 06:45:22,962 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:22,967 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 06:45:22,967 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 06:45:22,988 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 06:45:23,002 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 06:45:23,003 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 06:45:23,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 06:45:23 BoogieIcfgContainer [2022-03-19 06:45:23,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 06:45:23,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 06:45:23,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 06:45:23,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 06:45:23,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 06:45:20" (1/3) ... [2022-03-19 06:45:23,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f34a9e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 06:45:23, skipping insertion in model container [2022-03-19 06:45:23,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:21" (2/3) ... [2022-03-19 06:45:23,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f34a9e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 06:45:23, skipping insertion in model container [2022-03-19 06:45:23,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 06:45:23" (3/3) ... [2022-03-19 06:45:23,014 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-1.c [2022-03-19 06:45:23,018 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 06:45:23,019 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 06:45:23,058 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 06:45:23,064 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-03-19 06:45:23,064 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 06:45:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 517 states, 383 states have (on average 1.4882506527415145) internal successors, (570), 404 states have internal predecessors, (570), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 98 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-19 06:45:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 06:45:23,111 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:23,111 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] [2022-03-19 06:45:23,112 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:23,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1971492104, now seen corresponding path program 1 times [2022-03-19 06:45:23,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:23,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [694357840] [2022-03-19 06:45:23,137 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:23,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1971492104, now seen corresponding path program 2 times [2022-03-19 06:45:23,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:23,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509367955] [2022-03-19 06:45:23,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:23,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:23,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:23,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:23,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:23,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509367955] [2022-03-19 06:45:23,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509367955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:23,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:23,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:45:23,620 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:23,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [694357840] [2022-03-19 06:45:23,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [694357840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:23,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:23,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:45:23,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064828043] [2022-03-19 06:45:23,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:23,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 06:45:23,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:23,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 06:45:23,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 06:45:23,661 INFO L87 Difference]: Start difference. First operand has 517 states, 383 states have (on average 1.4882506527415145) internal successors, (570), 404 states have internal predecessors, (570), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 98 states have call predecessors, (103), 103 states have call successors, (103) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:45:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:26,333 INFO L93 Difference]: Finished difference Result 1047 states and 1683 transitions. [2022-03-19 06:45:26,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 06:45:26,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 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 20 [2022-03-19 06:45:26,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:26,367 INFO L225 Difference]: With dead ends: 1047 [2022-03-19 06:45:26,367 INFO L226 Difference]: Without dead ends: 665 [2022-03-19 06:45:26,378 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-19 06:45:26,381 INFO L912 BasicCegarLoop]: 741 mSDtfsCounter, 399 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:26,382 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 1013 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1595 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-19 06:45:26,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-03-19 06:45:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 509. [2022-03-19 06:45:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 378 states have (on average 1.4576719576719577) internal successors, (551), 397 states have internal predecessors, (551), 103 states have call successors, (103), 29 states have call predecessors, (103), 27 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2022-03-19 06:45:26,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 740 transitions. [2022-03-19 06:45:26,523 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 740 transitions. Word has length 20 [2022-03-19 06:45:26,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:26,524 INFO L478 AbstractCegarLoop]: Abstraction has 509 states and 740 transitions. [2022-03-19 06:45:26,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:45:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 740 transitions. [2022-03-19 06:45:26,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 06:45:26,525 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:26,526 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, 1] [2022-03-19 06:45:26,526 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 06:45:26,526 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:26,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:26,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1335659000, now seen corresponding path program 1 times [2022-03-19 06:45:26,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:26,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [930473808] [2022-03-19 06:45:26,527 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:26,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1335659000, now seen corresponding path program 2 times [2022-03-19 06:45:26,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:26,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726400120] [2022-03-19 06:45:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:26,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:26,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:26,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:26,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:26,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:26,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726400120] [2022-03-19 06:45:26,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726400120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:26,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:26,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:26,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:26,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [930473808] [2022-03-19 06:45:26,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [930473808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:26,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:26,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:26,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657066134] [2022-03-19 06:45:26,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:26,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 06:45:26,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:26,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 06:45:26,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 06:45:26,685 INFO L87 Difference]: Start difference. First operand 509 states and 740 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 06:45:28,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:28,489 INFO L93 Difference]: Finished difference Result 967 states and 1429 transitions. [2022-03-19 06:45:28,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 06:45:28,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-03-19 06:45:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:28,498 INFO L225 Difference]: With dead ends: 967 [2022-03-19 06:45:28,498 INFO L226 Difference]: Without dead ends: 846 [2022-03-19 06:45:28,499 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:45:28,500 INFO L912 BasicCegarLoop]: 853 mSDtfsCounter, 1498 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:28,501 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1025 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 06:45:28,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-03-19 06:45:28,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 664. [2022-03-19 06:45:28,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 502 states have (on average 1.408366533864542) internal successors, (707), 510 states have internal predecessors, (707), 112 states have call successors, (112), 40 states have call predecessors, (112), 49 states have return successors, (145), 119 states have call predecessors, (145), 99 states have call successors, (145) [2022-03-19 06:45:28,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 964 transitions. [2022-03-19 06:45:28,600 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 964 transitions. Word has length 25 [2022-03-19 06:45:28,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:28,601 INFO L478 AbstractCegarLoop]: Abstraction has 664 states and 964 transitions. [2022-03-19 06:45:28,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 06:45:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 964 transitions. [2022-03-19 06:45:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 06:45:28,609 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:28,609 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, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:28,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 06:45:28,609 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:28,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:28,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2015725837, now seen corresponding path program 1 times [2022-03-19 06:45:28,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:28,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [952595349] [2022-03-19 06:45:28,614 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:28,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2015725837, now seen corresponding path program 2 times [2022-03-19 06:45:28,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:28,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327361932] [2022-03-19 06:45:28,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:28,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:28,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:28,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:28,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:28,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:28,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327361932] [2022-03-19 06:45:28,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327361932] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:28,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:28,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:28,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:28,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [952595349] [2022-03-19 06:45:28,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [952595349] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:28,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:28,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:28,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512064068] [2022-03-19 06:45:28,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:28,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 06:45:28,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:28,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 06:45:28,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 06:45:28,780 INFO L87 Difference]: Start difference. First operand 664 states and 964 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 06:45:30,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:30,246 INFO L93 Difference]: Finished difference Result 1148 states and 1650 transitions. [2022-03-19 06:45:30,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 06:45:30,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-03-19 06:45:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:30,258 INFO L225 Difference]: With dead ends: 1148 [2022-03-19 06:45:30,258 INFO L226 Difference]: Without dead ends: 970 [2022-03-19 06:45:30,260 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:45:30,261 INFO L912 BasicCegarLoop]: 725 mSDtfsCounter, 1529 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1539 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:30,262 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1539 Valid, 867 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 06:45:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-03-19 06:45:30,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 789. [2022-03-19 06:45:30,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 611 states have (on average 1.4042553191489362) internal successors, (858), 615 states have internal predecessors, (858), 114 states have call successors, (114), 46 states have call predecessors, (114), 63 states have return successors, (163), 130 states have call predecessors, (163), 104 states have call successors, (163) [2022-03-19 06:45:30,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1135 transitions. [2022-03-19 06:45:30,353 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1135 transitions. Word has length 30 [2022-03-19 06:45:30,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:30,353 INFO L478 AbstractCegarLoop]: Abstraction has 789 states and 1135 transitions. [2022-03-19 06:45:30,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 06:45:30,354 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1135 transitions. [2022-03-19 06:45:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 06:45:30,355 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:30,355 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:30,356 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 06:45:30,356 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:30,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:30,356 INFO L85 PathProgramCache]: Analyzing trace with hash -994008456, now seen corresponding path program 1 times [2022-03-19 06:45:30,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:30,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1888229145] [2022-03-19 06:45:30,357 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:30,357 INFO L85 PathProgramCache]: Analyzing trace with hash -994008456, now seen corresponding path program 2 times [2022-03-19 06:45:30,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:30,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627925257] [2022-03-19 06:45:30,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:30,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:30,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:30,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:30,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:30,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:30,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627925257] [2022-03-19 06:45:30,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627925257] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:30,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:30,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:30,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:30,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1888229145] [2022-03-19 06:45:30,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1888229145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:30,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:30,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:30,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930926043] [2022-03-19 06:45:30,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:30,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 06:45:30,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:30,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 06:45:30,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 06:45:30,514 INFO L87 Difference]: Start difference. First operand 789 states and 1135 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 06:45:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:32,769 INFO L93 Difference]: Finished difference Result 1630 states and 2449 transitions. [2022-03-19 06:45:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 06:45:32,769 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-03-19 06:45:32,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:32,780 INFO L225 Difference]: With dead ends: 1630 [2022-03-19 06:45:32,780 INFO L226 Difference]: Without dead ends: 1344 [2022-03-19 06:45:32,784 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:45:32,787 INFO L912 BasicCegarLoop]: 1009 mSDtfsCounter, 1111 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:32,788 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 1265 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 06:45:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-03-19 06:45:32,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 907. [2022-03-19 06:45:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 708 states have (on average 1.4138418079096045) internal successors, (1001), 711 states have internal predecessors, (1001), 127 states have call successors, (127), 54 states have call predecessors, (127), 71 states have return successors, (220), 144 states have call predecessors, (220), 117 states have call successors, (220) [2022-03-19 06:45:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1348 transitions. [2022-03-19 06:45:32,935 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1348 transitions. Word has length 31 [2022-03-19 06:45:32,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:32,935 INFO L478 AbstractCegarLoop]: Abstraction has 907 states and 1348 transitions. [2022-03-19 06:45:32,935 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 06:45:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1348 transitions. [2022-03-19 06:45:32,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 06:45:32,937 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:32,937 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:32,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 06:45:32,937 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:32,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:32,938 INFO L85 PathProgramCache]: Analyzing trace with hash -987884657, now seen corresponding path program 1 times [2022-03-19 06:45:32,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:32,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1668021376] [2022-03-19 06:45:32,939 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:32,939 INFO L85 PathProgramCache]: Analyzing trace with hash -987884657, now seen corresponding path program 2 times [2022-03-19 06:45:32,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:32,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020593470] [2022-03-19 06:45:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:32,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:33,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:33,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:33,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:33,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:33,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020593470] [2022-03-19 06:45:33,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020593470] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:33,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:33,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:45:33,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:33,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1668021376] [2022-03-19 06:45:33,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1668021376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:33,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:33,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:45:33,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018812526] [2022-03-19 06:45:33,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:33,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 06:45:33,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:33,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 06:45:33,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-19 06:45:33,173 INFO L87 Difference]: Start difference. First operand 907 states and 1348 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:45:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:35,434 INFO L93 Difference]: Finished difference Result 1632 states and 2483 transitions. [2022-03-19 06:45:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:45:35,435 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2022-03-19 06:45:35,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:35,442 INFO L225 Difference]: With dead ends: 1632 [2022-03-19 06:45:35,443 INFO L226 Difference]: Without dead ends: 1046 [2022-03-19 06:45:35,446 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:45:35,447 INFO L912 BasicCegarLoop]: 743 mSDtfsCounter, 3353 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 1182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3359 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1182 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:35,447 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3359 Valid, 890 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1182 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 06:45:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-03-19 06:45:35,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 835. [2022-03-19 06:45:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 649 states have (on average 1.399075500770416) internal successors, (908), 653 states have internal predecessors, (908), 118 states have call successors, (118), 50 states have call predecessors, (118), 67 states have return successors, (177), 134 states have call predecessors, (177), 108 states have call successors, (177) [2022-03-19 06:45:35,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1203 transitions. [2022-03-19 06:45:35,605 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1203 transitions. Word has length 32 [2022-03-19 06:45:35,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:35,606 INFO L478 AbstractCegarLoop]: Abstraction has 835 states and 1203 transitions. [2022-03-19 06:45:35,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:45:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1203 transitions. [2022-03-19 06:45:35,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 06:45:35,610 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:35,610 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:35,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 06:45:35,610 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:35,611 INFO L85 PathProgramCache]: Analyzing trace with hash 450252455, now seen corresponding path program 1 times [2022-03-19 06:45:35,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:35,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1536330049] [2022-03-19 06:45:35,611 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:35,612 INFO L85 PathProgramCache]: Analyzing trace with hash 450252455, now seen corresponding path program 2 times [2022-03-19 06:45:35,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:35,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741169325] [2022-03-19 06:45:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:35,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:35,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:35,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:35,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:35,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:35,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741169325] [2022-03-19 06:45:35,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741169325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:35,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:35,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:35,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:35,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1536330049] [2022-03-19 06:45:35,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1536330049] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:35,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:35,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:35,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393814581] [2022-03-19 06:45:35,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:35,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 06:45:35,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:35,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 06:45:35,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 06:45:35,759 INFO L87 Difference]: Start difference. First operand 835 states and 1203 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 06:45:37,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:37,596 INFO L93 Difference]: Finished difference Result 965 states and 1425 transitions. [2022-03-19 06:45:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 06:45:37,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-03-19 06:45:37,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:37,606 INFO L225 Difference]: With dead ends: 965 [2022-03-19 06:45:37,606 INFO L226 Difference]: Without dead ends: 961 [2022-03-19 06:45:37,607 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-19 06:45:37,608 INFO L912 BasicCegarLoop]: 713 mSDtfsCounter, 771 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:37,608 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 982 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 06:45:37,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-03-19 06:45:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 834. [2022-03-19 06:45:37,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 649 states have (on average 1.3959938366718028) internal successors, (906), 652 states have internal predecessors, (906), 117 states have call successors, (117), 50 states have call predecessors, (117), 67 states have return successors, (177), 134 states have call predecessors, (177), 108 states have call successors, (177) [2022-03-19 06:45:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1200 transitions. [2022-03-19 06:45:37,728 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1200 transitions. Word has length 36 [2022-03-19 06:45:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:37,729 INFO L478 AbstractCegarLoop]: Abstraction has 834 states and 1200 transitions. [2022-03-19 06:45:37,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 06:45:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1200 transitions. [2022-03-19 06:45:37,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 06:45:37,730 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:37,730 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:37,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 06:45:37,731 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:37,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:37,732 INFO L85 PathProgramCache]: Analyzing trace with hash -783054808, now seen corresponding path program 1 times [2022-03-19 06:45:37,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:37,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1436029601] [2022-03-19 06:45:37,733 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash -783054808, now seen corresponding path program 2 times [2022-03-19 06:45:37,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:37,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310696813] [2022-03-19 06:45:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:37,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:37,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:37,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:37,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:37,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:37,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:37,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310696813] [2022-03-19 06:45:37,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310696813] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:37,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:37,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:45:37,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:37,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1436029601] [2022-03-19 06:45:37,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1436029601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:37,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:37,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:45:37,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229612302] [2022-03-19 06:45:37,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:37,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 06:45:37,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:37,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 06:45:37,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-19 06:45:37,933 INFO L87 Difference]: Start difference. First operand 834 states and 1200 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 06:45:39,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:39,934 INFO L93 Difference]: Finished difference Result 1417 states and 2024 transitions. [2022-03-19 06:45:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:45:39,935 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-03-19 06:45:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:39,941 INFO L225 Difference]: With dead ends: 1417 [2022-03-19 06:45:39,942 INFO L226 Difference]: Without dead ends: 999 [2022-03-19 06:45:39,943 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-19 06:45:39,944 INFO L912 BasicCegarLoop]: 821 mSDtfsCounter, 1494 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:39,944 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1496 Valid, 1252 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 06:45:39,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-03-19 06:45:40,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 736. [2022-03-19 06:45:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 571 states have (on average 1.3870402802101576) internal successors, (792), 575 states have internal predecessors, (792), 106 states have call successors, (106), 45 states have call predecessors, (106), 58 states have return successors, (131), 118 states have call predecessors, (131), 97 states have call successors, (131) [2022-03-19 06:45:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1029 transitions. [2022-03-19 06:45:40,060 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1029 transitions. Word has length 39 [2022-03-19 06:45:40,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:40,060 INFO L478 AbstractCegarLoop]: Abstraction has 736 states and 1029 transitions. [2022-03-19 06:45:40,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 06:45:40,061 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1029 transitions. [2022-03-19 06:45:40,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 06:45:40,063 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:40,063 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:40,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-19 06:45:40,063 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:40,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:40,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1815790808, now seen corresponding path program 1 times [2022-03-19 06:45:40,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:40,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1728980250] [2022-03-19 06:45:40,064 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:40,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1815790808, now seen corresponding path program 2 times [2022-03-19 06:45:40,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:40,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958368630] [2022-03-19 06:45:40,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:40,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:40,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:40,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:40,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:40,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:40,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958368630] [2022-03-19 06:45:40,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958368630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:40,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:40,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:40,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:40,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1728980250] [2022-03-19 06:45:40,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1728980250] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:40,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:40,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:40,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038648337] [2022-03-19 06:45:40,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:40,222 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 06:45:40,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:40,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 06:45:40,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 06:45:40,223 INFO L87 Difference]: Start difference. First operand 736 states and 1029 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 06:45:42,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:42,008 INFO L93 Difference]: Finished difference Result 979 states and 1409 transitions. [2022-03-19 06:45:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 06:45:42,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-03-19 06:45:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:42,019 INFO L225 Difference]: With dead ends: 979 [2022-03-19 06:45:42,019 INFO L226 Difference]: Without dead ends: 959 [2022-03-19 06:45:42,020 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:45:42,021 INFO L912 BasicCegarLoop]: 672 mSDtfsCounter, 1124 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:42,021 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 773 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 06:45:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-03-19 06:45:42,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 762. [2022-03-19 06:45:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 595 states have (on average 1.3983193277310924) internal successors, (832), 608 states have internal predecessors, (832), 108 states have call successors, (108), 48 states have call predecessors, (108), 58 states have return successors, (124), 110 states have call predecessors, (124), 100 states have call successors, (124) [2022-03-19 06:45:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1064 transitions. [2022-03-19 06:45:42,150 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1064 transitions. Word has length 40 [2022-03-19 06:45:42,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:42,152 INFO L478 AbstractCegarLoop]: Abstraction has 762 states and 1064 transitions. [2022-03-19 06:45:42,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 06:45:42,152 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1064 transitions. [2022-03-19 06:45:42,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 06:45:42,155 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:42,155 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:42,156 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-19 06:45:42,156 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:42,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:42,156 INFO L85 PathProgramCache]: Analyzing trace with hash 737122156, now seen corresponding path program 1 times [2022-03-19 06:45:42,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:42,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1708510155] [2022-03-19 06:45:42,157 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:42,157 INFO L85 PathProgramCache]: Analyzing trace with hash 737122156, now seen corresponding path program 2 times [2022-03-19 06:45:42,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:42,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941618243] [2022-03-19 06:45:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:42,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:42,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:42,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:42,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:42,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 06:45:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:42,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:42,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941618243] [2022-03-19 06:45:42,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941618243] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:42,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:42,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:45:42,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:42,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1708510155] [2022-03-19 06:45:42,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1708510155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:42,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:42,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:45:42,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133938961] [2022-03-19 06:45:42,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:42,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 06:45:42,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:42,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 06:45:42,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-19 06:45:42,306 INFO L87 Difference]: Start difference. First operand 762 states and 1064 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 7 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 06:45:43,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:43,722 INFO L93 Difference]: Finished difference Result 1167 states and 1671 transitions. [2022-03-19 06:45:43,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 06:45:43,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 7 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-03-19 06:45:43,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:43,727 INFO L225 Difference]: With dead ends: 1167 [2022-03-19 06:45:43,728 INFO L226 Difference]: Without dead ends: 942 [2022-03-19 06:45:43,729 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-19 06:45:43,730 INFO L912 BasicCegarLoop]: 791 mSDtfsCounter, 1663 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1669 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:43,730 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1669 Valid, 1318 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 06:45:43,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-03-19 06:45:43,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 762. [2022-03-19 06:45:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 595 states have (on average 1.3966386554621848) internal successors, (831), 608 states have internal predecessors, (831), 108 states have call successors, (108), 48 states have call predecessors, (108), 58 states have return successors, (124), 110 states have call predecessors, (124), 100 states have call successors, (124) [2022-03-19 06:45:43,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1063 transitions. [2022-03-19 06:45:43,869 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1063 transitions. Word has length 46 [2022-03-19 06:45:43,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:43,869 INFO L478 AbstractCegarLoop]: Abstraction has 762 states and 1063 transitions. [2022-03-19 06:45:43,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 7 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 06:45:43,870 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1063 transitions. [2022-03-19 06:45:43,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 06:45:43,872 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:43,872 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:43,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-19 06:45:43,873 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:43,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:43,873 INFO L85 PathProgramCache]: Analyzing trace with hash 8107196, now seen corresponding path program 1 times [2022-03-19 06:45:43,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:43,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [761405844] [2022-03-19 06:45:43,874 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:43,874 INFO L85 PathProgramCache]: Analyzing trace with hash 8107196, now seen corresponding path program 2 times [2022-03-19 06:45:43,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:43,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017373885] [2022-03-19 06:45:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:43,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:43,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:43,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:43,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:43,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 06:45:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:43,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:43,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017373885] [2022-03-19 06:45:43,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017373885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:43,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:43,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:45:43,998 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:43,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [761405844] [2022-03-19 06:45:43,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [761405844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:43,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:43,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:45:43,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475568772] [2022-03-19 06:45:43,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:43,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 06:45:43,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:43,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 06:45:43,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-19 06:45:43,999 INFO L87 Difference]: Start difference. First operand 762 states and 1063 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 06:45:45,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:45,419 INFO L93 Difference]: Finished difference Result 964 states and 1383 transitions. [2022-03-19 06:45:45,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 06:45:45,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-03-19 06:45:45,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:45,424 INFO L225 Difference]: With dead ends: 964 [2022-03-19 06:45:45,425 INFO L226 Difference]: Without dead ends: 897 [2022-03-19 06:45:45,425 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:45:45,426 INFO L912 BasicCegarLoop]: 667 mSDtfsCounter, 1507 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:45,426 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1513 Valid, 1140 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 06:45:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-03-19 06:45:45,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 751. [2022-03-19 06:45:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 588 states have (on average 1.3979591836734695) internal successors, (822), 601 states have internal predecessors, (822), 106 states have call successors, (106), 46 states have call predecessors, (106), 56 states have return successors, (122), 108 states have call predecessors, (122), 98 states have call successors, (122) [2022-03-19 06:45:45,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1050 transitions. [2022-03-19 06:45:45,590 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1050 transitions. Word has length 47 [2022-03-19 06:45:45,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:45,590 INFO L478 AbstractCegarLoop]: Abstraction has 751 states and 1050 transitions. [2022-03-19 06:45:45,590 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 06:45:45,591 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1050 transitions. [2022-03-19 06:45:45,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 06:45:45,593 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:45,593 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:45,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-19 06:45:45,594 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:45,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:45,597 INFO L85 PathProgramCache]: Analyzing trace with hash -776493065, now seen corresponding path program 1 times [2022-03-19 06:45:45,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:45,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1178389456] [2022-03-19 06:45:45,597 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:45,597 INFO L85 PathProgramCache]: Analyzing trace with hash -776493065, now seen corresponding path program 2 times [2022-03-19 06:45:45,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:45,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082194152] [2022-03-19 06:45:45,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:45,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:45,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:45,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:45,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:45,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 06:45:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:45,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:45:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:45,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:45,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082194152] [2022-03-19 06:45:45,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082194152] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:45,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:45,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:45:45,813 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:45,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1178389456] [2022-03-19 06:45:45,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1178389456] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:45,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:45,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:45:45,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160237309] [2022-03-19 06:45:45,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:45,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 06:45:45,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 06:45:45,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-19 06:45:45,815 INFO L87 Difference]: Start difference. First operand 751 states and 1050 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 7 states have internal predecessors, (36), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 06:45:48,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:48,420 INFO L93 Difference]: Finished difference Result 1067 states and 1515 transitions. [2022-03-19 06:45:48,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 06:45:48,420 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 7 states have internal predecessors, (36), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2022-03-19 06:45:48,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:48,425 INFO L225 Difference]: With dead ends: 1067 [2022-03-19 06:45:48,425 INFO L226 Difference]: Without dead ends: 1006 [2022-03-19 06:45:48,426 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-03-19 06:45:48,426 INFO L912 BasicCegarLoop]: 766 mSDtfsCounter, 1821 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 2666 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1849 SdHoareTripleChecker+Valid, 1768 SdHoareTripleChecker+Invalid, 3251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 2666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:48,427 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1849 Valid, 1768 Invalid, 3251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 2666 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 06:45:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-03-19 06:45:48,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 794. [2022-03-19 06:45:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 623 states have (on average 1.3964686998394864) internal successors, (870), 635 states have internal predecessors, (870), 110 states have call successors, (110), 49 states have call predecessors, (110), 60 states have return successors, (131), 114 states have call predecessors, (131), 102 states have call successors, (131) [2022-03-19 06:45:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1111 transitions. [2022-03-19 06:45:48,616 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1111 transitions. Word has length 48 [2022-03-19 06:45:48,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:48,616 INFO L478 AbstractCegarLoop]: Abstraction has 794 states and 1111 transitions. [2022-03-19 06:45:48,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 7 states have internal predecessors, (36), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 06:45:48,616 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1111 transitions. [2022-03-19 06:45:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 06:45:48,618 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:48,618 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:48,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-19 06:45:48,619 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:48,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:48,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1944299410, now seen corresponding path program 1 times [2022-03-19 06:45:48,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:48,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [733569047] [2022-03-19 06:45:48,620 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1944299410, now seen corresponding path program 2 times [2022-03-19 06:45:48,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:48,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708323275] [2022-03-19 06:45:48,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:48,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:48,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:48,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:48,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:48,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 06:45:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:48,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:45:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:48,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:48,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708323275] [2022-03-19 06:45:48,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708323275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:48,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:48,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:45:48,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:48,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [733569047] [2022-03-19 06:45:48,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [733569047] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:48,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:48,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:45:48,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988695128] [2022-03-19 06:45:48,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:48,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:45:48,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:48,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:45:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:45:48,820 INFO L87 Difference]: Start difference. First operand 794 states and 1111 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 06:45:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:51,128 INFO L93 Difference]: Finished difference Result 952 states and 1368 transitions. [2022-03-19 06:45:51,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 06:45:51,128 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-03-19 06:45:51,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:51,132 INFO L225 Difference]: With dead ends: 952 [2022-03-19 06:45:51,132 INFO L226 Difference]: Without dead ends: 924 [2022-03-19 06:45:51,133 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-03-19 06:45:51,133 INFO L912 BasicCegarLoop]: 652 mSDtfsCounter, 1180 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 2204 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 2204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:51,134 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1191 Valid, 1456 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 2204 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 06:45:51,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-03-19 06:45:51,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 797. [2022-03-19 06:45:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 626 states have (on average 1.3961661341853036) internal successors, (874), 638 states have internal predecessors, (874), 110 states have call successors, (110), 49 states have call predecessors, (110), 60 states have return successors, (131), 114 states have call predecessors, (131), 102 states have call successors, (131) [2022-03-19 06:45:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1115 transitions. [2022-03-19 06:45:51,290 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1115 transitions. Word has length 50 [2022-03-19 06:45:51,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:51,291 INFO L478 AbstractCegarLoop]: Abstraction has 797 states and 1115 transitions. [2022-03-19 06:45:51,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 06:45:51,291 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1115 transitions. [2022-03-19 06:45:51,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 06:45:51,293 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:51,293 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:51,293 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-19 06:45:51,294 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:51,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:51,294 INFO L85 PathProgramCache]: Analyzing trace with hash -49845296, now seen corresponding path program 1 times [2022-03-19 06:45:51,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:51,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1783135692] [2022-03-19 06:45:51,295 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:51,295 INFO L85 PathProgramCache]: Analyzing trace with hash -49845296, now seen corresponding path program 2 times [2022-03-19 06:45:51,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:51,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376923260] [2022-03-19 06:45:51,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:51,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:51,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:51,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:51,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:51,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 06:45:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:51,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:45:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:51,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:51,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376923260] [2022-03-19 06:45:51,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376923260] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:51,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:51,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:45:51,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:51,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1783135692] [2022-03-19 06:45:51,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1783135692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:51,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:51,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:45:51,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899021547] [2022-03-19 06:45:51,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:51,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:45:51,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:51,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:45:51,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:45:51,483 INFO L87 Difference]: Start difference. First operand 797 states and 1115 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 06:45:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:54,000 INFO L93 Difference]: Finished difference Result 978 states and 1402 transitions. [2022-03-19 06:45:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:45:54,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2022-03-19 06:45:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:54,004 INFO L225 Difference]: With dead ends: 978 [2022-03-19 06:45:54,005 INFO L226 Difference]: Without dead ends: 914 [2022-03-19 06:45:54,005 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:45:54,006 INFO L912 BasicCegarLoop]: 652 mSDtfsCounter, 1576 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 2993 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 3404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:54,006 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 1818 Invalid, 3404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2993 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 06:45:54,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-03-19 06:45:54,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 792. [2022-03-19 06:45:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 621 states have (on average 1.391304347826087) internal successors, (864), 633 states have internal predecessors, (864), 110 states have call successors, (110), 49 states have call predecessors, (110), 60 states have return successors, (131), 114 states have call predecessors, (131), 102 states have call successors, (131) [2022-03-19 06:45:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1105 transitions. [2022-03-19 06:45:54,160 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1105 transitions. Word has length 50 [2022-03-19 06:45:54,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:54,161 INFO L478 AbstractCegarLoop]: Abstraction has 792 states and 1105 transitions. [2022-03-19 06:45:54,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 06:45:54,161 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1105 transitions. [2022-03-19 06:45:54,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 06:45:54,164 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:54,164 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:54,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-19 06:45:54,164 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:54,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:54,165 INFO L85 PathProgramCache]: Analyzing trace with hash 96847506, now seen corresponding path program 1 times [2022-03-19 06:45:54,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:54,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1205304188] [2022-03-19 06:45:54,165 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:54,165 INFO L85 PathProgramCache]: Analyzing trace with hash 96847506, now seen corresponding path program 2 times [2022-03-19 06:45:54,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:54,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167439746] [2022-03-19 06:45:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:54,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:54,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:54,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:54,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:54,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 06:45:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:54,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:45:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:54,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:54,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167439746] [2022-03-19 06:45:54,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167439746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:54,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:54,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:45:54,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:54,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1205304188] [2022-03-19 06:45:54,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1205304188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:54,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:54,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:45:54,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559226621] [2022-03-19 06:45:54,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:54,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 06:45:54,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 06:45:54,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-19 06:45:54,316 INFO L87 Difference]: Start difference. First operand 792 states and 1105 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 06:45:55,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:55,733 INFO L93 Difference]: Finished difference Result 1090 states and 1555 transitions. [2022-03-19 06:45:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 06:45:55,734 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 50 [2022-03-19 06:45:55,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:55,739 INFO L225 Difference]: With dead ends: 1090 [2022-03-19 06:45:55,739 INFO L226 Difference]: Without dead ends: 1074 [2022-03-19 06:45:55,740 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:45:55,740 INFO L912 BasicCegarLoop]: 799 mSDtfsCounter, 890 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:55,741 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 1338 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 06:45:55,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-03-19 06:45:55,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 848. [2022-03-19 06:45:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 663 states have (on average 1.3725490196078431) internal successors, (910), 677 states have internal predecessors, (910), 112 states have call successors, (112), 51 states have call predecessors, (112), 72 states have return successors, (143), 126 states have call predecessors, (143), 104 states have call successors, (143) [2022-03-19 06:45:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1165 transitions. [2022-03-19 06:45:55,938 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1165 transitions. Word has length 50 [2022-03-19 06:45:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:55,938 INFO L478 AbstractCegarLoop]: Abstraction has 848 states and 1165 transitions. [2022-03-19 06:45:55,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 06:45:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1165 transitions. [2022-03-19 06:45:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 06:45:55,941 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:55,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:55,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-19 06:45:55,941 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:55,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:55,942 INFO L85 PathProgramCache]: Analyzing trace with hash 637282241, now seen corresponding path program 1 times [2022-03-19 06:45:55,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:55,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [801678259] [2022-03-19 06:45:55,942 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:55,942 INFO L85 PathProgramCache]: Analyzing trace with hash 637282241, now seen corresponding path program 2 times [2022-03-19 06:45:55,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:55,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330395193] [2022-03-19 06:45:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:55,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:56,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:56,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:56,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:56,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:45:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:56,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:45:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:56,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:56,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:56,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330395193] [2022-03-19 06:45:56,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330395193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:56,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:56,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:45:56,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:56,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [801678259] [2022-03-19 06:45:56,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [801678259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:56,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:56,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:45:56,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168456060] [2022-03-19 06:45:56,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:56,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 06:45:56,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:56,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 06:45:56,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-19 06:45:56,126 INFO L87 Difference]: Start difference. First operand 848 states and 1165 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 06:45:57,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:57,501 INFO L93 Difference]: Finished difference Result 996 states and 1410 transitions. [2022-03-19 06:45:57,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 06:45:57,501 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2022-03-19 06:45:57,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:57,505 INFO L225 Difference]: With dead ends: 996 [2022-03-19 06:45:57,506 INFO L226 Difference]: Without dead ends: 991 [2022-03-19 06:45:57,506 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:45:57,507 INFO L912 BasicCegarLoop]: 697 mSDtfsCounter, 1190 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:57,507 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 1168 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 06:45:57,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-03-19 06:45:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 867. [2022-03-19 06:45:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 679 states have (on average 1.369661266568483) internal successors, (930), 694 states have internal predecessors, (930), 113 states have call successors, (113), 52 states have call predecessors, (113), 74 states have return successors, (145), 128 states have call predecessors, (145), 105 states have call successors, (145) [2022-03-19 06:45:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1188 transitions. [2022-03-19 06:45:57,673 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1188 transitions. Word has length 52 [2022-03-19 06:45:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:57,674 INFO L478 AbstractCegarLoop]: Abstraction has 867 states and 1188 transitions. [2022-03-19 06:45:57,675 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 06:45:57,675 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1188 transitions. [2022-03-19 06:45:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 06:45:57,677 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:57,677 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:57,677 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-19 06:45:57,678 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:57,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:57,678 INFO L85 PathProgramCache]: Analyzing trace with hash 708397377, now seen corresponding path program 1 times [2022-03-19 06:45:57,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:57,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [803527927] [2022-03-19 06:45:57,678 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:57,679 INFO L85 PathProgramCache]: Analyzing trace with hash 708397377, now seen corresponding path program 2 times [2022-03-19 06:45:57,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:57,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700652235] [2022-03-19 06:45:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:57,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:57,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:57,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:57,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:57,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 06:45:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:57,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 06:45:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:57,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:57,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700652235] [2022-03-19 06:45:57,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700652235] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:57,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:57,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:45:57,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:57,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [803527927] [2022-03-19 06:45:57,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [803527927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:57,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:57,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:45:57,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678192016] [2022-03-19 06:45:57,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:57,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 06:45:57,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:57,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 06:45:57,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:45:57,827 INFO L87 Difference]: Start difference. First operand 867 states and 1188 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 06:45:59,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:59,986 INFO L93 Difference]: Finished difference Result 1203 states and 1692 transitions. [2022-03-19 06:45:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:45:59,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 54 [2022-03-19 06:45:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:59,991 INFO L225 Difference]: With dead ends: 1203 [2022-03-19 06:45:59,991 INFO L226 Difference]: Without dead ends: 956 [2022-03-19 06:45:59,992 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-03-19 06:45:59,993 INFO L912 BasicCegarLoop]: 641 mSDtfsCounter, 700 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:59,993 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 1175 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 06:45:59,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-03-19 06:46:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 836. [2022-03-19 06:46:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 655 states have (on average 1.369465648854962) internal successors, (897), 668 states have internal predecessors, (897), 111 states have call successors, (111), 51 states have call predecessors, (111), 69 states have return successors, (140), 123 states have call predecessors, (140), 104 states have call successors, (140) [2022-03-19 06:46:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1148 transitions. [2022-03-19 06:46:00,216 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1148 transitions. Word has length 54 [2022-03-19 06:46:00,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:00,216 INFO L478 AbstractCegarLoop]: Abstraction has 836 states and 1148 transitions. [2022-03-19 06:46:00,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 06:46:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1148 transitions. [2022-03-19 06:46:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 06:46:00,219 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:00,219 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:00,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-19 06:46:00,219 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:00,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:00,220 INFO L85 PathProgramCache]: Analyzing trace with hash -848829632, now seen corresponding path program 1 times [2022-03-19 06:46:00,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:00,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [910711102] [2022-03-19 06:46:00,220 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:00,220 INFO L85 PathProgramCache]: Analyzing trace with hash -848829632, now seen corresponding path program 2 times [2022-03-19 06:46:00,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:00,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822865125] [2022-03-19 06:46:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:00,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:00,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:00,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:00,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:00,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 06:46:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:00,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:00,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:00,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822865125] [2022-03-19 06:46:00,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822865125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:00,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:00,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:46:00,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:00,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [910711102] [2022-03-19 06:46:00,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [910711102] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:00,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:00,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:46:00,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565002252] [2022-03-19 06:46:00,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:00,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:46:00,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:00,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:46:00,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:46:00,406 INFO L87 Difference]: Start difference. First operand 836 states and 1148 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 06:46:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:02,455 INFO L93 Difference]: Finished difference Result 971 states and 1378 transitions. [2022-03-19 06:46:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 06:46:02,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 51 [2022-03-19 06:46:02,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:02,458 INFO L225 Difference]: With dead ends: 971 [2022-03-19 06:46:02,458 INFO L226 Difference]: Without dead ends: 967 [2022-03-19 06:46:02,459 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:46:02,459 INFO L912 BasicCegarLoop]: 706 mSDtfsCounter, 735 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 3512 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 2358 SdHoareTripleChecker+Invalid, 3789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 3512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:02,459 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 2358 Invalid, 3789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 3512 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 06:46:02,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-03-19 06:46:02,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 843. [2022-03-19 06:46:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 661 states have (on average 1.367624810892587) internal successors, (904), 675 states have internal predecessors, (904), 112 states have call successors, (112), 51 states have call predecessors, (112), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-03-19 06:46:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1157 transitions. [2022-03-19 06:46:02,661 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1157 transitions. Word has length 51 [2022-03-19 06:46:02,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:02,661 INFO L478 AbstractCegarLoop]: Abstraction has 843 states and 1157 transitions. [2022-03-19 06:46:02,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 06:46:02,662 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1157 transitions. [2022-03-19 06:46:02,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 06:46:02,664 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:02,664 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:02,664 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-19 06:46:02,665 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:02,665 INFO L85 PathProgramCache]: Analyzing trace with hash -849106462, now seen corresponding path program 1 times [2022-03-19 06:46:02,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:02,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [824793389] [2022-03-19 06:46:02,665 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:02,665 INFO L85 PathProgramCache]: Analyzing trace with hash -849106462, now seen corresponding path program 2 times [2022-03-19 06:46:02,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:02,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36653794] [2022-03-19 06:46:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:02,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:02,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:02,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:02,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:02,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 06:46:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:02,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:02,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:02,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36653794] [2022-03-19 06:46:02,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36653794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:02,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:02,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:46:02,877 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:02,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [824793389] [2022-03-19 06:46:02,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [824793389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:02,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:02,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:46:02,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7433396] [2022-03-19 06:46:02,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:02,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:46:02,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:02,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:46:02,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:46:02,879 INFO L87 Difference]: Start difference. First operand 843 states and 1157 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 06:46:05,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:05,267 INFO L93 Difference]: Finished difference Result 986 states and 1394 transitions. [2022-03-19 06:46:05,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:46:05,268 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 51 [2022-03-19 06:46:05,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:05,272 INFO L225 Difference]: With dead ends: 986 [2022-03-19 06:46:05,272 INFO L226 Difference]: Without dead ends: 962 [2022-03-19 06:46:05,273 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:46:05,273 INFO L912 BasicCegarLoop]: 708 mSDtfsCounter, 737 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 3842 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 2458 SdHoareTripleChecker+Invalid, 4119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 3842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:05,273 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 2458 Invalid, 4119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 3842 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 06:46:05,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-03-19 06:46:05,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 842. [2022-03-19 06:46:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 660 states have (on average 1.3666666666666667) internal successors, (902), 674 states have internal predecessors, (902), 112 states have call successors, (112), 51 states have call predecessors, (112), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-03-19 06:46:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1155 transitions. [2022-03-19 06:46:05,460 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1155 transitions. Word has length 51 [2022-03-19 06:46:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:05,460 INFO L478 AbstractCegarLoop]: Abstraction has 842 states and 1155 transitions. [2022-03-19 06:46:05,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 06:46:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1155 transitions. [2022-03-19 06:46:05,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 06:46:05,463 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:05,463 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:05,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-19 06:46:05,463 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:05,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:05,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1275498861, now seen corresponding path program 1 times [2022-03-19 06:46:05,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:05,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2031298197] [2022-03-19 06:46:05,464 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:05,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1275498861, now seen corresponding path program 2 times [2022-03-19 06:46:05,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:05,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741777316] [2022-03-19 06:46:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:05,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:05,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:05,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:05,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:05,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:05,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:05,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:05,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:05,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741777316] [2022-03-19 06:46:05,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741777316] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:05,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:05,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:46:05,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:05,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2031298197] [2022-03-19 06:46:05,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2031298197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:05,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:05,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:46:05,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617822601] [2022-03-19 06:46:05,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:05,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:46:05,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:05,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:46:05,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:46:05,794 INFO L87 Difference]: Start difference. First operand 842 states and 1155 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 06:46:07,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:08,000 INFO L93 Difference]: Finished difference Result 974 states and 1378 transitions. [2022-03-19 06:46:08,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:46:08,000 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2022-03-19 06:46:08,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:08,003 INFO L225 Difference]: With dead ends: 974 [2022-03-19 06:46:08,003 INFO L226 Difference]: Without dead ends: 968 [2022-03-19 06:46:08,004 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:46:08,004 INFO L912 BasicCegarLoop]: 659 mSDtfsCounter, 2613 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 2027 mSolverCounterSat, 912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2639 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 2027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:08,004 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2639 Valid, 1383 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [912 Valid, 2027 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 06:46:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-03-19 06:46:08,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 842. [2022-03-19 06:46:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 660 states have (on average 1.3651515151515152) internal successors, (901), 674 states have internal predecessors, (901), 112 states have call successors, (112), 51 states have call predecessors, (112), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-03-19 06:46:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1154 transitions. [2022-03-19 06:46:08,227 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1154 transitions. Word has length 53 [2022-03-19 06:46:08,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:08,228 INFO L478 AbstractCegarLoop]: Abstraction has 842 states and 1154 transitions. [2022-03-19 06:46:08,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 06:46:08,228 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1154 transitions. [2022-03-19 06:46:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 06:46:08,230 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:08,230 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:08,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-19 06:46:08,230 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:08,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:08,231 INFO L85 PathProgramCache]: Analyzing trace with hash -204304198, now seen corresponding path program 1 times [2022-03-19 06:46:08,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:08,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [586237544] [2022-03-19 06:46:08,231 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:08,231 INFO L85 PathProgramCache]: Analyzing trace with hash -204304198, now seen corresponding path program 2 times [2022-03-19 06:46:08,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:08,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401281738] [2022-03-19 06:46:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:08,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:08,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:08,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:08,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:08,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 06:46:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:08,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:08,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:08,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401281738] [2022-03-19 06:46:08,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401281738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:08,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:08,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:46:08,390 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:08,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [586237544] [2022-03-19 06:46:08,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [586237544] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:08,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:08,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:46:08,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607708648] [2022-03-19 06:46:08,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:08,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 06:46:08,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:08,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 06:46:08,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-19 06:46:08,391 INFO L87 Difference]: Start difference. First operand 842 states and 1154 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 06:46:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:10,570 INFO L93 Difference]: Finished difference Result 979 states and 1383 transitions. [2022-03-19 06:46:10,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 06:46:10,570 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2022-03-19 06:46:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:10,574 INFO L225 Difference]: With dead ends: 979 [2022-03-19 06:46:10,574 INFO L226 Difference]: Without dead ends: 943 [2022-03-19 06:46:10,575 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-03-19 06:46:10,575 INFO L912 BasicCegarLoop]: 659 mSDtfsCounter, 1565 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1580 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:10,575 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1580 Valid, 1284 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 06:46:10,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-03-19 06:46:10,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 815. [2022-03-19 06:46:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 638 states have (on average 1.3746081504702194) internal successors, (877), 651 states have internal predecessors, (877), 109 states have call successors, (109), 49 states have call predecessors, (109), 67 states have return successors, (138), 121 states have call predecessors, (138), 102 states have call successors, (138) [2022-03-19 06:46:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1124 transitions. [2022-03-19 06:46:10,789 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1124 transitions. Word has length 52 [2022-03-19 06:46:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:10,790 INFO L478 AbstractCegarLoop]: Abstraction has 815 states and 1124 transitions. [2022-03-19 06:46:10,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 06:46:10,790 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1124 transitions. [2022-03-19 06:46:10,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 06:46:10,792 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:10,792 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:10,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-19 06:46:10,792 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:10,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:10,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1517780378, now seen corresponding path program 1 times [2022-03-19 06:46:10,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:10,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [256715592] [2022-03-19 06:46:10,793 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:10,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1517780378, now seen corresponding path program 2 times [2022-03-19 06:46:10,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:10,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755478691] [2022-03-19 06:46:10,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:10,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:10,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:10,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:10,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:10,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:11,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:11,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:11,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:11,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755478691] [2022-03-19 06:46:11,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755478691] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:11,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:11,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:46:11,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:11,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [256715592] [2022-03-19 06:46:11,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [256715592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:11,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:11,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:46:11,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956548752] [2022-03-19 06:46:11,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:11,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:46:11,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:11,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:46:11,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:46:11,058 INFO L87 Difference]: Start difference. First operand 815 states and 1124 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 06:46:13,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:13,489 INFO L93 Difference]: Finished difference Result 945 states and 1345 transitions. [2022-03-19 06:46:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:46:13,490 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2022-03-19 06:46:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:13,492 INFO L225 Difference]: With dead ends: 945 [2022-03-19 06:46:13,492 INFO L226 Difference]: Without dead ends: 939 [2022-03-19 06:46:13,493 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:46:13,493 INFO L912 BasicCegarLoop]: 630 mSDtfsCounter, 2544 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 901 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2570 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 3454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 901 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:13,493 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2570 Valid, 1558 Invalid, 3454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [901 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-19 06:46:13,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-03-19 06:46:13,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 815. [2022-03-19 06:46:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 638 states have (on average 1.3730407523510972) internal successors, (876), 651 states have internal predecessors, (876), 109 states have call successors, (109), 49 states have call predecessors, (109), 67 states have return successors, (138), 121 states have call predecessors, (138), 102 states have call successors, (138) [2022-03-19 06:46:13,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1123 transitions. [2022-03-19 06:46:13,689 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1123 transitions. Word has length 54 [2022-03-19 06:46:13,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:13,689 INFO L478 AbstractCegarLoop]: Abstraction has 815 states and 1123 transitions. [2022-03-19 06:46:13,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 06:46:13,689 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1123 transitions. [2022-03-19 06:46:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 06:46:13,691 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:13,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:13,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-19 06:46:13,691 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:13,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:13,692 INFO L85 PathProgramCache]: Analyzing trace with hash 505594524, now seen corresponding path program 1 times [2022-03-19 06:46:13,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:13,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [149792927] [2022-03-19 06:46:13,692 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:13,692 INFO L85 PathProgramCache]: Analyzing trace with hash 505594524, now seen corresponding path program 2 times [2022-03-19 06:46:13,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:13,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256856048] [2022-03-19 06:46:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:13,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:13,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:13,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256856048] [2022-03-19 06:46:13,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256856048] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:13,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:13,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:46:13,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:13,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [149792927] [2022-03-19 06:46:13,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [149792927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:13,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:13,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:46:13,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100929402] [2022-03-19 06:46:13,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:13,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 06:46:13,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:13,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 06:46:13,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:46:13,911 INFO L87 Difference]: Start difference. First operand 815 states and 1123 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 06:46:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:16,448 INFO L93 Difference]: Finished difference Result 966 states and 1372 transitions. [2022-03-19 06:46:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 06:46:16,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2022-03-19 06:46:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:16,453 INFO L225 Difference]: With dead ends: 966 [2022-03-19 06:46:16,453 INFO L226 Difference]: Without dead ends: 926 [2022-03-19 06:46:16,454 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:46:16,455 INFO L912 BasicCegarLoop]: 678 mSDtfsCounter, 1069 mSDsluCounter, 1798 mSDsCounter, 0 mSdLazyCounter, 4451 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 4889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 4451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:16,455 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 2476 Invalid, 4889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 4451 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 06:46:16,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-03-19 06:46:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 806. [2022-03-19 06:46:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 631 states have (on average 1.3565768621236134) internal successors, (856), 644 states have internal predecessors, (856), 107 states have call successors, (107), 49 states have call predecessors, (107), 67 states have return successors, (136), 119 states have call predecessors, (136), 100 states have call successors, (136) [2022-03-19 06:46:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1099 transitions. [2022-03-19 06:46:16,648 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1099 transitions. Word has length 55 [2022-03-19 06:46:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:16,648 INFO L478 AbstractCegarLoop]: Abstraction has 806 states and 1099 transitions. [2022-03-19 06:46:16,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 06:46:16,648 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1099 transitions. [2022-03-19 06:46:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 06:46:16,650 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:16,650 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:16,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-19 06:46:16,651 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:16,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:16,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1791275328, now seen corresponding path program 1 times [2022-03-19 06:46:16,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:16,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1177892923] [2022-03-19 06:46:16,652 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:16,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1791275328, now seen corresponding path program 2 times [2022-03-19 06:46:16,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:16,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521991348] [2022-03-19 06:46:16,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:16,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-19 06:46:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:16,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:16,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521991348] [2022-03-19 06:46:16,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521991348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:16,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:16,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:46:16,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:16,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1177892923] [2022-03-19 06:46:16,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1177892923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:16,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:16,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:46:16,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494778046] [2022-03-19 06:46:16,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:16,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 06:46:16,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:16,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 06:46:16,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:46:16,905 INFO L87 Difference]: Start difference. First operand 806 states and 1099 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 06:46:19,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:19,776 INFO L93 Difference]: Finished difference Result 942 states and 1326 transitions. [2022-03-19 06:46:19,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 06:46:19,776 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) Word has length 56 [2022-03-19 06:46:19,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:19,780 INFO L225 Difference]: With dead ends: 942 [2022-03-19 06:46:19,780 INFO L226 Difference]: Without dead ends: 924 [2022-03-19 06:46:19,781 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:46:19,782 INFO L912 BasicCegarLoop]: 660 mSDtfsCounter, 978 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 5067 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 5471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 5067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:19,782 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 2682 Invalid, 5471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 5067 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-19 06:46:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-03-19 06:46:20,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 804. [2022-03-19 06:46:20,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 630 states have (on average 1.3555555555555556) internal successors, (854), 643 states have internal predecessors, (854), 106 states have call successors, (106), 49 states have call predecessors, (106), 67 states have return successors, (135), 118 states have call predecessors, (135), 99 states have call successors, (135) [2022-03-19 06:46:20,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1095 transitions. [2022-03-19 06:46:20,034 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1095 transitions. Word has length 56 [2022-03-19 06:46:20,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:20,035 INFO L478 AbstractCegarLoop]: Abstraction has 804 states and 1095 transitions. [2022-03-19 06:46:20,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 06:46:20,035 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1095 transitions. [2022-03-19 06:46:20,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 06:46:20,037 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:20,038 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:20,038 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-19 06:46:20,038 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:20,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:20,038 INFO L85 PathProgramCache]: Analyzing trace with hash 388427064, now seen corresponding path program 1 times [2022-03-19 06:46:20,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:20,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1415434677] [2022-03-19 06:46:20,039 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:20,039 INFO L85 PathProgramCache]: Analyzing trace with hash 388427064, now seen corresponding path program 2 times [2022-03-19 06:46:20,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:20,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414654573] [2022-03-19 06:46:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:20,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-19 06:46:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:20,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:20,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414654573] [2022-03-19 06:46:20,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414654573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:20,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:20,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:46:20,311 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:20,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1415434677] [2022-03-19 06:46:20,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1415434677] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:20,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:20,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:46:20,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712005598] [2022-03-19 06:46:20,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:20,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 06:46:20,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:20,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 06:46:20,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:46:20,312 INFO L87 Difference]: Start difference. First operand 804 states and 1095 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 06:46:22,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:22,681 INFO L93 Difference]: Finished difference Result 937 states and 1319 transitions. [2022-03-19 06:46:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 06:46:22,682 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-03-19 06:46:22,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:22,700 INFO L225 Difference]: With dead ends: 937 [2022-03-19 06:46:22,700 INFO L226 Difference]: Without dead ends: 919 [2022-03-19 06:46:22,700 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:46:22,701 INFO L912 BasicCegarLoop]: 657 mSDtfsCounter, 682 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 4642 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 2653 SdHoareTripleChecker+Invalid, 4914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 4642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:22,701 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 2653 Invalid, 4914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 4642 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 06:46:22,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-03-19 06:46:22,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 799. [2022-03-19 06:46:22,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 627 states have (on average 1.3556618819776713) internal successors, (850), 640 states have internal predecessors, (850), 105 states have call successors, (105), 49 states have call predecessors, (105), 66 states have return successors, (133), 116 states have call predecessors, (133), 98 states have call successors, (133) [2022-03-19 06:46:22,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1088 transitions. [2022-03-19 06:46:22,885 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1088 transitions. Word has length 55 [2022-03-19 06:46:22,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:22,886 INFO L478 AbstractCegarLoop]: Abstraction has 799 states and 1088 transitions. [2022-03-19 06:46:22,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 06:46:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1088 transitions. [2022-03-19 06:46:22,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 06:46:22,887 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:22,888 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:22,888 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-19 06:46:22,888 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:22,888 INFO L85 PathProgramCache]: Analyzing trace with hash 562366210, now seen corresponding path program 1 times [2022-03-19 06:46:22,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:22,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [237048579] [2022-03-19 06:46:22,889 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:22,889 INFO L85 PathProgramCache]: Analyzing trace with hash 562366210, now seen corresponding path program 2 times [2022-03-19 06:46:22,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:22,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385876516] [2022-03-19 06:46:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:22,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:46:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:46:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:23,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:23,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385876516] [2022-03-19 06:46:23,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385876516] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:23,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:23,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:46:23,051 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:23,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [237048579] [2022-03-19 06:46:23,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [237048579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:23,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:23,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:46:23,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543143379] [2022-03-19 06:46:23,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:23,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:46:23,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:23,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:46:23,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:46:23,053 INFO L87 Difference]: Start difference. First operand 799 states and 1088 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 06:46:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:24,800 INFO L93 Difference]: Finished difference Result 984 states and 1370 transitions. [2022-03-19 06:46:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 06:46:24,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2022-03-19 06:46:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:24,803 INFO L225 Difference]: With dead ends: 984 [2022-03-19 06:46:24,804 INFO L226 Difference]: Without dead ends: 941 [2022-03-19 06:46:24,804 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:46:24,804 INFO L912 BasicCegarLoop]: 678 mSDtfsCounter, 1525 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1535 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:24,804 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1535 Valid, 1190 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 06:46:24,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-03-19 06:46:24,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 799. [2022-03-19 06:46:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 627 states have (on average 1.354066985645933) internal successors, (849), 640 states have internal predecessors, (849), 105 states have call successors, (105), 49 states have call predecessors, (105), 66 states have return successors, (133), 116 states have call predecessors, (133), 98 states have call successors, (133) [2022-03-19 06:46:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1087 transitions. [2022-03-19 06:46:24,983 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1087 transitions. Word has length 56 [2022-03-19 06:46:24,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:24,983 INFO L478 AbstractCegarLoop]: Abstraction has 799 states and 1087 transitions. [2022-03-19 06:46:24,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 06:46:24,983 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1087 transitions. [2022-03-19 06:46:24,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 06:46:24,985 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:24,985 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:24,985 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-19 06:46:24,985 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:24,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:24,985 INFO L85 PathProgramCache]: Analyzing trace with hash -514626408, now seen corresponding path program 1 times [2022-03-19 06:46:24,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:24,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [594449145] [2022-03-19 06:46:24,986 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:24,986 INFO L85 PathProgramCache]: Analyzing trace with hash -514626408, now seen corresponding path program 2 times [2022-03-19 06:46:24,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:24,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235413683] [2022-03-19 06:46:24,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:24,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 06:46:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 06:46:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:25,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:25,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235413683] [2022-03-19 06:46:25,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235413683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:46:25,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003997686] [2022-03-19 06:46:25,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:46:25,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:46:25,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:46:25,134 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) [2022-03-19 06:46:25,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 06:46:25,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:46:25,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:46:25,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 06:46:25,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:46:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:25,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:46:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:25,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003997686] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 06:46:25,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:46:25,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 15 [2022-03-19 06:46:25,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:25,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [594449145] [2022-03-19 06:46:25,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [594449145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:25,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:25,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:46:25,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195792386] [2022-03-19 06:46:25,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:25,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 06:46:25,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:25,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 06:46:25,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:46:25,985 INFO L87 Difference]: Start difference. First operand 799 states and 1087 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:46:26,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:26,774 INFO L93 Difference]: Finished difference Result 1117 states and 1518 transitions. [2022-03-19 06:46:26,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 06:46:26,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2022-03-19 06:46:26,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:26,778 INFO L225 Difference]: With dead ends: 1117 [2022-03-19 06:46:26,778 INFO L226 Difference]: Without dead ends: 953 [2022-03-19 06:46:26,779 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:46:26,780 INFO L912 BasicCegarLoop]: 678 mSDtfsCounter, 882 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:26,780 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 1125 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 06:46:26,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-03-19 06:46:27,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 837. [2022-03-19 06:46:27,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 658 states have (on average 1.3541033434650456) internal successors, (891), 671 states have internal predecessors, (891), 108 states have call successors, (108), 51 states have call predecessors, (108), 70 states have return successors, (143), 121 states have call predecessors, (143), 101 states have call successors, (143) [2022-03-19 06:46:27,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1142 transitions. [2022-03-19 06:46:27,054 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1142 transitions. Word has length 74 [2022-03-19 06:46:27,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:27,054 INFO L478 AbstractCegarLoop]: Abstraction has 837 states and 1142 transitions. [2022-03-19 06:46:27,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:46:27,054 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1142 transitions. [2022-03-19 06:46:27,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 06:46:27,055 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:27,055 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:27,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 06:46:27,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 06:46:27,256 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:27,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:27,257 INFO L85 PathProgramCache]: Analyzing trace with hash 2049298278, now seen corresponding path program 1 times [2022-03-19 06:46:27,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:27,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [861118998] [2022-03-19 06:46:27,257 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:27,257 INFO L85 PathProgramCache]: Analyzing trace with hash 2049298278, now seen corresponding path program 2 times [2022-03-19 06:46:27,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:27,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752478306] [2022-03-19 06:46:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:27,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:27,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:27,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752478306] [2022-03-19 06:46:27,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752478306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:27,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:27,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 06:46:27,570 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:27,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [861118998] [2022-03-19 06:46:27,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [861118998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:27,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:27,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 06:46:27,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670489465] [2022-03-19 06:46:27,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:27,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 06:46:27,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:27,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 06:46:27,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:46:27,572 INFO L87 Difference]: Start difference. First operand 837 states and 1142 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 06:46:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:30,590 INFO L93 Difference]: Finished difference Result 984 states and 1382 transitions. [2022-03-19 06:46:30,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 06:46:30,590 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 59 [2022-03-19 06:46:30,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:30,593 INFO L225 Difference]: With dead ends: 984 [2022-03-19 06:46:30,594 INFO L226 Difference]: Without dead ends: 958 [2022-03-19 06:46:30,594 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-19 06:46:30,595 INFO L912 BasicCegarLoop]: 636 mSDtfsCounter, 2002 mSDsluCounter, 2539 mSDsCounter, 0 mSdLazyCounter, 5900 mSolverCounterSat, 825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2006 SdHoareTripleChecker+Valid, 3175 SdHoareTripleChecker+Invalid, 6725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 825 IncrementalHoareTripleChecker+Valid, 5900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:30,595 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2006 Valid, 3175 Invalid, 6725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [825 Valid, 5900 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-19 06:46:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-03-19 06:46:30,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 836. [2022-03-19 06:46:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 657 states have (on average 1.339421613394216) internal successors, (880), 670 states have internal predecessors, (880), 108 states have call successors, (108), 51 states have call predecessors, (108), 70 states have return successors, (143), 121 states have call predecessors, (143), 101 states have call successors, (143) [2022-03-19 06:46:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1131 transitions. [2022-03-19 06:46:30,816 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1131 transitions. Word has length 59 [2022-03-19 06:46:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:30,816 INFO L478 AbstractCegarLoop]: Abstraction has 836 states and 1131 transitions. [2022-03-19 06:46:30,816 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 06:46:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1131 transitions. [2022-03-19 06:46:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 06:46:30,817 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:30,818 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:30,818 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-19 06:46:30,818 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:30,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:30,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1081135518, now seen corresponding path program 1 times [2022-03-19 06:46:30,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:30,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [160270584] [2022-03-19 06:46:30,819 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:30,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1081135518, now seen corresponding path program 2 times [2022-03-19 06:46:30,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:30,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826852340] [2022-03-19 06:46:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:30,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:30,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:30,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:30,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:30,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:31,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:31,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:31,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:31,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826852340] [2022-03-19 06:46:31,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826852340] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:31,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:31,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:46:31,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:31,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [160270584] [2022-03-19 06:46:31,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [160270584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:31,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:31,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:46:31,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717847587] [2022-03-19 06:46:31,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:31,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 06:46:31,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 06:46:31,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:46:31,095 INFO L87 Difference]: Start difference. First operand 836 states and 1131 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 06:46:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:33,968 INFO L93 Difference]: Finished difference Result 973 states and 1356 transitions. [2022-03-19 06:46:33,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 06:46:33,969 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2022-03-19 06:46:33,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:33,972 INFO L225 Difference]: With dead ends: 973 [2022-03-19 06:46:33,972 INFO L226 Difference]: Without dead ends: 953 [2022-03-19 06:46:33,973 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:46:33,973 INFO L912 BasicCegarLoop]: 652 mSDtfsCounter, 941 mSDsluCounter, 2251 mSDsCounter, 0 mSdLazyCounter, 5082 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 2903 SdHoareTripleChecker+Invalid, 5479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 5082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:33,973 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 2903 Invalid, 5479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 5082 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-19 06:46:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-03-19 06:46:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 833. [2022-03-19 06:46:34,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 655 states have (on average 1.3389312977099237) internal successors, (877), 668 states have internal predecessors, (877), 107 states have call successors, (107), 51 states have call predecessors, (107), 70 states have return successors, (142), 120 states have call predecessors, (142), 100 states have call successors, (142) [2022-03-19 06:46:34,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1126 transitions. [2022-03-19 06:46:34,184 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1126 transitions. Word has length 58 [2022-03-19 06:46:34,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:34,184 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1126 transitions. [2022-03-19 06:46:34,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 06:46:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1126 transitions. [2022-03-19 06:46:34,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 06:46:34,186 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:34,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:34,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-19 06:46:34,186 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:34,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:34,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1820752266, now seen corresponding path program 1 times [2022-03-19 06:46:34,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:34,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [469621841] [2022-03-19 06:46:34,187 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:34,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1820752266, now seen corresponding path program 2 times [2022-03-19 06:46:34,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:34,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619161503] [2022-03-19 06:46:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:34,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:34,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:34,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:34,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:34,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:34,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:34,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 06:46:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:34,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:34,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619161503] [2022-03-19 06:46:34,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619161503] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:34,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:34,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:46:34,414 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:34,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [469621841] [2022-03-19 06:46:34,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [469621841] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:34,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:34,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:46:34,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938635529] [2022-03-19 06:46:34,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:34,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 06:46:34,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:34,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 06:46:34,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:46:34,416 INFO L87 Difference]: Start difference. First operand 833 states and 1126 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 06:46:36,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:36,971 INFO L93 Difference]: Finished difference Result 1006 states and 1388 transitions. [2022-03-19 06:46:36,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 06:46:36,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 59 [2022-03-19 06:46:36,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:36,974 INFO L225 Difference]: With dead ends: 1006 [2022-03-19 06:46:36,974 INFO L226 Difference]: Without dead ends: 938 [2022-03-19 06:46:36,975 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-03-19 06:46:36,975 INFO L912 BasicCegarLoop]: 628 mSDtfsCounter, 673 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 4401 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 2420 SdHoareTripleChecker+Invalid, 4690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 4401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:36,976 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 2420 Invalid, 4690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 4401 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 06:46:36,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-03-19 06:46:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 821. [2022-03-19 06:46:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 646 states have (on average 1.3343653250773995) internal successors, (862), 659 states have internal predecessors, (862), 104 states have call successors, (104), 51 states have call predecessors, (104), 70 states have return successors, (139), 117 states have call predecessors, (139), 97 states have call successors, (139) [2022-03-19 06:46:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1105 transitions. [2022-03-19 06:46:37,210 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1105 transitions. Word has length 59 [2022-03-19 06:46:37,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:37,210 INFO L478 AbstractCegarLoop]: Abstraction has 821 states and 1105 transitions. [2022-03-19 06:46:37,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 06:46:37,210 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1105 transitions. [2022-03-19 06:46:37,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 06:46:37,211 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:37,211 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:37,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-19 06:46:37,212 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:37,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:37,212 INFO L85 PathProgramCache]: Analyzing trace with hash 600816654, now seen corresponding path program 1 times [2022-03-19 06:46:37,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:37,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [169796267] [2022-03-19 06:46:37,212 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:37,212 INFO L85 PathProgramCache]: Analyzing trace with hash 600816654, now seen corresponding path program 2 times [2022-03-19 06:46:37,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:37,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392754683] [2022-03-19 06:46:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:37,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:37,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:37,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:37,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:37,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:37,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:37,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:37,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 06:46:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:37,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:37,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392754683] [2022-03-19 06:46:37,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392754683] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:37,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:37,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:46:37,408 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:37,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [169796267] [2022-03-19 06:46:37,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [169796267] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:37,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:37,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:46:37,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287537336] [2022-03-19 06:46:37,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:37,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 06:46:37,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:37,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 06:46:37,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-03-19 06:46:37,409 INFO L87 Difference]: Start difference. First operand 821 states and 1105 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:46:39,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:39,241 INFO L93 Difference]: Finished difference Result 1102 states and 1563 transitions. [2022-03-19 06:46:39,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 06:46:39,242 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2022-03-19 06:46:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:39,245 INFO L225 Difference]: With dead ends: 1102 [2022-03-19 06:46:39,245 INFO L226 Difference]: Without dead ends: 991 [2022-03-19 06:46:39,246 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:46:39,247 INFO L912 BasicCegarLoop]: 608 mSDtfsCounter, 400 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:39,247 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1570 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 06:46:39,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-03-19 06:46:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 828. [2022-03-19 06:46:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 651 states have (on average 1.3348694316436251) internal successors, (869), 665 states have internal predecessors, (869), 105 states have call successors, (105), 51 states have call predecessors, (105), 71 states have return successors, (147), 118 states have call predecessors, (147), 98 states have call successors, (147) [2022-03-19 06:46:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1121 transitions. [2022-03-19 06:46:39,475 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1121 transitions. Word has length 60 [2022-03-19 06:46:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:39,475 INFO L478 AbstractCegarLoop]: Abstraction has 828 states and 1121 transitions. [2022-03-19 06:46:39,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:46:39,475 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1121 transitions. [2022-03-19 06:46:39,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 06:46:39,476 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:39,477 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:39,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-19 06:46:39,477 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:39,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:39,477 INFO L85 PathProgramCache]: Analyzing trace with hash 875576268, now seen corresponding path program 1 times [2022-03-19 06:46:39,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:39,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1280488873] [2022-03-19 06:46:39,478 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:39,478 INFO L85 PathProgramCache]: Analyzing trace with hash 875576268, now seen corresponding path program 2 times [2022-03-19 06:46:39,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:39,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478525281] [2022-03-19 06:46:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:39,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:39,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:39,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:39,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:39,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:39,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:39,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:39,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 06:46:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:39,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:39,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478525281] [2022-03-19 06:46:39,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478525281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:39,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:39,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:46:39,728 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:39,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1280488873] [2022-03-19 06:46:39,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1280488873] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:39,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:39,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:46:39,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267351205] [2022-03-19 06:46:39,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:39,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 06:46:39,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:39,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 06:46:39,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:46:39,733 INFO L87 Difference]: Start difference. First operand 828 states and 1121 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:46:41,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:41,800 INFO L93 Difference]: Finished difference Result 971 states and 1360 transitions. [2022-03-19 06:46:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 06:46:41,801 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2022-03-19 06:46:41,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:41,804 INFO L225 Difference]: With dead ends: 971 [2022-03-19 06:46:41,804 INFO L226 Difference]: Without dead ends: 946 [2022-03-19 06:46:41,805 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:46:41,805 INFO L912 BasicCegarLoop]: 633 mSDtfsCounter, 1274 mSDsluCounter, 1845 mSDsCounter, 0 mSdLazyCounter, 3598 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 2478 SdHoareTripleChecker+Invalid, 4112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 3598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:41,806 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 2478 Invalid, 4112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 3598 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 06:46:41,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-03-19 06:46:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 826. [2022-03-19 06:46:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 650 states have (on average 1.333846153846154) internal successors, (867), 664 states have internal predecessors, (867), 104 states have call successors, (104), 51 states have call predecessors, (104), 71 states have return successors, (146), 117 states have call predecessors, (146), 97 states have call successors, (146) [2022-03-19 06:46:42,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1117 transitions. [2022-03-19 06:46:42,044 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1117 transitions. Word has length 60 [2022-03-19 06:46:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:42,044 INFO L478 AbstractCegarLoop]: Abstraction has 826 states and 1117 transitions. [2022-03-19 06:46:42,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:46:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1117 transitions. [2022-03-19 06:46:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 06:46:42,046 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:42,046 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:42,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-19 06:46:42,046 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:42,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:42,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1391350355, now seen corresponding path program 1 times [2022-03-19 06:46:42,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:42,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1536138889] [2022-03-19 06:46:42,047 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:42,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1391350355, now seen corresponding path program 2 times [2022-03-19 06:46:42,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:42,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60790864] [2022-03-19 06:46:42,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:42,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:42,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:42,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:42,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:42,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:42,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:42,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 06:46:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:42,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:42,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60790864] [2022-03-19 06:46:42,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60790864] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:42,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:42,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:46:42,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:42,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1536138889] [2022-03-19 06:46:42,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1536138889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:42,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:42,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:46:42,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024338906] [2022-03-19 06:46:42,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:42,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 06:46:42,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:42,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 06:46:42,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-19 06:46:42,230 INFO L87 Difference]: Start difference. First operand 826 states and 1117 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 06:46:44,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:44,021 INFO L93 Difference]: Finished difference Result 980 states and 1364 transitions. [2022-03-19 06:46:44,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 06:46:44,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-03-19 06:46:44,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:44,024 INFO L225 Difference]: With dead ends: 980 [2022-03-19 06:46:44,024 INFO L226 Difference]: Without dead ends: 948 [2022-03-19 06:46:44,025 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:46:44,025 INFO L912 BasicCegarLoop]: 612 mSDtfsCounter, 645 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2114 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 2114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:44,025 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 1756 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 2114 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 06:46:44,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-03-19 06:46:44,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 826. [2022-03-19 06:46:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 650 states have (on average 1.3323076923076924) internal successors, (866), 664 states have internal predecessors, (866), 104 states have call successors, (104), 51 states have call predecessors, (104), 71 states have return successors, (146), 117 states have call predecessors, (146), 97 states have call successors, (146) [2022-03-19 06:46:44,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1116 transitions. [2022-03-19 06:46:44,263 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1116 transitions. Word has length 60 [2022-03-19 06:46:44,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:44,263 INFO L478 AbstractCegarLoop]: Abstraction has 826 states and 1116 transitions. [2022-03-19 06:46:44,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 06:46:44,263 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1116 transitions. [2022-03-19 06:46:44,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 06:46:44,265 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:44,265 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:44,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-19 06:46:44,265 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:44,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:44,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1900823445, now seen corresponding path program 1 times [2022-03-19 06:46:44,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:44,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [11416392] [2022-03-19 06:46:44,265 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:44,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1900823445, now seen corresponding path program 2 times [2022-03-19 06:46:44,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:44,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790717773] [2022-03-19 06:46:44,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:44,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:44,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:44,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:44,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:44,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:44,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:44,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 06:46:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:44,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:44,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790717773] [2022-03-19 06:46:44,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790717773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:44,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:44,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:46:44,531 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:44,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [11416392] [2022-03-19 06:46:44,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [11416392] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:44,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:44,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:46:44,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423720411] [2022-03-19 06:46:44,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:44,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 06:46:44,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:44,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 06:46:44,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:46:44,532 INFO L87 Difference]: Start difference. First operand 826 states and 1116 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 06:46:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:46,909 INFO L93 Difference]: Finished difference Result 987 states and 1381 transitions. [2022-03-19 06:46:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 06:46:46,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-03-19 06:46:46,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:46,912 INFO L225 Difference]: With dead ends: 987 [2022-03-19 06:46:46,912 INFO L226 Difference]: Without dead ends: 935 [2022-03-19 06:46:46,913 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-03-19 06:46:46,913 INFO L912 BasicCegarLoop]: 627 mSDtfsCounter, 971 mSDsluCounter, 2033 mSDsCounter, 0 mSdLazyCounter, 4127 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 4521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 4127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:46,913 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 2660 Invalid, 4521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 4127 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 06:46:46,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-03-19 06:46:47,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 818. [2022-03-19 06:46:47,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 644 states have (on average 1.3276397515527951) internal successors, (855), 658 states have internal predecessors, (855), 102 states have call successors, (102), 51 states have call predecessors, (102), 71 states have return successors, (144), 115 states have call predecessors, (144), 95 states have call successors, (144) [2022-03-19 06:46:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1101 transitions. [2022-03-19 06:46:47,175 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1101 transitions. Word has length 60 [2022-03-19 06:46:47,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:47,175 INFO L478 AbstractCegarLoop]: Abstraction has 818 states and 1101 transitions. [2022-03-19 06:46:47,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 06:46:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1101 transitions. [2022-03-19 06:46:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 06:46:47,177 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:47,177 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:47,177 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-19 06:46:47,177 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:47,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:47,177 INFO L85 PathProgramCache]: Analyzing trace with hash -384399656, now seen corresponding path program 1 times [2022-03-19 06:46:47,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:47,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [229276505] [2022-03-19 06:46:47,178 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:47,178 INFO L85 PathProgramCache]: Analyzing trace with hash -384399656, now seen corresponding path program 2 times [2022-03-19 06:46:47,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:47,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839318895] [2022-03-19 06:46:47,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:47,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:47,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:47,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:47,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:47,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:47,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:47,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:47,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 06:46:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:47,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:47,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839318895] [2022-03-19 06:46:47,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839318895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:47,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:47,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:46:47,377 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:47,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [229276505] [2022-03-19 06:46:47,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [229276505] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:47,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:47,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:46:47,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973868819] [2022-03-19 06:46:47,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:47,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:46:47,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:47,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:46:47,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:46:47,378 INFO L87 Difference]: Start difference. First operand 818 states and 1101 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:46:49,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:49,119 INFO L93 Difference]: Finished difference Result 983 states and 1382 transitions. [2022-03-19 06:46:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:46:49,119 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 61 [2022-03-19 06:46:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:49,122 INFO L225 Difference]: With dead ends: 983 [2022-03-19 06:46:49,122 INFO L226 Difference]: Without dead ends: 949 [2022-03-19 06:46:49,123 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:46:49,123 INFO L912 BasicCegarLoop]: 593 mSDtfsCounter, 654 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:49,123 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 1481 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 1651 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 06:46:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-03-19 06:46:49,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 822. [2022-03-19 06:46:49,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 646 states have (on average 1.326625386996904) internal successors, (857), 662 states have internal predecessors, (857), 102 states have call successors, (102), 51 states have call predecessors, (102), 73 states have return successors, (160), 115 states have call predecessors, (160), 95 states have call successors, (160) [2022-03-19 06:46:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1119 transitions. [2022-03-19 06:46:49,345 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1119 transitions. Word has length 61 [2022-03-19 06:46:49,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:49,345 INFO L478 AbstractCegarLoop]: Abstraction has 822 states and 1119 transitions. [2022-03-19 06:46:49,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:46:49,345 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1119 transitions. [2022-03-19 06:46:49,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 06:46:49,347 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:49,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:49,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-19 06:46:49,347 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:49,347 INFO L85 PathProgramCache]: Analyzing trace with hash 73194234, now seen corresponding path program 1 times [2022-03-19 06:46:49,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:49,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1165176914] [2022-03-19 06:46:49,347 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:49,347 INFO L85 PathProgramCache]: Analyzing trace with hash 73194234, now seen corresponding path program 2 times [2022-03-19 06:46:49,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:49,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746607324] [2022-03-19 06:46:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:49,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:49,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:49,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:49,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:49,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:49,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:49,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 06:46:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:49,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:49,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:49,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746607324] [2022-03-19 06:46:49,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746607324] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:49,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:49,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 06:46:49,668 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:49,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1165176914] [2022-03-19 06:46:49,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1165176914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:49,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:49,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 06:46:49,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042117492] [2022-03-19 06:46:49,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:49,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 06:46:49,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:49,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 06:46:49,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:46:49,669 INFO L87 Difference]: Start difference. First operand 822 states and 1119 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 06:46:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:52,557 INFO L93 Difference]: Finished difference Result 961 states and 1352 transitions. [2022-03-19 06:46:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 06:46:52,557 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2022-03-19 06:46:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:52,560 INFO L225 Difference]: With dead ends: 961 [2022-03-19 06:46:52,560 INFO L226 Difference]: Without dead ends: 937 [2022-03-19 06:46:52,560 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-19 06:46:52,561 INFO L912 BasicCegarLoop]: 592 mSDtfsCounter, 1489 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 5390 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 3156 SdHoareTripleChecker+Invalid, 6006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 5390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:52,561 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1492 Valid, 3156 Invalid, 6006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 5390 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-19 06:46:52,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-03-19 06:46:52,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 820. [2022-03-19 06:46:52,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 645 states have (on average 1.3255813953488371) internal successors, (855), 661 states have internal predecessors, (855), 101 states have call successors, (101), 51 states have call predecessors, (101), 73 states have return successors, (159), 114 states have call predecessors, (159), 94 states have call successors, (159) [2022-03-19 06:46:52,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1115 transitions. [2022-03-19 06:46:52,795 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1115 transitions. Word has length 63 [2022-03-19 06:46:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:52,795 INFO L478 AbstractCegarLoop]: Abstraction has 820 states and 1115 transitions. [2022-03-19 06:46:52,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 06:46:52,795 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1115 transitions. [2022-03-19 06:46:52,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 06:46:52,796 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:52,796 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:52,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-19 06:46:52,797 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:52,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:52,797 INFO L85 PathProgramCache]: Analyzing trace with hash -395524383, now seen corresponding path program 1 times [2022-03-19 06:46:52,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:52,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1814657594] [2022-03-19 06:46:52,797 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:52,797 INFO L85 PathProgramCache]: Analyzing trace with hash -395524383, now seen corresponding path program 2 times [2022-03-19 06:46:52,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:52,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869391249] [2022-03-19 06:46:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:52,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:52,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:52,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:52,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:52,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:52,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:53,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:53,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 06:46:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:53,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:53,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:53,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869391249] [2022-03-19 06:46:53,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869391249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:53,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:53,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 06:46:53,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:53,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1814657594] [2022-03-19 06:46:53,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1814657594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:53,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:53,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 06:46:53,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901316444] [2022-03-19 06:46:53,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:53,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 06:46:53,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:53,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 06:46:53,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:46:53,110 INFO L87 Difference]: Start difference. First operand 820 states and 1115 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 10 states have internal predecessors, (48), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 06:46:56,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:56,075 INFO L93 Difference]: Finished difference Result 961 states and 1350 transitions. [2022-03-19 06:46:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 06:46:56,075 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 10 states have internal predecessors, (48), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 66 [2022-03-19 06:46:56,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:56,079 INFO L225 Difference]: With dead ends: 961 [2022-03-19 06:46:56,079 INFO L226 Difference]: Without dead ends: 936 [2022-03-19 06:46:56,080 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-19 06:46:56,080 INFO L912 BasicCegarLoop]: 590 mSDtfsCounter, 1517 mSDsluCounter, 2795 mSDsCounter, 0 mSdLazyCounter, 5493 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 6119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 5493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:56,080 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1521 Valid, 3385 Invalid, 6119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 5493 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 06:46:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-03-19 06:46:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 818. [2022-03-19 06:46:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 644 states have (on average 1.3245341614906831) internal successors, (853), 660 states have internal predecessors, (853), 100 states have call successors, (100), 51 states have call predecessors, (100), 73 states have return successors, (158), 113 states have call predecessors, (158), 93 states have call successors, (158) [2022-03-19 06:46:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1111 transitions. [2022-03-19 06:46:56,321 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1111 transitions. Word has length 66 [2022-03-19 06:46:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:56,321 INFO L478 AbstractCegarLoop]: Abstraction has 818 states and 1111 transitions. [2022-03-19 06:46:56,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 10 states have internal predecessors, (48), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 06:46:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1111 transitions. [2022-03-19 06:46:56,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 06:46:56,324 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:56,324 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:56,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-19 06:46:56,324 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:56,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:56,324 INFO L85 PathProgramCache]: Analyzing trace with hash 233977310, now seen corresponding path program 1 times [2022-03-19 06:46:56,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:56,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1611822142] [2022-03-19 06:46:56,325 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:56,325 INFO L85 PathProgramCache]: Analyzing trace with hash 233977310, now seen corresponding path program 2 times [2022-03-19 06:46:56,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:56,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445950268] [2022-03-19 06:46:56,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:56,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:56,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:56,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:56,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:56,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:56,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:56,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 06:46:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:56,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:46:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:56,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:56,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445950268] [2022-03-19 06:46:56,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445950268] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:56,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:56,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 06:46:56,613 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:56,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1611822142] [2022-03-19 06:46:56,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1611822142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:56,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:56,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 06:46:56,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404071501] [2022-03-19 06:46:56,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:56,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 06:46:56,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:56,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 06:46:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:46:56,617 INFO L87 Difference]: Start difference. First operand 818 states and 1111 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 06:46:59,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:59,569 INFO L93 Difference]: Finished difference Result 958 states and 1343 transitions. [2022-03-19 06:46:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 06:46:59,570 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 62 [2022-03-19 06:46:59,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:59,572 INFO L225 Difference]: With dead ends: 958 [2022-03-19 06:46:59,572 INFO L226 Difference]: Without dead ends: 934 [2022-03-19 06:46:59,573 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-19 06:46:59,573 INFO L912 BasicCegarLoop]: 567 mSDtfsCounter, 1189 mSDsluCounter, 2371 mSDsCounter, 0 mSdLazyCounter, 5647 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 2938 SdHoareTripleChecker+Invalid, 6137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 5647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:59,574 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 2938 Invalid, 6137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 5647 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 06:46:59,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-03-19 06:46:59,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 816. [2022-03-19 06:46:59,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 643 states have (on average 1.32348367029549) internal successors, (851), 659 states have internal predecessors, (851), 99 states have call successors, (99), 51 states have call predecessors, (99), 73 states have return successors, (157), 112 states have call predecessors, (157), 92 states have call successors, (157) [2022-03-19 06:46:59,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1107 transitions. [2022-03-19 06:46:59,811 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1107 transitions. Word has length 62 [2022-03-19 06:46:59,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:59,811 INFO L478 AbstractCegarLoop]: Abstraction has 816 states and 1107 transitions. [2022-03-19 06:46:59,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 06:46:59,811 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1107 transitions. [2022-03-19 06:46:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 06:46:59,813 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:59,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:59,813 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-19 06:46:59,813 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:59,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:59,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1213250190, now seen corresponding path program 1 times [2022-03-19 06:46:59,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:59,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [880895973] [2022-03-19 06:46:59,814 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:59,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1213250190, now seen corresponding path program 2 times [2022-03-19 06:46:59,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:59,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168315043] [2022-03-19 06:46:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:59,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:59,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:59,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:59,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:59,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:00,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:47:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:00,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:47:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:00,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:00,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:00,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168315043] [2022-03-19 06:47:00,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168315043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:00,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:00,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:47:00,108 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:00,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [880895973] [2022-03-19 06:47:00,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [880895973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:00,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:00,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:47:00,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986064789] [2022-03-19 06:47:00,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:00,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 06:47:00,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:00,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 06:47:00,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:47:00,110 INFO L87 Difference]: Start difference. First operand 816 states and 1107 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:02,491 INFO L93 Difference]: Finished difference Result 949 states and 1332 transitions. [2022-03-19 06:47:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 06:47:02,493 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) Word has length 62 [2022-03-19 06:47:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:02,495 INFO L225 Difference]: With dead ends: 949 [2022-03-19 06:47:02,495 INFO L226 Difference]: Without dead ends: 927 [2022-03-19 06:47:02,495 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:47:02,496 INFO L912 BasicCegarLoop]: 590 mSDtfsCounter, 600 mSDsluCounter, 2456 mSDsCounter, 0 mSdLazyCounter, 5198 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 3046 SdHoareTripleChecker+Invalid, 5439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 5198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:02,496 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 3046 Invalid, 5439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 5198 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-19 06:47:02,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-03-19 06:47:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 811. [2022-03-19 06:47:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 640 states have (on average 1.3234375) internal successors, (847), 656 states have internal predecessors, (847), 98 states have call successors, (98), 51 states have call predecessors, (98), 72 states have return successors, (155), 110 states have call predecessors, (155), 91 states have call successors, (155) [2022-03-19 06:47:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1100 transitions. [2022-03-19 06:47:02,742 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1100 transitions. Word has length 62 [2022-03-19 06:47:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:02,743 INFO L478 AbstractCegarLoop]: Abstraction has 811 states and 1100 transitions. [2022-03-19 06:47:02,743 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:02,743 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1100 transitions. [2022-03-19 06:47:02,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 06:47:02,745 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:02,745 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:02,745 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-19 06:47:02,745 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:02,746 INFO L85 PathProgramCache]: Analyzing trace with hash -20126443, now seen corresponding path program 1 times [2022-03-19 06:47:02,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:02,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1412443724] [2022-03-19 06:47:02,746 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:02,746 INFO L85 PathProgramCache]: Analyzing trace with hash -20126443, now seen corresponding path program 2 times [2022-03-19 06:47:02,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:02,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508744327] [2022-03-19 06:47:02,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:02,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:02,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:02,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:02,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:02,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:02,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:47:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:02,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:47:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:02,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:47:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:02,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:02,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508744327] [2022-03-19 06:47:02,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508744327] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:02,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:02,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:47:02,902 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:02,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1412443724] [2022-03-19 06:47:02,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1412443724] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:02,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:02,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:47:02,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511262903] [2022-03-19 06:47:02,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:02,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:47:02,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:02,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:47:02,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:47:02,904 INFO L87 Difference]: Start difference. First operand 811 states and 1100 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:04,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:04,077 INFO L93 Difference]: Finished difference Result 1144 states and 1570 transitions. [2022-03-19 06:47:04,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 06:47:04,078 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2022-03-19 06:47:04,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:04,080 INFO L225 Difference]: With dead ends: 1144 [2022-03-19 06:47:04,080 INFO L226 Difference]: Without dead ends: 812 [2022-03-19 06:47:04,081 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-03-19 06:47:04,082 INFO L912 BasicCegarLoop]: 523 mSDtfsCounter, 909 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:04,082 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 884 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 06:47:04,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-03-19 06:47:04,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 703. [2022-03-19 06:47:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 555 states have (on average 1.3099099099099099) internal successors, (727), 571 states have internal predecessors, (727), 85 states have call successors, (85), 45 states have call predecessors, (85), 62 states have return successors, (109), 93 states have call predecessors, (109), 78 states have call successors, (109) [2022-03-19 06:47:04,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 921 transitions. [2022-03-19 06:47:04,303 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 921 transitions. Word has length 63 [2022-03-19 06:47:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:04,303 INFO L478 AbstractCegarLoop]: Abstraction has 703 states and 921 transitions. [2022-03-19 06:47:04,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:04,303 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 921 transitions. [2022-03-19 06:47:04,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 06:47:04,305 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:04,305 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:04,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-19 06:47:04,305 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:04,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:04,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1125022054, now seen corresponding path program 1 times [2022-03-19 06:47:04,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:04,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [398271973] [2022-03-19 06:47:04,306 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:04,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1125022054, now seen corresponding path program 2 times [2022-03-19 06:47:04,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:04,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532698804] [2022-03-19 06:47:04,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:04,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:04,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:04,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:04,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:04,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:04,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:47:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:04,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:47:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:04,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:04,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:04,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532698804] [2022-03-19 06:47:04,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532698804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:04,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:04,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:47:04,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:04,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [398271973] [2022-03-19 06:47:04,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [398271973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:04,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:04,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:47:04,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400335766] [2022-03-19 06:47:04,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:04,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 06:47:04,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:04,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 06:47:04,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:47:04,566 INFO L87 Difference]: Start difference. First operand 703 states and 921 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:07,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:07,241 INFO L93 Difference]: Finished difference Result 780 states and 1034 transitions. [2022-03-19 06:47:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 06:47:07,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) Word has length 63 [2022-03-19 06:47:07,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:07,243 INFO L225 Difference]: With dead ends: 780 [2022-03-19 06:47:07,243 INFO L226 Difference]: Without dead ends: 758 [2022-03-19 06:47:07,244 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-19 06:47:07,244 INFO L912 BasicCegarLoop]: 525 mSDtfsCounter, 841 mSDsluCounter, 2158 mSDsCounter, 0 mSdLazyCounter, 5817 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 2683 SdHoareTripleChecker+Invalid, 6139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 5817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:07,244 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 2683 Invalid, 6139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 5817 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-19 06:47:07,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-03-19 06:47:07,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 698. [2022-03-19 06:47:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 552 states have (on average 1.309782608695652) internal successors, (723), 568 states have internal predecessors, (723), 84 states have call successors, (84), 45 states have call predecessors, (84), 61 states have return successors, (107), 91 states have call predecessors, (107), 77 states have call successors, (107) [2022-03-19 06:47:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 914 transitions. [2022-03-19 06:47:07,467 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 914 transitions. Word has length 63 [2022-03-19 06:47:07,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:07,467 INFO L478 AbstractCegarLoop]: Abstraction has 698 states and 914 transitions. [2022-03-19 06:47:07,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:07,467 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 914 transitions. [2022-03-19 06:47:07,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 06:47:07,469 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:07,469 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:07,469 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-19 06:47:07,469 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:07,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:07,470 INFO L85 PathProgramCache]: Analyzing trace with hash -871017626, now seen corresponding path program 1 times [2022-03-19 06:47:07,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:07,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1329995144] [2022-03-19 06:47:07,470 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:07,470 INFO L85 PathProgramCache]: Analyzing trace with hash -871017626, now seen corresponding path program 2 times [2022-03-19 06:47:07,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:07,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252037013] [2022-03-19 06:47:07,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:07,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:07,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:07,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:07,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:07,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 06:47:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:07,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:47:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:07,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:47:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:07,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 06:47:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:07,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:07,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252037013] [2022-03-19 06:47:07,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252037013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:07,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:07,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:47:07,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:07,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1329995144] [2022-03-19 06:47:07,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1329995144] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:07,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:07,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:47:07,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076400593] [2022-03-19 06:47:07,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:07,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 06:47:07,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:07,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 06:47:07,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-19 06:47:07,613 INFO L87 Difference]: Start difference. First operand 698 states and 914 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:09,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:09,118 INFO L93 Difference]: Finished difference Result 971 states and 1279 transitions. [2022-03-19 06:47:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 06:47:09,118 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-03-19 06:47:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:09,120 INFO L225 Difference]: With dead ends: 971 [2022-03-19 06:47:09,120 INFO L226 Difference]: Without dead ends: 834 [2022-03-19 06:47:09,121 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:47:09,121 INFO L912 BasicCegarLoop]: 536 mSDtfsCounter, 844 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:09,121 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 1065 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 06:47:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-03-19 06:47:09,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 717. [2022-03-19 06:47:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 567 states have (on average 1.3015873015873016) internal successors, (738), 582 states have internal predecessors, (738), 84 states have call successors, (84), 48 states have call predecessors, (84), 65 states have return successors, (106), 93 states have call predecessors, (106), 78 states have call successors, (106) [2022-03-19 06:47:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 928 transitions. [2022-03-19 06:47:09,338 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 928 transitions. Word has length 67 [2022-03-19 06:47:09,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:09,339 INFO L478 AbstractCegarLoop]: Abstraction has 717 states and 928 transitions. [2022-03-19 06:47:09,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:09,339 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 928 transitions. [2022-03-19 06:47:09,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 06:47:09,340 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:09,340 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:09,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-19 06:47:09,341 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:09,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:09,341 INFO L85 PathProgramCache]: Analyzing trace with hash 505400329, now seen corresponding path program 1 times [2022-03-19 06:47:09,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:09,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1388717567] [2022-03-19 06:47:09,341 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:09,342 INFO L85 PathProgramCache]: Analyzing trace with hash 505400329, now seen corresponding path program 2 times [2022-03-19 06:47:09,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:09,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169385653] [2022-03-19 06:47:09,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:09,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:09,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:09,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:09,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:09,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 06:47:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:09,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:47:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:09,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:47:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:09,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:47:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:09,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:47:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:09,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:09,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169385653] [2022-03-19 06:47:09,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169385653] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:09,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:09,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:47:09,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:09,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1388717567] [2022-03-19 06:47:09,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1388717567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:09,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:09,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:47:09,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405182511] [2022-03-19 06:47:09,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:09,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 06:47:09,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:09,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 06:47:09,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-19 06:47:09,512 INFO L87 Difference]: Start difference. First operand 717 states and 928 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 06:47:10,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:10,953 INFO L93 Difference]: Finished difference Result 908 states and 1199 transitions. [2022-03-19 06:47:10,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 06:47:10,954 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 66 [2022-03-19 06:47:10,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:10,956 INFO L225 Difference]: With dead ends: 908 [2022-03-19 06:47:10,956 INFO L226 Difference]: Without dead ends: 788 [2022-03-19 06:47:10,957 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:47:10,958 INFO L912 BasicCegarLoop]: 481 mSDtfsCounter, 416 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:10,958 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 934 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 06:47:10,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-03-19 06:47:11,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 717. [2022-03-19 06:47:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 567 states have (on average 1.2962962962962963) internal successors, (735), 582 states have internal predecessors, (735), 84 states have call successors, (84), 48 states have call predecessors, (84), 65 states have return successors, (106), 93 states have call predecessors, (106), 78 states have call successors, (106) [2022-03-19 06:47:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 925 transitions. [2022-03-19 06:47:11,187 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 925 transitions. Word has length 66 [2022-03-19 06:47:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:11,187 INFO L478 AbstractCegarLoop]: Abstraction has 717 states and 925 transitions. [2022-03-19 06:47:11,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 06:47:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 925 transitions. [2022-03-19 06:47:11,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 06:47:11,189 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:11,189 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:11,189 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-19 06:47:11,189 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:11,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:11,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1348887076, now seen corresponding path program 1 times [2022-03-19 06:47:11,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:11,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [774117583] [2022-03-19 06:47:11,190 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:11,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1348887076, now seen corresponding path program 2 times [2022-03-19 06:47:11,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:11,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566974786] [2022-03-19 06:47:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:11,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:11,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:11,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:11,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:11,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:11,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:11,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:47:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:11,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 06:47:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:11,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:11,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566974786] [2022-03-19 06:47:11,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566974786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:11,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:11,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:47:11,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:11,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [774117583] [2022-03-19 06:47:11,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [774117583] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:11,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:11,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:47:11,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710647745] [2022-03-19 06:47:11,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:11,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:47:11,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:11,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:47:11,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:47:11,388 INFO L87 Difference]: Start difference. First operand 717 states and 925 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 06:47:13,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:13,353 INFO L93 Difference]: Finished difference Result 852 states and 1114 transitions. [2022-03-19 06:47:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 06:47:13,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-03-19 06:47:13,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:13,355 INFO L225 Difference]: With dead ends: 852 [2022-03-19 06:47:13,356 INFO L226 Difference]: Without dead ends: 819 [2022-03-19 06:47:13,356 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:47:13,361 INFO L912 BasicCegarLoop]: 502 mSDtfsCounter, 1601 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1604 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:13,361 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1604 Valid, 1355 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 06:47:13,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-03-19 06:47:13,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 723. [2022-03-19 06:47:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 572 states have (on average 1.2954545454545454) internal successors, (741), 587 states have internal predecessors, (741), 85 states have call successors, (85), 48 states have call predecessors, (85), 65 states have return successors, (107), 94 states have call predecessors, (107), 79 states have call successors, (107) [2022-03-19 06:47:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 933 transitions. [2022-03-19 06:47:13,599 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 933 transitions. Word has length 65 [2022-03-19 06:47:13,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:13,599 INFO L478 AbstractCegarLoop]: Abstraction has 723 states and 933 transitions. [2022-03-19 06:47:13,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 06:47:13,599 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 933 transitions. [2022-03-19 06:47:13,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 06:47:13,600 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:13,601 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:13,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-19 06:47:13,601 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:13,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1649412610, now seen corresponding path program 1 times [2022-03-19 06:47:13,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:13,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1122361029] [2022-03-19 06:47:13,601 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:13,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1649412610, now seen corresponding path program 2 times [2022-03-19 06:47:13,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:13,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288968911] [2022-03-19 06:47:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:13,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:13,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:13,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:13,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:13,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:13,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:47:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:13,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:47:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:13,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:13,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:13,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:13,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288968911] [2022-03-19 06:47:13,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288968911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:13,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:13,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 06:47:13,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:13,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1122361029] [2022-03-19 06:47:13,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1122361029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:13,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:13,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 06:47:13,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512994161] [2022-03-19 06:47:13,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:13,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 06:47:13,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:13,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 06:47:13,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:47:13,908 INFO L87 Difference]: Start difference. First operand 723 states and 933 transitions. Second operand has 21 states, 20 states have (on average 2.45) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 06:47:16,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:16,625 INFO L93 Difference]: Finished difference Result 816 states and 1069 transitions. [2022-03-19 06:47:16,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 06:47:16,625 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 67 [2022-03-19 06:47:16,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:16,627 INFO L225 Difference]: With dead ends: 816 [2022-03-19 06:47:16,627 INFO L226 Difference]: Without dead ends: 791 [2022-03-19 06:47:16,628 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-19 06:47:16,628 INFO L912 BasicCegarLoop]: 516 mSDtfsCounter, 1701 mSDsluCounter, 2356 mSDsCounter, 0 mSdLazyCounter, 5322 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 2872 SdHoareTripleChecker+Invalid, 5967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 5322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:16,628 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 2872 Invalid, 5967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 5322 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 06:47:16,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-19 06:47:16,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 721. [2022-03-19 06:47:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 571 states have (on average 1.2942206654991244) internal successors, (739), 586 states have internal predecessors, (739), 84 states have call successors, (84), 48 states have call predecessors, (84), 65 states have return successors, (106), 93 states have call predecessors, (106), 78 states have call successors, (106) [2022-03-19 06:47:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 929 transitions. [2022-03-19 06:47:16,864 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 929 transitions. Word has length 67 [2022-03-19 06:47:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:16,864 INFO L478 AbstractCegarLoop]: Abstraction has 721 states and 929 transitions. [2022-03-19 06:47:16,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 06:47:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 929 transitions. [2022-03-19 06:47:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 06:47:16,866 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:16,866 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:16,866 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-19 06:47:16,866 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:16,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:16,867 INFO L85 PathProgramCache]: Analyzing trace with hash 257334910, now seen corresponding path program 1 times [2022-03-19 06:47:16,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:16,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1756904460] [2022-03-19 06:47:16,867 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:16,867 INFO L85 PathProgramCache]: Analyzing trace with hash 257334910, now seen corresponding path program 2 times [2022-03-19 06:47:16,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:16,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291032755] [2022-03-19 06:47:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:16,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:16,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:16,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:16,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:16,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:16,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:17,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:47:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:17,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 06:47:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:17,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:17,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291032755] [2022-03-19 06:47:17,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291032755] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:17,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:17,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:47:17,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:17,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1756904460] [2022-03-19 06:47:17,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1756904460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:17,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:17,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:47:17,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427263311] [2022-03-19 06:47:17,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:17,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:47:17,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:17,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:47:17,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:47:17,050 INFO L87 Difference]: Start difference. First operand 721 states and 929 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:18,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:18,801 INFO L93 Difference]: Finished difference Result 847 states and 1100 transitions. [2022-03-19 06:47:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:47:18,801 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-03-19 06:47:18,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:18,804 INFO L225 Difference]: With dead ends: 847 [2022-03-19 06:47:18,804 INFO L226 Difference]: Without dead ends: 793 [2022-03-19 06:47:18,805 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:47:18,805 INFO L912 BasicCegarLoop]: 504 mSDtfsCounter, 591 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 2300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:18,805 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 1527 Invalid, 2300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 06:47:18,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-03-19 06:47:19,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 721. [2022-03-19 06:47:19,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 571 states have (on average 1.2907180385288968) internal successors, (737), 586 states have internal predecessors, (737), 84 states have call successors, (84), 48 states have call predecessors, (84), 65 states have return successors, (106), 93 states have call predecessors, (106), 78 states have call successors, (106) [2022-03-19 06:47:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 927 transitions. [2022-03-19 06:47:19,156 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 927 transitions. Word has length 66 [2022-03-19 06:47:19,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:19,156 INFO L478 AbstractCegarLoop]: Abstraction has 721 states and 927 transitions. [2022-03-19 06:47:19,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:19,157 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 927 transitions. [2022-03-19 06:47:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 06:47:19,158 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:19,158 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:19,158 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-19 06:47:19,159 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:19,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:19,159 INFO L85 PathProgramCache]: Analyzing trace with hash 958934784, now seen corresponding path program 1 times [2022-03-19 06:47:19,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:19,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1609544613] [2022-03-19 06:47:19,159 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:19,159 INFO L85 PathProgramCache]: Analyzing trace with hash 958934784, now seen corresponding path program 2 times [2022-03-19 06:47:19,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:19,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130866338] [2022-03-19 06:47:19,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:19,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:19,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:19,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:19,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:19,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:19,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:19,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:47:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:19,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 06:47:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:19,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:19,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130866338] [2022-03-19 06:47:19,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130866338] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:19,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:19,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:47:19,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:19,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1609544613] [2022-03-19 06:47:19,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1609544613] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:19,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:19,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:47:19,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701890153] [2022-03-19 06:47:19,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:19,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 06:47:19,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:19,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 06:47:19,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:47:19,390 INFO L87 Difference]: Start difference. First operand 721 states and 927 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 7 states have internal predecessors, (50), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:21,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:21,427 INFO L93 Difference]: Finished difference Result 818 states and 1067 transitions. [2022-03-19 06:47:21,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 06:47:21,428 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 7 states have internal predecessors, (50), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-03-19 06:47:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:21,429 INFO L225 Difference]: With dead ends: 818 [2022-03-19 06:47:21,429 INFO L226 Difference]: Without dead ends: 741 [2022-03-19 06:47:21,430 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:47:21,430 INFO L912 BasicCegarLoop]: 508 mSDtfsCounter, 922 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 3397 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 3745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 3397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:21,430 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 1876 Invalid, 3745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 3397 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 06:47:21,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-03-19 06:47:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 684. [2022-03-19 06:47:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 541 states have (on average 1.277264325323475) internal successors, (691), 556 states have internal predecessors, (691), 77 states have call successors, (77), 48 states have call predecessors, (77), 65 states have return successors, (98), 86 states have call predecessors, (98), 71 states have call successors, (98) [2022-03-19 06:47:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 866 transitions. [2022-03-19 06:47:21,636 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 866 transitions. Word has length 66 [2022-03-19 06:47:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:21,636 INFO L478 AbstractCegarLoop]: Abstraction has 684 states and 866 transitions. [2022-03-19 06:47:21,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 7 states have internal predecessors, (50), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 866 transitions. [2022-03-19 06:47:21,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 06:47:21,638 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:21,638 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:21,638 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-19 06:47:21,638 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:21,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:21,639 INFO L85 PathProgramCache]: Analyzing trace with hash -896433839, now seen corresponding path program 1 times [2022-03-19 06:47:21,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:21,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [901828150] [2022-03-19 06:47:21,639 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:21,639 INFO L85 PathProgramCache]: Analyzing trace with hash -896433839, now seen corresponding path program 2 times [2022-03-19 06:47:21,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:21,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124198856] [2022-03-19 06:47:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:21,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:21,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:21,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:21,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:21,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:21,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:21,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 06:47:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:21,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:21,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:21,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124198856] [2022-03-19 06:47:21,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124198856] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:21,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:21,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:47:21,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:21,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [901828150] [2022-03-19 06:47:21,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [901828150] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:21,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:21,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:47:21,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541069715] [2022-03-19 06:47:21,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:21,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:47:21,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:21,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:47:21,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:47:21,817 INFO L87 Difference]: Start difference. First operand 684 states and 866 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:23,467 INFO L93 Difference]: Finished difference Result 769 states and 981 transitions. [2022-03-19 06:47:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:47:23,467 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-03-19 06:47:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:23,469 INFO L225 Difference]: With dead ends: 769 [2022-03-19 06:47:23,469 INFO L226 Difference]: Without dead ends: 730 [2022-03-19 06:47:23,470 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:47:23,470 INFO L912 BasicCegarLoop]: 451 mSDtfsCounter, 523 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 1977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:23,470 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 1210 Invalid, 1977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1783 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 06:47:23,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-03-19 06:47:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 679. [2022-03-19 06:47:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 537 states have (on average 1.277467411545624) internal successors, (686), 552 states have internal predecessors, (686), 76 states have call successors, (76), 48 states have call predecessors, (76), 65 states have return successors, (97), 85 states have call predecessors, (97), 70 states have call successors, (97) [2022-03-19 06:47:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 859 transitions. [2022-03-19 06:47:23,711 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 859 transitions. Word has length 67 [2022-03-19 06:47:23,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:23,711 INFO L478 AbstractCegarLoop]: Abstraction has 679 states and 859 transitions. [2022-03-19 06:47:23,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:23,711 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 859 transitions. [2022-03-19 06:47:23,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 06:47:23,712 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:23,712 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:23,712 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-19 06:47:23,712 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:23,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:23,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1676375305, now seen corresponding path program 1 times [2022-03-19 06:47:23,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:23,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [554308593] [2022-03-19 06:47:23,713 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:23,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1676375305, now seen corresponding path program 2 times [2022-03-19 06:47:23,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:23,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998867350] [2022-03-19 06:47:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:23,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:23,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:23,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:23,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:23,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:23,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:47:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:23,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:47:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:23,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:23,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:23,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998867350] [2022-03-19 06:47:23,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998867350] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:23,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:23,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:47:23,909 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:23,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [554308593] [2022-03-19 06:47:23,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [554308593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:23,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:23,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:47:23,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024486443] [2022-03-19 06:47:23,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:23,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:47:23,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:23,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:47:23,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:47:23,910 INFO L87 Difference]: Start difference. First operand 679 states and 859 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:25,267 INFO L93 Difference]: Finished difference Result 848 states and 1087 transitions. [2022-03-19 06:47:25,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 06:47:25,267 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 67 [2022-03-19 06:47:25,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:25,269 INFO L225 Difference]: With dead ends: 848 [2022-03-19 06:47:25,269 INFO L226 Difference]: Without dead ends: 836 [2022-03-19 06:47:25,269 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:47:25,270 INFO L912 BasicCegarLoop]: 470 mSDtfsCounter, 712 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:25,270 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 950 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 06:47:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-03-19 06:47:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 725. [2022-03-19 06:47:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 573 states have (on average 1.2705061082024434) internal successors, (728), 590 states have internal predecessors, (728), 78 states have call successors, (78), 50 states have call predecessors, (78), 73 states have return successors, (105), 93 states have call predecessors, (105), 72 states have call successors, (105) [2022-03-19 06:47:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 911 transitions. [2022-03-19 06:47:25,554 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 911 transitions. Word has length 67 [2022-03-19 06:47:25,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:25,554 INFO L478 AbstractCegarLoop]: Abstraction has 725 states and 911 transitions. [2022-03-19 06:47:25,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 911 transitions. [2022-03-19 06:47:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 06:47:25,555 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:25,555 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:25,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-19 06:47:25,555 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:25,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:25,556 INFO L85 PathProgramCache]: Analyzing trace with hash 871891881, now seen corresponding path program 1 times [2022-03-19 06:47:25,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:25,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1508186018] [2022-03-19 06:47:25,556 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:25,556 INFO L85 PathProgramCache]: Analyzing trace with hash 871891881, now seen corresponding path program 2 times [2022-03-19 06:47:25,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:25,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458072525] [2022-03-19 06:47:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:25,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:25,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:25,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:25,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:25,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:25,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:47:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:25,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:47:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:25,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:25,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:25,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458072525] [2022-03-19 06:47:25,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458072525] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:25,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:25,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:47:25,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:25,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1508186018] [2022-03-19 06:47:25,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1508186018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:25,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:25,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:47:25,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230861180] [2022-03-19 06:47:25,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:25,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:47:25,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:25,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:47:25,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:47:25,762 INFO L87 Difference]: Start difference. First operand 725 states and 911 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:27,623 INFO L93 Difference]: Finished difference Result 842 states and 1076 transitions. [2022-03-19 06:47:27,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 06:47:27,623 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2022-03-19 06:47:27,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:27,625 INFO L225 Difference]: With dead ends: 842 [2022-03-19 06:47:27,625 INFO L226 Difference]: Without dead ends: 833 [2022-03-19 06:47:27,626 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:47:27,626 INFO L912 BasicCegarLoop]: 472 mSDtfsCounter, 1726 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:27,626 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1733 Valid, 1046 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 06:47:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-03-19 06:47:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 725. [2022-03-19 06:47:27,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 573 states have (on average 1.2670157068062826) internal successors, (726), 590 states have internal predecessors, (726), 78 states have call successors, (78), 50 states have call predecessors, (78), 73 states have return successors, (105), 93 states have call predecessors, (105), 72 states have call successors, (105) [2022-03-19 06:47:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 909 transitions. [2022-03-19 06:47:27,856 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 909 transitions. Word has length 68 [2022-03-19 06:47:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:27,856 INFO L478 AbstractCegarLoop]: Abstraction has 725 states and 909 transitions. [2022-03-19 06:47:27,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:27,857 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 909 transitions. [2022-03-19 06:47:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 06:47:27,858 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:27,858 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:27,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-19 06:47:27,859 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:27,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:27,859 INFO L85 PathProgramCache]: Analyzing trace with hash 881211856, now seen corresponding path program 1 times [2022-03-19 06:47:27,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:27,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [214249208] [2022-03-19 06:47:27,859 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:27,859 INFO L85 PathProgramCache]: Analyzing trace with hash 881211856, now seen corresponding path program 2 times [2022-03-19 06:47:27,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:27,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431538850] [2022-03-19 06:47:27,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:27,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:27,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:27,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:27,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:27,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:28,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:47:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:28,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:47:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:28,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 06:47:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:28,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-19 06:47:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:28,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:28,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:28,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431538850] [2022-03-19 06:47:28,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431538850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:28,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:28,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 06:47:28,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:28,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [214249208] [2022-03-19 06:47:28,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [214249208] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:28,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:28,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 06:47:28,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692901801] [2022-03-19 06:47:28,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:28,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 06:47:28,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:28,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 06:47:28,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:47:28,200 INFO L87 Difference]: Start difference. First operand 725 states and 909 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 10 states have internal predecessors, (54), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 06:47:30,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:30,998 INFO L93 Difference]: Finished difference Result 816 states and 1040 transitions. [2022-03-19 06:47:30,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 06:47:30,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 10 states have internal predecessors, (54), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 74 [2022-03-19 06:47:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:31,000 INFO L225 Difference]: With dead ends: 816 [2022-03-19 06:47:31,000 INFO L226 Difference]: Without dead ends: 791 [2022-03-19 06:47:31,001 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-19 06:47:31,001 INFO L912 BasicCegarLoop]: 458 mSDtfsCounter, 787 mSDsluCounter, 2267 mSDsCounter, 0 mSdLazyCounter, 4941 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2725 SdHoareTripleChecker+Invalid, 5242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 4941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:31,002 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 2725 Invalid, 5242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 4941 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 06:47:31,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-19 06:47:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 723. [2022-03-19 06:47:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 572 states have (on average 1.2657342657342658) internal successors, (724), 589 states have internal predecessors, (724), 77 states have call successors, (77), 50 states have call predecessors, (77), 73 states have return successors, (104), 92 states have call predecessors, (104), 71 states have call successors, (104) [2022-03-19 06:47:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 905 transitions. [2022-03-19 06:47:31,288 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 905 transitions. Word has length 74 [2022-03-19 06:47:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:31,288 INFO L478 AbstractCegarLoop]: Abstraction has 723 states and 905 transitions. [2022-03-19 06:47:31,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 10 states have internal predecessors, (54), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 06:47:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 905 transitions. [2022-03-19 06:47:31,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-19 06:47:31,289 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:31,289 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:31,290 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-19 06:47:31,290 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:31,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:31,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1188604284, now seen corresponding path program 1 times [2022-03-19 06:47:31,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:31,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [222513918] [2022-03-19 06:47:31,290 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:31,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1188604284, now seen corresponding path program 2 times [2022-03-19 06:47:31,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:31,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921275991] [2022-03-19 06:47:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:31,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:31,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:31,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:31,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:31,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:31,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:47:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:31,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 06:47:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:31,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-19 06:47:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:31,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:31,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:31,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921275991] [2022-03-19 06:47:31,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921275991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:31,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:31,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 06:47:31,702 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:31,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [222513918] [2022-03-19 06:47:31,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [222513918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:31,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:31,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 06:47:31,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749298670] [2022-03-19 06:47:31,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:31,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 06:47:31,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:31,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 06:47:31,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-03-19 06:47:31,704 INFO L87 Difference]: Start difference. First operand 723 states and 905 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 11 states have internal predecessors, (52), 4 states have call successors, (10), 10 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 06:47:34,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:34,253 INFO L93 Difference]: Finished difference Result 797 states and 1008 transitions. [2022-03-19 06:47:34,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 06:47:34,254 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 11 states have internal predecessors, (52), 4 states have call successors, (10), 10 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) Word has length 70 [2022-03-19 06:47:34,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:34,256 INFO L225 Difference]: With dead ends: 797 [2022-03-19 06:47:34,256 INFO L226 Difference]: Without dead ends: 770 [2022-03-19 06:47:34,256 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 06:47:34,256 INFO L912 BasicCegarLoop]: 450 mSDtfsCounter, 1479 mSDsluCounter, 2246 mSDsCounter, 0 mSdLazyCounter, 4838 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 5398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 4838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:34,257 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 2696 Invalid, 5398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 4838 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-19 06:47:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-19 06:47:34,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 720. [2022-03-19 06:47:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 570 states have (on average 1.2649122807017543) internal successors, (721), 587 states have internal predecessors, (721), 76 states have call successors, (76), 50 states have call predecessors, (76), 73 states have return successors, (103), 91 states have call predecessors, (103), 70 states have call successors, (103) [2022-03-19 06:47:34,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 900 transitions. [2022-03-19 06:47:34,489 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 900 transitions. Word has length 70 [2022-03-19 06:47:34,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:34,489 INFO L478 AbstractCegarLoop]: Abstraction has 720 states and 900 transitions. [2022-03-19 06:47:34,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 11 states have internal predecessors, (52), 4 states have call successors, (10), 10 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 06:47:34,490 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 900 transitions. [2022-03-19 06:47:34,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-19 06:47:34,491 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:34,491 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:34,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-03-19 06:47:34,491 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:34,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:34,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1748590526, now seen corresponding path program 1 times [2022-03-19 06:47:34,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:34,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1843882930] [2022-03-19 06:47:34,492 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:34,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1748590526, now seen corresponding path program 2 times [2022-03-19 06:47:34,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:34,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425723839] [2022-03-19 06:47:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:34,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:34,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:34,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:34,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:34,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:34,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:34,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:47:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:34,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:34,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:34,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425723839] [2022-03-19 06:47:34,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425723839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:34,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:34,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:47:34,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:34,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1843882930] [2022-03-19 06:47:34,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1843882930] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:34,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:34,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:47:34,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250400142] [2022-03-19 06:47:34,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:34,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 06:47:34,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:34,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 06:47:34,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:47:34,856 INFO L87 Difference]: Start difference. First operand 720 states and 900 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:37,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:37,045 INFO L93 Difference]: Finished difference Result 790 states and 998 transitions. [2022-03-19 06:47:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 06:47:37,046 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) Word has length 72 [2022-03-19 06:47:37,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:37,048 INFO L225 Difference]: With dead ends: 790 [2022-03-19 06:47:37,048 INFO L226 Difference]: Without dead ends: 768 [2022-03-19 06:47:37,048 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:47:37,048 INFO L912 BasicCegarLoop]: 450 mSDtfsCounter, 467 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 4231 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 4408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 4231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:37,049 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 2339 Invalid, 4408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 4231 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 06:47:37,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-03-19 06:47:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 718. [2022-03-19 06:47:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 569 states have (on average 1.2636203866432338) internal successors, (719), 586 states have internal predecessors, (719), 75 states have call successors, (75), 50 states have call predecessors, (75), 73 states have return successors, (102), 90 states have call predecessors, (102), 69 states have call successors, (102) [2022-03-19 06:47:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 896 transitions. [2022-03-19 06:47:37,282 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 896 transitions. Word has length 72 [2022-03-19 06:47:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:37,282 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 896 transitions. [2022-03-19 06:47:37,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:37,283 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 896 transitions. [2022-03-19 06:47:37,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 06:47:37,284 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:37,284 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:37,284 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-03-19 06:47:37,284 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:37,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:37,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1016702716, now seen corresponding path program 1 times [2022-03-19 06:47:37,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:37,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1593461067] [2022-03-19 06:47:37,285 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:37,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1016702716, now seen corresponding path program 2 times [2022-03-19 06:47:37,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:37,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560233923] [2022-03-19 06:47:37,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:37,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:37,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:37,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:37,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:37,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:37,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:47:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:37,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 06:47:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:37,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:37,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:37,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560233923] [2022-03-19 06:47:37,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560233923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:37,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:37,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:47:37,658 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:37,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1593461067] [2022-03-19 06:47:37,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1593461067] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:37,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:37,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:47:37,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966404414] [2022-03-19 06:47:37,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:37,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 06:47:37,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:37,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 06:47:37,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:47:37,661 INFO L87 Difference]: Start difference. First operand 718 states and 896 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:40,021 INFO L93 Difference]: Finished difference Result 785 states and 991 transitions. [2022-03-19 06:47:40,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 06:47:40,022 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2022-03-19 06:47:40,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:40,023 INFO L225 Difference]: With dead ends: 785 [2022-03-19 06:47:40,023 INFO L226 Difference]: Without dead ends: 754 [2022-03-19 06:47:40,024 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:47:40,024 INFO L912 BasicCegarLoop]: 440 mSDtfsCounter, 239 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 4444 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 4537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:40,024 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 2240 Invalid, 4537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4444 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 06:47:40,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-03-19 06:47:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 706. [2022-03-19 06:47:40,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 560 states have (on average 1.2642857142857142) internal successors, (708), 577 states have internal predecessors, (708), 73 states have call successors, (73), 50 states have call predecessors, (73), 72 states have return successors, (99), 87 states have call predecessors, (99), 67 states have call successors, (99) [2022-03-19 06:47:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 880 transitions. [2022-03-19 06:47:40,304 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 880 transitions. Word has length 69 [2022-03-19 06:47:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:40,304 INFO L478 AbstractCegarLoop]: Abstraction has 706 states and 880 transitions. [2022-03-19 06:47:40,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 880 transitions. [2022-03-19 06:47:40,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 06:47:40,306 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:40,306 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:40,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-03-19 06:47:40,306 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:40,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:40,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1926600916, now seen corresponding path program 1 times [2022-03-19 06:47:40,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:40,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2002630717] [2022-03-19 06:47:40,307 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:40,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1926600916, now seen corresponding path program 2 times [2022-03-19 06:47:40,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:40,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792218041] [2022-03-19 06:47:40,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:40,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:40,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:40,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:40,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:40,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:40,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:40,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 06:47:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:40,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 06:47:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:40,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:40,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792218041] [2022-03-19 06:47:40,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792218041] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:40,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:40,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:47:40,492 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:40,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2002630717] [2022-03-19 06:47:40,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2002630717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:40,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:40,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:47:40,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122791548] [2022-03-19 06:47:40,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:40,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:47:40,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:40,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:47:40,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:47:40,494 INFO L87 Difference]: Start difference. First operand 706 states and 880 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:41,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:41,972 INFO L93 Difference]: Finished difference Result 788 states and 988 transitions. [2022-03-19 06:47:41,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:47:41,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-03-19 06:47:41,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:41,975 INFO L225 Difference]: With dead ends: 788 [2022-03-19 06:47:41,975 INFO L226 Difference]: Without dead ends: 749 [2022-03-19 06:47:41,975 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:47:41,975 INFO L912 BasicCegarLoop]: 420 mSDtfsCounter, 491 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:41,975 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 1071 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 06:47:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-03-19 06:47:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 701. [2022-03-19 06:47:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 556 states have (on average 1.264388489208633) internal successors, (703), 573 states have internal predecessors, (703), 72 states have call successors, (72), 50 states have call predecessors, (72), 72 states have return successors, (98), 86 states have call predecessors, (98), 66 states have call successors, (98) [2022-03-19 06:47:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 873 transitions. [2022-03-19 06:47:42,195 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 873 transitions. Word has length 69 [2022-03-19 06:47:42,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:42,195 INFO L478 AbstractCegarLoop]: Abstraction has 701 states and 873 transitions. [2022-03-19 06:47:42,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:42,195 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 873 transitions. [2022-03-19 06:47:42,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 06:47:42,196 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:42,196 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:42,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-03-19 06:47:42,197 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:42,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:42,197 INFO L85 PathProgramCache]: Analyzing trace with hash -51645449, now seen corresponding path program 1 times [2022-03-19 06:47:42,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:42,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [26531264] [2022-03-19 06:47:42,197 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:42,197 INFO L85 PathProgramCache]: Analyzing trace with hash -51645449, now seen corresponding path program 2 times [2022-03-19 06:47:42,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:42,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605486484] [2022-03-19 06:47:42,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:42,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:42,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:42,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:42,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:42,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:42,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:42,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 06:47:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:42,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 06:47:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:42,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:42,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605486484] [2022-03-19 06:47:42,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605486484] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:42,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:42,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 06:47:42,463 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:42,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [26531264] [2022-03-19 06:47:42,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [26531264] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:42,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:42,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 06:47:42,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074035654] [2022-03-19 06:47:42,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:42,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 06:47:42,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:42,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 06:47:42,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:47:42,464 INFO L87 Difference]: Start difference. First operand 701 states and 873 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:44,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:44,302 INFO L93 Difference]: Finished difference Result 776 states and 976 transitions. [2022-03-19 06:47:44,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 06:47:44,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-03-19 06:47:44,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:44,305 INFO L225 Difference]: With dead ends: 776 [2022-03-19 06:47:44,305 INFO L226 Difference]: Without dead ends: 746 [2022-03-19 06:47:44,306 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:47:44,306 INFO L912 BasicCegarLoop]: 435 mSDtfsCounter, 705 mSDsluCounter, 1624 mSDsCounter, 0 mSdLazyCounter, 3150 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 2059 SdHoareTripleChecker+Invalid, 3401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 3150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:44,306 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 2059 Invalid, 3401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 3150 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 06:47:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-03-19 06:47:44,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 698. [2022-03-19 06:47:44,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 554 states have (on average 1.263537906137184) internal successors, (700), 571 states have internal predecessors, (700), 71 states have call successors, (71), 50 states have call predecessors, (71), 72 states have return successors, (97), 85 states have call predecessors, (97), 65 states have call successors, (97) [2022-03-19 06:47:44,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 868 transitions. [2022-03-19 06:47:44,592 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 868 transitions. Word has length 69 [2022-03-19 06:47:44,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:44,592 INFO L478 AbstractCegarLoop]: Abstraction has 698 states and 868 transitions. [2022-03-19 06:47:44,592 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:44,592 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 868 transitions. [2022-03-19 06:47:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 06:47:44,593 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:44,593 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:44,593 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-03-19 06:47:44,593 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:44,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:44,593 INFO L85 PathProgramCache]: Analyzing trace with hash 618518284, now seen corresponding path program 1 times [2022-03-19 06:47:44,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:44,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [453753126] [2022-03-19 06:47:44,594 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:44,594 INFO L85 PathProgramCache]: Analyzing trace with hash 618518284, now seen corresponding path program 2 times [2022-03-19 06:47:44,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:44,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511543208] [2022-03-19 06:47:44,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:44,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:44,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:44,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:44,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:44,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:44,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:47:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:44,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:47:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:44,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:44,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:44,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511543208] [2022-03-19 06:47:44,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511543208] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:44,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:44,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 06:47:44,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:44,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [453753126] [2022-03-19 06:47:44,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [453753126] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:44,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:44,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 06:47:44,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152871658] [2022-03-19 06:47:44,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:44,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 06:47:44,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:44,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 06:47:44,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:47:44,850 INFO L87 Difference]: Start difference. First operand 698 states and 868 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:46,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:46,828 INFO L93 Difference]: Finished difference Result 756 states and 950 transitions. [2022-03-19 06:47:46,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 06:47:46,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2022-03-19 06:47:46,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:46,830 INFO L225 Difference]: With dead ends: 756 [2022-03-19 06:47:46,830 INFO L226 Difference]: Without dead ends: 750 [2022-03-19 06:47:46,830 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-19 06:47:46,831 INFO L912 BasicCegarLoop]: 374 mSDtfsCounter, 789 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 3749 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 4020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 3749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:46,831 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 1669 Invalid, 4020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 3749 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 06:47:46,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-03-19 06:47:47,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 695. [2022-03-19 06:47:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 551 states have (on average 1.2577132486388385) internal successors, (693), 568 states have internal predecessors, (693), 71 states have call successors, (71), 50 states have call predecessors, (71), 72 states have return successors, (97), 85 states have call predecessors, (97), 65 states have call successors, (97) [2022-03-19 06:47:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 861 transitions. [2022-03-19 06:47:47,047 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 861 transitions. Word has length 69 [2022-03-19 06:47:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:47,047 INFO L478 AbstractCegarLoop]: Abstraction has 695 states and 861 transitions. [2022-03-19 06:47:47,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 861 transitions. [2022-03-19 06:47:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 06:47:47,048 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:47,048 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:47,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-03-19 06:47:47,049 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:47,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:47,049 INFO L85 PathProgramCache]: Analyzing trace with hash 618241454, now seen corresponding path program 1 times [2022-03-19 06:47:47,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:47,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1635601574] [2022-03-19 06:47:47,049 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:47,049 INFO L85 PathProgramCache]: Analyzing trace with hash 618241454, now seen corresponding path program 2 times [2022-03-19 06:47:47,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:47,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114324192] [2022-03-19 06:47:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:47,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:47,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:47,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:47,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:47,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:47,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:47:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:47,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:47:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:47,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:47,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:47,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114324192] [2022-03-19 06:47:47,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114324192] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:47,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:47,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:47:47,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:47,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1635601574] [2022-03-19 06:47:47,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1635601574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:47,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:47,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:47:47,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941551000] [2022-03-19 06:47:47,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:47,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:47:47,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:47,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:47:47,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:47:47,280 INFO L87 Difference]: Start difference. First operand 695 states and 861 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:48,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:48,974 INFO L93 Difference]: Finished difference Result 805 states and 1014 transitions. [2022-03-19 06:47:48,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 06:47:48,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-03-19 06:47:48,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:48,976 INFO L225 Difference]: With dead ends: 805 [2022-03-19 06:47:48,976 INFO L226 Difference]: Without dead ends: 770 [2022-03-19 06:47:48,976 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2022-03-19 06:47:48,976 INFO L912 BasicCegarLoop]: 434 mSDtfsCounter, 1617 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1624 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:48,977 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1624 Valid, 925 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 06:47:48,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-19 06:47:49,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 666. [2022-03-19 06:47:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 527 states have (on average 1.256166982922201) internal successors, (662), 543 states have internal predecessors, (662), 70 states have call successors, (70), 49 states have call predecessors, (70), 68 states have return successors, (93), 81 states have call predecessors, (93), 64 states have call successors, (93) [2022-03-19 06:47:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 825 transitions. [2022-03-19 06:47:49,184 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 825 transitions. Word has length 69 [2022-03-19 06:47:49,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:49,184 INFO L478 AbstractCegarLoop]: Abstraction has 666 states and 825 transitions. [2022-03-19 06:47:49,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:47:49,185 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 825 transitions. [2022-03-19 06:47:49,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 06:47:49,186 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:49,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:49,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-03-19 06:47:49,187 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:49,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:49,187 INFO L85 PathProgramCache]: Analyzing trace with hash 711441589, now seen corresponding path program 1 times [2022-03-19 06:47:49,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:49,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [306751478] [2022-03-19 06:47:49,188 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:49,188 INFO L85 PathProgramCache]: Analyzing trace with hash 711441589, now seen corresponding path program 2 times [2022-03-19 06:47:49,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:49,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693670905] [2022-03-19 06:47:49,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:49,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:49,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:49,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:49,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:49,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:49,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:47:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:49,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:47:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:49,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:49,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:49,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693670905] [2022-03-19 06:47:49,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693670905] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:49,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:49,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:47:49,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:49,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [306751478] [2022-03-19 06:47:49,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [306751478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:49,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:49,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:47:49,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599300786] [2022-03-19 06:47:49,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:49,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:47:49,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:49,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:47:49,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:47:49,358 INFO L87 Difference]: Start difference. First operand 666 states and 825 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:50,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:50,549 INFO L93 Difference]: Finished difference Result 740 states and 928 transitions. [2022-03-19 06:47:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 06:47:50,550 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2022-03-19 06:47:50,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:50,552 INFO L225 Difference]: With dead ends: 740 [2022-03-19 06:47:50,552 INFO L226 Difference]: Without dead ends: 700 [2022-03-19 06:47:50,552 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:47:50,552 INFO L912 BasicCegarLoop]: 431 mSDtfsCounter, 608 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:50,552 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 821 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 06:47:50,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-03-19 06:47:50,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 648. [2022-03-19 06:47:50,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 514 states have (on average 1.2490272373540856) internal successors, (642), 529 states have internal predecessors, (642), 69 states have call successors, (69), 48 states have call predecessors, (69), 64 states have return successors, (89), 77 states have call predecessors, (89), 63 states have call successors, (89) [2022-03-19 06:47:50,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 800 transitions. [2022-03-19 06:47:50,768 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 800 transitions. Word has length 69 [2022-03-19 06:47:50,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:50,769 INFO L478 AbstractCegarLoop]: Abstraction has 648 states and 800 transitions. [2022-03-19 06:47:50,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:50,769 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 800 transitions. [2022-03-19 06:47:50,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 06:47:50,770 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:50,770 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:50,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-03-19 06:47:50,770 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:50,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:50,770 INFO L85 PathProgramCache]: Analyzing trace with hash -645591887, now seen corresponding path program 1 times [2022-03-19 06:47:50,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:50,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [69992573] [2022-03-19 06:47:50,771 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:50,771 INFO L85 PathProgramCache]: Analyzing trace with hash -645591887, now seen corresponding path program 2 times [2022-03-19 06:47:50,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:50,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968070460] [2022-03-19 06:47:50,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:50,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:50,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:50,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:50,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:50,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:50,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:47:50,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:50,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 06:47:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:50,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 06:47:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:50,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:50,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:50,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968070460] [2022-03-19 06:47:50,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968070460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:50,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:50,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:47:50,951 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:50,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [69992573] [2022-03-19 06:47:50,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [69992573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:50,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:50,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:47:50,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982017193] [2022-03-19 06:47:50,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:50,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:47:50,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:50,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:47:50,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:47:50,952 INFO L87 Difference]: Start difference. First operand 648 states and 800 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 06:47:52,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:52,320 INFO L93 Difference]: Finished difference Result 738 states and 917 transitions. [2022-03-19 06:47:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 06:47:52,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-03-19 06:47:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:52,322 INFO L225 Difference]: With dead ends: 738 [2022-03-19 06:47:52,322 INFO L226 Difference]: Without dead ends: 700 [2022-03-19 06:47:52,322 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-03-19 06:47:52,322 INFO L912 BasicCegarLoop]: 419 mSDtfsCounter, 273 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:52,323 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 1251 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 06:47:52,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-03-19 06:47:52,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 648. [2022-03-19 06:47:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 514 states have (on average 1.2470817120622568) internal successors, (641), 529 states have internal predecessors, (641), 69 states have call successors, (69), 48 states have call predecessors, (69), 64 states have return successors, (89), 77 states have call predecessors, (89), 63 states have call successors, (89) [2022-03-19 06:47:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 799 transitions. [2022-03-19 06:47:52,540 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 799 transitions. Word has length 71 [2022-03-19 06:47:52,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:52,540 INFO L478 AbstractCegarLoop]: Abstraction has 648 states and 799 transitions. [2022-03-19 06:47:52,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 06:47:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 799 transitions. [2022-03-19 06:47:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 06:47:52,541 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:52,541 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:52,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-03-19 06:47:52,541 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:52,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:52,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1405392111, now seen corresponding path program 1 times [2022-03-19 06:47:52,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:52,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1030120025] [2022-03-19 06:47:52,542 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:52,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1405392111, now seen corresponding path program 2 times [2022-03-19 06:47:52,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:52,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908034634] [2022-03-19 06:47:52,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:52,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:52,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:52,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:52,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:52,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:52,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:47:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:52,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 06:47:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:52,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 06:47:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:52,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:52,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:52,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908034634] [2022-03-19 06:47:52,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908034634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:52,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:52,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 06:47:52,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:52,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1030120025] [2022-03-19 06:47:52,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1030120025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:52,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:52,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 06:47:52,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495448939] [2022-03-19 06:47:52,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:52,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 06:47:52,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:52,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 06:47:52,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:47:52,837 INFO L87 Difference]: Start difference. First operand 648 states and 799 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 06:47:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:54,878 INFO L93 Difference]: Finished difference Result 736 states and 923 transitions. [2022-03-19 06:47:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 06:47:54,878 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 71 [2022-03-19 06:47:54,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:54,880 INFO L225 Difference]: With dead ends: 736 [2022-03-19 06:47:54,880 INFO L226 Difference]: Without dead ends: 698 [2022-03-19 06:47:54,880 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-19 06:47:54,880 INFO L912 BasicCegarLoop]: 429 mSDtfsCounter, 936 mSDsluCounter, 2023 mSDsCounter, 0 mSdLazyCounter, 3985 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 2452 SdHoareTripleChecker+Invalid, 4330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 3985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:54,880 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 2452 Invalid, 4330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 3985 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 06:47:54,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-03-19 06:47:55,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 643. [2022-03-19 06:47:55,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 510 states have (on average 1.2431372549019608) internal successors, (634), 525 states have internal predecessors, (634), 68 states have call successors, (68), 48 states have call predecessors, (68), 64 states have return successors, (87), 76 states have call predecessors, (87), 62 states have call successors, (87) [2022-03-19 06:47:55,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 789 transitions. [2022-03-19 06:47:55,123 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 789 transitions. Word has length 71 [2022-03-19 06:47:55,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:55,123 INFO L478 AbstractCegarLoop]: Abstraction has 643 states and 789 transitions. [2022-03-19 06:47:55,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 06:47:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 789 transitions. [2022-03-19 06:47:55,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 06:47:55,124 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:55,124 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:55,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-03-19 06:47:55,124 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:55,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:55,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1361964370, now seen corresponding path program 1 times [2022-03-19 06:47:55,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:55,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1419377935] [2022-03-19 06:47:55,125 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:55,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1361964370, now seen corresponding path program 2 times [2022-03-19 06:47:55,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:55,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939853281] [2022-03-19 06:47:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:55,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:55,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:55,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:55,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:55,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:55,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:47:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:55,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 06:47:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:55,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 06:47:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:55,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:55,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:55,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939853281] [2022-03-19 06:47:55,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939853281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:55,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:55,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:47:55,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:55,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1419377935] [2022-03-19 06:47:55,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1419377935] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:55,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:55,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:47:55,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090637222] [2022-03-19 06:47:55,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:55,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:47:55,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:55,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:47:55,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:47:55,352 INFO L87 Difference]: Start difference. First operand 643 states and 789 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 06:47:56,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:56,793 INFO L93 Difference]: Finished difference Result 731 states and 903 transitions. [2022-03-19 06:47:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:47:56,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-03-19 06:47:56,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:56,794 INFO L225 Difference]: With dead ends: 731 [2022-03-19 06:47:56,794 INFO L226 Difference]: Without dead ends: 687 [2022-03-19 06:47:56,795 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-03-19 06:47:56,795 INFO L912 BasicCegarLoop]: 408 mSDtfsCounter, 451 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:56,795 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 1388 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 06:47:56,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-03-19 06:47:57,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 637. [2022-03-19 06:47:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 505 states have (on average 1.2435643564356436) internal successors, (628), 520 states have internal predecessors, (628), 67 states have call successors, (67), 48 states have call predecessors, (67), 64 states have return successors, (86), 75 states have call predecessors, (86), 61 states have call successors, (86) [2022-03-19 06:47:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 781 transitions. [2022-03-19 06:47:57,009 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 781 transitions. Word has length 71 [2022-03-19 06:47:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:57,010 INFO L478 AbstractCegarLoop]: Abstraction has 637 states and 781 transitions. [2022-03-19 06:47:57,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 06:47:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 781 transitions. [2022-03-19 06:47:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 06:47:57,011 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:57,011 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:57,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-03-19 06:47:57,011 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:57,012 INFO L85 PathProgramCache]: Analyzing trace with hash 696849523, now seen corresponding path program 1 times [2022-03-19 06:47:57,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:57,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2001291422] [2022-03-19 06:47:57,012 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:57,012 INFO L85 PathProgramCache]: Analyzing trace with hash 696849523, now seen corresponding path program 2 times [2022-03-19 06:47:57,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:57,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474816521] [2022-03-19 06:47:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:57,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:57,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:57,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:57,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:57,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:57,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:47:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:57,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:47:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:57,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:57,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:57,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474816521] [2022-03-19 06:47:57,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474816521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:57,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:57,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 06:47:57,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:57,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2001291422] [2022-03-19 06:47:57,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2001291422] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:57,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:57,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 06:47:57,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766854006] [2022-03-19 06:47:57,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:57,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 06:47:57,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:57,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 06:47:57,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:47:57,337 INFO L87 Difference]: Start difference. First operand 637 states and 781 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:59,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:47:59,135 INFO L93 Difference]: Finished difference Result 868 states and 1068 transitions. [2022-03-19 06:47:59,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 06:47:59,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) Word has length 71 [2022-03-19 06:47:59,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:47:59,137 INFO L225 Difference]: With dead ends: 868 [2022-03-19 06:47:59,137 INFO L226 Difference]: Without dead ends: 729 [2022-03-19 06:47:59,137 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-19 06:47:59,137 INFO L912 BasicCegarLoop]: 382 mSDtfsCounter, 562 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 3133 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1931 SdHoareTripleChecker+Invalid, 3326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 06:47:59,138 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 1931 Invalid, 3326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3133 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 06:47:59,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-03-19 06:47:59,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 643. [2022-03-19 06:47:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 511 states have (on average 1.2328767123287672) internal successors, (630), 526 states have internal predecessors, (630), 67 states have call successors, (67), 48 states have call predecessors, (67), 64 states have return successors, (86), 75 states have call predecessors, (86), 61 states have call successors, (86) [2022-03-19 06:47:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 783 transitions. [2022-03-19 06:47:59,364 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 783 transitions. Word has length 71 [2022-03-19 06:47:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:47:59,364 INFO L478 AbstractCegarLoop]: Abstraction has 643 states and 783 transitions. [2022-03-19 06:47:59,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 06:47:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 783 transitions. [2022-03-19 06:47:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 06:47:59,366 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:47:59,366 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:47:59,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-03-19 06:47:59,366 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:47:59,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:47:59,366 INFO L85 PathProgramCache]: Analyzing trace with hash -403390025, now seen corresponding path program 1 times [2022-03-19 06:47:59,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:59,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1849434609] [2022-03-19 06:47:59,367 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:47:59,367 INFO L85 PathProgramCache]: Analyzing trace with hash -403390025, now seen corresponding path program 2 times [2022-03-19 06:47:59,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:47:59,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894517475] [2022-03-19 06:47:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:47:59,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:47:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:59,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:47:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:59,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:47:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:59,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:47:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:59,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:59,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:47:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:59,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 06:47:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:59,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:47:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:59,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:47:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:47:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:47:59,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:47:59,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894517475] [2022-03-19 06:47:59,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894517475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:59,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:59,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:47:59,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:47:59,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1849434609] [2022-03-19 06:47:59,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1849434609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:47:59,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:47:59,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:47:59,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032612967] [2022-03-19 06:47:59,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:47:59,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:47:59,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:47:59,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:47:59,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:47:59,564 INFO L87 Difference]: Start difference. First operand 643 states and 783 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 06:48:00,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:48:00,776 INFO L93 Difference]: Finished difference Result 731 states and 897 transitions. [2022-03-19 06:48:00,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:48:00,776 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 73 [2022-03-19 06:48:00,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:48:00,778 INFO L225 Difference]: With dead ends: 731 [2022-03-19 06:48:00,778 INFO L226 Difference]: Without dead ends: 681 [2022-03-19 06:48:00,778 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-03-19 06:48:00,779 INFO L912 BasicCegarLoop]: 399 mSDtfsCounter, 614 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 06:48:00,779 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1229 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 06:48:00,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-03-19 06:48:00,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 631. [2022-03-19 06:48:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 500 states have (on average 1.228) internal successors, (614), 515 states have internal predecessors, (614), 66 states have call successors, (66), 48 states have call predecessors, (66), 64 states have return successors, (85), 74 states have call predecessors, (85), 60 states have call successors, (85) [2022-03-19 06:48:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 765 transitions. [2022-03-19 06:48:00,993 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 765 transitions. Word has length 73 [2022-03-19 06:48:00,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:48:00,993 INFO L478 AbstractCegarLoop]: Abstraction has 631 states and 765 transitions. [2022-03-19 06:48:00,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 06:48:00,993 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 765 transitions. [2022-03-19 06:48:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 06:48:00,994 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:48:00,994 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:48:00,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-03-19 06:48:00,995 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:48:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:48:00,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1773843285, now seen corresponding path program 1 times [2022-03-19 06:48:00,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:48:00,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1294702546] [2022-03-19 06:48:00,995 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:48:00,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1773843285, now seen corresponding path program 2 times [2022-03-19 06:48:00,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:48:00,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216736575] [2022-03-19 06:48:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:48:00,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:48:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:01,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:48:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:01,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:48:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:01,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:48:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:01,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:48:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:01,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:48:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:01,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:48:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:01,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:48:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:01,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:48:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:48:01,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:48:01,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216736575] [2022-03-19 06:48:01,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216736575] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:48:01,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:48:01,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:48:01,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:48:01,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1294702546] [2022-03-19 06:48:01,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1294702546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:48:01,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:48:01,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:48:01,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140075724] [2022-03-19 06:48:01,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:48:01,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 06:48:01,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:48:01,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 06:48:01,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:48:01,317 INFO L87 Difference]: Start difference. First operand 631 states and 765 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-19 06:48:05,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:48:05,167 INFO L93 Difference]: Finished difference Result 1532 states and 1866 transitions. [2022-03-19 06:48:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 06:48:05,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2022-03-19 06:48:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:48:05,170 INFO L225 Difference]: With dead ends: 1532 [2022-03-19 06:48:05,170 INFO L226 Difference]: Without dead ends: 1385 [2022-03-19 06:48:05,171 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=676, Invalid=2630, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 06:48:05,171 INFO L912 BasicCegarLoop]: 418 mSDtfsCounter, 3349 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 3678 mSolverCounterSat, 1104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3354 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 4782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1104 IncrementalHoareTripleChecker+Valid, 3678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:48:05,171 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3354 Valid, 1381 Invalid, 4782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1104 Valid, 3678 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 06:48:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2022-03-19 06:48:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1006. [2022-03-19 06:48:05,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 801 states have (on average 1.2459425717852683) internal successors, (998), 826 states have internal predecessors, (998), 101 states have call successors, (101), 79 states have call predecessors, (101), 103 states have return successors, (136), 107 states have call predecessors, (136), 95 states have call successors, (136) [2022-03-19 06:48:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1235 transitions. [2022-03-19 06:48:05,514 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1235 transitions. Word has length 73 [2022-03-19 06:48:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:48:05,514 INFO L478 AbstractCegarLoop]: Abstraction has 1006 states and 1235 transitions. [2022-03-19 06:48:05,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-19 06:48:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1235 transitions. [2022-03-19 06:48:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 06:48:05,516 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:48:05,516 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:48:05,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-03-19 06:48:05,516 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:48:05,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:48:05,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1094571031, now seen corresponding path program 1 times [2022-03-19 06:48:05,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:48:05,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1003387368] [2022-03-19 06:48:05,517 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:48:05,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1094571031, now seen corresponding path program 2 times [2022-03-19 06:48:05,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:48:05,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133430322] [2022-03-19 06:48:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:48:05,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:48:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:05,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:48:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:05,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:48:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:05,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:48:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:05,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:48:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:05,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:48:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:05,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:48:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:05,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:48:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:05,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:48:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:48:05,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:48:05,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133430322] [2022-03-19 06:48:05,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133430322] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:48:05,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:48:05,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:48:05,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:48:05,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1003387368] [2022-03-19 06:48:05,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1003387368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:48:05,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:48:05,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:48:05,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30797277] [2022-03-19 06:48:05,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:48:05,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 06:48:05,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:48:05,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 06:48:05,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:48:05,704 INFO L87 Difference]: Start difference. First operand 1006 states and 1235 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-19 06:48:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:48:08,275 INFO L93 Difference]: Finished difference Result 1405 states and 1720 transitions. [2022-03-19 06:48:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 06:48:08,275 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2022-03-19 06:48:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:48:08,277 INFO L225 Difference]: With dead ends: 1405 [2022-03-19 06:48:08,277 INFO L226 Difference]: Without dead ends: 1275 [2022-03-19 06:48:08,278 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-03-19 06:48:08,278 INFO L912 BasicCegarLoop]: 697 mSDtfsCounter, 1989 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1993 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 06:48:08,278 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1993 Valid, 1330 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 06:48:08,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-03-19 06:48:08,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1099. [2022-03-19 06:48:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 874 states have (on average 1.2356979405034325) internal successors, (1080), 894 states have internal predecessors, (1080), 115 states have call successors, (115), 83 states have call predecessors, (115), 109 states have return successors, (152), 126 states have call predecessors, (152), 109 states have call successors, (152) [2022-03-19 06:48:08,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1347 transitions. [2022-03-19 06:48:08,705 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1347 transitions. Word has length 73 [2022-03-19 06:48:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:48:08,705 INFO L478 AbstractCegarLoop]: Abstraction has 1099 states and 1347 transitions. [2022-03-19 06:48:08,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-19 06:48:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1347 transitions. [2022-03-19 06:48:08,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 06:48:08,707 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:48:08,707 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:48:08,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-03-19 06:48:08,707 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:48:08,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:48:08,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2057821935, now seen corresponding path program 1 times [2022-03-19 06:48:08,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:48:08,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [108467871] [2022-03-19 06:48:08,708 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:48:08,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2057821935, now seen corresponding path program 2 times [2022-03-19 06:48:08,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:48:08,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471344612] [2022-03-19 06:48:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:48:08,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:48:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:08,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:48:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:08,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:48:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:08,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:48:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:08,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:48:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:08,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:48:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:08,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:48:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:08,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:48:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:08,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 06:48:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:09,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:48:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:48:09,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:48:09,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471344612] [2022-03-19 06:48:09,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471344612] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:48:09,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:48:09,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 06:48:09,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:48:09,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [108467871] [2022-03-19 06:48:09,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [108467871] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:48:09,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:48:09,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 06:48:09,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242688972] [2022-03-19 06:48:09,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:48:09,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 06:48:09,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:48:09,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 06:48:09,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:48:09,016 INFO L87 Difference]: Start difference. First operand 1099 states and 1347 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 10 states have internal predecessors, (57), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 06:48:11,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:48:11,234 INFO L93 Difference]: Finished difference Result 1233 states and 1536 transitions. [2022-03-19 06:48:11,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 06:48:11,235 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 10 states have internal predecessors, (57), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2022-03-19 06:48:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:48:11,237 INFO L225 Difference]: With dead ends: 1233 [2022-03-19 06:48:11,237 INFO L226 Difference]: Without dead ends: 1191 [2022-03-19 06:48:11,237 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-19 06:48:11,237 INFO L912 BasicCegarLoop]: 397 mSDtfsCounter, 790 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 3514 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 2285 SdHoareTripleChecker+Invalid, 3817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 3514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 06:48:11,238 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 2285 Invalid, 3817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 3514 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 06:48:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2022-03-19 06:48:11,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1095. [2022-03-19 06:48:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 870 states have (on average 1.2344827586206897) internal successors, (1074), 890 states have internal predecessors, (1074), 115 states have call successors, (115), 83 states have call predecessors, (115), 109 states have return successors, (152), 126 states have call predecessors, (152), 109 states have call successors, (152) [2022-03-19 06:48:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1341 transitions. [2022-03-19 06:48:11,659 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1341 transitions. Word has length 77 [2022-03-19 06:48:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:48:11,659 INFO L478 AbstractCegarLoop]: Abstraction has 1095 states and 1341 transitions. [2022-03-19 06:48:11,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 10 states have internal predecessors, (57), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 06:48:11,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1341 transitions. [2022-03-19 06:48:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-19 06:48:11,661 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:48:11,661 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:48:11,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-03-19 06:48:11,661 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:48:11,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:48:11,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1891319547, now seen corresponding path program 1 times [2022-03-19 06:48:11,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:48:11,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [515800733] [2022-03-19 06:48:11,662 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:48:11,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1891319547, now seen corresponding path program 2 times [2022-03-19 06:48:11,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:48:11,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933725061] [2022-03-19 06:48:11,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:48:11,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:48:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:11,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:48:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:11,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:48:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:11,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:48:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:11,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:48:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:11,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:48:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:11,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:48:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:11,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:48:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:11,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 06:48:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:11,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:48:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:48:11,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:48:11,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933725061] [2022-03-19 06:48:11,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933725061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:48:11,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:48:11,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:48:11,876 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:48:11,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [515800733] [2022-03-19 06:48:11,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [515800733] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:48:11,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:48:11,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:48:11,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848053501] [2022-03-19 06:48:11,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:48:11,877 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:48:11,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:48:11,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:48:11,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:48:11,878 INFO L87 Difference]: Start difference. First operand 1095 states and 1341 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 06:48:13,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:48:13,291 INFO L93 Difference]: Finished difference Result 1230 states and 1517 transitions. [2022-03-19 06:48:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:48:13,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 78 [2022-03-19 06:48:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:48:13,294 INFO L225 Difference]: With dead ends: 1230 [2022-03-19 06:48:13,294 INFO L226 Difference]: Without dead ends: 1131 [2022-03-19 06:48:13,294 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-03-19 06:48:13,294 INFO L912 BasicCegarLoop]: 374 mSDtfsCounter, 398 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 06:48:13,295 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 958 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 06:48:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-03-19 06:48:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1061. [2022-03-19 06:48:13,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 842 states have (on average 1.2304038004750595) internal successors, (1036), 862 states have internal predecessors, (1036), 109 states have call successors, (109), 83 states have call predecessors, (109), 109 states have return successors, (144), 120 states have call predecessors, (144), 103 states have call successors, (144) [2022-03-19 06:48:13,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1289 transitions. [2022-03-19 06:48:13,669 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1289 transitions. Word has length 78 [2022-03-19 06:48:13,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:48:13,669 INFO L478 AbstractCegarLoop]: Abstraction has 1061 states and 1289 transitions. [2022-03-19 06:48:13,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 06:48:13,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1289 transitions. [2022-03-19 06:48:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 06:48:13,672 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:48:13,672 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:48:13,672 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-03-19 06:48:13,672 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:48:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:48:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash -888306664, now seen corresponding path program 1 times [2022-03-19 06:48:13,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:48:13,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1180192907] [2022-03-19 06:48:13,673 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:48:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash -888306664, now seen corresponding path program 2 times [2022-03-19 06:48:13,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:48:13,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101846661] [2022-03-19 06:48:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:48:13,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:48:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:13,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:48:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:13,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:48:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:13,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:48:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:13,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:48:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:13,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:48:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:13,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:48:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:13,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 06:48:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:13,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 06:48:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:13,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:48:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:48:13,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:48:13,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101846661] [2022-03-19 06:48:13,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101846661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:48:13,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:48:13,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:48:13,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:48:13,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1180192907] [2022-03-19 06:48:13,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1180192907] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:48:13,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:48:13,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:48:13,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027805738] [2022-03-19 06:48:13,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:48:13,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 06:48:13,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:48:13,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 06:48:13,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:48:13,929 INFO L87 Difference]: Start difference. First operand 1061 states and 1289 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 06:48:15,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:48:15,401 INFO L93 Difference]: Finished difference Result 1156 states and 1411 transitions. [2022-03-19 06:48:15,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:48:15,402 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 75 [2022-03-19 06:48:15,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:48:15,404 INFO L225 Difference]: With dead ends: 1156 [2022-03-19 06:48:15,404 INFO L226 Difference]: Without dead ends: 1065 [2022-03-19 06:48:15,404 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:48:15,405 INFO L912 BasicCegarLoop]: 346 mSDtfsCounter, 498 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 06:48:15,405 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 1422 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 06:48:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-03-19 06:48:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1013. [2022-03-19 06:48:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 808 states have (on average 1.2326732673267327) internal successors, (996), 828 states have internal predecessors, (996), 99 states have call successors, (99), 79 states have call predecessors, (99), 105 states have return successors, (132), 110 states have call predecessors, (132), 93 states have call successors, (132) [2022-03-19 06:48:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1227 transitions. [2022-03-19 06:48:15,748 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1227 transitions. Word has length 75 [2022-03-19 06:48:15,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:48:15,748 INFO L478 AbstractCegarLoop]: Abstraction has 1013 states and 1227 transitions. [2022-03-19 06:48:15,748 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 06:48:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1227 transitions. [2022-03-19 06:48:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 06:48:15,750 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:48:15,750 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:48:15,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-03-19 06:48:15,750 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:48:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:48:15,750 INFO L85 PathProgramCache]: Analyzing trace with hash 384049071, now seen corresponding path program 1 times [2022-03-19 06:48:15,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:48:15,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1066290222] [2022-03-19 06:48:15,750 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:48:15,751 INFO L85 PathProgramCache]: Analyzing trace with hash 384049071, now seen corresponding path program 2 times [2022-03-19 06:48:15,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:48:15,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490404983] [2022-03-19 06:48:15,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:48:15,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:48:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:15,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:48:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:15,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:48:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:15,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:48:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:15,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:48:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:15,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 06:48:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:15,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 06:48:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:15,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 06:48:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:48:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:48:15,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:48:15,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490404983] [2022-03-19 06:48:15,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490404983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:48:15,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:48:15,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:48:15,918 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:48:15,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1066290222] [2022-03-19 06:48:15,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1066290222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:48:15,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:48:15,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:48:15,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891702125] [2022-03-19 06:48:15,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:48:15,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:48:15,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:48:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:48:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:48:15,920 INFO L87 Difference]: Start difference. First operand 1013 states and 1227 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:48:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:48:16,984 INFO L93 Difference]: Finished difference Result 1110 states and 1349 transitions. [2022-03-19 06:48:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:48:16,984 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-03-19 06:48:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:48:16,986 INFO L225 Difference]: With dead ends: 1110 [2022-03-19 06:48:16,986 INFO L226 Difference]: Without dead ends: 1049 [2022-03-19 06:48:16,986 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:48:16,986 INFO L912 BasicCegarLoop]: 331 mSDtfsCounter, 579 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 06:48:16,987 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 1001 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 06:48:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-03-19 06:48:17,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 997. [2022-03-19 06:48:17,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 794 states have (on average 1.2317380352644836) internal successors, (978), 814 states have internal predecessors, (978), 97 states have call successors, (97), 79 states have call predecessors, (97), 105 states have return successors, (128), 108 states have call predecessors, (128), 91 states have call successors, (128) [2022-03-19 06:48:17,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1203 transitions. [2022-03-19 06:48:17,317 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1203 transitions. Word has length 73 [2022-03-19 06:48:17,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:48:17,317 INFO L478 AbstractCegarLoop]: Abstraction has 997 states and 1203 transitions. [2022-03-19 06:48:17,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 06:48:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1203 transitions. [2022-03-19 06:48:17,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 06:48:17,320 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:48:17,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:48:17,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-03-19 06:48:17,320 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:48:17,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:48:17,320 INFO L85 PathProgramCache]: Analyzing trace with hash -644807577, now seen corresponding path program 1 times [2022-03-19 06:48:17,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:48:17,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1408573] [2022-03-19 06:48:17,321 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:48:17,321 INFO L85 PathProgramCache]: Analyzing trace with hash -644807577, now seen corresponding path program 2 times [2022-03-19 06:48:17,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:48:17,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774964491] [2022-03-19 06:48:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:48:17,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:48:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 06:48:17,337 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 06:48:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 06:48:17,406 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 06:48:17,406 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-19 06:48:17,406 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-19 06:48:17,410 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 06:48:17,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-03-19 06:48:17,413 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-03-19 06:48:17,416 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 06:48:17,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 06:48:17 BoogieIcfgContainer [2022-03-19 06:48:17,440 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 06:48:17,441 INFO L158 Benchmark]: Toolchain (without parser) took 176471.17ms. Allocated memory was 183.5MB in the beginning and 619.7MB in the end (delta: 436.2MB). Free memory was 125.6MB in the beginning and 328.8MB in the end (delta: -203.3MB). Peak memory consumption was 232.4MB. Max. memory is 8.0GB. [2022-03-19 06:48:17,441 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 183.5MB. Free memory is still 144.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 06:48:17,441 INFO L158 Benchmark]: CACSL2BoogieTranslator took 570.09ms. Allocated memory was 183.5MB in the beginning and 247.5MB in the end (delta: 64.0MB). Free memory was 125.3MB in the beginning and 200.1MB in the end (delta: -74.8MB). Peak memory consumption was 13.7MB. Max. memory is 8.0GB. [2022-03-19 06:48:17,441 INFO L158 Benchmark]: Boogie Preprocessor took 106.77ms. Allocated memory is still 247.5MB. Free memory was 200.1MB in the beginning and 194.9MB in the end (delta: 5.2MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2022-03-19 06:48:17,441 INFO L158 Benchmark]: RCFGBuilder took 1355.47ms. Allocated memory is still 247.5MB. Free memory was 194.9MB in the beginning and 128.8MB in the end (delta: 66.1MB). Peak memory consumption was 66.1MB. Max. memory is 8.0GB. [2022-03-19 06:48:17,441 INFO L158 Benchmark]: TraceAbstraction took 174432.94ms. Allocated memory was 247.5MB in the beginning and 619.7MB in the end (delta: 372.2MB). Free memory was 128.3MB in the beginning and 328.8MB in the end (delta: -200.5MB). Peak memory consumption was 172.2MB. Max. memory is 8.0GB. [2022-03-19 06:48:17,445 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 183.5MB. Free memory is still 144.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 570.09ms. Allocated memory was 183.5MB in the beginning and 247.5MB in the end (delta: 64.0MB). Free memory was 125.3MB in the beginning and 200.1MB in the end (delta: -74.8MB). Peak memory consumption was 13.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 106.77ms. Allocated memory is still 247.5MB. Free memory was 200.1MB in the beginning and 194.9MB in the end (delta: 5.2MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. * RCFGBuilder took 1355.47ms. Allocated memory is still 247.5MB. Free memory was 194.9MB in the beginning and 128.8MB in the end (delta: 66.1MB). Peak memory consumption was 66.1MB. Max. memory is 8.0GB. * TraceAbstraction took 174432.94ms. Allocated memory was 247.5MB in the beginning and 619.7MB in the end (delta: 372.2MB). Free memory was 128.3MB in the beginning and 328.8MB in the end (delta: -200.5MB). Peak memory consumption was 172.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 59]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L32] int s ; [L33] int UNLOADED ; [L34] int NP ; [L35] int DC ; [L36] int SKIP1 ; [L37] int SKIP2 ; [L38] int MPR1 ; [L39] int MPR3 ; [L40] int IPC ; [L41] int pended ; [L42] int compFptr ; [L43] int compRegistered ; [L44] int lowerDriverReturn ; [L45] int setEventCalled ; [L46] int customIrp ; [L47] int routine ; [L48] int myStatus ; [L49] int pirp ; [L50] int Executive ; [L51] int Suspended ; [L52] int KernelMode ; [L53] int DeviceUsageTypePaging ; [L1718] int pirp__IoStatus__Status ; [L1719] int d = __VERIFIER_nondet_int() ; [L1720] int status = __VERIFIER_nondet_int() ; [L1721] int irp = __VERIFIER_nondet_int() ; [L1722] int we_should_unload = __VERIFIER_nondet_int() ; [L1723] int irp_choice = __VERIFIER_nondet_int() ; [L1724] int devobj = __VERIFIER_nondet_int() ; [L1725] int __cil_tmp9 ; [L1730] s = 0 [L1731] UNLOADED = 0 [L1732] NP = 0 [L1733] DC = 0 [L1734] SKIP1 = 0 [L1735] SKIP2 = 0 [L1736] MPR1 = 0 [L1737] MPR3 = 0 [L1738] IPC = 0 [L1739] pended = 0 [L1740] compFptr = 0 [L1741] compRegistered = 0 [L1742] lowerDriverReturn = 0 [L1743] setEventCalled = 0 [L1744] customIrp = 0 [L1745] routine = 0 [L1746] myStatus = 0 [L1747] pirp = 0 [L1748] Executive = 0 [L1749] Suspended = 5 [L1750] KernelMode = 0 [L1751] DeviceUsageTypePaging = 1 [L1754] pirp = irp [L1755] CALL _BLAST_init() [L67] UNLOADED = 0 [L68] NP = 1 [L69] DC = 2 [L70] SKIP1 = 3 [L71] SKIP2 = 4 [L72] MPR1 = 5 [L73] MPR3 = 6 [L74] IPC = 7 [L75] s = UNLOADED [L76] pended = 0 [L77] compFptr = 0 [L78] compRegistered = 0 [L79] lowerDriverReturn = 0 [L80] setEventCalled = 0 [L81] customIrp = 0 [L1755] RET _BLAST_init() [L1757] COND TRUE status >= 0 [L1758] s = NP [L1759] customIrp = 0 [L1760] setEventCalled = customIrp [L1761] lowerDriverReturn = setEventCalled [L1762] compRegistered = lowerDriverReturn [L1763] compFptr = compRegistered [L1764] pended = compFptr [L1765] pirp__IoStatus__Status = 0 [L1766] myStatus = 0 [L1767] COND TRUE irp_choice == 0 [L1768] pirp__IoStatus__Status = -1073741637 [L1769] myStatus = -1073741637 [L1772] CALL stub_driver_init() [L1707] s = NP [L1708] customIrp = 0 [L1709] setEventCalled = customIrp [L1710] lowerDriverReturn = setEventCalled [L1711] compRegistered = lowerDriverReturn [L1712] compFptr = compRegistered [L1713] pended = compFptr [L1772] RET stub_driver_init() [L1775] COND FALSE !(status < 0) [L1779] int tmp_ndt_1; [L1780] tmp_ndt_1 = __VERIFIER_nondet_int() [L1781] COND TRUE tmp_ndt_1 == 2 [L1798] CALL, EXPR CdAudioDeviceControl(devobj, pirp) [L313] int deviceExtension__Active = __VERIFIER_nondet_int() ; [L314] int status ; [L317] COND FALSE !(deviceExtension__Active == 2) [L320] COND FALSE !(deviceExtension__Active == 3) [L323] COND FALSE !(deviceExtension__Active == 1) [L326] COND TRUE deviceExtension__Active == 7 [L348] CALL, EXPR CdAudioHPCdrDeviceControl(DeviceObject, Irp) [L1591] int currentIrpStack__Parameters__DeviceIoControl__IoControlCode = __VERIFIER_nondet_int() ; [L1592] int deviceExtension__TargetDeviceObject = __VERIFIER_nondet_int() ; [L1593] int irpSp__Control ; [L1594] int tmp ; [L1595] int tmp___0 ; [L1596] int __cil_tmp8 ; [L1597] int __cil_tmp9 ; [L1598] int __cil_tmp10 ; [L1599] int __cil_tmp11 ; [L1600] int __cil_tmp12 ; [L1604] __cil_tmp8 = 56 [L1605] __cil_tmp9 = 16384 [L1606] __cil_tmp10 = 131072 [L1607] __cil_tmp11 = 147456 [L1608] __cil_tmp12 = 147512 [L1609] COND TRUE currentIrpStack__Parameters__DeviceIoControl__IoControlCode == __cil_tmp12 [L1610] COND FALSE !(s != NP) [L1615] COND FALSE !(compRegistered != 0) [L1620] compRegistered = 1 [L1621] routine = 0 [L1625] irpSp__Control = 224 [L1626] CALL, EXPR IofCallDriver(deviceExtension__TargetDeviceObject, Irp) [L1900] int Irp__PendingReturned = __VERIFIER_nondet_int() ; [L1901] int returnVal2 ; [L1902] int compRetStatus ; [L1903] int lcontext = __VERIFIER_nondet_int() ; [L1904] unsigned long __cil_tmp8 ; [L1907] COND TRUE \read(compRegistered) [L1908] COND TRUE routine == 0 [L1910] CALL, EXPR HPCdrCompletion(DeviceObject, Irp, lcontext) [L1569] int Irp__PendingReturned = __VERIFIER_nondet_int() ; [L1570] int Irp__AssociatedIrp__SystemBuffer = __VERIFIER_nondet_int() ; [L1573] COND TRUE \read(Irp__PendingReturned) [L1574] COND TRUE pended == 0 [L1575] pended = 1 [L1582] COND FALSE !(myStatus >= 0) [L1587] return (myStatus); [L1910] RET, EXPR HPCdrCompletion(DeviceObject, Irp, lcontext) [L1910] compRetStatus = HPCdrCompletion(DeviceObject, Irp, lcontext) [L1920] __cil_tmp8 = (unsigned long )compRetStatus [L1921] COND FALSE !(__cil_tmp8 == -1073741802) [L1928] COND FALSE !(\read(Irp__PendingReturned)) [L1931] int tmp_ndt_4; [L1932] tmp_ndt_4 = __VERIFIER_nondet_int() [L1933] COND TRUE tmp_ndt_4 == 0 [L1944] returnVal2 = 0 [L1958] COND TRUE s == NP [L1959] s = IPC [L1960] lowerDriverReturn = returnVal2 [L1981] return (returnVal2); [L1626] RET, EXPR IofCallDriver(deviceExtension__TargetDeviceObject, Irp) [L1626] tmp = IofCallDriver(deviceExtension__TargetDeviceObject, Irp) [L1628] return (tmp); [L348] RET, EXPR CdAudioHPCdrDeviceControl(DeviceObject, Irp) [L348] status = CdAudioHPCdrDeviceControl(DeviceObject, Irp) [L363] return (status); [L1798] RET, EXPR CdAudioDeviceControl(devobj, pirp) [L1798] status = CdAudioDeviceControl(devobj, pirp) [L1819] COND FALSE !(\read(we_should_unload)) [L1825] COND TRUE pended == 1 [L1826] COND FALSE !(s == NP) [L1833] COND TRUE pended == 1 [L1834] COND FALSE !(s == MPR3) [L1841] COND TRUE s != UNLOADED [L1842] COND TRUE status != -1 [L1843] COND TRUE s != SKIP2 [L1844] COND FALSE !(s != IPC) [L1857] COND FALSE !(pended != 1) [L1869] COND TRUE status != 259 [L1871] CALL errorFn() [L59] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 31 procedures, 520 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 174.4s, OverallIterations: 70, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 141.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 76312 SdHoareTripleChecker+Valid, 107.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 75898 mSDsluCounter, 118958 SdHoareTripleChecker+Invalid, 91.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 78995 mSDsCounter, 26408 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 183625 IncrementalHoareTripleChecker+Invalid, 210033 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 26408 mSolverCounterUnsat, 39963 mSDtfsCounter, 183625 mSolverCounterSat, 0.9s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1975 GetRequests, 825 SyntacticMatches, 18 SemanticMatches, 1132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2846 ImplicationChecksByTransitivity, 18.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1099occurred in iteration=65, InterpolantAutomatonStates: 922, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 15.5s AutomataMinimizationTime, 69 MinimizatonAttempts, 8291 StatesRemovedByMinimization, 69 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-19 06:48:17,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...