/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-07 00:46:38,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-07 00:46:38,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-07 00:46:38,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-07 00:46:38,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-07 00:46:38,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-07 00:46:38,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-07 00:46:38,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-07 00:46:38,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-07 00:46:38,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-07 00:46:38,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-07 00:46:38,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-07 00:46:38,600 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-07 00:46:38,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-07 00:46:38,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-07 00:46:38,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-07 00:46:38,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-07 00:46:38,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-07 00:46:38,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-07 00:46:38,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-07 00:46:38,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-07 00:46:38,615 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-07 00:46:38,622 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-07 00:46:38,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-07 00:46:38,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-07 00:46:38,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-07 00:46:38,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-07 00:46:38,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-07 00:46:38,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-07 00:46:38,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-07 00:46:38,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-07 00:46:38,624 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-07 00:46:38,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-07 00:46:38,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-07 00:46:38,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-07 00:46:38,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-07 00:46:38,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-07 00:46:38,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:46:38,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-07 00:46:38,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-07 00:46:38,625 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-07 00:46:38,625 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-07 00:46:38,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-07 00:46:38,625 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-07 00:46:38,625 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-07 00:46:38,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-07 00:46:38,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-07 00:46:38,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-07 00:46:38,839 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-07 00:46:38,839 INFO L275 PluginConnector]: CDTParser initialized [2022-04-07 00:46:38,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c [2022-04-07 00:46:38,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a61d0314/756fe0506fce44e0b50cd4c1f5574e67/FLAG0669aaeac [2022-04-07 00:46:39,220 INFO L306 CDTParser]: Found 1 translation units. [2022-04-07 00:46:39,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c [2022-04-07 00:46:39,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a61d0314/756fe0506fce44e0b50cd4c1f5574e67/FLAG0669aaeac [2022-04-07 00:46:39,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a61d0314/756fe0506fce44e0b50cd4c1f5574e67 [2022-04-07 00:46:39,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-07 00:46:39,620 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-07 00:46:39,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-07 00:46:39,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-07 00:46:39,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-07 00:46:39,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:46:39" (1/1) ... [2022-04-07 00:46:39,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27c90d78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:46:39, skipping insertion in model container [2022-04-07 00:46:39,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:46:39" (1/1) ... [2022-04-07 00:46:39,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-07 00:46:39,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-07 00:46:40,161 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/floppy_simpl4.cil-2.c[48585,48598] [2022-04-07 00:46:40,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:46:40,188 INFO L203 MainTranslator]: Completed pre-run [2022-04-07 00:46:40,282 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/floppy_simpl4.cil-2.c[48585,48598] [2022-04-07 00:46:40,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:46:40,295 INFO L208 MainTranslator]: Completed translation [2022-04-07 00:46:40,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:46:40 WrapperNode [2022-04-07 00:46:40,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-07 00:46:40,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-07 00:46:40,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-07 00:46:40,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-07 00:46:40,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:46:40" (1/1) ... [2022-04-07 00:46:40,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:46:40" (1/1) ... [2022-04-07 00:46:40,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:46:40" (1/1) ... [2022-04-07 00:46:40,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:46:40" (1/1) ... [2022-04-07 00:46:40,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:46:40" (1/1) ... [2022-04-07 00:46:40,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:46:40" (1/1) ... [2022-04-07 00:46:40,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:46:40" (1/1) ... [2022-04-07 00:46:40,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-07 00:46:40,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-07 00:46:40,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-07 00:46:40,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-07 00:46:40,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:46:40" (1/1) ... [2022-04-07 00:46:40,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:46:40,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:46:40,425 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) [2022-04-07 00:46:40,442 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 [2022-04-07 00:46:40,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-07 00:46:40,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-07 00:46:40,459 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-07 00:46:40,459 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-04-07 00:46:40,459 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-04-07 00:46:40,460 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-04-07 00:46:40,460 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-04-07 00:46:40,460 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-04-07 00:46:40,460 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-04-07 00:46:40,460 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-04-07 00:46:40,460 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-04-07 00:46:40,460 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-04-07 00:46:40,460 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-07 00:46:40,461 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-04-07 00:46:40,461 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-04-07 00:46:40,462 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-04-07 00:46:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-04-07 00:46:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-04-07 00:46:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-04-07 00:46:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-04-07 00:46:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-04-07 00:46:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-04-07 00:46:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-04-07 00:46:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-04-07 00:46:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-04-07 00:46:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-04-07 00:46:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-04-07 00:46:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-04-07 00:46:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckFormatParameters [2022-04-07 00:46:40,464 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-04-07 00:46:40,464 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-04-07 00:46:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-07 00:46:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-07 00:46:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-07 00:46:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-07 00:46:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-04-07 00:46:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-07 00:46:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-04-07 00:46:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-04-07 00:46:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-04-07 00:46:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-04-07 00:46:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-04-07 00:46:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-04-07 00:46:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-04-07 00:46:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-04-07 00:46:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-04-07 00:46:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-04-07 00:46:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-04-07 00:46:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-04-07 00:46:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-04-07 00:46:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-04-07 00:46:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-04-07 00:46:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-04-07 00:46:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-04-07 00:46:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-04-07 00:46:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-04-07 00:46:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-04-07 00:46:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-04-07 00:46:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckFormatParameters [2022-04-07 00:46:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-04-07 00:46:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-04-07 00:46:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-04-07 00:46:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-04-07 00:46:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-04-07 00:46:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-07 00:46:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-04-07 00:46:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-07 00:46:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-07 00:46:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-07 00:46:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-07 00:46:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-07 00:46:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-07 00:46:40,669 INFO L234 CfgBuilder]: Building ICFG [2022-04-07 00:46:40,670 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-07 00:46:40,704 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:46:40,726 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:46:40,726 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:46:40,732 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:46:40,738 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:46:40,739 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:46:40,742 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:46:40,908 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-04-07 00:46:40,909 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-04-07 00:46:40,910 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:46:40,985 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !false; [2022-04-07 00:46:40,986 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume false; [2022-04-07 00:46:40,993 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:46:41,006 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-04-07 00:46:41,007 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-04-07 00:46:41,051 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:46:41,055 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:46:41,055 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:46:41,055 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:46:41,059 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:46:41,059 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:46:41,060 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:46:41,066 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:46:41,066 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:46:41,086 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:46:41,101 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-04-07 00:46:41,101 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-04-07 00:46:41,103 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:46:41,165 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-04-07 00:46:41,165 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-04-07 00:46:41,193 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:46:41,196 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:46:41,196 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:46:41,196 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:46:41,200 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:46:41,200 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:46:41,200 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:46:41,203 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:46:41,204 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:46:41,211 INFO L275 CfgBuilder]: Performing block encoding [2022-04-07 00:46:41,218 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-07 00:46:41,218 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-07 00:46:41,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:46:41 BoogieIcfgContainer [2022-04-07 00:46:41,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-07 00:46:41,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-07 00:46:41,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-07 00:46:41,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-07 00:46:41,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.04 12:46:39" (1/3) ... [2022-04-07 00:46:41,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@457c2e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:46:41, skipping insertion in model container [2022-04-07 00:46:41,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:46:40" (2/3) ... [2022-04-07 00:46:41,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@457c2e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:46:41, skipping insertion in model container [2022-04-07 00:46:41,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:46:41" (3/3) ... [2022-04-07 00:46:41,239 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl4.cil-2.c [2022-04-07 00:46:41,245 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-07 00:46:41,245 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-07 00:46:41,287 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-07 00:46:41,295 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 [2022-04-07 00:46:41,295 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-07 00:46:41,317 INFO L276 IsEmpty]: Start isEmpty. Operand has 389 states, 288 states have (on average 1.46875) internal successors, (423), 314 states have internal predecessors, (423), 71 states have call successors, (71), 28 states have call predecessors, (71), 28 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) [2022-04-07 00:46:41,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-07 00:46:41,327 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:46:41,327 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:46:41,328 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:46:41,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:46:41,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1386555085, now seen corresponding path program 1 times [2022-04-07 00:46:41,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:41,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1935831305] [2022-04-07 00:46:41,344 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:46:41,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1386555085, now seen corresponding path program 2 times [2022-04-07 00:46:41,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:46:41,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294223167] [2022-04-07 00:46:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:46:41,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:46:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:41,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:46:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:41,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:46:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:46:41,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:46:41,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294223167] [2022-04-07 00:46:41,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294223167] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:41,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:41,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:46:41,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:46:41,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1935831305] [2022-04-07 00:46:41,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1935831305] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:41,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:41,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:46:41,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967112458] [2022-04-07 00:46:41,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:46:41,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 00:46:41,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:41,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 00:46:41,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-07 00:46:41,782 INFO L87 Difference]: Start difference. First operand has 389 states, 288 states have (on average 1.46875) internal successors, (423), 314 states have internal predecessors, (423), 71 states have call successors, (71), 28 states have call predecessors, (71), 28 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-07 00:46:42,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:46:42,713 INFO L93 Difference]: Finished difference Result 666 states and 978 transitions. [2022-04-07 00:46:42,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-07 00:46:42,716 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-07 00:46:42,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:46:42,725 INFO L225 Difference]: With dead ends: 666 [2022-04-07 00:46:42,725 INFO L226 Difference]: Without dead ends: 422 [2022-04-07 00:46:42,743 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-07 00:46:42,745 INFO L913 BasicCegarLoop]: 496 mSDtfsCounter, 408 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:46:42,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 735 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:46:42,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-04-07 00:46:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 380. [2022-04-07 00:46:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 282 states have (on average 1.429078014184397) internal successors, (403), 306 states have internal predecessors, (403), 71 states have call successors, (71), 28 states have call predecessors, (71), 26 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2022-04-07 00:46:42,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 523 transitions. [2022-04-07 00:46:42,838 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 523 transitions. Word has length 20 [2022-04-07 00:46:42,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:46:42,838 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 523 transitions. [2022-04-07 00:46:42,838 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-07 00:46:42,838 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 523 transitions. [2022-04-07 00:46:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-07 00:46:42,839 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:46:42,839 INFO L499 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] [2022-04-07 00:46:42,840 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-07 00:46:42,840 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:46:42,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:46:42,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1836211626, now seen corresponding path program 1 times [2022-04-07 00:46:42,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:42,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [671085376] [2022-04-07 00:46:42,841 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:46:42,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1836211626, now seen corresponding path program 2 times [2022-04-07 00:46:42,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:46:42,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762512076] [2022-04-07 00:46:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:46:42,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:46:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:42,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:46:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:42,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:46:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:42,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:46:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:46:42,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:46:42,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762512076] [2022-04-07 00:46:42,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762512076] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:42,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:42,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:46:42,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:46:42,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [671085376] [2022-04-07 00:46:42,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [671085376] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:42,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:42,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:46:42,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535298126] [2022-04-07 00:46:42,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:46:42,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:46:42,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:42,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:46:42,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:46:42,964 INFO L87 Difference]: Start difference. First operand 380 states and 523 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:46:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:46:44,555 INFO L93 Difference]: Finished difference Result 747 states and 1022 transitions. [2022-04-07 00:46:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:46:44,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-04-07 00:46:44,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:46:44,565 INFO L225 Difference]: With dead ends: 747 [2022-04-07 00:46:44,566 INFO L226 Difference]: Without dead ends: 584 [2022-04-07 00:46:44,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:46:44,567 INFO L913 BasicCegarLoop]: 634 mSDtfsCounter, 650 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:46:44,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 914 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-07 00:46:44,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-04-07 00:46:44,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 525. [2022-04-07 00:46:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 405 states have (on average 1.3530864197530865) internal successors, (548), 410 states have internal predecessors, (548), 78 states have call successors, (78), 41 states have call predecessors, (78), 41 states have return successors, (90), 75 states have call predecessors, (90), 66 states have call successors, (90) [2022-04-07 00:46:44,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 716 transitions. [2022-04-07 00:46:44,698 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 716 transitions. Word has length 25 [2022-04-07 00:46:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:46:44,699 INFO L478 AbstractCegarLoop]: Abstraction has 525 states and 716 transitions. [2022-04-07 00:46:44,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:46:44,699 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 716 transitions. [2022-04-07 00:46:44,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-07 00:46:44,701 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:46:44,701 INFO L499 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] [2022-04-07 00:46:44,701 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-07 00:46:44,701 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:46:44,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:46:44,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1775067862, now seen corresponding path program 1 times [2022-04-07 00:46:44,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:44,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1768295149] [2022-04-07 00:46:44,705 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:46:44,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1775067862, now seen corresponding path program 2 times [2022-04-07 00:46:44,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:46:44,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129270537] [2022-04-07 00:46:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:46:44,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:46:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:44,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:46:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:44,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:46:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:44,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:46:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:44,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:46:44,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:46:44,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129270537] [2022-04-07 00:46:44,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129270537] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:44,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:44,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:46:44,887 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:46:44,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1768295149] [2022-04-07 00:46:44,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1768295149] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:44,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:44,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:46:44,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554611610] [2022-04-07 00:46:44,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:46:44,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:46:44,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:44,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:46:44,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:46:44,888 INFO L87 Difference]: Start difference. First operand 525 states and 716 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:46:46,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:46:46,372 INFO L93 Difference]: Finished difference Result 695 states and 934 transitions. [2022-04-07 00:46:46,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:46:46,372 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), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-04-07 00:46:46,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:46:46,376 INFO L225 Difference]: With dead ends: 695 [2022-04-07 00:46:46,376 INFO L226 Difference]: Without dead ends: 676 [2022-04-07 00:46:46,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:46:46,377 INFO L913 BasicCegarLoop]: 459 mSDtfsCounter, 758 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:46:46,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 604 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-07 00:46:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-04-07 00:46:46,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 583. [2022-04-07 00:46:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 450 states have (on average 1.3488888888888888) internal successors, (607), 463 states have internal predecessors, (607), 82 states have call successors, (82), 46 states have call predecessors, (82), 50 states have return successors, (101), 78 states have call predecessors, (101), 72 states have call successors, (101) [2022-04-07 00:46:46,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 790 transitions. [2022-04-07 00:46:46,419 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 790 transitions. Word has length 31 [2022-04-07 00:46:46,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:46:46,419 INFO L478 AbstractCegarLoop]: Abstraction has 583 states and 790 transitions. [2022-04-07 00:46:46,419 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), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:46:46,419 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 790 transitions. [2022-04-07 00:46:46,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-07 00:46:46,420 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:46:46,421 INFO L499 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] [2022-04-07 00:46:46,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-07 00:46:46,421 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:46:46,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:46:46,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1405496584, now seen corresponding path program 1 times [2022-04-07 00:46:46,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:46,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [851618198] [2022-04-07 00:46:46,422 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:46:46,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1405496584, now seen corresponding path program 2 times [2022-04-07 00:46:46,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:46:46,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83901727] [2022-04-07 00:46:46,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:46:46,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:46:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:46,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:46:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:46,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:46:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:46,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:46:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:46:46,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:46:46,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83901727] [2022-04-07 00:46:46,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83901727] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:46,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:46,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:46:46,544 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:46:46,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [851618198] [2022-04-07 00:46:46,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [851618198] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:46,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:46,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:46:46,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444570914] [2022-04-07 00:46:46,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:46:46,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:46:46,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:46,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:46:46,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:46:46,546 INFO L87 Difference]: Start difference. First operand 583 states and 790 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:46:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:46:47,998 INFO L93 Difference]: Finished difference Result 1117 states and 1501 transitions. [2022-04-07 00:46:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:46:47,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-04-07 00:46:47,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:46:48,003 INFO L225 Difference]: With dead ends: 1117 [2022-04-07 00:46:48,003 INFO L226 Difference]: Without dead ends: 819 [2022-04-07 00:46:48,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:46:48,004 INFO L913 BasicCegarLoop]: 541 mSDtfsCounter, 832 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:46:48,005 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 761 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-07 00:46:48,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-04-07 00:46:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 771. [2022-04-07 00:46:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 606 states have (on average 1.33993399339934) internal successors, (812), 616 states have internal predecessors, (812), 99 states have call successors, (99), 61 states have call predecessors, (99), 65 states have return successors, (136), 97 states have call predecessors, (136), 91 states have call successors, (136) [2022-04-07 00:46:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1047 transitions. [2022-04-07 00:46:48,125 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1047 transitions. Word has length 33 [2022-04-07 00:46:48,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:46:48,125 INFO L478 AbstractCegarLoop]: Abstraction has 771 states and 1047 transitions. [2022-04-07 00:46:48,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:46:48,126 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1047 transitions. [2022-04-07 00:46:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-07 00:46:48,137 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:46:48,137 INFO L499 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] [2022-04-07 00:46:48,137 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-07 00:46:48,138 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:46:48,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:46:48,138 INFO L85 PathProgramCache]: Analyzing trace with hash -883255635, now seen corresponding path program 1 times [2022-04-07 00:46:48,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:48,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1067442908] [2022-04-07 00:46:48,138 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:46:48,139 INFO L85 PathProgramCache]: Analyzing trace with hash -883255635, now seen corresponding path program 2 times [2022-04-07 00:46:48,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:46:48,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773451471] [2022-04-07 00:46:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:46:48,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:46:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:48,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:46:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:48,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:46:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:48,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:46:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:48,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:46:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:48,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:46:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:46:48,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:46:48,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773451471] [2022-04-07 00:46:48,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773451471] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:48,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:48,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:46:48,257 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:46:48,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1067442908] [2022-04-07 00:46:48,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1067442908] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:48,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:48,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:46:48,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990700626] [2022-04-07 00:46:48,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:46:48,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:46:48,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:48,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:46:48,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:46:48,263 INFO L87 Difference]: Start difference. First operand 771 states and 1047 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:46:49,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:46:49,304 INFO L93 Difference]: Finished difference Result 865 states and 1163 transitions. [2022-04-07 00:46:49,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:46:49,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 7 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 38 [2022-04-07 00:46:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:46:49,309 INFO L225 Difference]: With dead ends: 865 [2022-04-07 00:46:49,310 INFO L226 Difference]: Without dead ends: 860 [2022-04-07 00:46:49,310 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:46:49,315 INFO L913 BasicCegarLoop]: 476 mSDtfsCounter, 712 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:46:49,317 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 892 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:46:49,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-04-07 00:46:49,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 808. [2022-04-07 00:46:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 636 states have (on average 1.3333333333333333) internal successors, (848), 648 states have internal predecessors, (848), 99 states have call successors, (99), 61 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-04-07 00:46:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1090 transitions. [2022-04-07 00:46:49,409 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1090 transitions. Word has length 38 [2022-04-07 00:46:49,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:46:49,409 INFO L478 AbstractCegarLoop]: Abstraction has 808 states and 1090 transitions. [2022-04-07 00:46:49,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:46:49,409 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1090 transitions. [2022-04-07 00:46:49,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-07 00:46:49,410 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:46:49,410 INFO L499 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] [2022-04-07 00:46:49,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-07 00:46:49,411 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:46:49,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:46:49,411 INFO L85 PathProgramCache]: Analyzing trace with hash 726893149, now seen corresponding path program 1 times [2022-04-07 00:46:49,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:49,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1265495936] [2022-04-07 00:46:49,411 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:46:49,412 INFO L85 PathProgramCache]: Analyzing trace with hash 726893149, now seen corresponding path program 2 times [2022-04-07 00:46:49,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:46:49,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266083295] [2022-04-07 00:46:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:46:49,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:46:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:49,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:46:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:49,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:46:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:49,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:46:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:46:49,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:46:49,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266083295] [2022-04-07 00:46:49,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266083295] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:49,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:49,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:46:49,533 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:46:49,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1265495936] [2022-04-07 00:46:49,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1265495936] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:49,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:49,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:46:49,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318349838] [2022-04-07 00:46:49,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:46:49,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:46:49,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:49,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:46:49,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:46:49,534 INFO L87 Difference]: Start difference. First operand 808 states and 1090 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, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:46:50,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:46:50,396 INFO L93 Difference]: Finished difference Result 842 states and 1132 transitions. [2022-04-07 00:46:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:46:50,397 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, (7), 6 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 38 [2022-04-07 00:46:50,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:46:50,400 INFO L225 Difference]: With dead ends: 842 [2022-04-07 00:46:50,400 INFO L226 Difference]: Without dead ends: 839 [2022-04-07 00:46:50,401 INFO L912 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 [2022-04-07 00:46:50,403 INFO L913 BasicCegarLoop]: 467 mSDtfsCounter, 320 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:46:50,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 720 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-07 00:46:50,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-04-07 00:46:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 819. [2022-04-07 00:46:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 647 states have (on average 1.3323029366306027) internal successors, (862), 658 states have internal predecessors, (862), 99 states have call successors, (99), 62 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-04-07 00:46:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1104 transitions. [2022-04-07 00:46:50,471 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1104 transitions. Word has length 38 [2022-04-07 00:46:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:46:50,471 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1104 transitions. [2022-04-07 00:46:50,471 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, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:46:50,472 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1104 transitions. [2022-04-07 00:46:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-07 00:46:50,473 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:46:50,473 INFO L499 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] [2022-04-07 00:46:50,474 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-07 00:46:50,474 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:46:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:46:50,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2055229827, now seen corresponding path program 1 times [2022-04-07 00:46:50,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:50,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1107329520] [2022-04-07 00:46:50,475 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:46:50,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2055229827, now seen corresponding path program 2 times [2022-04-07 00:46:50,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:46:50,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708629937] [2022-04-07 00:46:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:46:50,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:46:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:50,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:46:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:50,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:46:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:50,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:46:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:50,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-07 00:46:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:50,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:46:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:46:50,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:46:50,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708629937] [2022-04-07 00:46:50,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708629937] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:50,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:50,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:46:50,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:46:50,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1107329520] [2022-04-07 00:46:50,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1107329520] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:50,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:50,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:46:50,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040885997] [2022-04-07 00:46:50,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:46:50,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:46:50,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:50,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:46:50,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:46:50,737 INFO L87 Difference]: Start difference. First operand 819 states and 1104 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:46:52,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:46:52,509 INFO L93 Difference]: Finished difference Result 877 states and 1176 transitions. [2022-04-07 00:46:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:46:52,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-04-07 00:46:52,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:46:52,513 INFO L225 Difference]: With dead ends: 877 [2022-04-07 00:46:52,513 INFO L226 Difference]: Without dead ends: 871 [2022-04-07 00:46:52,514 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:46:52,515 INFO L913 BasicCegarLoop]: 455 mSDtfsCounter, 1023 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:46:52,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 1188 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-07 00:46:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-04-07 00:46:52,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 819. [2022-04-07 00:46:52,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 647 states have (on average 1.330757341576507) internal successors, (861), 658 states have internal predecessors, (861), 99 states have call successors, (99), 62 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-04-07 00:46:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1103 transitions. [2022-04-07 00:46:52,587 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1103 transitions. Word has length 40 [2022-04-07 00:46:52,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:46:52,587 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1103 transitions. [2022-04-07 00:46:52,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:46:52,588 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1103 transitions. [2022-04-07 00:46:52,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-07 00:46:52,589 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:46:52,590 INFO L499 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] [2022-04-07 00:46:52,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-07 00:46:52,590 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:46:52,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:46:52,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1573005165, now seen corresponding path program 1 times [2022-04-07 00:46:52,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:52,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1304509675] [2022-04-07 00:46:52,591 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:46:52,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1573005165, now seen corresponding path program 2 times [2022-04-07 00:46:52,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:46:52,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218747288] [2022-04-07 00:46:52,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:46:52,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:46:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:52,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:46:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:52,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:46:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:52,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:46:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:52,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-07 00:46:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:52,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:46:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:46:52,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:46:52,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218747288] [2022-04-07 00:46:52,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218747288] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:52,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:52,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:46:52,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:46:52,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1304509675] [2022-04-07 00:46:52,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1304509675] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:52,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:52,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:46:52,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755104587] [2022-04-07 00:46:52,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:46:52,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:46:52,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:52,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:46:52,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:46:52,788 INFO L87 Difference]: Start difference. First operand 819 states and 1103 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:46:54,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:46:54,118 INFO L93 Difference]: Finished difference Result 877 states and 1175 transitions. [2022-04-07 00:46:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:46:54,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-04-07 00:46:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:46:54,122 INFO L225 Difference]: With dead ends: 877 [2022-04-07 00:46:54,122 INFO L226 Difference]: Without dead ends: 871 [2022-04-07 00:46:54,123 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:46:54,123 INFO L913 BasicCegarLoop]: 456 mSDtfsCounter, 1279 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:46:54,123 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1294 Valid, 928 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:46:54,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-04-07 00:46:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 819. [2022-04-07 00:46:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 647 states have (on average 1.3292117465224111) internal successors, (860), 658 states have internal predecessors, (860), 99 states have call successors, (99), 62 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-04-07 00:46:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1102 transitions. [2022-04-07 00:46:54,200 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1102 transitions. Word has length 41 [2022-04-07 00:46:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:46:54,201 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1102 transitions. [2022-04-07 00:46:54,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:46:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1102 transitions. [2022-04-07 00:46:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-07 00:46:54,202 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:46:54,202 INFO L499 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] [2022-04-07 00:46:54,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-07 00:46:54,203 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:46:54,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:46:54,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1434972884, now seen corresponding path program 1 times [2022-04-07 00:46:54,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:54,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [651047304] [2022-04-07 00:46:54,203 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:46:54,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1434972884, now seen corresponding path program 2 times [2022-04-07 00:46:54,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:46:54,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792568440] [2022-04-07 00:46:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:46:54,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:46:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:54,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:46:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:54,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:46:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:54,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:46:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:54,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-07 00:46:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:54,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:46:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:46:54,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:46:54,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792568440] [2022-04-07 00:46:54,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792568440] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:54,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:54,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:46:54,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:46:54,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [651047304] [2022-04-07 00:46:54,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [651047304] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:54,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:54,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:46:54,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077061606] [2022-04-07 00:46:54,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:46:54,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:46:54,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:54,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:46:54,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:46:54,350 INFO L87 Difference]: Start difference. First operand 819 states and 1102 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:46:55,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:46:55,450 INFO L93 Difference]: Finished difference Result 882 states and 1180 transitions. [2022-04-07 00:46:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:46:55,450 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 7 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 42 [2022-04-07 00:46:55,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:46:55,454 INFO L225 Difference]: With dead ends: 882 [2022-04-07 00:46:55,455 INFO L226 Difference]: Without dead ends: 867 [2022-04-07 00:46:55,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:46:55,457 INFO L913 BasicCegarLoop]: 488 mSDtfsCounter, 539 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:46:55,457 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 1449 Invalid, 1734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:46:55,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-04-07 00:46:55,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 817. [2022-04-07 00:46:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 646 states have (on average 1.328173374613003) internal successors, (858), 657 states have internal predecessors, (858), 98 states have call successors, (98), 62 states have call predecessors, (98), 72 states have return successors, (142), 99 states have call predecessors, (142), 90 states have call successors, (142) [2022-04-07 00:46:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1098 transitions. [2022-04-07 00:46:55,579 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1098 transitions. Word has length 42 [2022-04-07 00:46:55,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:46:55,579 INFO L478 AbstractCegarLoop]: Abstraction has 817 states and 1098 transitions. [2022-04-07 00:46:55,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:46:55,579 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1098 transitions. [2022-04-07 00:46:55,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-07 00:46:55,580 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:46:55,580 INFO L499 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] [2022-04-07 00:46:55,580 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-07 00:46:55,581 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:46:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:46:55,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1612959141, now seen corresponding path program 1 times [2022-04-07 00:46:55,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:55,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1551039877] [2022-04-07 00:46:55,583 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:46:55,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1612959141, now seen corresponding path program 2 times [2022-04-07 00:46:55,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:46:55,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153511389] [2022-04-07 00:46:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:46:55,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:46:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:55,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:46:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:55,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:46:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:55,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:46:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:55,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:46:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:55,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:46:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:46:55,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:46:55,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153511389] [2022-04-07 00:46:55,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153511389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:55,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:55,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:46:55,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:46:55,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1551039877] [2022-04-07 00:46:55,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1551039877] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:55,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:55,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:46:55,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517356601] [2022-04-07 00:46:55,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:46:55,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:46:55,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:55,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:46:55,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:46:55,749 INFO L87 Difference]: Start difference. First operand 817 states and 1098 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:46:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:46:56,859 INFO L93 Difference]: Finished difference Result 880 states and 1176 transitions. [2022-04-07 00:46:56,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:46:56,859 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (7), 7 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 41 [2022-04-07 00:46:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:46:56,862 INFO L225 Difference]: With dead ends: 880 [2022-04-07 00:46:56,862 INFO L226 Difference]: Without dead ends: 860 [2022-04-07 00:46:56,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:46:56,863 INFO L913 BasicCegarLoop]: 475 mSDtfsCounter, 734 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:46:56,863 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 1282 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:46:56,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-04-07 00:46:56,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 810. [2022-04-07 00:46:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 642 states have (on average 1.3286604361370717) internal successors, (853), 653 states have internal predecessors, (853), 96 states have call successors, (96), 61 states have call predecessors, (96), 71 states have return successors, (140), 97 states have call predecessors, (140), 88 states have call successors, (140) [2022-04-07 00:46:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1089 transitions. [2022-04-07 00:46:56,969 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1089 transitions. Word has length 41 [2022-04-07 00:46:56,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:46:56,969 INFO L478 AbstractCegarLoop]: Abstraction has 810 states and 1089 transitions. [2022-04-07 00:46:56,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:46:56,970 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1089 transitions. [2022-04-07 00:46:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-07 00:46:56,970 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:46:56,970 INFO L499 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] [2022-04-07 00:46:56,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-07 00:46:56,971 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:46:56,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:46:56,971 INFO L85 PathProgramCache]: Analyzing trace with hash 2069240196, now seen corresponding path program 1 times [2022-04-07 00:46:56,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:56,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1972688039] [2022-04-07 00:46:56,972 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:46:56,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2069240196, now seen corresponding path program 2 times [2022-04-07 00:46:56,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:46:56,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444801203] [2022-04-07 00:46:56,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:46:56,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:46:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:57,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:46:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:57,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:46:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:57,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:46:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:57,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:46:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:46:57,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:46:57,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444801203] [2022-04-07 00:46:57,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444801203] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:57,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:57,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:46:57,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:46:57,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1972688039] [2022-04-07 00:46:57,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1972688039] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:57,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:57,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:46:57,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517667267] [2022-04-07 00:46:57,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:46:57,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:46:57,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:57,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:46:57,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:46:57,153 INFO L87 Difference]: Start difference. First operand 810 states and 1089 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:46:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:46:58,407 INFO L93 Difference]: Finished difference Result 857 states and 1144 transitions. [2022-04-07 00:46:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:46:58,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2022-04-07 00:46:58,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:46:58,427 INFO L225 Difference]: With dead ends: 857 [2022-04-07 00:46:58,427 INFO L226 Difference]: Without dead ends: 835 [2022-04-07 00:46:58,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:46:58,428 INFO L913 BasicCegarLoop]: 456 mSDtfsCounter, 235 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1608 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:46:58,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 1014 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1608 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-07 00:46:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-04-07 00:46:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 812. [2022-04-07 00:46:58,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 644 states have (on average 1.3276397515527951) internal successors, (855), 655 states have internal predecessors, (855), 96 states have call successors, (96), 61 states have call predecessors, (96), 71 states have return successors, (140), 97 states have call predecessors, (140), 88 states have call successors, (140) [2022-04-07 00:46:58,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1091 transitions. [2022-04-07 00:46:58,499 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1091 transitions. Word has length 42 [2022-04-07 00:46:58,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:46:58,499 INFO L478 AbstractCegarLoop]: Abstraction has 812 states and 1091 transitions. [2022-04-07 00:46:58,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:46:58,499 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1091 transitions. [2022-04-07 00:46:58,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-07 00:46:58,500 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:46:58,500 INFO L499 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] [2022-04-07 00:46:58,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-07 00:46:58,500 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:46:58,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:46:58,502 INFO L85 PathProgramCache]: Analyzing trace with hash -289846458, now seen corresponding path program 1 times [2022-04-07 00:46:58,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:58,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [141113511] [2022-04-07 00:46:58,502 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:46:58,502 INFO L85 PathProgramCache]: Analyzing trace with hash -289846458, now seen corresponding path program 2 times [2022-04-07 00:46:58,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:46:58,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939928178] [2022-04-07 00:46:58,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:46:58,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:46:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:58,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:46:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:58,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:46:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:58,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:46:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:58,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-07 00:46:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:46:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:46:58,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:46:58,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939928178] [2022-04-07 00:46:58,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939928178] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:58,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:58,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:46:58,630 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:46:58,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [141113511] [2022-04-07 00:46:58,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [141113511] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:46:58,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:46:58,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:46:58,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187579291] [2022-04-07 00:46:58,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:46:58,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-07 00:46:58,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:46:58,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-07 00:46:58,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:46:58,631 INFO L87 Difference]: Start difference. First operand 812 states and 1091 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:46:59,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:46:59,876 INFO L93 Difference]: Finished difference Result 908 states and 1209 transitions. [2022-04-07 00:46:59,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:46:59,877 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-04-07 00:46:59,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:46:59,880 INFO L225 Difference]: With dead ends: 908 [2022-04-07 00:46:59,880 INFO L226 Difference]: Without dead ends: 840 [2022-04-07 00:46:59,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:46:59,881 INFO L913 BasicCegarLoop]: 432 mSDtfsCounter, 616 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:46:59,881 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 931 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-07 00:46:59,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-04-07 00:47:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 816. [2022-04-07 00:47:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 647 states have (on average 1.3261205564142196) internal successors, (858), 658 states have internal predecessors, (858), 96 states have call successors, (96), 61 states have call predecessors, (96), 72 states have return successors, (142), 98 states have call predecessors, (142), 88 states have call successors, (142) [2022-04-07 00:47:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1096 transitions. [2022-04-07 00:47:00,023 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1096 transitions. Word has length 44 [2022-04-07 00:47:00,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:00,023 INFO L478 AbstractCegarLoop]: Abstraction has 816 states and 1096 transitions. [2022-04-07 00:47:00,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:47:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1096 transitions. [2022-04-07 00:47:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-07 00:47:00,025 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:00,025 INFO L499 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] [2022-04-07 00:47:00,025 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-07 00:47:00,025 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:00,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:00,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1666051445, now seen corresponding path program 1 times [2022-04-07 00:47:00,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:00,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1804949188] [2022-04-07 00:47:00,026 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:00,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1666051445, now seen corresponding path program 2 times [2022-04-07 00:47:00,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:00,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144974760] [2022-04-07 00:47:00,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:00,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:00,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:00,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:00,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:00,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:00,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:00,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144974760] [2022-04-07 00:47:00,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144974760] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:00,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:00,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:47:00,164 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:00,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1804949188] [2022-04-07 00:47:00,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1804949188] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:00,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:00,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:47:00,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665865474] [2022-04-07 00:47:00,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:00,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:47:00,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:00,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:47:00,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:47:00,166 INFO L87 Difference]: Start difference. First operand 816 states and 1096 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:47:01,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:01,326 INFO L93 Difference]: Finished difference Result 860 states and 1147 transitions. [2022-04-07 00:47:01,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:47:01,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-04-07 00:47:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:01,329 INFO L225 Difference]: With dead ends: 860 [2022-04-07 00:47:01,329 INFO L226 Difference]: Without dead ends: 838 [2022-04-07 00:47:01,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:47:01,330 INFO L913 BasicCegarLoop]: 461 mSDtfsCounter, 293 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:01,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1010 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:47:01,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-04-07 00:47:01,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 816. [2022-04-07 00:47:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 647 states have (on average 1.3261205564142196) internal successors, (858), 658 states have internal predecessors, (858), 96 states have call successors, (96), 61 states have call predecessors, (96), 72 states have return successors, (142), 98 states have call predecessors, (142), 88 states have call successors, (142) [2022-04-07 00:47:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1096 transitions. [2022-04-07 00:47:01,402 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1096 transitions. Word has length 43 [2022-04-07 00:47:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:01,403 INFO L478 AbstractCegarLoop]: Abstraction has 816 states and 1096 transitions. [2022-04-07 00:47:01,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:47:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1096 transitions. [2022-04-07 00:47:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-07 00:47:01,404 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:01,404 INFO L499 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] [2022-04-07 00:47:01,404 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-07 00:47:01,404 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:01,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:01,404 INFO L85 PathProgramCache]: Analyzing trace with hash -233101078, now seen corresponding path program 1 times [2022-04-07 00:47:01,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:01,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1449101286] [2022-04-07 00:47:01,405 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:01,405 INFO L85 PathProgramCache]: Analyzing trace with hash -233101078, now seen corresponding path program 2 times [2022-04-07 00:47:01,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:01,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206180234] [2022-04-07 00:47:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:01,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:01,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:01,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:01,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:01,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:01,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:47:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:01,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:01,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206180234] [2022-04-07 00:47:01,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206180234] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:01,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:01,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:47:01,581 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:01,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1449101286] [2022-04-07 00:47:01,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1449101286] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:01,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:01,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:47:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032617503] [2022-04-07 00:47:01,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:01,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:47:01,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:01,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:47:01,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:47:01,583 INFO L87 Difference]: Start difference. First operand 816 states and 1096 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:02,509 INFO L93 Difference]: Finished difference Result 861 states and 1149 transitions. [2022-04-07 00:47:02,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:47:02,509 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 7 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 45 [2022-04-07 00:47:02,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:02,519 INFO L225 Difference]: With dead ends: 861 [2022-04-07 00:47:02,519 INFO L226 Difference]: Without dead ends: 843 [2022-04-07 00:47:02,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:47:02,521 INFO L913 BasicCegarLoop]: 457 mSDtfsCounter, 632 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:02,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 1325 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:47:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-04-07 00:47:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 814. [2022-04-07 00:47:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 646 states have (on average 1.325077399380805) internal successors, (856), 657 states have internal predecessors, (856), 95 states have call successors, (95), 61 states have call predecessors, (95), 72 states have return successors, (141), 97 states have call predecessors, (141), 87 states have call successors, (141) [2022-04-07 00:47:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1092 transitions. [2022-04-07 00:47:02,626 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1092 transitions. Word has length 45 [2022-04-07 00:47:02,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:02,627 INFO L478 AbstractCegarLoop]: Abstraction has 814 states and 1092 transitions. [2022-04-07 00:47:02,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1092 transitions. [2022-04-07 00:47:02,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-07 00:47:02,629 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:02,629 INFO L499 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] [2022-04-07 00:47:02,629 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-07 00:47:02,629 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:02,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:02,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1086119000, now seen corresponding path program 1 times [2022-04-07 00:47:02,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:02,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1151494738] [2022-04-07 00:47:02,630 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:02,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1086119000, now seen corresponding path program 2 times [2022-04-07 00:47:02,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:02,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914527093] [2022-04-07 00:47:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:02,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:02,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:02,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:02,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:02,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:02,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:47:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:02,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:02,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914527093] [2022-04-07 00:47:02,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914527093] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:02,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:02,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:47:02,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:02,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1151494738] [2022-04-07 00:47:02,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1151494738] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:02,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:02,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:47:02,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763102324] [2022-04-07 00:47:02,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:02,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:47:02,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:02,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:47:02,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:47:02,780 INFO L87 Difference]: Start difference. First operand 814 states and 1092 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:03,740 INFO L93 Difference]: Finished difference Result 880 states and 1173 transitions. [2022-04-07 00:47:03,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:47:03,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 7 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 46 [2022-04-07 00:47:03,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:03,744 INFO L225 Difference]: With dead ends: 880 [2022-04-07 00:47:03,744 INFO L226 Difference]: Without dead ends: 804 [2022-04-07 00:47:03,746 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:47:03,747 INFO L913 BasicCegarLoop]: 486 mSDtfsCounter, 336 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:03,747 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 900 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:47:03,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-04-07 00:47:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 775. [2022-04-07 00:47:03,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 616 states have (on average 1.3246753246753247) internal successors, (816), 628 states have internal predecessors, (816), 93 states have call successors, (93), 60 states have call predecessors, (93), 65 states have return successors, (132), 88 states have call predecessors, (132), 85 states have call successors, (132) [2022-04-07 00:47:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1041 transitions. [2022-04-07 00:47:03,840 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1041 transitions. Word has length 46 [2022-04-07 00:47:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:03,840 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1041 transitions. [2022-04-07 00:47:03,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1041 transitions. [2022-04-07 00:47:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-07 00:47:03,841 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:03,841 INFO L499 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] [2022-04-07 00:47:03,841 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-07 00:47:03,841 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:03,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:03,841 INFO L85 PathProgramCache]: Analyzing trace with hash 380283320, now seen corresponding path program 1 times [2022-04-07 00:47:03,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:03,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1177740581] [2022-04-07 00:47:03,842 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:03,842 INFO L85 PathProgramCache]: Analyzing trace with hash 380283320, now seen corresponding path program 2 times [2022-04-07 00:47:03,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:03,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391508064] [2022-04-07 00:47:03,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:03,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:03,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:03,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:03,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:03,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-07 00:47:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:03,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:03,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391508064] [2022-04-07 00:47:03,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391508064] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:03,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:03,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:47:03,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:03,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1177740581] [2022-04-07 00:47:03,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1177740581] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:03,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:03,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:47:03,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960261535] [2022-04-07 00:47:03,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:03,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-07 00:47:03,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:03,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-07 00:47:03,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-07 00:47:03,936 INFO L87 Difference]: Start difference. First operand 775 states and 1041 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:47:05,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:05,127 INFO L93 Difference]: Finished difference Result 1134 states and 1535 transitions. [2022-04-07 00:47:05,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:47:05,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2022-04-07 00:47:05,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:05,131 INFO L225 Difference]: With dead ends: 1134 [2022-04-07 00:47:05,131 INFO L226 Difference]: Without dead ends: 1131 [2022-04-07 00:47:05,131 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:47:05,133 INFO L913 BasicCegarLoop]: 533 mSDtfsCounter, 429 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:05,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 784 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-07 00:47:05,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-04-07 00:47:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 888. [2022-04-07 00:47:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 707 states have (on average 1.3295615275813295) internal successors, (940), 721 states have internal predecessors, (940), 103 states have call successors, (103), 70 states have call predecessors, (103), 77 states have return successors, (152), 98 states have call predecessors, (152), 95 states have call successors, (152) [2022-04-07 00:47:05,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1195 transitions. [2022-04-07 00:47:05,240 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1195 transitions. Word has length 47 [2022-04-07 00:47:05,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:05,240 INFO L478 AbstractCegarLoop]: Abstraction has 888 states and 1195 transitions. [2022-04-07 00:47:05,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:47:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1195 transitions. [2022-04-07 00:47:05,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-07 00:47:05,241 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:05,241 INFO L499 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] [2022-04-07 00:47:05,241 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-04-07 00:47:05,241 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:05,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:05,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1845769478, now seen corresponding path program 1 times [2022-04-07 00:47:05,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:05,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1003987651] [2022-04-07 00:47:05,242 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:05,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1845769478, now seen corresponding path program 2 times [2022-04-07 00:47:05,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:05,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501490202] [2022-04-07 00:47:05,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:05,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:05,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:05,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:05,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:05,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:47:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:05,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:47:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:05,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:05,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501490202] [2022-04-07 00:47:05,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501490202] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:05,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:05,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:47:05,395 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:05,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1003987651] [2022-04-07 00:47:05,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1003987651] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:05,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:05,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:47:05,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501867342] [2022-04-07 00:47:05,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:05,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:47:05,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:05,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:47:05,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:47:05,397 INFO L87 Difference]: Start difference. First operand 888 states and 1195 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:06,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:06,396 INFO L93 Difference]: Finished difference Result 933 states and 1248 transitions. [2022-04-07 00:47:06,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:47:06,396 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 7 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 47 [2022-04-07 00:47:06,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:06,399 INFO L225 Difference]: With dead ends: 933 [2022-04-07 00:47:06,399 INFO L226 Difference]: Without dead ends: 915 [2022-04-07 00:47:06,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:47:06,400 INFO L913 BasicCegarLoop]: 448 mSDtfsCounter, 404 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:06,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 1280 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:47:06,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-04-07 00:47:06,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 886. [2022-04-07 00:47:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 706 states have (on average 1.3286118980169972) internal successors, (938), 720 states have internal predecessors, (938), 102 states have call successors, (102), 70 states have call predecessors, (102), 77 states have return successors, (151), 97 states have call predecessors, (151), 94 states have call successors, (151) [2022-04-07 00:47:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1191 transitions. [2022-04-07 00:47:06,627 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1191 transitions. Word has length 47 [2022-04-07 00:47:06,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:06,627 INFO L478 AbstractCegarLoop]: Abstraction has 886 states and 1191 transitions. [2022-04-07 00:47:06,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:06,627 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1191 transitions. [2022-04-07 00:47:06,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-07 00:47:06,628 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:06,628 INFO L499 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] [2022-04-07 00:47:06,628 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-04-07 00:47:06,629 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:06,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1334176634, now seen corresponding path program 1 times [2022-04-07 00:47:06,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:06,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1808628010] [2022-04-07 00:47:06,629 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:06,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1334176634, now seen corresponding path program 2 times [2022-04-07 00:47:06,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:06,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322653563] [2022-04-07 00:47:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:06,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:06,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:06,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:06,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:06,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-07 00:47:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:06,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:06,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322653563] [2022-04-07 00:47:06,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322653563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:06,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:06,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:47:06,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:06,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1808628010] [2022-04-07 00:47:06,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1808628010] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:06,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:06,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:47:06,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578725556] [2022-04-07 00:47:06,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:06,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:47:06,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:06,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:47:06,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:47:06,880 INFO L87 Difference]: Start difference. First operand 886 states and 1191 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-07 00:47:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:08,401 INFO L93 Difference]: Finished difference Result 1483 states and 1950 transitions. [2022-04-07 00:47:08,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:47:08,408 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-04-07 00:47:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:08,413 INFO L225 Difference]: With dead ends: 1483 [2022-04-07 00:47:08,413 INFO L226 Difference]: Without dead ends: 936 [2022-04-07 00:47:08,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-04-07 00:47:08,418 INFO L913 BasicCegarLoop]: 558 mSDtfsCounter, 1791 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1803 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:08,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1803 Valid, 859 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:47:08,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-04-07 00:47:08,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 877. [2022-04-07 00:47:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 697 states have (on average 1.3156384505021521) internal successors, (917), 711 states have internal predecessors, (917), 102 states have call successors, (102), 70 states have call predecessors, (102), 77 states have return successors, (151), 97 states have call predecessors, (151), 94 states have call successors, (151) [2022-04-07 00:47:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1170 transitions. [2022-04-07 00:47:08,532 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1170 transitions. Word has length 48 [2022-04-07 00:47:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:08,532 INFO L478 AbstractCegarLoop]: Abstraction has 877 states and 1170 transitions. [2022-04-07 00:47:08,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-07 00:47:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1170 transitions. [2022-04-07 00:47:08,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-07 00:47:08,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:08,535 INFO L499 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] [2022-04-07 00:47:08,535 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-04-07 00:47:08,535 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:08,535 INFO L85 PathProgramCache]: Analyzing trace with hash -934618588, now seen corresponding path program 1 times [2022-04-07 00:47:08,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:08,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1258121089] [2022-04-07 00:47:08,536 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:08,536 INFO L85 PathProgramCache]: Analyzing trace with hash -934618588, now seen corresponding path program 2 times [2022-04-07 00:47:08,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:08,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843569043] [2022-04-07 00:47:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:08,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:08,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:08,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:08,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:08,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:08,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:08,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:08,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843569043] [2022-04-07 00:47:08,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843569043] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:08,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:08,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:47:08,762 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:08,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1258121089] [2022-04-07 00:47:08,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1258121089] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:08,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:08,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:47:08,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383131705] [2022-04-07 00:47:08,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:08,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:47:08,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:08,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:47:08,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:47:08,763 INFO L87 Difference]: Start difference. First operand 877 states and 1170 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:47:10,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:10,706 INFO L93 Difference]: Finished difference Result 1151 states and 1528 transitions. [2022-04-07 00:47:10,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-07 00:47:10,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 7 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 [2022-04-07 00:47:10,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:10,711 INFO L225 Difference]: With dead ends: 1151 [2022-04-07 00:47:10,711 INFO L226 Difference]: Without dead ends: 1075 [2022-04-07 00:47:10,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-04-07 00:47:10,712 INFO L913 BasicCegarLoop]: 545 mSDtfsCounter, 1331 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:10,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1334 Valid, 1405 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-07 00:47:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-04-07 00:47:10,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 932. [2022-04-07 00:47:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 741 states have (on average 1.3090418353576248) internal successors, (970), 757 states have internal predecessors, (970), 105 states have call successors, (105), 71 states have call predecessors, (105), 85 states have return successors, (168), 104 states have call predecessors, (168), 97 states have call successors, (168) [2022-04-07 00:47:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1243 transitions. [2022-04-07 00:47:10,835 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1243 transitions. Word has length 50 [2022-04-07 00:47:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:10,835 INFO L478 AbstractCegarLoop]: Abstraction has 932 states and 1243 transitions. [2022-04-07 00:47:10,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:47:10,835 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1243 transitions. [2022-04-07 00:47:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-07 00:47:10,839 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:10,839 INFO L499 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] [2022-04-07 00:47:10,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-07 00:47:10,839 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:10,839 INFO L85 PathProgramCache]: Analyzing trace with hash -550624226, now seen corresponding path program 1 times [2022-04-07 00:47:10,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:10,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1948842523] [2022-04-07 00:47:10,840 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:10,840 INFO L85 PathProgramCache]: Analyzing trace with hash -550624226, now seen corresponding path program 2 times [2022-04-07 00:47:10,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:10,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373806453] [2022-04-07 00:47:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:10,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:10,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:10,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:10,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:10,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:10,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-07 00:47:10,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:11,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:11,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373806453] [2022-04-07 00:47:11,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373806453] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:11,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:11,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:47:11,000 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:11,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1948842523] [2022-04-07 00:47:11,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1948842523] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:11,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:11,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:47:11,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433179091] [2022-04-07 00:47:11,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:11,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-07 00:47:11,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:11,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-07 00:47:11,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-07 00:47:11,002 INFO L87 Difference]: Start difference. First operand 932 states and 1243 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:47:12,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:12,320 INFO L93 Difference]: Finished difference Result 979 states and 1296 transitions. [2022-04-07 00:47:12,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:47:12,320 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-04-07 00:47:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:12,328 INFO L225 Difference]: With dead ends: 979 [2022-04-07 00:47:12,328 INFO L226 Difference]: Without dead ends: 959 [2022-04-07 00:47:12,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:47:12,330 INFO L913 BasicCegarLoop]: 442 mSDtfsCounter, 779 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:12,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1354 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:47:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-04-07 00:47:12,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 932. [2022-04-07 00:47:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 741 states have (on average 1.2928475033738192) internal successors, (958), 757 states have internal predecessors, (958), 105 states have call successors, (105), 71 states have call predecessors, (105), 85 states have return successors, (168), 104 states have call predecessors, (168), 97 states have call successors, (168) [2022-04-07 00:47:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1231 transitions. [2022-04-07 00:47:12,505 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1231 transitions. Word has length 50 [2022-04-07 00:47:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:12,505 INFO L478 AbstractCegarLoop]: Abstraction has 932 states and 1231 transitions. [2022-04-07 00:47:12,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:47:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1231 transitions. [2022-04-07 00:47:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-07 00:47:12,506 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:12,506 INFO L499 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] [2022-04-07 00:47:12,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-07 00:47:12,506 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:12,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:12,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1358171884, now seen corresponding path program 1 times [2022-04-07 00:47:12,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:12,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1609818608] [2022-04-07 00:47:12,507 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:12,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1358171884, now seen corresponding path program 2 times [2022-04-07 00:47:12,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:12,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648737292] [2022-04-07 00:47:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:12,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:12,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:12,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:12,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:12,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-07 00:47:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:12,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:12,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648737292] [2022-04-07 00:47:12,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648737292] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:12,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:12,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:47:12,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:12,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1609818608] [2022-04-07 00:47:12,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1609818608] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:12,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:12,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:47:12,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190761056] [2022-04-07 00:47:12,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:12,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:47:12,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:12,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:47:12,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:47:12,658 INFO L87 Difference]: Start difference. First operand 932 states and 1231 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-07 00:47:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:13,812 INFO L93 Difference]: Finished difference Result 1041 states and 1345 transitions. [2022-04-07 00:47:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:47:13,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-04-07 00:47:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:13,815 INFO L225 Difference]: With dead ends: 1041 [2022-04-07 00:47:13,815 INFO L226 Difference]: Without dead ends: 685 [2022-04-07 00:47:13,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:47:13,816 INFO L913 BasicCegarLoop]: 470 mSDtfsCounter, 692 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:13,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 831 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:47:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-04-07 00:47:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 623. [2022-04-07 00:47:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 498 states have (on average 1.2751004016064258) internal successors, (635), 509 states have internal predecessors, (635), 71 states have call successors, (71), 46 states have call predecessors, (71), 53 states have return successors, (85), 68 states have call predecessors, (85), 63 states have call successors, (85) [2022-04-07 00:47:13,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 791 transitions. [2022-04-07 00:47:13,988 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 791 transitions. Word has length 52 [2022-04-07 00:47:13,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:13,989 INFO L478 AbstractCegarLoop]: Abstraction has 623 states and 791 transitions. [2022-04-07 00:47:13,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-07 00:47:13,989 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 791 transitions. [2022-04-07 00:47:13,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-07 00:47:13,991 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:13,991 INFO L499 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] [2022-04-07 00:47:13,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-04-07 00:47:13,992 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:13,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1083541932, now seen corresponding path program 1 times [2022-04-07 00:47:13,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:13,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2106852236] [2022-04-07 00:47:13,992 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:13,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1083541932, now seen corresponding path program 2 times [2022-04-07 00:47:13,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:13,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348182299] [2022-04-07 00:47:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:13,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:14,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:14,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:14,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:14,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:14,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:47:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:14,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:14,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348182299] [2022-04-07 00:47:14,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348182299] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:14,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:14,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:47:14,164 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:14,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2106852236] [2022-04-07 00:47:14,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2106852236] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:14,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:14,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:47:14,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72725052] [2022-04-07 00:47:14,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:14,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-07 00:47:14,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:14,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-07 00:47:14,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-07 00:47:14,165 INFO L87 Difference]: Start difference. First operand 623 states and 791 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:15,454 INFO L93 Difference]: Finished difference Result 681 states and 860 transitions. [2022-04-07 00:47:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:47:15,455 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 7 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 [2022-04-07 00:47:15,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:15,459 INFO L225 Difference]: With dead ends: 681 [2022-04-07 00:47:15,459 INFO L226 Difference]: Without dead ends: 659 [2022-04-07 00:47:15,460 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:47:15,461 INFO L913 BasicCegarLoop]: 414 mSDtfsCounter, 782 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:15,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 1006 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-07 00:47:15,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-04-07 00:47:15,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 624. [2022-04-07 00:47:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 499 states have (on average 1.2745490981963927) internal successors, (636), 509 states have internal predecessors, (636), 71 states have call successors, (71), 46 states have call predecessors, (71), 53 states have return successors, (85), 69 states have call predecessors, (85), 63 states have call successors, (85) [2022-04-07 00:47:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 792 transitions. [2022-04-07 00:47:15,562 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 792 transitions. Word has length 51 [2022-04-07 00:47:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:15,562 INFO L478 AbstractCegarLoop]: Abstraction has 624 states and 792 transitions. [2022-04-07 00:47:15,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 792 transitions. [2022-04-07 00:47:15,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-07 00:47:15,564 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:15,564 INFO L499 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] [2022-04-07 00:47:15,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-04-07 00:47:15,565 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:15,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:15,565 INFO L85 PathProgramCache]: Analyzing trace with hash 325068325, now seen corresponding path program 1 times [2022-04-07 00:47:15,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:15,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [496603834] [2022-04-07 00:47:15,565 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:15,565 INFO L85 PathProgramCache]: Analyzing trace with hash 325068325, now seen corresponding path program 2 times [2022-04-07 00:47:15,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:15,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534617279] [2022-04-07 00:47:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:15,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:15,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:15,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:15,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:15,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:15,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:47:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:15,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:15,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534617279] [2022-04-07 00:47:15,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534617279] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:15,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:15,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:47:15,720 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:15,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [496603834] [2022-04-07 00:47:15,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [496603834] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:15,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:15,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:47:15,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528325916] [2022-04-07 00:47:15,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:15,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-07 00:47:15,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:15,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-07 00:47:15,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-07 00:47:15,721 INFO L87 Difference]: Start difference. First operand 624 states and 792 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:47:17,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:17,006 INFO L93 Difference]: Finished difference Result 676 states and 851 transitions. [2022-04-07 00:47:17,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:47:17,006 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2022-04-07 00:47:17,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:17,009 INFO L225 Difference]: With dead ends: 676 [2022-04-07 00:47:17,009 INFO L226 Difference]: Without dead ends: 648 [2022-04-07 00:47:17,009 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:47:17,010 INFO L913 BasicCegarLoop]: 441 mSDtfsCounter, 399 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:17,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1401 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1750 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-07 00:47:17,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-04-07 00:47:17,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 616. [2022-04-07 00:47:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 491 states have (on average 1.2688391038696538) internal successors, (623), 501 states have internal predecessors, (623), 71 states have call successors, (71), 46 states have call predecessors, (71), 53 states have return successors, (85), 69 states have call predecessors, (85), 63 states have call successors, (85) [2022-04-07 00:47:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 779 transitions. [2022-04-07 00:47:17,120 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 779 transitions. Word has length 51 [2022-04-07 00:47:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:17,120 INFO L478 AbstractCegarLoop]: Abstraction has 616 states and 779 transitions. [2022-04-07 00:47:17,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:47:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 779 transitions. [2022-04-07 00:47:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-07 00:47:17,132 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:17,132 INFO L499 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] [2022-04-07 00:47:17,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-04-07 00:47:17,132 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:17,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:17,133 INFO L85 PathProgramCache]: Analyzing trace with hash 519788489, now seen corresponding path program 1 times [2022-04-07 00:47:17,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:17,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [440385144] [2022-04-07 00:47:17,133 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:17,133 INFO L85 PathProgramCache]: Analyzing trace with hash 519788489, now seen corresponding path program 2 times [2022-04-07 00:47:17,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:17,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675304564] [2022-04-07 00:47:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:17,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:17,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:17,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:17,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:17,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:17,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:17,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:17,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675304564] [2022-04-07 00:47:17,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675304564] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:17,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:17,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:47:17,287 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:17,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [440385144] [2022-04-07 00:47:17,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [440385144] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:17,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:17,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:47:17,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041154399] [2022-04-07 00:47:17,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:17,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:47:17,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:17,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:47:17,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:47:17,288 INFO L87 Difference]: Start difference. First operand 616 states and 779 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:18,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:18,389 INFO L93 Difference]: Finished difference Result 865 states and 1111 transitions. [2022-04-07 00:47:18,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:47:18,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 7 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 52 [2022-04-07 00:47:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:18,392 INFO L225 Difference]: With dead ends: 865 [2022-04-07 00:47:18,392 INFO L226 Difference]: Without dead ends: 832 [2022-04-07 00:47:18,394 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:47:18,394 INFO L913 BasicCegarLoop]: 543 mSDtfsCounter, 539 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:18,395 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 927 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:47:18,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-04-07 00:47:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 659. [2022-04-07 00:47:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 527 states have (on average 1.2580645161290323) internal successors, (663), 530 states have internal predecessors, (663), 73 states have call successors, (73), 48 states have call predecessors, (73), 58 states have return successors, (97), 81 states have call predecessors, (97), 65 states have call successors, (97) [2022-04-07 00:47:18,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 833 transitions. [2022-04-07 00:47:18,550 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 833 transitions. Word has length 52 [2022-04-07 00:47:18,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:18,551 INFO L478 AbstractCegarLoop]: Abstraction has 659 states and 833 transitions. [2022-04-07 00:47:18,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:18,551 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 833 transitions. [2022-04-07 00:47:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-07 00:47:18,552 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:18,552 INFO L499 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] [2022-04-07 00:47:18,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-04-07 00:47:18,552 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:18,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:18,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1964857033, now seen corresponding path program 1 times [2022-04-07 00:47:18,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:18,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [51549931] [2022-04-07 00:47:18,552 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:18,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1964857033, now seen corresponding path program 2 times [2022-04-07 00:47:18,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:18,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832203804] [2022-04-07 00:47:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:18,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:18,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:18,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:18,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:18,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:18,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:18,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:18,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832203804] [2022-04-07 00:47:18,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832203804] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:18,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:18,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:47:18,755 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:18,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [51549931] [2022-04-07 00:47:18,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [51549931] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:18,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:18,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:47:18,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145582649] [2022-04-07 00:47:18,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:18,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:47:18,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:18,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:47:18,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:47:18,756 INFO L87 Difference]: Start difference. First operand 659 states and 833 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:47:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:19,777 INFO L93 Difference]: Finished difference Result 1092 states and 1408 transitions. [2022-04-07 00:47:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:47:19,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 7 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 52 [2022-04-07 00:47:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:19,780 INFO L225 Difference]: With dead ends: 1092 [2022-04-07 00:47:19,780 INFO L226 Difference]: Without dead ends: 714 [2022-04-07 00:47:19,781 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:47:19,785 INFO L913 BasicCegarLoop]: 398 mSDtfsCounter, 1420 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:19,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 867 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-07 00:47:19,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-04-07 00:47:19,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 666. [2022-04-07 00:47:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 534 states have (on average 1.2602996254681649) internal successors, (673), 537 states have internal predecessors, (673), 73 states have call successors, (73), 48 states have call predecessors, (73), 58 states have return successors, (97), 81 states have call predecessors, (97), 65 states have call successors, (97) [2022-04-07 00:47:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 843 transitions. [2022-04-07 00:47:19,897 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 843 transitions. Word has length 52 [2022-04-07 00:47:19,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:19,897 INFO L478 AbstractCegarLoop]: Abstraction has 666 states and 843 transitions. [2022-04-07 00:47:19,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:47:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 843 transitions. [2022-04-07 00:47:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-07 00:47:19,899 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:19,899 INFO L499 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] [2022-04-07 00:47:19,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-04-07 00:47:19,899 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:19,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:19,899 INFO L85 PathProgramCache]: Analyzing trace with hash 376509131, now seen corresponding path program 1 times [2022-04-07 00:47:19,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:19,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [156407066] [2022-04-07 00:47:19,900 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:19,900 INFO L85 PathProgramCache]: Analyzing trace with hash 376509131, now seen corresponding path program 2 times [2022-04-07 00:47:19,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:19,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931911989] [2022-04-07 00:47:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:19,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:19,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:19,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:20,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:20,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:20,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:20,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:20,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931911989] [2022-04-07 00:47:20,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931911989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:20,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:20,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:47:20,076 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:20,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [156407066] [2022-04-07 00:47:20,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [156407066] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:20,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:20,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:47:20,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351719905] [2022-04-07 00:47:20,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:20,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:47:20,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:20,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:47:20,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:47:20,077 INFO L87 Difference]: Start difference. First operand 666 states and 843 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:47:21,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:21,620 INFO L93 Difference]: Finished difference Result 731 states and 921 transitions. [2022-04-07 00:47:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-07 00:47:21,620 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 7 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 52 [2022-04-07 00:47:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:21,636 INFO L225 Difference]: With dead ends: 731 [2022-04-07 00:47:21,636 INFO L226 Difference]: Without dead ends: 610 [2022-04-07 00:47:21,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-04-07 00:47:21,651 INFO L913 BasicCegarLoop]: 400 mSDtfsCounter, 1244 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:21,653 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1251 Valid, 1048 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:47:21,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-04-07 00:47:21,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 575. [2022-04-07 00:47:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 455 states have (on average 1.2747252747252746) internal successors, (580), 465 states have internal predecessors, (580), 69 states have call successors, (69), 44 states have call predecessors, (69), 50 states have return successors, (82), 66 states have call predecessors, (82), 61 states have call successors, (82) [2022-04-07 00:47:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 731 transitions. [2022-04-07 00:47:21,781 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 731 transitions. Word has length 52 [2022-04-07 00:47:21,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:21,783 INFO L478 AbstractCegarLoop]: Abstraction has 575 states and 731 transitions. [2022-04-07 00:47:21,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:47:21,783 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 731 transitions. [2022-04-07 00:47:21,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-07 00:47:21,784 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:21,784 INFO L499 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] [2022-04-07 00:47:21,784 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-04-07 00:47:21,784 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:21,784 INFO L85 PathProgramCache]: Analyzing trace with hash -614500354, now seen corresponding path program 1 times [2022-04-07 00:47:21,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:21,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1149700716] [2022-04-07 00:47:21,785 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:21,786 INFO L85 PathProgramCache]: Analyzing trace with hash -614500354, now seen corresponding path program 2 times [2022-04-07 00:47:21,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:21,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389109304] [2022-04-07 00:47:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:21,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:21,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:21,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:21,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:21,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:21,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:22,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:22,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389109304] [2022-04-07 00:47:22,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389109304] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:22,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:22,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:47:22,010 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:22,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1149700716] [2022-04-07 00:47:22,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1149700716] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:22,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:22,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:47:22,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572615220] [2022-04-07 00:47:22,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:22,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:47:22,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:22,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:47:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:47:22,011 INFO L87 Difference]: Start difference. First operand 575 states and 731 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:23,275 INFO L93 Difference]: Finished difference Result 609 states and 770 transitions. [2022-04-07 00:47:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:47:23,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 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 53 [2022-04-07 00:47:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:23,277 INFO L225 Difference]: With dead ends: 609 [2022-04-07 00:47:23,277 INFO L226 Difference]: Without dead ends: 605 [2022-04-07 00:47:23,278 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:47:23,278 INFO L913 BasicCegarLoop]: 407 mSDtfsCounter, 443 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 2474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:23,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 1585 Invalid, 2474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2303 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:47:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-04-07 00:47:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 583. [2022-04-07 00:47:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 462 states have (on average 1.2705627705627707) internal successors, (587), 472 states have internal predecessors, (587), 69 states have call successors, (69), 44 states have call predecessors, (69), 51 states have return successors, (83), 67 states have call predecessors, (83), 61 states have call successors, (83) [2022-04-07 00:47:23,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 739 transitions. [2022-04-07 00:47:23,469 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 739 transitions. Word has length 53 [2022-04-07 00:47:23,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:23,471 INFO L478 AbstractCegarLoop]: Abstraction has 583 states and 739 transitions. [2022-04-07 00:47:23,471 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:23,471 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 739 transitions. [2022-04-07 00:47:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-07 00:47:23,488 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:23,488 INFO L499 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] [2022-04-07 00:47:23,488 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-04-07 00:47:23,489 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:23,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:23,489 INFO L85 PathProgramCache]: Analyzing trace with hash -614777184, now seen corresponding path program 1 times [2022-04-07 00:47:23,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:23,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [530243458] [2022-04-07 00:47:23,490 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:23,490 INFO L85 PathProgramCache]: Analyzing trace with hash -614777184, now seen corresponding path program 2 times [2022-04-07 00:47:23,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:23,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912634688] [2022-04-07 00:47:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:23,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:23,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:23,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:23,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:23,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:23,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:23,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:23,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912634688] [2022-04-07 00:47:23,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912634688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:23,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:23,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:47:23,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:23,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [530243458] [2022-04-07 00:47:23,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [530243458] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:23,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:23,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:47:23,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719045778] [2022-04-07 00:47:23,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:23,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:47:23,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:23,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:47:23,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:47:23,793 INFO L87 Difference]: Start difference. First operand 583 states and 739 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:24,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:24,913 INFO L93 Difference]: Finished difference Result 644 states and 823 transitions. [2022-04-07 00:47:24,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:47:24,914 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 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 53 [2022-04-07 00:47:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:24,916 INFO L225 Difference]: With dead ends: 644 [2022-04-07 00:47:24,916 INFO L226 Difference]: Without dead ends: 629 [2022-04-07 00:47:24,917 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:47:24,917 INFO L913 BasicCegarLoop]: 404 mSDtfsCounter, 529 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:24,917 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 1604 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1878 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:47:24,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-04-07 00:47:25,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 589. [2022-04-07 00:47:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 467 states have (on average 1.2676659528907923) internal successors, (592), 478 states have internal predecessors, (592), 69 states have call successors, (69), 44 states have call predecessors, (69), 52 states have return successors, (90), 67 states have call predecessors, (90), 61 states have call successors, (90) [2022-04-07 00:47:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 751 transitions. [2022-04-07 00:47:25,062 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 751 transitions. Word has length 53 [2022-04-07 00:47:25,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:25,063 INFO L478 AbstractCegarLoop]: Abstraction has 589 states and 751 transitions. [2022-04-07 00:47:25,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:25,063 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 751 transitions. [2022-04-07 00:47:25,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-07 00:47:25,068 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:25,068 INFO L499 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] [2022-04-07 00:47:25,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-04-07 00:47:25,068 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:25,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:25,068 INFO L85 PathProgramCache]: Analyzing trace with hash -903470965, now seen corresponding path program 1 times [2022-04-07 00:47:25,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:25,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2044363815] [2022-04-07 00:47:25,069 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:25,069 INFO L85 PathProgramCache]: Analyzing trace with hash -903470965, now seen corresponding path program 2 times [2022-04-07 00:47:25,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:25,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884829559] [2022-04-07 00:47:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:25,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:25,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:25,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:25,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:25,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:25,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:25,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:25,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884829559] [2022-04-07 00:47:25,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884829559] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:25,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:25,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:47:25,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:25,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2044363815] [2022-04-07 00:47:25,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2044363815] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:25,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:25,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:47:25,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234841844] [2022-04-07 00:47:25,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:25,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:47:25,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:25,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:47:25,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:47:25,230 INFO L87 Difference]: Start difference. First operand 589 states and 751 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:47:26,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:26,663 INFO L93 Difference]: Finished difference Result 758 states and 985 transitions. [2022-04-07 00:47:26,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-07 00:47:26,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 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 54 [2022-04-07 00:47:26,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:26,666 INFO L225 Difference]: With dead ends: 758 [2022-04-07 00:47:26,666 INFO L226 Difference]: Without dead ends: 740 [2022-04-07 00:47:26,667 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:47:26,667 INFO L913 BasicCegarLoop]: 517 mSDtfsCounter, 954 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:26,667 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 921 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:47:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-04-07 00:47:26,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 573. [2022-04-07 00:47:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 454 states have (on average 1.2731277533039647) internal successors, (578), 464 states have internal predecessors, (578), 68 states have call successors, (68), 44 states have call predecessors, (68), 50 states have return successors, (81), 65 states have call predecessors, (81), 60 states have call successors, (81) [2022-04-07 00:47:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 727 transitions. [2022-04-07 00:47:26,799 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 727 transitions. Word has length 54 [2022-04-07 00:47:26,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:26,800 INFO L478 AbstractCegarLoop]: Abstraction has 573 states and 727 transitions. [2022-04-07 00:47:26,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:47:26,800 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 727 transitions. [2022-04-07 00:47:26,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-07 00:47:26,816 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:26,816 INFO L499 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] [2022-04-07 00:47:26,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-04-07 00:47:26,816 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:26,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:26,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1947373933, now seen corresponding path program 1 times [2022-04-07 00:47:26,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:26,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [43973502] [2022-04-07 00:47:26,819 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:26,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1947373933, now seen corresponding path program 2 times [2022-04-07 00:47:26,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:26,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500452099] [2022-04-07 00:47:26,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:26,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:26,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:27,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:27,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:27,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:27,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:47:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:27,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:47:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:27,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:27,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500452099] [2022-04-07 00:47:27,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500452099] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:27,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:27,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:47:27,116 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:27,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [43973502] [2022-04-07 00:47:27,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [43973502] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:27,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:27,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:47:27,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199542317] [2022-04-07 00:47:27,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:27,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:47:27,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:27,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:47:27,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:47:27,118 INFO L87 Difference]: Start difference. First operand 573 states and 727 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:47:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:28,530 INFO L93 Difference]: Finished difference Result 608 states and 766 transitions. [2022-04-07 00:47:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:47:28,530 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-04-07 00:47:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:28,532 INFO L225 Difference]: With dead ends: 608 [2022-04-07 00:47:28,533 INFO L226 Difference]: Without dead ends: 580 [2022-04-07 00:47:28,533 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:47:28,533 INFO L913 BasicCegarLoop]: 401 mSDtfsCounter, 363 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 2474 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:28,533 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1678 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2474 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-07 00:47:28,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-04-07 00:47:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 561. [2022-04-07 00:47:28,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 445 states have (on average 1.2719101123595506) internal successors, (566), 455 states have internal predecessors, (566), 66 states have call successors, (66), 43 states have call predecessors, (66), 49 states have return successors, (79), 63 states have call predecessors, (79), 58 states have call successors, (79) [2022-04-07 00:47:28,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 711 transitions. [2022-04-07 00:47:28,702 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 711 transitions. Word has length 55 [2022-04-07 00:47:28,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:28,703 INFO L478 AbstractCegarLoop]: Abstraction has 561 states and 711 transitions. [2022-04-07 00:47:28,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:47:28,703 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 711 transitions. [2022-04-07 00:47:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-07 00:47:28,704 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:28,704 INFO L499 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] [2022-04-07 00:47:28,704 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-04-07 00:47:28,704 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:28,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:28,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1340373320, now seen corresponding path program 1 times [2022-04-07 00:47:28,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:28,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1455871119] [2022-04-07 00:47:28,705 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:28,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1340373320, now seen corresponding path program 2 times [2022-04-07 00:47:28,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:28,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101523885] [2022-04-07 00:47:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:28,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:28,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:28,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:28,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:28,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-07 00:47:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:28,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:47:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:28,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-07 00:47:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:28,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:28,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101523885] [2022-04-07 00:47:28,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101523885] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:28,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:28,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:47:28,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:28,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1455871119] [2022-04-07 00:47:28,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1455871119] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:28,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:28,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:47:28,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144972371] [2022-04-07 00:47:28,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:28,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:47:28,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:28,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:47:28,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:47:28,880 INFO L87 Difference]: Start difference. First operand 561 states and 711 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:47:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:29,678 INFO L93 Difference]: Finished difference Result 898 states and 1149 transitions. [2022-04-07 00:47:29,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:47:29,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2022-04-07 00:47:29,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:29,690 INFO L225 Difference]: With dead ends: 898 [2022-04-07 00:47:29,691 INFO L226 Difference]: Without dead ends: 589 [2022-04-07 00:47:29,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:47:29,692 INFO L913 BasicCegarLoop]: 385 mSDtfsCounter, 393 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:29,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 817 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:47:29,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-04-07 00:47:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 566. [2022-04-07 00:47:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 449 states have (on average 1.265033407572383) internal successors, (568), 460 states have internal predecessors, (568), 66 states have call successors, (66), 43 states have call predecessors, (66), 50 states have return successors, (83), 63 states have call predecessors, (83), 58 states have call successors, (83) [2022-04-07 00:47:29,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 717 transitions. [2022-04-07 00:47:29,884 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 717 transitions. Word has length 58 [2022-04-07 00:47:29,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:29,884 INFO L478 AbstractCegarLoop]: Abstraction has 566 states and 717 transitions. [2022-04-07 00:47:29,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:47:29,884 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 717 transitions. [2022-04-07 00:47:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-07 00:47:29,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:29,896 INFO L499 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] [2022-04-07 00:47:29,896 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-04-07 00:47:29,896 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:29,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1752890422, now seen corresponding path program 1 times [2022-04-07 00:47:29,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:29,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1672561336] [2022-04-07 00:47:29,896 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:29,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1752890422, now seen corresponding path program 2 times [2022-04-07 00:47:29,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:29,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962027955] [2022-04-07 00:47:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:29,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:30,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:30,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:30,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:30,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-07 00:47:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:30,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:47:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:30,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:47:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:30,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:30,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962027955] [2022-04-07 00:47:30,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962027955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:30,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:30,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:47:30,202 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:30,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1672561336] [2022-04-07 00:47:30,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1672561336] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:30,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:30,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:47:30,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105868809] [2022-04-07 00:47:30,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:30,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:47:30,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:30,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:47:30,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:47:30,204 INFO L87 Difference]: Start difference. First operand 566 states and 717 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:47:31,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:31,467 INFO L93 Difference]: Finished difference Result 852 states and 1088 transitions. [2022-04-07 00:47:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:47:31,467 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 64 [2022-04-07 00:47:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:31,469 INFO L225 Difference]: With dead ends: 852 [2022-04-07 00:47:31,469 INFO L226 Difference]: Without dead ends: 538 [2022-04-07 00:47:31,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:47:31,472 INFO L913 BasicCegarLoop]: 388 mSDtfsCounter, 302 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:31,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1212 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:47:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-04-07 00:47:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 511. [2022-04-07 00:47:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 402 states have (on average 1.2537313432835822) internal successors, (504), 410 states have internal predecessors, (504), 63 states have call successors, (63), 42 states have call predecessors, (63), 45 states have return successors, (72), 59 states have call predecessors, (72), 56 states have call successors, (72) [2022-04-07 00:47:31,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 639 transitions. [2022-04-07 00:47:31,736 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 639 transitions. Word has length 64 [2022-04-07 00:47:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:31,737 INFO L478 AbstractCegarLoop]: Abstraction has 511 states and 639 transitions. [2022-04-07 00:47:31,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:47:31,737 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 639 transitions. [2022-04-07 00:47:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-07 00:47:31,738 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:31,738 INFO L499 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] [2022-04-07 00:47:31,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-04-07 00:47:31,738 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:31,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:31,738 INFO L85 PathProgramCache]: Analyzing trace with hash -557797138, now seen corresponding path program 1 times [2022-04-07 00:47:31,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:31,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [358555154] [2022-04-07 00:47:31,738 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:31,739 INFO L85 PathProgramCache]: Analyzing trace with hash -557797138, now seen corresponding path program 2 times [2022-04-07 00:47:31,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:31,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279474786] [2022-04-07 00:47:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:31,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:31,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:31,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:31,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:31,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:32,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:47:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:32,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-07 00:47:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:32,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:32,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279474786] [2022-04-07 00:47:32,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279474786] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:32,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:32,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:47:32,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:32,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [358555154] [2022-04-07 00:47:32,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [358555154] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:32,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:32,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:47:32,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989245793] [2022-04-07 00:47:32,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:32,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:47:32,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:32,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:47:32,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:47:32,061 INFO L87 Difference]: Start difference. First operand 511 states and 639 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 6 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) [2022-04-07 00:47:33,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:33,425 INFO L93 Difference]: Finished difference Result 545 states and 678 transitions. [2022-04-07 00:47:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-07 00:47:33,425 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 6 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 [2022-04-07 00:47:33,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:33,427 INFO L225 Difference]: With dead ends: 545 [2022-04-07 00:47:33,427 INFO L226 Difference]: Without dead ends: 524 [2022-04-07 00:47:33,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:47:33,428 INFO L913 BasicCegarLoop]: 377 mSDtfsCounter, 507 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:33,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 1185 Invalid, 2737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:47:33,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-04-07 00:47:33,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 508. [2022-04-07 00:47:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 399 states have (on average 1.255639097744361) internal successors, (501), 408 states have internal predecessors, (501), 63 states have call successors, (63), 42 states have call predecessors, (63), 45 states have return successors, (71), 58 states have call predecessors, (71), 56 states have call successors, (71) [2022-04-07 00:47:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 635 transitions. [2022-04-07 00:47:33,538 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 635 transitions. Word has length 59 [2022-04-07 00:47:33,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:33,539 INFO L478 AbstractCegarLoop]: Abstraction has 508 states and 635 transitions. [2022-04-07 00:47:33,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 6 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) [2022-04-07 00:47:33,539 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 635 transitions. [2022-04-07 00:47:33,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-07 00:47:33,539 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:33,539 INFO L499 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] [2022-04-07 00:47:33,540 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-04-07 00:47:33,552 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:33,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2048336817, now seen corresponding path program 1 times [2022-04-07 00:47:33,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:33,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2022224945] [2022-04-07 00:47:33,554 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:33,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2048336817, now seen corresponding path program 2 times [2022-04-07 00:47:33,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:33,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200212039] [2022-04-07 00:47:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:33,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:33,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:33,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:33,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:33,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:47:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:33,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-07 00:47:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:33,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:33,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200212039] [2022-04-07 00:47:33,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200212039] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:33,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:33,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:47:33,993 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:33,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2022224945] [2022-04-07 00:47:33,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2022224945] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:33,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:33,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:47:33,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129312674] [2022-04-07 00:47:33,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:33,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:47:33,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:33,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:47:33,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:47:33,994 INFO L87 Difference]: Start difference. First operand 508 states and 635 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:34,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:34,986 INFO L93 Difference]: Finished difference Result 538 states and 669 transitions. [2022-04-07 00:47:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:47:34,987 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 7 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 58 [2022-04-07 00:47:34,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:34,988 INFO L225 Difference]: With dead ends: 538 [2022-04-07 00:47:34,988 INFO L226 Difference]: Without dead ends: 520 [2022-04-07 00:47:34,989 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:47:34,989 INFO L913 BasicCegarLoop]: 391 mSDtfsCounter, 366 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:34,989 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 1556 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:47:34,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-04-07 00:47:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 504. [2022-04-07 00:47:35,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 396 states have (on average 1.255050505050505) internal successors, (497), 405 states have internal predecessors, (497), 62 states have call successors, (62), 42 states have call predecessors, (62), 45 states have return successors, (70), 57 states have call predecessors, (70), 55 states have call successors, (70) [2022-04-07 00:47:35,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 629 transitions. [2022-04-07 00:47:35,083 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 629 transitions. Word has length 58 [2022-04-07 00:47:35,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:35,084 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 629 transitions. [2022-04-07 00:47:35,084 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 629 transitions. [2022-04-07 00:47:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-07 00:47:35,085 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:35,085 INFO L499 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] [2022-04-07 00:47:35,085 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-04-07 00:47:35,085 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:35,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:35,098 INFO L85 PathProgramCache]: Analyzing trace with hash 853367933, now seen corresponding path program 1 times [2022-04-07 00:47:35,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:35,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [925208703] [2022-04-07 00:47:35,098 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:35,098 INFO L85 PathProgramCache]: Analyzing trace with hash 853367933, now seen corresponding path program 2 times [2022-04-07 00:47:35,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:35,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211514777] [2022-04-07 00:47:35,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:35,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:35,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:35,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:35,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:35,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:47:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:35,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-07 00:47:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:35,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-07 00:47:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:35,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:35,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211514777] [2022-04-07 00:47:35,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211514777] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:35,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:35,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:47:35,341 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:35,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [925208703] [2022-04-07 00:47:35,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [925208703] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:35,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:35,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:47:35,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075268019] [2022-04-07 00:47:35,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:35,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:47:35,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:35,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:47:35,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:47:35,342 INFO L87 Difference]: Start difference. First operand 504 states and 629 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 5 states have internal predecessors, (46), 3 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) [2022-04-07 00:47:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:36,461 INFO L93 Difference]: Finished difference Result 539 states and 669 transitions. [2022-04-07 00:47:36,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:47:36,462 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 5 states have internal predecessors, (46), 3 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 [2022-04-07 00:47:36,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:36,472 INFO L225 Difference]: With dead ends: 539 [2022-04-07 00:47:36,472 INFO L226 Difference]: Without dead ends: 515 [2022-04-07 00:47:36,473 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:47:36,473 INFO L913 BasicCegarLoop]: 362 mSDtfsCounter, 399 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:36,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 843 Invalid, 2109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:47:36,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-04-07 00:47:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 499. [2022-04-07 00:47:36,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 393 states have (on average 1.251908396946565) internal successors, (492), 401 states have internal predecessors, (492), 61 states have call successors, (61), 42 states have call predecessors, (61), 44 states have return successors, (68), 56 states have call predecessors, (68), 54 states have call successors, (68) [2022-04-07 00:47:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 621 transitions. [2022-04-07 00:47:36,569 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 621 transitions. Word has length 60 [2022-04-07 00:47:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:36,570 INFO L478 AbstractCegarLoop]: Abstraction has 499 states and 621 transitions. [2022-04-07 00:47:36,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 5 states have internal predecessors, (46), 3 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) [2022-04-07 00:47:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 621 transitions. [2022-04-07 00:47:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-07 00:47:36,570 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:36,571 INFO L499 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] [2022-04-07 00:47:36,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-04-07 00:47:36,571 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:36,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:36,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1746189105, now seen corresponding path program 1 times [2022-04-07 00:47:36,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:36,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1624830777] [2022-04-07 00:47:36,572 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:36,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1746189105, now seen corresponding path program 2 times [2022-04-07 00:47:36,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:36,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449030114] [2022-04-07 00:47:36,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:36,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:36,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:36,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:36,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:36,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-07 00:47:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:36,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:47:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:36,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:47:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:36,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:47:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:36,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:36,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449030114] [2022-04-07 00:47:36,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449030114] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:36,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:36,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:47:36,822 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:36,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1624830777] [2022-04-07 00:47:36,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1624830777] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:36,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:36,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:47:36,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212091209] [2022-04-07 00:47:36,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:36,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:47:36,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:36,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:47:36,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:47:36,823 INFO L87 Difference]: Start difference. First operand 499 states and 621 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:47:38,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:38,016 INFO L93 Difference]: Finished difference Result 780 states and 980 transitions. [2022-04-07 00:47:38,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:47:38,016 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2022-04-07 00:47:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:38,018 INFO L225 Difference]: With dead ends: 780 [2022-04-07 00:47:38,018 INFO L226 Difference]: Without dead ends: 521 [2022-04-07 00:47:38,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:47:38,020 INFO L913 BasicCegarLoop]: 357 mSDtfsCounter, 624 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:38,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 1041 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:47:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-04-07 00:47:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 499. [2022-04-07 00:47:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 393 states have (on average 1.2468193384223918) internal successors, (490), 401 states have internal predecessors, (490), 61 states have call successors, (61), 42 states have call predecessors, (61), 44 states have return successors, (68), 56 states have call predecessors, (68), 54 states have call successors, (68) [2022-04-07 00:47:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 619 transitions. [2022-04-07 00:47:38,178 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 619 transitions. Word has length 68 [2022-04-07 00:47:38,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:38,180 INFO L478 AbstractCegarLoop]: Abstraction has 499 states and 619 transitions. [2022-04-07 00:47:38,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:47:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 619 transitions. [2022-04-07 00:47:38,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-07 00:47:38,180 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:38,181 INFO L499 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] [2022-04-07 00:47:38,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-04-07 00:47:38,181 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:38,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:38,181 INFO L85 PathProgramCache]: Analyzing trace with hash -662819238, now seen corresponding path program 1 times [2022-04-07 00:47:38,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:38,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [593424004] [2022-04-07 00:47:38,182 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:38,182 INFO L85 PathProgramCache]: Analyzing trace with hash -662819238, now seen corresponding path program 2 times [2022-04-07 00:47:38,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:38,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53968566] [2022-04-07 00:47:38,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:38,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:38,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:38,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:38,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:38,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:38,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:47:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:38,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:47:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:38,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:38,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53968566] [2022-04-07 00:47:38,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53968566] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:38,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:38,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:47:38,388 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:38,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [593424004] [2022-04-07 00:47:38,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [593424004] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:38,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:38,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:47:38,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875131534] [2022-04-07 00:47:38,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:38,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:47:38,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:38,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:47:38,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:47:38,390 INFO L87 Difference]: Start difference. First operand 499 states and 619 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:47:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:39,847 INFO L93 Difference]: Finished difference Result 611 states and 749 transitions. [2022-04-07 00:47:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:47:39,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2022-04-07 00:47:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:39,849 INFO L225 Difference]: With dead ends: 611 [2022-04-07 00:47:39,849 INFO L226 Difference]: Without dead ends: 519 [2022-04-07 00:47:39,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:47:39,850 INFO L913 BasicCegarLoop]: 359 mSDtfsCounter, 257 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:39,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 814 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-07 00:47:39,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-04-07 00:47:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 503. [2022-04-07 00:47:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 396 states have (on average 1.244949494949495) internal successors, (493), 404 states have internal predecessors, (493), 61 states have call successors, (61), 42 states have call predecessors, (61), 45 states have return successors, (69), 57 states have call predecessors, (69), 54 states have call successors, (69) [2022-04-07 00:47:40,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 623 transitions. [2022-04-07 00:47:40,068 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 623 transitions. Word has length 63 [2022-04-07 00:47:40,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:40,069 INFO L478 AbstractCegarLoop]: Abstraction has 503 states and 623 transitions. [2022-04-07 00:47:40,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:47:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 623 transitions. [2022-04-07 00:47:40,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-07 00:47:40,069 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:40,070 INFO L499 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] [2022-04-07 00:47:40,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-04-07 00:47:40,070 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:40,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:40,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1616978329, now seen corresponding path program 1 times [2022-04-07 00:47:40,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:40,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1035496270] [2022-04-07 00:47:40,075 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:40,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1616978329, now seen corresponding path program 2 times [2022-04-07 00:47:40,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:40,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817438521] [2022-04-07 00:47:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:40,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:40,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:40,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:40,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:40,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:40,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:47:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:40,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:47:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:40,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:40,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817438521] [2022-04-07 00:47:40,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817438521] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:40,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:40,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:47:40,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:40,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1035496270] [2022-04-07 00:47:40,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1035496270] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:40,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:40,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:47:40,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124047913] [2022-04-07 00:47:40,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:40,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:47:40,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:40,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:47:40,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:47:40,377 INFO L87 Difference]: Start difference. First operand 503 states and 623 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:47:41,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:41,696 INFO L93 Difference]: Finished difference Result 529 states and 653 transitions. [2022-04-07 00:47:41,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:47:41,696 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2022-04-07 00:47:41,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:41,698 INFO L225 Difference]: With dead ends: 529 [2022-04-07 00:47:41,698 INFO L226 Difference]: Without dead ends: 505 [2022-04-07 00:47:41,699 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:47:41,699 INFO L913 BasicCegarLoop]: 352 mSDtfsCounter, 429 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 2231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:41,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 972 Invalid, 2231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2109 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-07 00:47:41,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-04-07 00:47:41,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 489. [2022-04-07 00:47:41,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 384 states have (on average 1.2395833333333333) internal successors, (476), 391 states have internal predecessors, (476), 60 states have call successors, (60), 42 states have call predecessors, (60), 44 states have return successors, (68), 56 states have call predecessors, (68), 54 states have call successors, (68) [2022-04-07 00:47:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 604 transitions. [2022-04-07 00:47:41,840 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 604 transitions. Word has length 63 [2022-04-07 00:47:41,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:41,840 INFO L478 AbstractCegarLoop]: Abstraction has 489 states and 604 transitions. [2022-04-07 00:47:41,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:47:41,840 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 604 transitions. [2022-04-07 00:47:41,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-07 00:47:41,841 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:41,841 INFO L499 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] [2022-04-07 00:47:41,841 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-04-07 00:47:41,841 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:41,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:41,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1834799191, now seen corresponding path program 1 times [2022-04-07 00:47:41,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:41,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [88056169] [2022-04-07 00:47:41,842 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:41,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1834799191, now seen corresponding path program 2 times [2022-04-07 00:47:41,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:41,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849558795] [2022-04-07 00:47:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:41,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:41,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:41,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:41,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:42,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:47:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:42,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:42,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:42,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849558795] [2022-04-07 00:47:42,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849558795] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:42,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:42,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:47:42,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:42,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [88056169] [2022-04-07 00:47:42,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [88056169] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:42,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:42,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:47:42,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29007759] [2022-04-07 00:47:42,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:42,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:47:42,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:42,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:47:42,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:47:42,074 INFO L87 Difference]: Start difference. First operand 489 states and 604 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:43,350 INFO L93 Difference]: Finished difference Result 522 states and 642 transitions. [2022-04-07 00:47:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:47:43,351 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (7), 7 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 63 [2022-04-07 00:47:43,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:43,352 INFO L225 Difference]: With dead ends: 522 [2022-04-07 00:47:43,353 INFO L226 Difference]: Without dead ends: 501 [2022-04-07 00:47:43,354 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:47:43,359 INFO L913 BasicCegarLoop]: 369 mSDtfsCounter, 308 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:43,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 1667 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:47:43,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-04-07 00:47:43,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 485. [2022-04-07 00:47:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 381 states have (on average 1.2388451443569555) internal successors, (472), 388 states have internal predecessors, (472), 59 states have call successors, (59), 42 states have call predecessors, (59), 44 states have return successors, (67), 55 states have call predecessors, (67), 53 states have call successors, (67) [2022-04-07 00:47:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 598 transitions. [2022-04-07 00:47:43,448 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 598 transitions. Word has length 63 [2022-04-07 00:47:43,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:43,450 INFO L478 AbstractCegarLoop]: Abstraction has 485 states and 598 transitions. [2022-04-07 00:47:43,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:43,450 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 598 transitions. [2022-04-07 00:47:43,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-07 00:47:43,451 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:43,451 INFO L499 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] [2022-04-07 00:47:43,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-04-07 00:47:43,451 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:43,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2018781837, now seen corresponding path program 1 times [2022-04-07 00:47:43,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:43,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [945039041] [2022-04-07 00:47:43,452 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:43,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2018781837, now seen corresponding path program 2 times [2022-04-07 00:47:43,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:43,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479591515] [2022-04-07 00:47:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:43,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:43,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:43,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:43,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:43,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-07 00:47:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:43,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:47:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:43,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:47:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:43,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:47:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:43,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:43,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479591515] [2022-04-07 00:47:43,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479591515] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:43,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:43,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:47:43,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:43,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [945039041] [2022-04-07 00:47:43,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [945039041] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:43,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:43,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:47:43,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050164071] [2022-04-07 00:47:43,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:43,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:47:43,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:43,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:47:43,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:47:43,738 INFO L87 Difference]: Start difference. First operand 485 states and 598 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-07 00:47:45,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:45,009 INFO L93 Difference]: Finished difference Result 746 states and 929 transitions. [2022-04-07 00:47:45,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-07 00:47:45,009 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), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 71 [2022-04-07 00:47:45,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:45,011 INFO L225 Difference]: With dead ends: 746 [2022-04-07 00:47:45,011 INFO L226 Difference]: Without dead ends: 520 [2022-04-07 00:47:45,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:47:45,012 INFO L913 BasicCegarLoop]: 371 mSDtfsCounter, 552 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:45,012 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 1349 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-07 00:47:45,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-04-07 00:47:45,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 485. [2022-04-07 00:47:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 381 states have (on average 1.2335958005249343) internal successors, (470), 388 states have internal predecessors, (470), 59 states have call successors, (59), 42 states have call predecessors, (59), 44 states have return successors, (67), 55 states have call predecessors, (67), 53 states have call successors, (67) [2022-04-07 00:47:45,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 596 transitions. [2022-04-07 00:47:45,196 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 596 transitions. Word has length 71 [2022-04-07 00:47:45,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:45,196 INFO L478 AbstractCegarLoop]: Abstraction has 485 states and 596 transitions. [2022-04-07 00:47:45,196 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), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-07 00:47:45,196 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 596 transitions. [2022-04-07 00:47:45,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-07 00:47:45,197 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:45,197 INFO L499 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] [2022-04-07 00:47:45,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-04-07 00:47:45,197 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:45,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:45,197 INFO L85 PathProgramCache]: Analyzing trace with hash -2107854790, now seen corresponding path program 1 times [2022-04-07 00:47:45,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:45,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1031567179] [2022-04-07 00:47:45,198 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:45,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2107854790, now seen corresponding path program 2 times [2022-04-07 00:47:45,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:45,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782012420] [2022-04-07 00:47:45,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:45,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:45,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:45,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:45,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:45,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:45,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-07 00:47:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:45,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:45,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782012420] [2022-04-07 00:47:45,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782012420] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:45,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:45,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:47:45,516 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:45,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1031567179] [2022-04-07 00:47:45,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1031567179] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:45,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:45,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:47:45,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843007289] [2022-04-07 00:47:45,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:45,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:47:45,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:45,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:47:45,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:47:45,518 INFO L87 Difference]: Start difference. First operand 485 states and 596 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:46,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:46,697 INFO L93 Difference]: Finished difference Result 512 states and 627 transitions. [2022-04-07 00:47:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:47:46,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (7), 7 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 64 [2022-04-07 00:47:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:46,699 INFO L225 Difference]: With dead ends: 512 [2022-04-07 00:47:46,699 INFO L226 Difference]: Without dead ends: 490 [2022-04-07 00:47:46,699 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:47:46,700 INFO L913 BasicCegarLoop]: 375 mSDtfsCounter, 411 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:46,700 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1433 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-07 00:47:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-04-07 00:47:46,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 474. [2022-04-07 00:47:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 372 states have (on average 1.2311827956989247) internal successors, (458), 379 states have internal predecessors, (458), 58 states have call successors, (58), 42 states have call predecessors, (58), 43 states have return successors, (65), 53 states have call predecessors, (65), 52 states have call successors, (65) [2022-04-07 00:47:46,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 581 transitions. [2022-04-07 00:47:46,783 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 581 transitions. Word has length 64 [2022-04-07 00:47:46,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:46,784 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 581 transitions. [2022-04-07 00:47:46,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:46,784 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 581 transitions. [2022-04-07 00:47:46,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-07 00:47:46,794 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:46,795 INFO L499 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] [2022-04-07 00:47:46,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-04-07 00:47:46,795 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:46,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:46,795 INFO L85 PathProgramCache]: Analyzing trace with hash 245569005, now seen corresponding path program 1 times [2022-04-07 00:47:46,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:46,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1314183970] [2022-04-07 00:47:46,796 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:46,796 INFO L85 PathProgramCache]: Analyzing trace with hash 245569005, now seen corresponding path program 2 times [2022-04-07 00:47:46,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:46,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206901050] [2022-04-07 00:47:46,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:46,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:46,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:46,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:46,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:46,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:47:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:46,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:47:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:47,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:47,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206901050] [2022-04-07 00:47:47,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206901050] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:47,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:47,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:47:47,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:47,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1314183970] [2022-04-07 00:47:47,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1314183970] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:47,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:47,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:47:47,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138051216] [2022-04-07 00:47:47,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:47,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:47:47,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:47,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:47:47,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:47:47,009 INFO L87 Difference]: Start difference. First operand 474 states and 581 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:48,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:48,956 INFO L93 Difference]: Finished difference Result 507 states and 619 transitions. [2022-04-07 00:47:48,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:47:48,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 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 64 [2022-04-07 00:47:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:48,958 INFO L225 Difference]: With dead ends: 507 [2022-04-07 00:47:48,958 INFO L226 Difference]: Without dead ends: 485 [2022-04-07 00:47:48,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:47:48,960 INFO L913 BasicCegarLoop]: 367 mSDtfsCounter, 455 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:48,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 1662 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-07 00:47:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-04-07 00:47:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 469. [2022-04-07 00:47:49,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 368 states have (on average 1.2309782608695652) internal successors, (453), 375 states have internal predecessors, (453), 57 states have call successors, (57), 42 states have call predecessors, (57), 43 states have return successors, (64), 52 states have call predecessors, (64), 51 states have call successors, (64) [2022-04-07 00:47:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 574 transitions. [2022-04-07 00:47:49,126 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 574 transitions. Word has length 64 [2022-04-07 00:47:49,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:49,126 INFO L478 AbstractCegarLoop]: Abstraction has 469 states and 574 transitions. [2022-04-07 00:47:49,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:49,126 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 574 transitions. [2022-04-07 00:47:49,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-07 00:47:49,127 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:49,127 INFO L499 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] [2022-04-07 00:47:49,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-04-07 00:47:49,127 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:49,127 INFO L85 PathProgramCache]: Analyzing trace with hash -684542465, now seen corresponding path program 1 times [2022-04-07 00:47:49,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:49,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1459688219] [2022-04-07 00:47:49,128 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:49,128 INFO L85 PathProgramCache]: Analyzing trace with hash -684542465, now seen corresponding path program 2 times [2022-04-07 00:47:49,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:49,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899135944] [2022-04-07 00:47:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:49,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:49,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:49,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:49,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:49,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:47:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:49,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:47:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:49,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:49,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899135944] [2022-04-07 00:47:49,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899135944] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:49,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:49,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:47:49,301 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:49,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1459688219] [2022-04-07 00:47:49,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1459688219] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:49,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:49,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:47:49,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423374697] [2022-04-07 00:47:49,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:49,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:47:49,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:49,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:47:49,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:47:49,302 INFO L87 Difference]: Start difference. First operand 469 states and 574 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:50,364 INFO L93 Difference]: Finished difference Result 502 states and 612 transitions. [2022-04-07 00:47:50,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:47:50,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 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 64 [2022-04-07 00:47:50,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:50,370 INFO L225 Difference]: With dead ends: 502 [2022-04-07 00:47:50,370 INFO L226 Difference]: Without dead ends: 481 [2022-04-07 00:47:50,370 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:47:50,377 INFO L913 BasicCegarLoop]: 347 mSDtfsCounter, 337 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 2138 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 2241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:50,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 1554 Invalid, 2241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2138 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:47:50,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-04-07 00:47:50,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 465. [2022-04-07 00:47:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 365 states have (on average 1.2301369863013698) internal successors, (449), 372 states have internal predecessors, (449), 56 states have call successors, (56), 42 states have call predecessors, (56), 43 states have return successors, (63), 51 states have call predecessors, (63), 50 states have call successors, (63) [2022-04-07 00:47:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 568 transitions. [2022-04-07 00:47:50,495 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 568 transitions. Word has length 64 [2022-04-07 00:47:50,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:50,496 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 568 transitions. [2022-04-07 00:47:50,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:50,496 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 568 transitions. [2022-04-07 00:47:50,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-07 00:47:50,497 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:50,497 INFO L499 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] [2022-04-07 00:47:50,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-04-07 00:47:50,497 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:50,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:50,497 INFO L85 PathProgramCache]: Analyzing trace with hash 387945384, now seen corresponding path program 1 times [2022-04-07 00:47:50,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:50,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [374774293] [2022-04-07 00:47:50,498 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:50,498 INFO L85 PathProgramCache]: Analyzing trace with hash 387945384, now seen corresponding path program 2 times [2022-04-07 00:47:50,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:50,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305010321] [2022-04-07 00:47:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:50,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:50,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:50,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:50,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:50,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-07 00:47:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:50,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:47:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:50,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:47:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:50,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:47:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:50,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:50,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305010321] [2022-04-07 00:47:50,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305010321] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:50,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:50,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:47:50,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:50,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [374774293] [2022-04-07 00:47:50,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [374774293] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:50,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:50,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:47:50,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198260662] [2022-04-07 00:47:50,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:50,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-07 00:47:50,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:50,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-07 00:47:50,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:47:50,642 INFO L87 Difference]: Start difference. First operand 465 states and 568 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:47:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:51,653 INFO L93 Difference]: Finished difference Result 878 states and 1082 transitions. [2022-04-07 00:47:51,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:47:51,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-04-07 00:47:51,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:51,655 INFO L225 Difference]: With dead ends: 878 [2022-04-07 00:47:51,656 INFO L226 Difference]: Without dead ends: 625 [2022-04-07 00:47:51,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:47:51,659 INFO L913 BasicCegarLoop]: 408 mSDtfsCounter, 724 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:51,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 884 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-07 00:47:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-04-07 00:47:51,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 586. [2022-04-07 00:47:51,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 458 states have (on average 1.220524017467249) internal successors, (559), 467 states have internal predecessors, (559), 69 states have call successors, (69), 52 states have call predecessors, (69), 58 states have return successors, (88), 67 states have call predecessors, (88), 64 states have call successors, (88) [2022-04-07 00:47:51,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 716 transitions. [2022-04-07 00:47:51,785 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 716 transitions. Word has length 73 [2022-04-07 00:47:51,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:51,788 INFO L478 AbstractCegarLoop]: Abstraction has 586 states and 716 transitions. [2022-04-07 00:47:51,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:47:51,788 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 716 transitions. [2022-04-07 00:47:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-07 00:47:51,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:51,789 INFO L499 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] [2022-04-07 00:47:51,789 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-04-07 00:47:51,789 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:51,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:51,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1771054254, now seen corresponding path program 1 times [2022-04-07 00:47:51,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:51,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1874080103] [2022-04-07 00:47:51,790 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:51,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1771054254, now seen corresponding path program 2 times [2022-04-07 00:47:51,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:51,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208103836] [2022-04-07 00:47:51,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:51,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:51,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:51,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:51,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:51,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:47:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:51,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-07 00:47:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:52,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:52,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208103836] [2022-04-07 00:47:52,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208103836] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:52,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:52,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:47:52,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:52,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1874080103] [2022-04-07 00:47:52,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1874080103] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:52,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:52,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:47:52,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932042532] [2022-04-07 00:47:52,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:52,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:47:52,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:52,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:47:52,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:47:52,017 INFO L87 Difference]: Start difference. First operand 586 states and 716 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:53,195 INFO L93 Difference]: Finished difference Result 619 states and 755 transitions. [2022-04-07 00:47:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:47:53,196 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (7), 7 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 68 [2022-04-07 00:47:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:53,198 INFO L225 Difference]: With dead ends: 619 [2022-04-07 00:47:53,198 INFO L226 Difference]: Without dead ends: 576 [2022-04-07 00:47:53,198 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:47:53,199 INFO L913 BasicCegarLoop]: 339 mSDtfsCounter, 559 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:53,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1423 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-07 00:47:53,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-04-07 00:47:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 560. [2022-04-07 00:47:53,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 437 states have (on average 1.2196796338672768) internal successors, (533), 446 states have internal predecessors, (533), 66 states have call successors, (66), 50 states have call predecessors, (66), 56 states have return successors, (85), 64 states have call predecessors, (85), 61 states have call successors, (85) [2022-04-07 00:47:53,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 684 transitions. [2022-04-07 00:47:53,301 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 684 transitions. Word has length 68 [2022-04-07 00:47:53,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:53,301 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 684 transitions. [2022-04-07 00:47:53,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:47:53,301 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 684 transitions. [2022-04-07 00:47:53,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-07 00:47:53,302 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:53,302 INFO L499 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] [2022-04-07 00:47:53,302 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-04-07 00:47:53,302 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:53,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:53,303 INFO L85 PathProgramCache]: Analyzing trace with hash -699513037, now seen corresponding path program 1 times [2022-04-07 00:47:53,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:53,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [387306696] [2022-04-07 00:47:53,327 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:53,327 INFO L85 PathProgramCache]: Analyzing trace with hash -699513037, now seen corresponding path program 2 times [2022-04-07 00:47:53,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:53,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782878856] [2022-04-07 00:47:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:53,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:53,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:53,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:53,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:53,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:47:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:53,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:47:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:53,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:47:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:53,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-07 00:47:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:53,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:53,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782878856] [2022-04-07 00:47:53,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782878856] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:53,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:53,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:47:53,616 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:53,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [387306696] [2022-04-07 00:47:53,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [387306696] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:53,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:53,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:47:53,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472464219] [2022-04-07 00:47:53,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:53,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:47:53,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:53,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:47:53,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:47:53,618 INFO L87 Difference]: Start difference. First operand 560 states and 684 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 7 states have internal predecessors, (55), 3 states have call successors, (9), 8 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:47:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:54,987 INFO L93 Difference]: Finished difference Result 589 states and 718 transitions. [2022-04-07 00:47:54,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-07 00:47:54,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 7 states have internal predecessors, (55), 3 states have call successors, (9), 8 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 71 [2022-04-07 00:47:54,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:54,989 INFO L225 Difference]: With dead ends: 589 [2022-04-07 00:47:54,989 INFO L226 Difference]: Without dead ends: 535 [2022-04-07 00:47:54,989 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:47:54,990 INFO L913 BasicCegarLoop]: 305 mSDtfsCounter, 382 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 2666 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:54,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 901 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2666 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:47:54,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-04-07 00:47:55,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 519. [2022-04-07 00:47:55,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 403 states have (on average 1.2133995037220844) internal successors, (489), 412 states have internal predecessors, (489), 62 states have call successors, (62), 47 states have call predecessors, (62), 53 states have return successors, (81), 60 states have call predecessors, (81), 57 states have call successors, (81) [2022-04-07 00:47:55,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 632 transitions. [2022-04-07 00:47:55,115 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 632 transitions. Word has length 71 [2022-04-07 00:47:55,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:55,116 INFO L478 AbstractCegarLoop]: Abstraction has 519 states and 632 transitions. [2022-04-07 00:47:55,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 7 states have internal predecessors, (55), 3 states have call successors, (9), 8 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:47:55,116 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 632 transitions. [2022-04-07 00:47:55,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-07 00:47:55,120 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:55,120 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:47:55,121 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-04-07 00:47:55,121 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:55,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:55,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1796970753, now seen corresponding path program 1 times [2022-04-07 00:47:55,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:55,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1670182972] [2022-04-07 00:47:55,122 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:55,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1796970753, now seen corresponding path program 2 times [2022-04-07 00:47:55,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:55,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487454126] [2022-04-07 00:47:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:55,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:55,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:55,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:55,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:55,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-07 00:47:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:55,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:47:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:55,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:47:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:55,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:47:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:55,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-07 00:47:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:55,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:55,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487454126] [2022-04-07 00:47:55,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487454126] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:55,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:55,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:47:55,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:55,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1670182972] [2022-04-07 00:47:55,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1670182972] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:55,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:55,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:47:55,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048699301] [2022-04-07 00:47:55,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:55,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-07 00:47:55,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:55,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-07 00:47:55,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-04-07 00:47:55,373 INFO L87 Difference]: Start difference. First operand 519 states and 632 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-07 00:47:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:56,407 INFO L93 Difference]: Finished difference Result 840 states and 1028 transitions. [2022-04-07 00:47:56,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-07 00:47:56,407 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2022-04-07 00:47:56,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:56,409 INFO L225 Difference]: With dead ends: 840 [2022-04-07 00:47:56,409 INFO L226 Difference]: Without dead ends: 523 [2022-04-07 00:47:56,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:47:56,436 INFO L913 BasicCegarLoop]: 388 mSDtfsCounter, 389 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:56,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 1142 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-07 00:47:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-04-07 00:47:56,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 501. [2022-04-07 00:47:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 389 states have (on average 1.2133676092544987) internal successors, (472), 397 states have internal predecessors, (472), 60 states have call successors, (60), 47 states have call predecessors, (60), 51 states have return successors, (70), 57 states have call predecessors, (70), 55 states have call successors, (70) [2022-04-07 00:47:56,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 602 transitions. [2022-04-07 00:47:56,818 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 602 transitions. Word has length 82 [2022-04-07 00:47:56,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:56,819 INFO L478 AbstractCegarLoop]: Abstraction has 501 states and 602 transitions. [2022-04-07 00:47:56,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-07 00:47:56,819 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 602 transitions. [2022-04-07 00:47:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-07 00:47:56,819 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:56,820 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:47:56,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-04-07 00:47:56,822 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:56,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:56,822 INFO L85 PathProgramCache]: Analyzing trace with hash -2026941125, now seen corresponding path program 1 times [2022-04-07 00:47:56,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:56,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1387854030] [2022-04-07 00:47:56,823 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:56,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2026941125, now seen corresponding path program 2 times [2022-04-07 00:47:56,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:56,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105240808] [2022-04-07 00:47:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:56,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:56,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:57,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:57,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:57,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-07 00:47:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:57,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:47:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:57,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:47:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:57,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:47:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:57,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-07 00:47:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:57,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:47:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:57,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:57,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105240808] [2022-04-07 00:47:57,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105240808] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:57,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:57,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:47:57,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:57,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1387854030] [2022-04-07 00:47:57,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1387854030] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:57,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:57,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:47:57,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882483007] [2022-04-07 00:47:57,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:57,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:47:57,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:57,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:47:57,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:47:57,156 INFO L87 Difference]: Start difference. First operand 501 states and 602 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-07 00:47:58,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:58,253 INFO L93 Difference]: Finished difference Result 839 states and 1046 transitions. [2022-04-07 00:47:58,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-07 00:47:58,254 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2022-04-07 00:47:58,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:58,256 INFO L225 Difference]: With dead ends: 839 [2022-04-07 00:47:58,256 INFO L226 Difference]: Without dead ends: 585 [2022-04-07 00:47:58,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-04-07 00:47:58,257 INFO L913 BasicCegarLoop]: 339 mSDtfsCounter, 526 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:58,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 1426 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:47:58,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-04-07 00:47:58,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 465. [2022-04-07 00:47:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 365 states have (on average 1.2136986301369863) internal successors, (443), 371 states have internal predecessors, (443), 53 states have call successors, (53), 41 states have call predecessors, (53), 46 states have return successors, (60), 53 states have call predecessors, (60), 49 states have call successors, (60) [2022-04-07 00:47:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 556 transitions. [2022-04-07 00:47:58,384 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 556 transitions. Word has length 83 [2022-04-07 00:47:58,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:58,385 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 556 transitions. [2022-04-07 00:47:58,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-07 00:47:58,385 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 556 transitions. [2022-04-07 00:47:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-07 00:47:58,385 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:58,386 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:47:58,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-04-07 00:47:58,386 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash -564339607, now seen corresponding path program 1 times [2022-04-07 00:47:58,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:58,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [672529929] [2022-04-07 00:47:58,386 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash -564339607, now seen corresponding path program 2 times [2022-04-07 00:47:58,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:58,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949731090] [2022-04-07 00:47:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:58,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:58,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:47:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:58,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:47:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:58,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:47:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:58,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:47:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:58,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:47:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:58,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:47:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:58,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:47:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:58,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:47:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:58,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-07 00:47:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:47:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:47:58,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:47:58,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949731090] [2022-04-07 00:47:58,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949731090] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:58,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:58,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:47:58,723 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:47:58,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [672529929] [2022-04-07 00:47:58,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [672529929] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:47:58,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:47:58,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:47:58,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741624899] [2022-04-07 00:47:58,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:47:58,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-07 00:47:58,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:58,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-07 00:47:58,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:47:58,725 INFO L87 Difference]: Start difference. First operand 465 states and 556 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-07 00:47:59,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:47:59,780 INFO L93 Difference]: Finished difference Result 526 states and 629 transitions. [2022-04-07 00:47:59,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-07 00:47:59,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (11), 9 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 88 [2022-04-07 00:47:59,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:47:59,801 INFO L225 Difference]: With dead ends: 526 [2022-04-07 00:47:59,801 INFO L226 Difference]: Without dead ends: 505 [2022-04-07 00:47:59,801 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-04-07 00:47:59,803 INFO L913 BasicCegarLoop]: 289 mSDtfsCounter, 359 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:47:59,803 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 1560 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-07 00:47:59,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-04-07 00:47:59,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 473. [2022-04-07 00:47:59,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 372 states have (on average 1.2096774193548387) internal successors, (450), 378 states have internal predecessors, (450), 53 states have call successors, (53), 41 states have call predecessors, (53), 47 states have return successors, (63), 54 states have call predecessors, (63), 49 states have call successors, (63) [2022-04-07 00:47:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 566 transitions. [2022-04-07 00:47:59,936 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 566 transitions. Word has length 88 [2022-04-07 00:47:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:47:59,936 INFO L478 AbstractCegarLoop]: Abstraction has 473 states and 566 transitions. [2022-04-07 00:47:59,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-07 00:47:59,937 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 566 transitions. [2022-04-07 00:47:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-07 00:47:59,939 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:47:59,939 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:47:59,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-04-07 00:47:59,940 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:47:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:47:59,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1551103562, now seen corresponding path program 1 times [2022-04-07 00:47:59,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:47:59,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [781423330] [2022-04-07 00:47:59,941 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:47:59,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1551103562, now seen corresponding path program 2 times [2022-04-07 00:47:59,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:47:59,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036926532] [2022-04-07 00:47:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:47:59,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:47:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:00,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:00,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:00,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:00,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:48:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:00,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:00,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:00,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:00,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:00,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-07 00:48:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:48:00,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:00,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036926532] [2022-04-07 00:48:00,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036926532] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:00,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:00,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:48:00,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:00,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [781423330] [2022-04-07 00:48:00,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [781423330] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:00,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:00,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:48:00,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915847703] [2022-04-07 00:48:00,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:00,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-07 00:48:00,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:00,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-07 00:48:00,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:48:00,269 INFO L87 Difference]: Start difference. First operand 473 states and 566 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-07 00:48:01,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:01,705 INFO L93 Difference]: Finished difference Result 526 states and 628 transitions. [2022-04-07 00:48:01,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-07 00:48:01,706 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (11), 9 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 89 [2022-04-07 00:48:01,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:01,707 INFO L225 Difference]: With dead ends: 526 [2022-04-07 00:48:01,707 INFO L226 Difference]: Without dead ends: 505 [2022-04-07 00:48:01,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:48:01,708 INFO L913 BasicCegarLoop]: 305 mSDtfsCounter, 409 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1705 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:01,708 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 1705 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-07 00:48:01,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-04-07 00:48:01,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 465. [2022-04-07 00:48:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 365 states have (on average 1.210958904109589) internal successors, (442), 371 states have internal predecessors, (442), 53 states have call successors, (53), 41 states have call predecessors, (53), 46 states have return successors, (60), 53 states have call predecessors, (60), 49 states have call successors, (60) [2022-04-07 00:48:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 555 transitions. [2022-04-07 00:48:01,795 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 555 transitions. Word has length 89 [2022-04-07 00:48:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:01,795 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 555 transitions. [2022-04-07 00:48:01,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-07 00:48:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 555 transitions. [2022-04-07 00:48:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-07 00:48:01,796 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:01,796 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:01,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-04-07 00:48:01,796 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:01,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:01,796 INFO L85 PathProgramCache]: Analyzing trace with hash 945867422, now seen corresponding path program 1 times [2022-04-07 00:48:01,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:01,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1231145099] [2022-04-07 00:48:01,797 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:01,797 INFO L85 PathProgramCache]: Analyzing trace with hash 945867422, now seen corresponding path program 2 times [2022-04-07 00:48:01,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:01,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993530252] [2022-04-07 00:48:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:01,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:01,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:01,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:01,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:01,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:48:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:01,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-07 00:48:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:01,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:48:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:01,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-07 00:48:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:01,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-07 00:48:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:48:01,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:01,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993530252] [2022-04-07 00:48:01,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993530252] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:01,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:01,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:48:01,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:01,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1231145099] [2022-04-07 00:48:01,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1231145099] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:01,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:01,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:48:01,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263132485] [2022-04-07 00:48:01,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:01,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:48:01,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:01,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:48:01,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:48:01,968 INFO L87 Difference]: Start difference. First operand 465 states and 555 transitions. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 5 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-07 00:48:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:03,369 INFO L93 Difference]: Finished difference Result 910 states and 1073 transitions. [2022-04-07 00:48:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-07 00:48:03,370 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 5 states have call successors, (10), 9 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 92 [2022-04-07 00:48:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:03,378 INFO L225 Difference]: With dead ends: 910 [2022-04-07 00:48:03,378 INFO L226 Difference]: Without dead ends: 611 [2022-04-07 00:48:03,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-04-07 00:48:03,380 INFO L913 BasicCegarLoop]: 318 mSDtfsCounter, 708 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:03,380 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 542 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:48:03,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-04-07 00:48:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 586. [2022-04-07 00:48:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 462 states have (on average 1.2034632034632036) internal successors, (556), 470 states have internal predecessors, (556), 61 states have call successors, (61), 53 states have call predecessors, (61), 62 states have return successors, (72), 63 states have call predecessors, (72), 57 states have call successors, (72) [2022-04-07 00:48:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 689 transitions. [2022-04-07 00:48:03,498 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 689 transitions. Word has length 92 [2022-04-07 00:48:03,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:03,498 INFO L478 AbstractCegarLoop]: Abstraction has 586 states and 689 transitions. [2022-04-07 00:48:03,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 5 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-07 00:48:03,499 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 689 transitions. [2022-04-07 00:48:03,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-07 00:48:03,499 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:03,500 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:03,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-04-07 00:48:03,500 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:03,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:03,500 INFO L85 PathProgramCache]: Analyzing trace with hash 680283571, now seen corresponding path program 1 times [2022-04-07 00:48:03,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:03,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [241101196] [2022-04-07 00:48:03,501 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:03,501 INFO L85 PathProgramCache]: Analyzing trace with hash 680283571, now seen corresponding path program 2 times [2022-04-07 00:48:03,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:03,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677501279] [2022-04-07 00:48:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:03,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:03,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:03,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:03,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:03,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:48:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:03,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-07 00:48:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:03,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:48:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:03,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-07 00:48:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:03,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-07 00:48:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:48:03,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:03,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677501279] [2022-04-07 00:48:03,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677501279] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:03,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:03,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:48:03,823 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:03,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [241101196] [2022-04-07 00:48:03,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [241101196] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:03,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:03,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:48:03,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968904491] [2022-04-07 00:48:03,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:03,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-07 00:48:03,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:03,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-07 00:48:03,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:48:03,824 INFO L87 Difference]: Start difference. First operand 586 states and 689 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 7 states have internal predecessors, (75), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-07 00:48:04,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:04,937 INFO L93 Difference]: Finished difference Result 590 states and 692 transitions. [2022-04-07 00:48:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-07 00:48:04,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 7 states have internal predecessors, (75), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 93 [2022-04-07 00:48:04,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:04,943 INFO L225 Difference]: With dead ends: 590 [2022-04-07 00:48:04,943 INFO L226 Difference]: Without dead ends: 498 [2022-04-07 00:48:04,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-04-07 00:48:04,945 INFO L913 BasicCegarLoop]: 245 mSDtfsCounter, 306 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 2287 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:04,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 644 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2287 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:48:04,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-04-07 00:48:05,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2022-04-07 00:48:05,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 387 states have (on average 1.20671834625323) internal successors, (467), 394 states have internal predecessors, (467), 54 states have call successors, (54), 47 states have call predecessors, (54), 54 states have return successors, (64), 55 states have call predecessors, (64), 51 states have call successors, (64) [2022-04-07 00:48:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 585 transitions. [2022-04-07 00:48:05,045 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 585 transitions. Word has length 93 [2022-04-07 00:48:05,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:05,045 INFO L478 AbstractCegarLoop]: Abstraction has 496 states and 585 transitions. [2022-04-07 00:48:05,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 7 states have internal predecessors, (75), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-07 00:48:05,046 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 585 transitions. [2022-04-07 00:48:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-07 00:48:05,046 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:05,046 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:05,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-04-07 00:48:05,052 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:05,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:05,053 INFO L85 PathProgramCache]: Analyzing trace with hash 313967105, now seen corresponding path program 1 times [2022-04-07 00:48:05,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:05,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [798119197] [2022-04-07 00:48:05,053 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:05,053 INFO L85 PathProgramCache]: Analyzing trace with hash 313967105, now seen corresponding path program 2 times [2022-04-07 00:48:05,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:05,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102543101] [2022-04-07 00:48:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:05,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:05,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:05,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:05,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:05,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:48:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:05,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:05,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:05,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:05,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:05,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-07 00:48:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:05,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-07 00:48:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:48:05,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:05,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102543101] [2022-04-07 00:48:05,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102543101] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:05,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:05,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:48:05,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:05,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [798119197] [2022-04-07 00:48:05,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [798119197] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:05,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:05,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:48:05,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883345000] [2022-04-07 00:48:05,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:05,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:48:05,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:05,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:48:05,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:48:05,340 INFO L87 Difference]: Start difference. First operand 496 states and 585 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 5 states have internal predecessors, (77), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-07 00:48:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:05,920 INFO L93 Difference]: Finished difference Result 531 states and 619 transitions. [2022-04-07 00:48:05,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:48:05,921 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 5 states have internal predecessors, (77), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2022-04-07 00:48:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:05,922 INFO L225 Difference]: With dead ends: 531 [2022-04-07 00:48:05,922 INFO L226 Difference]: Without dead ends: 492 [2022-04-07 00:48:05,923 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:48:05,923 INFO L913 BasicCegarLoop]: 198 mSDtfsCounter, 187 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:05,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 927 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-07 00:48:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-04-07 00:48:06,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 439. [2022-04-07 00:48:06,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 343 states have (on average 1.19533527696793) internal successors, (410), 349 states have internal predecessors, (410), 47 states have call successors, (47), 42 states have call predecessors, (47), 48 states have return successors, (55), 48 states have call predecessors, (55), 44 states have call successors, (55) [2022-04-07 00:48:06,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 512 transitions. [2022-04-07 00:48:06,017 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 512 transitions. Word has length 99 [2022-04-07 00:48:06,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:06,018 INFO L478 AbstractCegarLoop]: Abstraction has 439 states and 512 transitions. [2022-04-07 00:48:06,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 5 states have internal predecessors, (77), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-07 00:48:06,018 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 512 transitions. [2022-04-07 00:48:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-07 00:48:06,018 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:06,019 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:06,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-04-07 00:48:06,019 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:06,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1018925480, now seen corresponding path program 1 times [2022-04-07 00:48:06,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:06,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1749130438] [2022-04-07 00:48:06,021 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:06,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1018925480, now seen corresponding path program 2 times [2022-04-07 00:48:06,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:06,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431685428] [2022-04-07 00:48:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:06,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:06,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:06,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:06,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:06,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:48:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:06,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:06,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:06,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:06,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:06,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-07 00:48:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:06,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-07 00:48:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:48:06,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:06,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431685428] [2022-04-07 00:48:06,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431685428] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:06,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:06,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:48:06,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:06,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1749130438] [2022-04-07 00:48:06,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1749130438] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:06,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:06,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:48:06,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875899193] [2022-04-07 00:48:06,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:06,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:48:06,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:06,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:48:06,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:48:06,309 INFO L87 Difference]: Start difference. First operand 439 states and 512 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-07 00:48:07,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:07,618 INFO L93 Difference]: Finished difference Result 842 states and 986 transitions. [2022-04-07 00:48:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-07 00:48:07,618 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 99 [2022-04-07 00:48:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:07,652 INFO L225 Difference]: With dead ends: 842 [2022-04-07 00:48:07,653 INFO L226 Difference]: Without dead ends: 797 [2022-04-07 00:48:07,653 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-04-07 00:48:07,653 INFO L913 BasicCegarLoop]: 348 mSDtfsCounter, 579 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:07,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1612 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:48:07,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-04-07 00:48:07,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 419. [2022-04-07 00:48:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 327 states have (on average 1.1957186544342508) internal successors, (391), 332 states have internal predecessors, (391), 44 states have call successors, (44), 41 states have call predecessors, (44), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-04-07 00:48:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 487 transitions. [2022-04-07 00:48:07,838 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 487 transitions. Word has length 99 [2022-04-07 00:48:07,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:07,838 INFO L478 AbstractCegarLoop]: Abstraction has 419 states and 487 transitions. [2022-04-07 00:48:07,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-07 00:48:07,839 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 487 transitions. [2022-04-07 00:48:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-07 00:48:07,839 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:07,839 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:07,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-04-07 00:48:07,839 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:07,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1434876468, now seen corresponding path program 1 times [2022-04-07 00:48:07,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:07,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [909918802] [2022-04-07 00:48:07,840 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1434876468, now seen corresponding path program 2 times [2022-04-07 00:48:07,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:07,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386937340] [2022-04-07 00:48:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:07,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:07,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:07,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:08,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:08,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:48:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:08,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:48:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:08,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:48:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:08,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:08,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:08,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:08,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:48:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:08,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:08,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-07 00:48:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:48:08,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:08,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386937340] [2022-04-07 00:48:08,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386937340] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:08,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:08,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:48:08,159 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:08,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [909918802] [2022-04-07 00:48:08,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [909918802] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:08,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:08,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:48:08,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276596914] [2022-04-07 00:48:08,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:08,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-07 00:48:08,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:08,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-07 00:48:08,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:48:08,160 INFO L87 Difference]: Start difference. First operand 419 states and 487 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-04-07 00:48:09,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:09,544 INFO L93 Difference]: Finished difference Result 561 states and 656 transitions. [2022-04-07 00:48:09,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-07 00:48:09,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 104 [2022-04-07 00:48:09,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:09,546 INFO L225 Difference]: With dead ends: 561 [2022-04-07 00:48:09,546 INFO L226 Difference]: Without dead ends: 438 [2022-04-07 00:48:09,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-04-07 00:48:09,546 INFO L913 BasicCegarLoop]: 179 mSDtfsCounter, 134 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:09,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1142 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-07 00:48:09,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-04-07 00:48:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 428. [2022-04-07 00:48:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 335 states have (on average 1.182089552238806) internal successors, (396), 341 states have internal predecessors, (396), 45 states have call successors, (45), 41 states have call predecessors, (45), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-04-07 00:48:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 493 transitions. [2022-04-07 00:48:09,647 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 493 transitions. Word has length 104 [2022-04-07 00:48:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:09,647 INFO L478 AbstractCegarLoop]: Abstraction has 428 states and 493 transitions. [2022-04-07 00:48:09,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-04-07 00:48:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 493 transitions. [2022-04-07 00:48:09,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-07 00:48:09,648 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:09,648 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:09,649 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-04-07 00:48:09,649 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:09,649 INFO L85 PathProgramCache]: Analyzing trace with hash -679170353, now seen corresponding path program 1 times [2022-04-07 00:48:09,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:09,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1518644625] [2022-04-07 00:48:09,650 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:09,650 INFO L85 PathProgramCache]: Analyzing trace with hash -679170353, now seen corresponding path program 2 times [2022-04-07 00:48:09,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:09,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541288822] [2022-04-07 00:48:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:09,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:09,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:09,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:09,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:09,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-07 00:48:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:09,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:09,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:09,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:09,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-07 00:48:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:09,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:09,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:48:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:09,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:09,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:09,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-07 00:48:09,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:09,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541288822] [2022-04-07 00:48:09,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541288822] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:09,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:09,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:48:09,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:09,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1518644625] [2022-04-07 00:48:09,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1518644625] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:09,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:09,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:48:09,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279023649] [2022-04-07 00:48:09,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:09,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:48:09,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:09,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:48:09,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:48:09,933 INFO L87 Difference]: Start difference. First operand 428 states and 493 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-07 00:48:10,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:10,369 INFO L93 Difference]: Finished difference Result 749 states and 870 transitions. [2022-04-07 00:48:10,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:48:10,370 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 113 [2022-04-07 00:48:10,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:10,371 INFO L225 Difference]: With dead ends: 749 [2022-04-07 00:48:10,371 INFO L226 Difference]: Without dead ends: 440 [2022-04-07 00:48:10,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:48:10,372 INFO L913 BasicCegarLoop]: 176 mSDtfsCounter, 181 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:10,372 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 764 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-07 00:48:10,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-04-07 00:48:10,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 436. [2022-04-07 00:48:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 341 states have (on average 1.1788856304985338) internal successors, (402), 347 states have internal predecessors, (402), 45 states have call successors, (45), 41 states have call predecessors, (45), 49 states have return successors, (54), 47 states have call predecessors, (54), 41 states have call successors, (54) [2022-04-07 00:48:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 501 transitions. [2022-04-07 00:48:10,511 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 501 transitions. Word has length 113 [2022-04-07 00:48:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:10,511 INFO L478 AbstractCegarLoop]: Abstraction has 436 states and 501 transitions. [2022-04-07 00:48:10,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-07 00:48:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 501 transitions. [2022-04-07 00:48:10,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-07 00:48:10,512 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:10,512 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:10,512 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-04-07 00:48:10,512 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:10,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash 857265326, now seen corresponding path program 1 times [2022-04-07 00:48:10,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:10,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2114442568] [2022-04-07 00:48:10,513 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:10,513 INFO L85 PathProgramCache]: Analyzing trace with hash 857265326, now seen corresponding path program 2 times [2022-04-07 00:48:10,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:10,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048397697] [2022-04-07 00:48:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:10,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:10,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:10,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:10,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:10,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-07 00:48:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:10,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:10,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:10,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:10,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-07 00:48:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:10,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:10,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:48:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:10,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:10,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:10,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-07 00:48:10,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:10,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048397697] [2022-04-07 00:48:10,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048397697] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:10,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:10,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:48:10,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:10,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2114442568] [2022-04-07 00:48:10,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2114442568] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:10,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:10,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:48:10,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932652115] [2022-04-07 00:48:10,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:10,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:48:10,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:10,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:48:10,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:48:10,837 INFO L87 Difference]: Start difference. First operand 436 states and 501 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-04-07 00:48:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:11,460 INFO L93 Difference]: Finished difference Result 471 states and 535 transitions. [2022-04-07 00:48:11,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-07 00:48:11,461 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) Word has length 113 [2022-04-07 00:48:11,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:11,461 INFO L225 Difference]: With dead ends: 471 [2022-04-07 00:48:11,462 INFO L226 Difference]: Without dead ends: 387 [2022-04-07 00:48:11,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:48:11,469 INFO L913 BasicCegarLoop]: 181 mSDtfsCounter, 156 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:11,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 892 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-07 00:48:11,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-04-07 00:48:11,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 249. [2022-04-07 00:48:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 195 states have (on average 1.1384615384615384) internal successors, (222), 197 states have internal predecessors, (222), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-04-07 00:48:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 275 transitions. [2022-04-07 00:48:11,536 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 275 transitions. Word has length 113 [2022-04-07 00:48:11,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:11,537 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 275 transitions. [2022-04-07 00:48:11,537 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-04-07 00:48:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 275 transitions. [2022-04-07 00:48:11,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-04-07 00:48:11,537 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:11,537 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:11,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-04-07 00:48:11,538 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:11,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:11,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2021247887, now seen corresponding path program 1 times [2022-04-07 00:48:11,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:11,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [403192873] [2022-04-07 00:48:11,538 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:11,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2021247887, now seen corresponding path program 2 times [2022-04-07 00:48:11,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:11,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038976664] [2022-04-07 00:48:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:11,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:11,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:11,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:11,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:11,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:48:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:11,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:48:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:11,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:48:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:11,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:11,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:11,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:11,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:48:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:11,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:11,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-07 00:48:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:11,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-07 00:48:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:48:11,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:11,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038976664] [2022-04-07 00:48:11,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038976664] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:11,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:11,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:48:11,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:11,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [403192873] [2022-04-07 00:48:11,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [403192873] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:11,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:11,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:48:11,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216350429] [2022-04-07 00:48:11,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:11,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:48:11,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:11,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:48:11,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:48:11,798 INFO L87 Difference]: Start difference. First operand 249 states and 275 transitions. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-07 00:48:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:12,361 INFO L93 Difference]: Finished difference Result 293 states and 322 transitions. [2022-04-07 00:48:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:48:12,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2022-04-07 00:48:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:12,362 INFO L225 Difference]: With dead ends: 293 [2022-04-07 00:48:12,362 INFO L226 Difference]: Without dead ends: 263 [2022-04-07 00:48:12,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:48:12,362 INFO L913 BasicCegarLoop]: 175 mSDtfsCounter, 250 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:12,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 758 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-07 00:48:12,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-04-07 00:48:12,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 253. [2022-04-07 00:48:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 198 states have (on average 1.1363636363636365) internal successors, (225), 200 states have internal predecessors, (225), 26 states have call successors, (26), 26 states have call predecessors, (26), 28 states have return successors, (28), 26 states have call predecessors, (28), 24 states have call successors, (28) [2022-04-07 00:48:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 279 transitions. [2022-04-07 00:48:12,429 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 279 transitions. Word has length 120 [2022-04-07 00:48:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:12,429 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 279 transitions. [2022-04-07 00:48:12,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-07 00:48:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 279 transitions. [2022-04-07 00:48:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-04-07 00:48:12,430 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:12,430 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:12,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-04-07 00:48:12,430 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:12,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:12,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2092232912, now seen corresponding path program 1 times [2022-04-07 00:48:12,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:12,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1982385789] [2022-04-07 00:48:12,432 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:12,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2092232912, now seen corresponding path program 2 times [2022-04-07 00:48:12,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:12,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294716521] [2022-04-07 00:48:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:12,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:12,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:12,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:12,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:12,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:48:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:12,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:48:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:12,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:48:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:12,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:12,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:12,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:12,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:48:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:12,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:12,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-07 00:48:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:12,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-07 00:48:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:48:12,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:12,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294716521] [2022-04-07 00:48:12,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294716521] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:12,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:12,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:48:12,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:12,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1982385789] [2022-04-07 00:48:12,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1982385789] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:12,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:12,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:48:12,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830391246] [2022-04-07 00:48:12,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:12,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:48:12,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:12,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:48:12,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:48:12,681 INFO L87 Difference]: Start difference. First operand 253 states and 279 transitions. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-07 00:48:13,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:13,153 INFO L93 Difference]: Finished difference Result 339 states and 377 transitions. [2022-04-07 00:48:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:48:13,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2022-04-07 00:48:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:13,154 INFO L225 Difference]: With dead ends: 339 [2022-04-07 00:48:13,154 INFO L226 Difference]: Without dead ends: 254 [2022-04-07 00:48:13,154 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:48:13,154 INFO L913 BasicCegarLoop]: 174 mSDtfsCounter, 241 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:13,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 750 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-07 00:48:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-07 00:48:13,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2022-04-07 00:48:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 196 states have internal predecessors, (219), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-04-07 00:48:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 272 transitions. [2022-04-07 00:48:13,220 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 272 transitions. Word has length 120 [2022-04-07 00:48:13,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:13,221 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 272 transitions. [2022-04-07 00:48:13,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-07 00:48:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 272 transitions. [2022-04-07 00:48:13,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-04-07 00:48:13,221 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:13,222 INFO L499 BasicCegarLoop]: trace 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:13,222 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-04-07 00:48:13,222 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:13,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:13,222 INFO L85 PathProgramCache]: Analyzing trace with hash 90302461, now seen corresponding path program 1 times [2022-04-07 00:48:13,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:13,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1190058729] [2022-04-07 00:48:13,223 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:13,223 INFO L85 PathProgramCache]: Analyzing trace with hash 90302461, now seen corresponding path program 2 times [2022-04-07 00:48:13,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:13,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133680172] [2022-04-07 00:48:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:13,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:48:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:48:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:48:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:48:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:48:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-07 00:48:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-07 00:48:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-07 00:48:13,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:13,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133680172] [2022-04-07 00:48:13,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133680172] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:13,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:13,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-07 00:48:13,616 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:13,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1190058729] [2022-04-07 00:48:13,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1190058729] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:13,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:13,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-07 00:48:13,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041067713] [2022-04-07 00:48:13,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:13,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-07 00:48:13,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:13,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-07 00:48:13,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-04-07 00:48:13,617 INFO L87 Difference]: Start difference. First operand 248 states and 272 transitions. Second operand has 25 states, 25 states have (on average 4.04) internal successors, (101), 11 states have internal predecessors, (101), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-04-07 00:48:14,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:14,649 INFO L93 Difference]: Finished difference Result 320 states and 360 transitions. [2022-04-07 00:48:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-07 00:48:14,649 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 11 states have internal predecessors, (101), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) Word has length 150 [2022-04-07 00:48:14,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:14,650 INFO L225 Difference]: With dead ends: 320 [2022-04-07 00:48:14,650 INFO L226 Difference]: Without dead ends: 285 [2022-04-07 00:48:14,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-04-07 00:48:14,651 INFO L913 BasicCegarLoop]: 165 mSDtfsCounter, 194 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 1935 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:14,651 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1496 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1935 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:48:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-04-07 00:48:14,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 265. [2022-04-07 00:48:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 209 states have (on average 1.138755980861244) internal successors, (238), 211 states have internal predecessors, (238), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-04-07 00:48:14,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 293 transitions. [2022-04-07 00:48:14,746 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 293 transitions. Word has length 150 [2022-04-07 00:48:14,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:14,746 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 293 transitions. [2022-04-07 00:48:14,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 11 states have internal predecessors, (101), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-04-07 00:48:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 293 transitions. [2022-04-07 00:48:14,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-07 00:48:14,747 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:14,747 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:14,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-04-07 00:48:14,747 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1191115682, now seen corresponding path program 1 times [2022-04-07 00:48:14,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:14,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1667932204] [2022-04-07 00:48:14,748 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:14,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1191115682, now seen corresponding path program 2 times [2022-04-07 00:48:14,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:14,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275286988] [2022-04-07 00:48:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:14,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:14,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:14,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:14,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:14,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:48:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:14,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:48:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:14,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:48:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:14,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:14,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:14,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:14,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:48:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:14,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:14,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:48:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-07 00:48:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-07 00:48:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-07 00:48:15,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:15,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275286988] [2022-04-07 00:48:15,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275286988] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:15,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:15,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:48:15,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:15,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1667932204] [2022-04-07 00:48:15,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1667932204] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:15,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:15,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:48:15,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124558223] [2022-04-07 00:48:15,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:15,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-07 00:48:15,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-07 00:48:15,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:48:15,023 INFO L87 Difference]: Start difference. First operand 265 states and 293 transitions. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (16), 12 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-04-07 00:48:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:15,568 INFO L93 Difference]: Finished difference Result 360 states and 402 transitions. [2022-04-07 00:48:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-07 00:48:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (16), 12 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 151 [2022-04-07 00:48:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:15,570 INFO L225 Difference]: With dead ends: 360 [2022-04-07 00:48:15,570 INFO L226 Difference]: Without dead ends: 279 [2022-04-07 00:48:15,570 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-04-07 00:48:15,570 INFO L913 BasicCegarLoop]: 184 mSDtfsCounter, 244 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:15,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 1116 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-07 00:48:15,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-04-07 00:48:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 265. [2022-04-07 00:48:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 209 states have (on average 1.1339712918660287) internal successors, (237), 211 states have internal predecessors, (237), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-04-07 00:48:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 292 transitions. [2022-04-07 00:48:15,642 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 292 transitions. Word has length 151 [2022-04-07 00:48:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:15,642 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 292 transitions. [2022-04-07 00:48:15,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (16), 12 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-04-07 00:48:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 292 transitions. [2022-04-07 00:48:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-07 00:48:15,643 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:15,643 INFO L499 BasicCegarLoop]: trace 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:15,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-04-07 00:48:15,643 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:15,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1843438784, now seen corresponding path program 1 times [2022-04-07 00:48:15,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:15,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [760060910] [2022-04-07 00:48:15,644 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1843438784, now seen corresponding path program 2 times [2022-04-07 00:48:15,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:15,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392816527] [2022-04-07 00:48:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:15,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:48:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:48:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:48:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:48:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:48:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-07 00:48:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-07 00:48:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-07 00:48:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-07 00:48:15,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:15,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392816527] [2022-04-07 00:48:15,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392816527] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:15,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:15,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-07 00:48:15,971 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:15,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [760060910] [2022-04-07 00:48:15,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [760060910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:15,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:15,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-07 00:48:15,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314602494] [2022-04-07 00:48:15,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:15,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-07 00:48:15,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:15,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-07 00:48:15,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:48:15,972 INFO L87 Difference]: Start difference. First operand 265 states and 292 transitions. Second operand has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 8 states have internal predecessors, (96), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-07 00:48:16,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:16,709 INFO L93 Difference]: Finished difference Result 306 states and 340 transitions. [2022-04-07 00:48:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-07 00:48:16,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 8 states have internal predecessors, (96), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) Word has length 153 [2022-04-07 00:48:16,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:16,710 INFO L225 Difference]: With dead ends: 306 [2022-04-07 00:48:16,710 INFO L226 Difference]: Without dead ends: 265 [2022-04-07 00:48:16,711 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-04-07 00:48:16,711 INFO L913 BasicCegarLoop]: 165 mSDtfsCounter, 194 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:16,711 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 1120 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-07 00:48:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-04-07 00:48:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 259. [2022-04-07 00:48:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 205 states have (on average 1.1219512195121952) internal successors, (230), 207 states have internal predecessors, (230), 25 states have call successors, (25), 25 states have call predecessors, (25), 28 states have return successors, (28), 26 states have call predecessors, (28), 23 states have call successors, (28) [2022-04-07 00:48:16,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 283 transitions. [2022-04-07 00:48:16,780 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 283 transitions. Word has length 153 [2022-04-07 00:48:16,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:16,780 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 283 transitions. [2022-04-07 00:48:16,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 8 states have internal predecessors, (96), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-07 00:48:16,780 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 283 transitions. [2022-04-07 00:48:16,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-04-07 00:48:16,781 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:16,781 INFO L499 BasicCegarLoop]: trace 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:16,781 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-04-07 00:48:16,781 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:16,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:16,782 INFO L85 PathProgramCache]: Analyzing trace with hash -2010865059, now seen corresponding path program 1 times [2022-04-07 00:48:16,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:16,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1018939652] [2022-04-07 00:48:16,782 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:16,782 INFO L85 PathProgramCache]: Analyzing trace with hash -2010865059, now seen corresponding path program 2 times [2022-04-07 00:48:16,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:16,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732829721] [2022-04-07 00:48:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:16,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:16,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:16,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:16,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:16,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:48:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:48:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:48:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:48:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:48:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-07 00:48:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-07 00:48:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-07 00:48:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-07 00:48:17,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:17,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732829721] [2022-04-07 00:48:17,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732829721] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:17,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:17,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:48:17,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:17,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1018939652] [2022-04-07 00:48:17,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1018939652] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:17,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:17,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:48:17,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957907717] [2022-04-07 00:48:17,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:17,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:48:17,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:17,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:48:17,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:48:17,135 INFO L87 Difference]: Start difference. First operand 259 states and 283 transitions. Second operand has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-04-07 00:48:17,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:17,664 INFO L93 Difference]: Finished difference Result 320 states and 349 transitions. [2022-04-07 00:48:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:48:17,664 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 158 [2022-04-07 00:48:17,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:17,665 INFO L225 Difference]: With dead ends: 320 [2022-04-07 00:48:17,665 INFO L226 Difference]: Without dead ends: 245 [2022-04-07 00:48:17,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-04-07 00:48:17,668 INFO L913 BasicCegarLoop]: 144 mSDtfsCounter, 349 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:17,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 498 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-07 00:48:17,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-04-07 00:48:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 231. [2022-04-07 00:48:17,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 181 states have (on average 1.1049723756906078) internal successors, (200), 183 states have internal predecessors, (200), 24 states have call successors, (24), 24 states have call predecessors, (24), 25 states have return successors, (25), 23 states have call predecessors, (25), 22 states have call successors, (25) [2022-04-07 00:48:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 249 transitions. [2022-04-07 00:48:17,749 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 249 transitions. Word has length 158 [2022-04-07 00:48:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:17,749 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 249 transitions. [2022-04-07 00:48:17,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-04-07 00:48:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 249 transitions. [2022-04-07 00:48:17,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-04-07 00:48:17,750 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:17,750 INFO L499 BasicCegarLoop]: trace 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:17,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-04-07 00:48:17,750 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:17,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:17,750 INFO L85 PathProgramCache]: Analyzing trace with hash 473656636, now seen corresponding path program 1 times [2022-04-07 00:48:17,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:17,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1974040584] [2022-04-07 00:48:17,772 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:17,772 INFO L85 PathProgramCache]: Analyzing trace with hash 473656636, now seen corresponding path program 2 times [2022-04-07 00:48:17,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:17,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069465794] [2022-04-07 00:48:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:17,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:48:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:17,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:48:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:48:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:48:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:48:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-07 00:48:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-07 00:48:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-07 00:48:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-07 00:48:18,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:18,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069465794] [2022-04-07 00:48:18,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069465794] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:18,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:18,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-07 00:48:18,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:18,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1974040584] [2022-04-07 00:48:18,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1974040584] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:18,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:18,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-07 00:48:18,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188673037] [2022-04-07 00:48:18,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:18,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-07 00:48:18,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:18,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-07 00:48:18,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-04-07 00:48:18,129 INFO L87 Difference]: Start difference. First operand 231 states and 249 transitions. Second operand has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-07 00:48:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:18,535 INFO L93 Difference]: Finished difference Result 296 states and 320 transitions. [2022-04-07 00:48:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:48:18,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 160 [2022-04-07 00:48:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:18,537 INFO L225 Difference]: With dead ends: 296 [2022-04-07 00:48:18,537 INFO L226 Difference]: Without dead ends: 210 [2022-04-07 00:48:18,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-04-07 00:48:18,539 INFO L913 BasicCegarLoop]: 147 mSDtfsCounter, 150 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:18,545 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 683 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-07 00:48:18,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-07 00:48:18,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-04-07 00:48:18,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 163 states have (on average 1.0920245398773005) internal successors, (178), 164 states have internal predecessors, (178), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-04-07 00:48:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 224 transitions. [2022-04-07 00:48:18,607 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 224 transitions. Word has length 160 [2022-04-07 00:48:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:18,608 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 224 transitions. [2022-04-07 00:48:18,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-07 00:48:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 224 transitions. [2022-04-07 00:48:18,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-07 00:48:18,608 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:18,609 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:18,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-04-07 00:48:18,609 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:18,609 INFO L85 PathProgramCache]: Analyzing trace with hash -155521920, now seen corresponding path program 1 times [2022-04-07 00:48:18,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:18,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [586442164] [2022-04-07 00:48:18,609 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:18,610 INFO L85 PathProgramCache]: Analyzing trace with hash -155521920, now seen corresponding path program 2 times [2022-04-07 00:48:18,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:18,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055916681] [2022-04-07 00:48:18,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:18,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:48:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:48:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:48:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:48:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:48:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-07 00:48:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-07 00:48:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-07 00:48:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-07 00:48:18,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:18,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055916681] [2022-04-07 00:48:18,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055916681] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:18,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:18,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-07 00:48:18,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:18,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [586442164] [2022-04-07 00:48:18,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [586442164] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:18,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:18,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-07 00:48:18,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158030553] [2022-04-07 00:48:18,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:18,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-07 00:48:18,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:18,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-07 00:48:18,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:48:18,985 INFO L87 Difference]: Start difference. First operand 210 states and 224 transitions. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 8 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-07 00:48:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:20,042 INFO L93 Difference]: Finished difference Result 414 states and 443 transitions. [2022-04-07 00:48:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-07 00:48:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 8 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 161 [2022-04-07 00:48:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:20,043 INFO L225 Difference]: With dead ends: 414 [2022-04-07 00:48:20,043 INFO L226 Difference]: Without dead ends: 213 [2022-04-07 00:48:20,044 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=387, Invalid=1965, Unknown=0, NotChecked=0, Total=2352 [2022-04-07 00:48:20,044 INFO L913 BasicCegarLoop]: 137 mSDtfsCounter, 487 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:20,044 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 640 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-07 00:48:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-04-07 00:48:20,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2022-04-07 00:48:20,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 163 states have (on average 1.0858895705521472) internal successors, (177), 164 states have internal predecessors, (177), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-04-07 00:48:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 223 transitions. [2022-04-07 00:48:20,101 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 223 transitions. Word has length 161 [2022-04-07 00:48:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:20,101 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 223 transitions. [2022-04-07 00:48:20,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 8 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-07 00:48:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 223 transitions. [2022-04-07 00:48:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-07 00:48:20,103 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:48:20,103 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:48:20,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-04-07 00:48:20,104 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:48:20,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:48:20,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1078689346, now seen corresponding path program 1 times [2022-04-07 00:48:20,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:20,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [644345048] [2022-04-07 00:48:20,104 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:48:20,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1078689346, now seen corresponding path program 2 times [2022-04-07 00:48:20,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:48:20,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868201271] [2022-04-07 00:48:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:48:20,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:48:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:48:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:48:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:48:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-07 00:48:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:48:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:48:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:48:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:48:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:48:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:48:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:48:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-07 00:48:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-07 00:48:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-07 00:48:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:48:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-07 00:48:20,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:48:20,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868201271] [2022-04-07 00:48:20,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868201271] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:20,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:20,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-07 00:48:20,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:48:20,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [644345048] [2022-04-07 00:48:20,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [644345048] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:48:20,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:48:20,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-07 00:48:20,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263931369] [2022-04-07 00:48:20,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:48:20,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-07 00:48:20,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:48:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-07 00:48:20,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-04-07 00:48:20,667 INFO L87 Difference]: Start difference. First operand 210 states and 223 transitions. Second operand has 25 states, 25 states have (on average 4.28) internal successors, (107), 11 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-07 00:48:21,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:48:21,654 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2022-04-07 00:48:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-07 00:48:21,655 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.28) internal successors, (107), 11 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) Word has length 161 [2022-04-07 00:48:21,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:48:21,655 INFO L225 Difference]: With dead ends: 213 [2022-04-07 00:48:21,655 INFO L226 Difference]: Without dead ends: 0 [2022-04-07 00:48:21,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-04-07 00:48:21,656 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 441 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:48:21,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 706 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:48:21,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-07 00:48:21,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-07 00:48:21,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-07 00:48:21,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-07 00:48:21,657 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 161 [2022-04-07 00:48:21,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:48:21,657 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-07 00:48:21,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.28) internal successors, (107), 11 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-07 00:48:21,657 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-07 00:48:21,657 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-07 00:48:21,659 INFO L788 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-07 00:48:21,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-04-07 00:48:21,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.