/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/diskperf_simpl1.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 18:48:32,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 18:48:32,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 18:48:32,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 18:48:32,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 18:48:32,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 18:48:32,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 18:48:32,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 18:48:32,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 18:48:32,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 18:48:32,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 18:48:32,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 18:48:32,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 18:48:32,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 18:48:32,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 18:48:32,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 18:48:32,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 18:48:32,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 18:48:32,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 18:48:32,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 18:48:32,888 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 18:48:32,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 18:48:32,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 18:48:32,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 18:48:32,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 18:48:32,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 18:48:32,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 18:48:32,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 18:48:32,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 18:48:32,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 18:48:32,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-04-06 18:48:32,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 18:48:32,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 18:48:32,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 18:48:32,907 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 18:48:32,918 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 18:48:32,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 18:48:32,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 18:48:32,920 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 18:48:32,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 18:48:32,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 18:48:32,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 18:48:32,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 18:48:32,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 18:48:32,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 18:48:32,921 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 18:48:32,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 18:48:32,922 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 18:48:32,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 18:48:32,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 18:48:32,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 18:48:32,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 18:48:32,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 18:48:32,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:48:32,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 18:48:32,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 18:48:32,923 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 18:48:32,923 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 18:48:32,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 18:48:32,923 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 18:48:32,923 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 18:48:33,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 18:48:33,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 18:48:33,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 18:48:33,161 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 18:48:33,165 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 18:48:33,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/diskperf_simpl1.cil.c [2022-04-06 18:48:33,230 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/373fa540a/72596761a16841a6b589dd41b7bb0365/FLAG0358e3cb8 [2022-04-06 18:48:33,630 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 18:48:33,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/diskperf_simpl1.cil.c [2022-04-06 18:48:33,641 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/373fa540a/72596761a16841a6b589dd41b7bb0365/FLAG0358e3cb8 [2022-04-06 18:48:34,007 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/373fa540a/72596761a16841a6b589dd41b7bb0365 [2022-04-06 18:48:34,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 18:48:34,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 18:48:34,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 18:48:34,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 18:48:34,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 18:48:34,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:48:34" (1/1) ... [2022-04-06 18:48:34,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b617ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:34, skipping insertion in model container [2022-04-06 18:48:34,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:48:34" (1/1) ... [2022-04-06 18:48:34,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 18:48:34,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 18:48:34,227 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/diskperf_simpl1.cil.c[2072,2085] [2022-04-06 18:48:34,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:48:34,368 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 18:48:34,399 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/diskperf_simpl1.cil.c[2072,2085] [2022-04-06 18:48:34,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:48:34,462 INFO L208 MainTranslator]: Completed translation [2022-04-06 18:48:34,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:34 WrapperNode [2022-04-06 18:48:34,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 18:48:34,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 18:48:34,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 18:48:34,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 18:48:34,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:34" (1/1) ... [2022-04-06 18:48:34,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:34" (1/1) ... [2022-04-06 18:48:34,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:34" (1/1) ... [2022-04-06 18:48:34,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:34" (1/1) ... [2022-04-06 18:48:34,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:34" (1/1) ... [2022-04-06 18:48:34,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:34" (1/1) ... [2022-04-06 18:48:34,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:34" (1/1) ... [2022-04-06 18:48:34,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 18:48:34,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 18:48:34,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 18:48:34,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 18:48:34,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:34" (1/1) ... [2022-04-06 18:48:34,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:48:34,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:48:34,576 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) [2022-04-06 18:48:34,580 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 [2022-04-06 18:48:34,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 18:48:34,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 18:48:34,606 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 18:48:34,606 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-04-06 18:48:34,606 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-04-06 18:48:34,606 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfSyncFilterWithTarget [2022-04-06 18:48:34,606 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfDispatchPnp [2022-04-06 18:48:34,606 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIrpCompletion [2022-04-06 18:48:34,606 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfStartDevice [2022-04-06 18:48:34,607 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfRemoveDevice [2022-04-06 18:48:34,607 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfSendToNextDriver [2022-04-06 18:48:34,607 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfDispatchPower [2022-04-06 18:48:34,607 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfForwardIrpSynchronous [2022-04-06 18:48:34,607 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfCreate [2022-04-06 18:48:34,607 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIoCompletion [2022-04-06 18:48:34,607 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfDeviceControl [2022-04-06 18:48:34,607 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfShutdownFlush [2022-04-06 18:48:34,607 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfUnload [2022-04-06 18:48:34,608 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfRegisterDevice [2022-04-06 18:48:34,608 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-04-06 18:48:34,608 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 18:48:34,608 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-04-06 18:48:34,608 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-04-06 18:48:34,608 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-04-06 18:48:34,608 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-04-06 18:48:34,608 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-04-06 18:48:34,608 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-04-06 18:48:34,609 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-04-06 18:48:34,609 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 18:48:34,609 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 18:48:34,609 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 18:48:34,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 18:48:34,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-04-06 18:48:34,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 18:48:34,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-04-06 18:48:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfDispatchPnp [2022-04-06 18:48:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIrpCompletion [2022-04-06 18:48:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfStartDevice [2022-04-06 18:48:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfRemoveDevice [2022-04-06 18:48:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfSendToNextDriver [2022-04-06 18:48:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfDispatchPower [2022-04-06 18:48:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfForwardIrpSynchronous [2022-04-06 18:48:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfCreate [2022-04-06 18:48:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIoCompletion [2022-04-06 18:48:34,611 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfDeviceControl [2022-04-06 18:48:34,611 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfShutdownFlush [2022-04-06 18:48:34,611 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfRegisterDevice [2022-04-06 18:48:34,611 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-04-06 18:48:34,611 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-04-06 18:48:34,611 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-04-06 18:48:34,611 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-04-06 18:48:34,611 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-04-06 18:48:34,611 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-04-06 18:48:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-04-06 18:48:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-04-06 18:48:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfSyncFilterWithTarget [2022-04-06 18:48:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfUnload [2022-04-06 18:48:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-04-06 18:48:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 18:48:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-04-06 18:48:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 18:48:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 18:48:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 18:48:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 18:48:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 18:48:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 18:48:34,753 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 18:48:34,755 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 18:48:34,806 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:48:34,931 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2022-04-06 18:48:34,931 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2022-04-06 18:48:34,940 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:48:34,979 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2022-04-06 18:48:34,979 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2022-04-06 18:48:34,998 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:48:35,013 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-04-06 18:48:35,014 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-04-06 18:48:35,018 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:48:35,028 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 18:48:35,028 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 18:48:35,222 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:48:35,254 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-04-06 18:48:35,254 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-04-06 18:48:35,288 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:48:35,299 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-04-06 18:48:35,300 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-04-06 18:48:35,342 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 18:48:35,355 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 18:48:35,355 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 18:48:35,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:48:35 BoogieIcfgContainer [2022-04-06 18:48:35,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 18:48:35,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 18:48:35,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 18:48:35,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 18:48:35,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:48:34" (1/3) ... [2022-04-06 18:48:35,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193a8940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:48:35, skipping insertion in model container [2022-04-06 18:48:35,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:34" (2/3) ... [2022-04-06 18:48:35,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193a8940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:48:35, skipping insertion in model container [2022-04-06 18:48:35,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:48:35" (3/3) ... [2022-04-06 18:48:35,366 INFO L111 eAbstractionObserver]: Analyzing ICFG diskperf_simpl1.cil.c [2022-04-06 18:48:35,370 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 18:48:35,370 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 18:48:35,406 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 18:48:35,412 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 [2022-04-06 18:48:35,413 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 18:48:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 295 states, 206 states have (on average 1.4271844660194175) internal successors, (294), 224 states have internal predecessors, (294), 61 states have call successors, (61), 26 states have call predecessors, (61), 26 states have return successors, (61), 57 states have call predecessors, (61), 61 states have call successors, (61) [2022-04-06 18:48:35,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 18:48:35,440 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:35,440 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] [2022-04-06 18:48:35,441 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:35,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:35,459 INFO L85 PathProgramCache]: Analyzing trace with hash 717651403, now seen corresponding path program 1 times [2022-04-06 18:48:35,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:35,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [633830697] [2022-04-06 18:48:35,480 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:35,480 INFO L85 PathProgramCache]: Analyzing trace with hash 717651403, now seen corresponding path program 2 times [2022-04-06 18:48:35,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:35,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822807968] [2022-04-06 18:48:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:35,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:35,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:35,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:35,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:35,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822807968] [2022-04-06 18:48:35,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822807968] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:35,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:35,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:48:35,901 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:35,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [633830697] [2022-04-06 18:48:35,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [633830697] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:35,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:35,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:48:35,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425637866] [2022-04-06 18:48:35,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:35,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 18:48:35,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:35,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 18:48:35,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 18:48:35,952 INFO L87 Difference]: Start difference. First operand has 295 states, 206 states have (on average 1.4271844660194175) internal successors, (294), 224 states have internal predecessors, (294), 61 states have call successors, (61), 26 states have call predecessors, (61), 26 states have return successors, (61), 57 states have call predecessors, (61), 61 states have call successors, (61) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 18:48:36,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:36,949 INFO L93 Difference]: Finished difference Result 576 states and 845 transitions. [2022-04-06 18:48:36,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:48:36,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-04-06 18:48:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:36,970 INFO L225 Difference]: With dead ends: 576 [2022-04-06 18:48:36,970 INFO L226 Difference]: Without dead ends: 326 [2022-04-06 18:48:36,978 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:48:36,980 INFO L913 BasicCegarLoop]: 355 mSDtfsCounter, 234 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:36,981 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 597 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:48:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-04-06 18:48:37,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 287. [2022-04-06 18:48:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 201 states have (on average 1.373134328358209) internal successors, (276), 217 states have internal predecessors, (276), 61 states have call successors, (61), 26 states have call predecessors, (61), 24 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-04-06 18:48:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 383 transitions. [2022-04-06 18:48:37,074 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 383 transitions. Word has length 20 [2022-04-06 18:48:37,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:37,074 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 383 transitions. [2022-04-06 18:48:37,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 18:48:37,075 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 383 transitions. [2022-04-06 18:48:37,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 18:48:37,076 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:37,076 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] [2022-04-06 18:48:37,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 18:48:37,076 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:37,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:37,077 INFO L85 PathProgramCache]: Analyzing trace with hash -524387518, now seen corresponding path program 1 times [2022-04-06 18:48:37,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:37,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [708463622] [2022-04-06 18:48:37,078 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:37,078 INFO L85 PathProgramCache]: Analyzing trace with hash -524387518, now seen corresponding path program 2 times [2022-04-06 18:48:37,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:37,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538475143] [2022-04-06 18:48:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:37,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:37,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:37,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538475143] [2022-04-06 18:48:37,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538475143] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:37,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:37,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:37,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:37,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [708463622] [2022-04-06 18:48:37,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [708463622] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:37,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:37,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:37,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618041949] [2022-04-06 18:48:37,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:37,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:48:37,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:37,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:48:37,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:48:37,267 INFO L87 Difference]: Start difference. First operand 287 states and 383 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) [2022-04-06 18:48:38,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:38,214 INFO L93 Difference]: Finished difference Result 690 states and 962 transitions. [2022-04-06 18:48:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:48:38,215 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 [2022-04-06 18:48:38,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:38,223 INFO L225 Difference]: With dead ends: 690 [2022-04-06 18:48:38,223 INFO L226 Difference]: Without dead ends: 507 [2022-04-06 18:48:38,225 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 [2022-04-06 18:48:38,227 INFO L913 BasicCegarLoop]: 490 mSDtfsCounter, 573 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:38,227 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 682 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:48:38,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-04-06 18:48:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 440. [2022-04-06 18:48:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 318 states have (on average 1.3459119496855345) internal successors, (428), 329 states have internal predecessors, (428), 80 states have call successors, (80), 37 states have call predecessors, (80), 41 states have return successors, (100), 77 states have call predecessors, (100), 68 states have call successors, (100) [2022-04-06 18:48:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 608 transitions. [2022-04-06 18:48:38,332 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 608 transitions. Word has length 25 [2022-04-06 18:48:38,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:38,333 INFO L478 AbstractCegarLoop]: Abstraction has 440 states and 608 transitions. [2022-04-06 18:48:38,333 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) [2022-04-06 18:48:38,333 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 608 transitions. [2022-04-06 18:48:38,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 18:48:38,334 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:38,334 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] [2022-04-06 18:48:38,334 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 18:48:38,335 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:38,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:38,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1283608137, now seen corresponding path program 1 times [2022-04-06 18:48:38,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:38,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [850392250] [2022-04-06 18:48:38,336 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:38,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1283608137, now seen corresponding path program 2 times [2022-04-06 18:48:38,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:38,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39375451] [2022-04-06 18:48:38,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:38,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:38,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:38,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:38,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:38,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:38,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39375451] [2022-04-06 18:48:38,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39375451] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:38,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:38,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:38,541 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:38,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [850392250] [2022-04-06 18:48:38,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [850392250] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:38,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:38,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:38,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764037112] [2022-04-06 18:48:38,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:38,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:48:38,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:38,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:48:38,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:48:38,544 INFO L87 Difference]: Start difference. First operand 440 states and 608 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 18:48:39,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:39,297 INFO L93 Difference]: Finished difference Result 1013 states and 1458 transitions. [2022-04-06 18:48:39,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:48:39,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-04-06 18:48:39,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:39,303 INFO L225 Difference]: With dead ends: 1013 [2022-04-06 18:48:39,303 INFO L226 Difference]: Without dead ends: 690 [2022-04-06 18:48:39,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:48:39,306 INFO L913 BasicCegarLoop]: 402 mSDtfsCounter, 504 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:39,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 586 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 18:48:39,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-04-06 18:48:39,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 618. [2022-04-06 18:48:39,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 455 states have (on average 1.3560439560439561) internal successors, (617), 466 states have internal predecessors, (617), 109 states have call successors, (109), 49 states have call predecessors, (109), 53 states have return successors, (162), 105 states have call predecessors, (162), 98 states have call successors, (162) [2022-04-06 18:48:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 888 transitions. [2022-04-06 18:48:39,391 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 888 transitions. Word has length 31 [2022-04-06 18:48:39,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:39,392 INFO L478 AbstractCegarLoop]: Abstraction has 618 states and 888 transitions. [2022-04-06 18:48:39,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 18:48:39,392 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 888 transitions. [2022-04-06 18:48:39,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 18:48:39,394 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:39,394 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] [2022-04-06 18:48:39,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 18:48:39,394 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:39,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1553760270, now seen corresponding path program 1 times [2022-04-06 18:48:39,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:39,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1009686899] [2022-04-06 18:48:39,395 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1553760270, now seen corresponding path program 2 times [2022-04-06 18:48:39,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:39,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312990989] [2022-04-06 18:48:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:39,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:39,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:39,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:39,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:39,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:39,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312990989] [2022-04-06 18:48:39,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312990989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:39,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:39,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:39,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:39,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1009686899] [2022-04-06 18:48:39,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1009686899] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:39,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:39,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:39,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725895782] [2022-04-06 18:48:39,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:39,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:48:39,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:39,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:48:39,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:48:39,523 INFO L87 Difference]: Start difference. First operand 618 states and 888 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-04-06 18:48:40,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:40,389 INFO L93 Difference]: Finished difference Result 665 states and 952 transitions. [2022-04-06 18:48:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:48:40,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 3 states have internal predecessors, (26), 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 36 [2022-04-06 18:48:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:40,394 INFO L225 Difference]: With dead ends: 665 [2022-04-06 18:48:40,394 INFO L226 Difference]: Without dead ends: 661 [2022-04-06 18:48:40,395 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 [2022-04-06 18:48:40,396 INFO L913 BasicCegarLoop]: 340 mSDtfsCounter, 126 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:40,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 590 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:48:40,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-04-06 18:48:40,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 628. [2022-04-06 18:48:40,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 466 states have (on average 1.354077253218884) internal successors, (631), 475 states have internal predecessors, (631), 108 states have call successors, (108), 50 states have call predecessors, (108), 53 states have return successors, (162), 105 states have call predecessors, (162), 98 states have call successors, (162) [2022-04-06 18:48:40,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 901 transitions. [2022-04-06 18:48:40,465 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 901 transitions. Word has length 36 [2022-04-06 18:48:40,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:40,466 INFO L478 AbstractCegarLoop]: Abstraction has 628 states and 901 transitions. [2022-04-06 18:48:40,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-04-06 18:48:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 901 transitions. [2022-04-06 18:48:40,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 18:48:40,470 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:40,470 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] [2022-04-06 18:48:40,470 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 18:48:40,470 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:40,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:40,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1988078361, now seen corresponding path program 1 times [2022-04-06 18:48:40,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:40,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2116794007] [2022-04-06 18:48:40,472 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:40,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1988078361, now seen corresponding path program 2 times [2022-04-06 18:48:40,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:40,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492592624] [2022-04-06 18:48:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:40,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:48:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:40,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:40,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492592624] [2022-04-06 18:48:40,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492592624] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:40,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:40,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:40,711 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:40,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2116794007] [2022-04-06 18:48:40,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2116794007] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:40,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:40,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:40,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120718489] [2022-04-06 18:48:40,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:40,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:48:40,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:40,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:48:40,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:48:40,713 INFO L87 Difference]: Start difference. First operand 628 states and 901 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-04-06 18:48:42,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:42,025 INFO L93 Difference]: Finished difference Result 716 states and 1015 transitions. [2022-04-06 18:48:42,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:48:42,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 7 states have internal predecessors, (27), 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 39 [2022-04-06 18:48:42,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:42,030 INFO L225 Difference]: With dead ends: 716 [2022-04-06 18:48:42,030 INFO L226 Difference]: Without dead ends: 705 [2022-04-06 18:48:42,031 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-04-06 18:48:42,032 INFO L913 BasicCegarLoop]: 302 mSDtfsCounter, 1044 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:42,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 750 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 18:48:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-04-06 18:48:42,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 658. [2022-04-06 18:48:42,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 488 states have (on average 1.348360655737705) internal successors, (658), 502 states have internal predecessors, (658), 109 states have call successors, (109), 51 states have call predecessors, (109), 60 states have return successors, (169), 108 states have call predecessors, (169), 99 states have call successors, (169) [2022-04-06 18:48:42,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 936 transitions. [2022-04-06 18:48:42,117 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 936 transitions. Word has length 39 [2022-04-06 18:48:42,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:42,119 INFO L478 AbstractCegarLoop]: Abstraction has 658 states and 936 transitions. [2022-04-06 18:48:42,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-04-06 18:48:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 936 transitions. [2022-04-06 18:48:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 18:48:42,120 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:42,120 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] [2022-04-06 18:48:42,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 18:48:42,121 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:42,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1064338611, now seen corresponding path program 1 times [2022-04-06 18:48:42,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:42,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1927340007] [2022-04-06 18:48:42,122 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:42,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1064338611, now seen corresponding path program 2 times [2022-04-06 18:48:42,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:42,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175142848] [2022-04-06 18:48:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:42,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:42,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:42,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:42,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:42,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:42,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:48:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:42,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:42,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175142848] [2022-04-06 18:48:42,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175142848] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:42,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:42,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:42,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:42,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1927340007] [2022-04-06 18:48:42,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1927340007] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:42,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:42,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:42,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004211705] [2022-04-06 18:48:42,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:42,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:48:42,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:42,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:48:42,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:48:42,359 INFO L87 Difference]: Start difference. First operand 658 states and 936 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) [2022-04-06 18:48:43,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:43,454 INFO L93 Difference]: Finished difference Result 713 states and 1008 transitions. [2022-04-06 18:48:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:48:43,455 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 [2022-04-06 18:48:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:43,464 INFO L225 Difference]: With dead ends: 713 [2022-04-06 18:48:43,464 INFO L226 Difference]: Without dead ends: 705 [2022-04-06 18:48:43,465 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-04-06 18:48:43,466 INFO L913 BasicCegarLoop]: 303 mSDtfsCounter, 787 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:43,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 653 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:48:43,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-04-06 18:48:43,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 658. [2022-04-06 18:48:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 488 states have (on average 1.346311475409836) internal successors, (657), 502 states have internal predecessors, (657), 109 states have call successors, (109), 51 states have call predecessors, (109), 60 states have return successors, (169), 108 states have call predecessors, (169), 99 states have call successors, (169) [2022-04-06 18:48:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 935 transitions. [2022-04-06 18:48:43,543 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 935 transitions. Word has length 40 [2022-04-06 18:48:43,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:43,543 INFO L478 AbstractCegarLoop]: Abstraction has 658 states and 935 transitions. [2022-04-06 18:48:43,544 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) [2022-04-06 18:48:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 935 transitions. [2022-04-06 18:48:43,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 18:48:43,545 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:43,546 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] [2022-04-06 18:48:43,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 18:48:43,546 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:43,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:43,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1632785520, now seen corresponding path program 1 times [2022-04-06 18:48:43,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:43,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [222661047] [2022-04-06 18:48:43,547 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1632785520, now seen corresponding path program 2 times [2022-04-06 18:48:43,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:43,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138645905] [2022-04-06 18:48:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:43,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:43,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:43,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:43,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:43,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:43,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:48:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:43,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138645905] [2022-04-06 18:48:43,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138645905] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:43,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:43,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:48:43,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:43,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [222661047] [2022-04-06 18:48:43,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [222661047] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:43,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:43,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:48:43,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934576124] [2022-04-06 18:48:43,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:43,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:48:43,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:43,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:48:43,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:48:43,706 INFO L87 Difference]: Start difference. First operand 658 states and 935 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 18:48:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:44,836 INFO L93 Difference]: Finished difference Result 1215 states and 1783 transitions. [2022-04-06 18:48:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:48:44,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2022-04-06 18:48:44,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:44,844 INFO L225 Difference]: With dead ends: 1215 [2022-04-06 18:48:44,844 INFO L226 Difference]: Without dead ends: 1186 [2022-04-06 18:48:44,845 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:48:44,846 INFO L913 BasicCegarLoop]: 392 mSDtfsCounter, 995 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:44,846 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1000 Valid, 798 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:48:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-04-06 18:48:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1085. [2022-04-06 18:48:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 817 states have (on average 1.3635250917992656) internal successors, (1114), 835 states have internal predecessors, (1114), 173 states have call successors, (173), 79 states have call predecessors, (173), 94 states have return successors, (315), 175 states have call predecessors, (315), 163 states have call successors, (315) [2022-04-06 18:48:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 1602 transitions. [2022-04-06 18:48:44,976 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 1602 transitions. Word has length 41 [2022-04-06 18:48:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:44,976 INFO L478 AbstractCegarLoop]: Abstraction has 1085 states and 1602 transitions. [2022-04-06 18:48:44,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 18:48:44,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 1602 transitions. [2022-04-06 18:48:44,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 18:48:44,978 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:44,978 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] [2022-04-06 18:48:44,978 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 18:48:44,978 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:44,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:44,979 INFO L85 PathProgramCache]: Analyzing trace with hash 931290683, now seen corresponding path program 1 times [2022-04-06 18:48:44,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:44,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [907347093] [2022-04-06 18:48:44,980 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:44,980 INFO L85 PathProgramCache]: Analyzing trace with hash 931290683, now seen corresponding path program 2 times [2022-04-06 18:48:44,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:44,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170164972] [2022-04-06 18:48:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:44,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:45,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:45,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:45,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:45,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:45,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:48:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:45,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:45,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170164972] [2022-04-06 18:48:45,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170164972] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:45,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:45,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:48:45,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:45,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [907347093] [2022-04-06 18:48:45,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [907347093] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:45,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:45,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:48:45,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546149182] [2022-04-06 18:48:45,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:45,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:48:45,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:45,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:48:45,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:48:45,165 INFO L87 Difference]: Start difference. First operand 1085 states and 1602 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) [2022-04-06 18:48:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:45,930 INFO L93 Difference]: Finished difference Result 1170 states and 1724 transitions. [2022-04-06 18:48:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:48:45,930 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 [2022-04-06 18:48:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:45,937 INFO L225 Difference]: With dead ends: 1170 [2022-04-06 18:48:45,937 INFO L226 Difference]: Without dead ends: 1148 [2022-04-06 18:48:45,938 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 [2022-04-06 18:48:45,938 INFO L913 BasicCegarLoop]: 327 mSDtfsCounter, 458 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:45,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 1017 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 18:48:45,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-04-06 18:48:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1078. [2022-04-06 18:48:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 813 states have (on average 1.3640836408364083) internal successors, (1109), 831 states have internal predecessors, (1109), 171 states have call successors, (171), 78 states have call predecessors, (171), 93 states have return successors, (313), 173 states have call predecessors, (313), 161 states have call successors, (313) [2022-04-06 18:48:46,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1593 transitions. [2022-04-06 18:48:46,059 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1593 transitions. Word has length 42 [2022-04-06 18:48:46,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:46,060 INFO L478 AbstractCegarLoop]: Abstraction has 1078 states and 1593 transitions. [2022-04-06 18:48:46,060 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) [2022-04-06 18:48:46,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1593 transitions. [2022-04-06 18:48:46,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 18:48:46,062 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:46,062 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] [2022-04-06 18:48:46,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-06 18:48:46,062 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:46,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:46,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1303038604, now seen corresponding path program 1 times [2022-04-06 18:48:46,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:46,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [318377936] [2022-04-06 18:48:46,064 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:46,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1303038604, now seen corresponding path program 2 times [2022-04-06 18:48:46,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:46,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568750993] [2022-04-06 18:48:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:46,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:46,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:46,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:46,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:46,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:46,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568750993] [2022-04-06 18:48:46,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568750993] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:46,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:46,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:46,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:46,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [318377936] [2022-04-06 18:48:46,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [318377936] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:46,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:46,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:46,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574559493] [2022-04-06 18:48:46,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:46,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:48:46,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:46,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:48:46,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:48:46,191 INFO L87 Difference]: Start difference. First operand 1078 states and 1593 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 18:48:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:47,016 INFO L93 Difference]: Finished difference Result 1507 states and 2275 transitions. [2022-04-06 18:48:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:48:47,017 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-04-06 18:48:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:47,021 INFO L225 Difference]: With dead ends: 1507 [2022-04-06 18:48:47,021 INFO L226 Difference]: Without dead ends: 599 [2022-04-06 18:48:47,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:48:47,028 INFO L913 BasicCegarLoop]: 281 mSDtfsCounter, 370 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:47,028 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 340 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 18:48:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-04-06 18:48:47,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 598. [2022-04-06 18:48:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 443 states have (on average 1.327313769751693) internal successors, (588), 455 states have internal predecessors, (588), 102 states have call successors, (102), 47 states have call predecessors, (102), 52 states have return successors, (160), 98 states have call predecessors, (160), 94 states have call successors, (160) [2022-04-06 18:48:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 850 transitions. [2022-04-06 18:48:47,092 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 850 transitions. Word has length 45 [2022-04-06 18:48:47,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:47,092 INFO L478 AbstractCegarLoop]: Abstraction has 598 states and 850 transitions. [2022-04-06 18:48:47,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 18:48:47,093 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 850 transitions. [2022-04-06 18:48:47,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 18:48:47,093 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:47,094 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] [2022-04-06 18:48:47,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-06 18:48:47,094 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:47,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:47,097 INFO L85 PathProgramCache]: Analyzing trace with hash -66301101, now seen corresponding path program 1 times [2022-04-06 18:48:47,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:47,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [469680703] [2022-04-06 18:48:47,097 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:47,097 INFO L85 PathProgramCache]: Analyzing trace with hash -66301101, now seen corresponding path program 2 times [2022-04-06 18:48:47,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:47,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024054703] [2022-04-06 18:48:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:47,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:47,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:47,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:47,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:47,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:48:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:47,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:48:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:47,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:47,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024054703] [2022-04-06 18:48:47,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024054703] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:47,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:47,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:48:47,262 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:47,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [469680703] [2022-04-06 18:48:47,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [469680703] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:47,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:47,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:48:47,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722685438] [2022-04-06 18:48:47,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:47,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 18:48:47,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:47,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 18:48:47,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:48:47,264 INFO L87 Difference]: Start difference. First operand 598 states and 850 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 5 states have internal predecessors, (34), 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) [2022-04-06 18:48:48,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:48,296 INFO L93 Difference]: Finished difference Result 633 states and 893 transitions. [2022-04-06 18:48:48,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:48:48,296 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 5 states have internal predecessors, (34), 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 46 [2022-04-06 18:48:48,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:48,300 INFO L225 Difference]: With dead ends: 633 [2022-04-06 18:48:48,300 INFO L226 Difference]: Without dead ends: 608 [2022-04-06 18:48:48,301 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 [2022-04-06 18:48:48,301 INFO L913 BasicCegarLoop]: 293 mSDtfsCounter, 112 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:48,301 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1206 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:48:48,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-04-06 18:48:48,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 596. [2022-04-06 18:48:48,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 442 states have (on average 1.3235294117647058) internal successors, (585), 454 states have internal predecessors, (585), 101 states have call successors, (101), 47 states have call predecessors, (101), 52 states have return successors, (159), 97 states have call predecessors, (159), 93 states have call successors, (159) [2022-04-06 18:48:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 845 transitions. [2022-04-06 18:48:48,365 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 845 transitions. Word has length 46 [2022-04-06 18:48:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:48,365 INFO L478 AbstractCegarLoop]: Abstraction has 596 states and 845 transitions. [2022-04-06 18:48:48,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 5 states have internal predecessors, (34), 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) [2022-04-06 18:48:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 845 transitions. [2022-04-06 18:48:48,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 18:48:48,366 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:48,366 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] [2022-04-06 18:48:48,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-06 18:48:48,366 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:48,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:48,367 INFO L85 PathProgramCache]: Analyzing trace with hash -12862173, now seen corresponding path program 1 times [2022-04-06 18:48:48,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:48,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [729371892] [2022-04-06 18:48:48,367 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:48,367 INFO L85 PathProgramCache]: Analyzing trace with hash -12862173, now seen corresponding path program 2 times [2022-04-06 18:48:48,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:48,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495787387] [2022-04-06 18:48:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:48,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:48,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:48,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:48,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:48,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:48:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:48,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:48,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:48,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495787387] [2022-04-06 18:48:48,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495787387] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:48,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:48,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:48:48,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:48,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [729371892] [2022-04-06 18:48:48,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [729371892] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:48,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:48,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:48:48,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275185156] [2022-04-06 18:48:48,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:48,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:48:48,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:48,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:48:48,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:48:48,565 INFO L87 Difference]: Start difference. First operand 596 states and 845 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) [2022-04-06 18:48:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:49,610 INFO L93 Difference]: Finished difference Result 834 states and 1234 transitions. [2022-04-06 18:48:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:48:49,610 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 [2022-04-06 18:48:49,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:49,616 INFO L225 Difference]: With dead ends: 834 [2022-04-06 18:48:49,616 INFO L226 Difference]: Without dead ends: 826 [2022-04-06 18:48:49,617 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:48:49,617 INFO L913 BasicCegarLoop]: 324 mSDtfsCounter, 498 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:49,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 703 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:48:49,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-04-06 18:48:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 665. [2022-04-06 18:48:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 495 states have (on average 1.3232323232323233) internal successors, (655), 508 states have internal predecessors, (655), 109 states have call successors, (109), 50 states have call predecessors, (109), 60 states have return successors, (184), 110 states have call predecessors, (184), 101 states have call successors, (184) [2022-04-06 18:48:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 948 transitions. [2022-04-06 18:48:49,700 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 948 transitions. Word has length 46 [2022-04-06 18:48:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:49,700 INFO L478 AbstractCegarLoop]: Abstraction has 665 states and 948 transitions. [2022-04-06 18:48:49,700 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) [2022-04-06 18:48:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 948 transitions. [2022-04-06 18:48:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 18:48:49,701 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:49,701 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:48:49,701 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-06 18:48:49,701 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:49,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:49,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1099213797, now seen corresponding path program 1 times [2022-04-06 18:48:49,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:49,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [90390168] [2022-04-06 18:48:49,702 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:49,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1099213797, now seen corresponding path program 2 times [2022-04-06 18:48:49,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:49,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509495511] [2022-04-06 18:48:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:49,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:49,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:49,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:49,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:49,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 18:48:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:49,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:49,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509495511] [2022-04-06 18:48:49,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509495511] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:49,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:49,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:48:49,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:49,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [90390168] [2022-04-06 18:48:49,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [90390168] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:49,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:49,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:48:49,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777528122] [2022-04-06 18:48:49,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:49,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:48:49,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:49,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:48:49,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:48:49,874 INFO L87 Difference]: Start difference. First operand 665 states and 948 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 18:48:50,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:50,617 INFO L93 Difference]: Finished difference Result 739 states and 1021 transitions. [2022-04-06 18:48:50,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:48:50,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-04-06 18:48:50,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:50,620 INFO L225 Difference]: With dead ends: 739 [2022-04-06 18:48:50,620 INFO L226 Difference]: Without dead ends: 462 [2022-04-06 18:48:50,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:48:50,623 INFO L913 BasicCegarLoop]: 314 mSDtfsCounter, 549 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:50,623 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 651 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 18:48:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-04-06 18:48:50,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 441. [2022-04-06 18:48:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 327 states have (on average 1.27217125382263) internal successors, (416), 338 states have internal predecessors, (416), 69 states have call successors, (69), 38 states have call predecessors, (69), 44 states have return successors, (93), 68 states have call predecessors, (93), 61 states have call successors, (93) [2022-04-06 18:48:50,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 578 transitions. [2022-04-06 18:48:50,692 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 578 transitions. Word has length 50 [2022-04-06 18:48:50,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:50,692 INFO L478 AbstractCegarLoop]: Abstraction has 441 states and 578 transitions. [2022-04-06 18:48:50,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 18:48:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 578 transitions. [2022-04-06 18:48:50,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 18:48:50,693 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:50,693 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] [2022-04-06 18:48:50,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-06 18:48:50,693 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:50,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:50,694 INFO L85 PathProgramCache]: Analyzing trace with hash 54275897, now seen corresponding path program 1 times [2022-04-06 18:48:50,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:50,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [31536147] [2022-04-06 18:48:50,694 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:50,694 INFO L85 PathProgramCache]: Analyzing trace with hash 54275897, now seen corresponding path program 2 times [2022-04-06 18:48:50,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:50,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555171469] [2022-04-06 18:48:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:50,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:50,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:50,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:50,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:50,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:48:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:50,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:50,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:50,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555171469] [2022-04-06 18:48:50,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555171469] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:50,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:50,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:48:50,938 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:50,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [31536147] [2022-04-06 18:48:50,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [31536147] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:50,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:50,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:48:50,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615502930] [2022-04-06 18:48:50,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:50,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:48:50,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:50,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:48:50,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:48:50,940 INFO L87 Difference]: Start difference. First operand 441 states and 578 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 6 states have internal predecessors, (35), 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) [2022-04-06 18:48:52,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:52,051 INFO L93 Difference]: Finished difference Result 457 states and 597 transitions. [2022-04-06 18:48:52,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:48:52,052 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 6 states have internal predecessors, (35), 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 47 [2022-04-06 18:48:52,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:52,054 INFO L225 Difference]: With dead ends: 457 [2022-04-06 18:48:52,054 INFO L226 Difference]: Without dead ends: 453 [2022-04-06 18:48:52,055 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 [2022-04-06 18:48:52,055 INFO L913 BasicCegarLoop]: 284 mSDtfsCounter, 91 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:52,055 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1490 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 18:48:52,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-04-06 18:48:52,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 449. [2022-04-06 18:48:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 334 states have (on average 1.2724550898203593) internal successors, (425), 346 states have internal predecessors, (425), 70 states have call successors, (70), 38 states have call predecessors, (70), 44 states have return successors, (94), 69 states have call predecessors, (94), 62 states have call successors, (94) [2022-04-06 18:48:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 589 transitions. [2022-04-06 18:48:52,113 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 589 transitions. Word has length 47 [2022-04-06 18:48:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:52,113 INFO L478 AbstractCegarLoop]: Abstraction has 449 states and 589 transitions. [2022-04-06 18:48:52,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 6 states have internal predecessors, (35), 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) [2022-04-06 18:48:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 589 transitions. [2022-04-06 18:48:52,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 18:48:52,114 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:52,114 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] [2022-04-06 18:48:52,114 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-06 18:48:52,114 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:52,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:52,115 INFO L85 PathProgramCache]: Analyzing trace with hash 53999067, now seen corresponding path program 1 times [2022-04-06 18:48:52,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:52,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1819211560] [2022-04-06 18:48:52,115 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:52,115 INFO L85 PathProgramCache]: Analyzing trace with hash 53999067, now seen corresponding path program 2 times [2022-04-06 18:48:52,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:52,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847266225] [2022-04-06 18:48:52,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:52,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:52,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:52,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:52,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:52,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:48:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:52,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:52,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:52,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847266225] [2022-04-06 18:48:52,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847266225] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:52,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:52,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:48:52,362 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:52,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1819211560] [2022-04-06 18:48:52,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1819211560] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:52,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:52,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:48:52,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474145781] [2022-04-06 18:48:52,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:52,363 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:48:52,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:48:52,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:48:52,364 INFO L87 Difference]: Start difference. First operand 449 states and 589 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 6 states have internal predecessors, (35), 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) [2022-04-06 18:48:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:53,150 INFO L93 Difference]: Finished difference Result 780 states and 1069 transitions. [2022-04-06 18:48:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:48:53,150 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 6 states have internal predecessors, (35), 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 47 [2022-04-06 18:48:53,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:53,156 INFO L225 Difference]: With dead ends: 780 [2022-04-06 18:48:53,157 INFO L226 Difference]: Without dead ends: 472 [2022-04-06 18:48:53,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:48:53,159 INFO L913 BasicCegarLoop]: 286 mSDtfsCounter, 188 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:53,160 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 1497 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:48:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-04-06 18:48:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 459. [2022-04-06 18:48:53,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 343 states have (on average 1.2769679300291545) internal successors, (438), 356 states have internal predecessors, (438), 70 states have call successors, (70), 38 states have call predecessors, (70), 45 states have return successors, (96), 69 states have call predecessors, (96), 62 states have call successors, (96) [2022-04-06 18:48:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 604 transitions. [2022-04-06 18:48:53,233 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 604 transitions. Word has length 47 [2022-04-06 18:48:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:53,233 INFO L478 AbstractCegarLoop]: Abstraction has 459 states and 604 transitions. [2022-04-06 18:48:53,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 6 states have internal predecessors, (35), 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) [2022-04-06 18:48:53,233 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 604 transitions. [2022-04-06 18:48:53,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 18:48:53,235 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:53,235 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] [2022-04-06 18:48:53,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-06 18:48:53,235 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:53,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:53,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1706472498, now seen corresponding path program 1 times [2022-04-06 18:48:53,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:53,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1638460703] [2022-04-06 18:48:53,236 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:53,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1706472498, now seen corresponding path program 2 times [2022-04-06 18:48:53,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:53,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853643714] [2022-04-06 18:48:53,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:53,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:48:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:53,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:53,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853643714] [2022-04-06 18:48:53,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853643714] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:53,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:53,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:48:53,460 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:53,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1638460703] [2022-04-06 18:48:53,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1638460703] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:53,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:53,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:48:53,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405825013] [2022-04-06 18:48:53,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:53,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:48:53,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:53,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:48:53,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:48:53,462 INFO L87 Difference]: Start difference. First operand 459 states and 604 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-04-06 18:48:54,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:54,551 INFO L93 Difference]: Finished difference Result 594 states and 812 transitions. [2022-04-06 18:48:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 18:48:54,551 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 5 states have internal predecessors, (36), 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 48 [2022-04-06 18:48:54,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:54,555 INFO L225 Difference]: With dead ends: 594 [2022-04-06 18:48:54,555 INFO L226 Difference]: Without dead ends: 575 [2022-04-06 18:48:54,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:48:54,556 INFO L913 BasicCegarLoop]: 317 mSDtfsCounter, 1048 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:54,556 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1062 Valid, 700 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:48:54,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-04-06 18:48:54,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 444. [2022-04-06 18:48:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 332 states have (on average 1.2771084337349397) internal successors, (424), 343 states have internal predecessors, (424), 68 states have call successors, (68), 38 states have call predecessors, (68), 43 states have return successors, (91), 66 states have call predecessors, (91), 60 states have call successors, (91) [2022-04-06 18:48:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 583 transitions. [2022-04-06 18:48:54,635 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 583 transitions. Word has length 48 [2022-04-06 18:48:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:54,636 INFO L478 AbstractCegarLoop]: Abstraction has 444 states and 583 transitions. [2022-04-06 18:48:54,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-04-06 18:48:54,636 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 583 transitions. [2022-04-06 18:48:54,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 18:48:54,637 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:54,637 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] [2022-04-06 18:48:54,638 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-06 18:48:54,638 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:54,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:54,638 INFO L85 PathProgramCache]: Analyzing trace with hash 537684808, now seen corresponding path program 1 times [2022-04-06 18:48:54,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:54,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2018538854] [2022-04-06 18:48:54,638 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:54,639 INFO L85 PathProgramCache]: Analyzing trace with hash 537684808, now seen corresponding path program 2 times [2022-04-06 18:48:54,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:54,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350253213] [2022-04-06 18:48:54,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:54,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:54,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:54,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:54,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:54,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 18:48:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:54,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:48:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:54,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:54,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350253213] [2022-04-06 18:48:54,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350253213] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:54,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:54,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:54,827 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:54,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2018538854] [2022-04-06 18:48:54,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2018538854] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:54,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:54,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:54,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636343172] [2022-04-06 18:48:54,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:54,827 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:48:54,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:54,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:48:54,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:48:54,828 INFO L87 Difference]: Start difference. First operand 444 states and 583 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 18:48:55,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:55,590 INFO L93 Difference]: Finished difference Result 458 states and 599 transitions. [2022-04-06 18:48:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:48:55,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2022-04-06 18:48:55,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:55,593 INFO L225 Difference]: With dead ends: 458 [2022-04-06 18:48:55,593 INFO L226 Difference]: Without dead ends: 427 [2022-04-06 18:48:55,593 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:48:55,594 INFO L913 BasicCegarLoop]: 289 mSDtfsCounter, 231 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:55,594 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1515 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:48:55,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-04-06 18:48:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2022-04-06 18:48:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 318 states have (on average 1.279874213836478) internal successors, (407), 330 states have internal predecessors, (407), 66 states have call successors, (66), 36 states have call predecessors, (66), 42 states have return successors, (89), 64 states have call predecessors, (89), 58 states have call successors, (89) [2022-04-06 18:48:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 562 transitions. [2022-04-06 18:48:55,661 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 562 transitions. Word has length 49 [2022-04-06 18:48:55,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:55,661 INFO L478 AbstractCegarLoop]: Abstraction has 427 states and 562 transitions. [2022-04-06 18:48:55,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 18:48:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 562 transitions. [2022-04-06 18:48:55,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 18:48:55,662 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:55,662 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] [2022-04-06 18:48:55,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-04-06 18:48:55,662 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:55,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:55,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1134618754, now seen corresponding path program 1 times [2022-04-06 18:48:55,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:55,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1622398059] [2022-04-06 18:48:55,664 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:55,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1134618754, now seen corresponding path program 2 times [2022-04-06 18:48:55,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:55,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236692963] [2022-04-06 18:48:55,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:55,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:55,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:55,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:55,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:55,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:48:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:55,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 18:48:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:55,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:55,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236692963] [2022-04-06 18:48:55,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236692963] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:55,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:55,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:48:55,831 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:55,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1622398059] [2022-04-06 18:48:55,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1622398059] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:55,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:55,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:48:55,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317431425] [2022-04-06 18:48:55,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:55,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 18:48:55,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:55,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 18:48:55,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:48:55,832 INFO L87 Difference]: Start difference. First operand 427 states and 562 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) [2022-04-06 18:48:56,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:56,733 INFO L93 Difference]: Finished difference Result 456 states and 600 transitions. [2022-04-06 18:48:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:48:56,734 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 [2022-04-06 18:48:56,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:56,736 INFO L225 Difference]: With dead ends: 456 [2022-04-06 18:48:56,736 INFO L226 Difference]: Without dead ends: 423 [2022-04-06 18:48:56,737 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 [2022-04-06 18:48:56,737 INFO L913 BasicCegarLoop]: 271 mSDtfsCounter, 174 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:56,737 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 1145 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:48:56,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-04-06 18:48:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 409. [2022-04-06 18:48:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 304 states have (on average 1.2861842105263157) internal successors, (391), 316 states have internal predecessors, (391), 64 states have call successors, (64), 34 states have call predecessors, (64), 40 states have return successors, (87), 62 states have call predecessors, (87), 56 states have call successors, (87) [2022-04-06 18:48:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 542 transitions. [2022-04-06 18:48:56,797 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 542 transitions. Word has length 50 [2022-04-06 18:48:56,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:56,798 INFO L478 AbstractCegarLoop]: Abstraction has 409 states and 542 transitions. [2022-04-06 18:48:56,798 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) [2022-04-06 18:48:56,798 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 542 transitions. [2022-04-06 18:48:56,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 18:48:56,798 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:56,798 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] [2022-04-06 18:48:56,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-04-06 18:48:56,799 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:56,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:56,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1095396871, now seen corresponding path program 1 times [2022-04-06 18:48:56,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:56,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [219587765] [2022-04-06 18:48:56,799 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:56,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1095396871, now seen corresponding path program 2 times [2022-04-06 18:48:56,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:56,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732621365] [2022-04-06 18:48:56,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:56,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:56,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:56,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:56,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:56,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:48:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:56,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:56,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:56,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732621365] [2022-04-06 18:48:56,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732621365] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:56,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:56,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:48:56,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:56,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [219587765] [2022-04-06 18:48:56,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [219587765] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:56,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:56,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:48:56,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183185906] [2022-04-06 18:48:56,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:56,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 18:48:56,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 18:48:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:48:56,977 INFO L87 Difference]: Start difference. First operand 409 states and 542 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 18:48:58,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:58,522 INFO L93 Difference]: Finished difference Result 634 states and 905 transitions. [2022-04-06 18:48:58,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:48:58,523 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2022-04-06 18:48:58,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:58,525 INFO L225 Difference]: With dead ends: 634 [2022-04-06 18:48:58,526 INFO L226 Difference]: Without dead ends: 600 [2022-04-06 18:48:58,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-04-06 18:48:58,527 INFO L913 BasicCegarLoop]: 415 mSDtfsCounter, 624 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:58,527 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 1378 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 18:48:58,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-04-06 18:48:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 534. [2022-04-06 18:48:58,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 399 states have (on average 1.3433583959899749) internal successors, (536), 410 states have internal predecessors, (536), 92 states have call successors, (92), 37 states have call predecessors, (92), 42 states have return successors, (141), 88 states have call predecessors, (141), 84 states have call successors, (141) [2022-04-06 18:48:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 769 transitions. [2022-04-06 18:48:58,597 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 769 transitions. Word has length 50 [2022-04-06 18:48:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:58,598 INFO L478 AbstractCegarLoop]: Abstraction has 534 states and 769 transitions. [2022-04-06 18:48:58,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 18:48:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 769 transitions. [2022-04-06 18:48:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 18:48:58,598 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:58,598 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] [2022-04-06 18:48:58,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-04-06 18:48:58,599 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:58,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash -891835120, now seen corresponding path program 1 times [2022-04-06 18:48:58,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:58,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1886737067] [2022-04-06 18:48:58,600 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:58,600 INFO L85 PathProgramCache]: Analyzing trace with hash -891835120, now seen corresponding path program 2 times [2022-04-06 18:48:58,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:58,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275477051] [2022-04-06 18:48:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:58,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:58,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:58,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:58,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:58,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:48:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:58,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:58,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:58,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275477051] [2022-04-06 18:48:58,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275477051] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:58,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:58,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:48:58,753 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:58,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1886737067] [2022-04-06 18:48:58,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1886737067] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:58,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:58,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:48:58,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945993862] [2022-04-06 18:48:58,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:58,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:48:58,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:58,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:48:58,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:48:58,754 INFO L87 Difference]: Start difference. First operand 534 states and 769 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 18:48:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:59,495 INFO L93 Difference]: Finished difference Result 587 states and 833 transitions. [2022-04-06 18:48:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:48:59,495 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2022-04-06 18:48:59,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:59,498 INFO L225 Difference]: With dead ends: 587 [2022-04-06 18:48:59,498 INFO L226 Difference]: Without dead ends: 555 [2022-04-06 18:48:59,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-04-06 18:48:59,499 INFO L913 BasicCegarLoop]: 240 mSDtfsCounter, 616 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:59,499 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 730 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 18:48:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-04-06 18:48:59,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 537. [2022-04-06 18:48:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 402 states have (on average 1.3432835820895523) internal successors, (540), 413 states have internal predecessors, (540), 92 states have call successors, (92), 37 states have call predecessors, (92), 42 states have return successors, (141), 88 states have call predecessors, (141), 84 states have call successors, (141) [2022-04-06 18:48:59,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 773 transitions. [2022-04-06 18:48:59,573 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 773 transitions. Word has length 51 [2022-04-06 18:48:59,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:59,574 INFO L478 AbstractCegarLoop]: Abstraction has 537 states and 773 transitions. [2022-04-06 18:48:59,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 18:48:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 773 transitions. [2022-04-06 18:48:59,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 18:48:59,575 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:59,575 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] [2022-04-06 18:48:59,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-06 18:48:59,575 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:59,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:59,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1408987470, now seen corresponding path program 1 times [2022-04-06 18:48:59,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:59,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [674845760] [2022-04-06 18:48:59,576 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:59,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1408987470, now seen corresponding path program 2 times [2022-04-06 18:48:59,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:59,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108467369] [2022-04-06 18:48:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:59,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:48:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:59,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:59,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108467369] [2022-04-06 18:48:59,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108467369] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:59,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:59,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:59,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:59,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [674845760] [2022-04-06 18:48:59,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [674845760] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:59,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:59,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:59,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820429251] [2022-04-06 18:48:59,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:59,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:48:59,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:59,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:48:59,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:48:59,735 INFO L87 Difference]: Start difference. First operand 537 states and 773 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 18:49:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:00,569 INFO L93 Difference]: Finished difference Result 670 states and 993 transitions. [2022-04-06 18:49:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:49:00,570 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 51 [2022-04-06 18:49:00,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:00,573 INFO L225 Difference]: With dead ends: 670 [2022-04-06 18:49:00,573 INFO L226 Difference]: Without dead ends: 624 [2022-04-06 18:49:00,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-04-06 18:49:00,574 INFO L913 BasicCegarLoop]: 291 mSDtfsCounter, 788 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:00,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 1040 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 18:49:00,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-04-06 18:49:00,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 529. [2022-04-06 18:49:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 394 states have (on average 1.3350253807106598) internal successors, (526), 405 states have internal predecessors, (526), 92 states have call successors, (92), 37 states have call predecessors, (92), 42 states have return successors, (141), 88 states have call predecessors, (141), 84 states have call successors, (141) [2022-04-06 18:49:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 759 transitions. [2022-04-06 18:49:00,669 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 759 transitions. Word has length 51 [2022-04-06 18:49:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:00,670 INFO L478 AbstractCegarLoop]: Abstraction has 529 states and 759 transitions. [2022-04-06 18:49:00,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 18:49:00,670 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 759 transitions. [2022-04-06 18:49:00,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 18:49:00,670 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:00,671 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] [2022-04-06 18:49:00,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-06 18:49:00,671 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:00,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:00,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1555680272, now seen corresponding path program 1 times [2022-04-06 18:49:00,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:00,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1612941540] [2022-04-06 18:49:00,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:00,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1555680272, now seen corresponding path program 2 times [2022-04-06 18:49:00,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:00,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400529369] [2022-04-06 18:49:00,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:00,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:00,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:00,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:00,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:00,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:49:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:00,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:00,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:00,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400529369] [2022-04-06 18:49:00,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400529369] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:00,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:00,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:49:00,794 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:00,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1612941540] [2022-04-06 18:49:00,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1612941540] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:00,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:00,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:49:00,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980355878] [2022-04-06 18:49:00,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:00,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 18:49:00,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:00,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 18:49:00,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 18:49:00,795 INFO L87 Difference]: Start difference. First operand 529 states and 759 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 18:49:01,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:01,599 INFO L93 Difference]: Finished difference Result 714 states and 1095 transitions. [2022-04-06 18:49:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 18:49:01,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 51 [2022-04-06 18:49:01,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:01,604 INFO L225 Difference]: With dead ends: 714 [2022-04-06 18:49:01,604 INFO L226 Difference]: Without dead ends: 701 [2022-04-06 18:49:01,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-04-06 18:49:01,605 INFO L913 BasicCegarLoop]: 375 mSDtfsCounter, 367 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:01,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 716 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 18:49:01,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-04-06 18:49:01,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 524. [2022-04-06 18:49:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 390 states have (on average 1.3307692307692307) internal successors, (519), 400 states have internal predecessors, (519), 91 states have call successors, (91), 37 states have call predecessors, (91), 42 states have return successors, (141), 88 states have call predecessors, (141), 84 states have call successors, (141) [2022-04-06 18:49:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 751 transitions. [2022-04-06 18:49:01,714 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 751 transitions. Word has length 51 [2022-04-06 18:49:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:01,714 INFO L478 AbstractCegarLoop]: Abstraction has 524 states and 751 transitions. [2022-04-06 18:49:01,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 18:49:01,714 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 751 transitions. [2022-04-06 18:49:01,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 18:49:01,715 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:01,715 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] [2022-04-06 18:49:01,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-04-06 18:49:01,715 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:01,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1434451436, now seen corresponding path program 1 times [2022-04-06 18:49:01,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:01,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [318111480] [2022-04-06 18:49:01,716 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1434451436, now seen corresponding path program 2 times [2022-04-06 18:49:01,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:01,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484544960] [2022-04-06 18:49:01,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:01,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:01,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:01,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:01,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:01,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:49:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:01,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:01,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:01,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484544960] [2022-04-06 18:49:01,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484544960] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:01,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:01,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:01,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:01,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [318111480] [2022-04-06 18:49:01,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [318111480] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:01,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:01,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:01,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132487437] [2022-04-06 18:49:01,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:01,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:49:01,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:01,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:49:01,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:01,877 INFO L87 Difference]: Start difference. First operand 524 states and 751 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 18:49:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:02,619 INFO L93 Difference]: Finished difference Result 547 states and 781 transitions. [2022-04-06 18:49:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:49:02,621 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 52 [2022-04-06 18:49:02,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:02,623 INFO L225 Difference]: With dead ends: 547 [2022-04-06 18:49:02,623 INFO L226 Difference]: Without dead ends: 543 [2022-04-06 18:49:02,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:49:02,624 INFO L913 BasicCegarLoop]: 253 mSDtfsCounter, 76 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:02,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1341 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 18:49:02,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-04-06 18:49:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 531. [2022-04-06 18:49:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 396 states have (on average 1.3282828282828283) internal successors, (526), 407 states have internal predecessors, (526), 92 states have call successors, (92), 37 states have call predecessors, (92), 42 states have return successors, (142), 89 states have call predecessors, (142), 85 states have call successors, (142) [2022-04-06 18:49:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 760 transitions. [2022-04-06 18:49:02,709 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 760 transitions. Word has length 52 [2022-04-06 18:49:02,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:02,709 INFO L478 AbstractCegarLoop]: Abstraction has 531 states and 760 transitions. [2022-04-06 18:49:02,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 18:49:02,709 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 760 transitions. [2022-04-06 18:49:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 18:49:02,710 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:02,710 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] [2022-04-06 18:49:02,710 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-04-06 18:49:02,710 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:02,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:02,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1434174606, now seen corresponding path program 1 times [2022-04-06 18:49:02,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:02,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1524102500] [2022-04-06 18:49:02,711 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:02,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1434174606, now seen corresponding path program 2 times [2022-04-06 18:49:02,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:02,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358244361] [2022-04-06 18:49:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:02,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:02,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:02,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:02,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:02,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:49:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:02,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:02,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:02,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358244361] [2022-04-06 18:49:02,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358244361] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:02,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:02,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:02,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:02,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1524102500] [2022-04-06 18:49:02,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1524102500] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:02,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:02,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:02,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145444640] [2022-04-06 18:49:02,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:02,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:49:02,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:02,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:49:02,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:02,877 INFO L87 Difference]: Start difference. First operand 531 states and 760 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 18:49:03,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:03,484 INFO L93 Difference]: Finished difference Result 562 states and 797 transitions. [2022-04-06 18:49:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:49:03,485 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 52 [2022-04-06 18:49:03,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:03,488 INFO L225 Difference]: With dead ends: 562 [2022-04-06 18:49:03,488 INFO L226 Difference]: Without dead ends: 538 [2022-04-06 18:49:03,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:49:03,489 INFO L913 BasicCegarLoop]: 255 mSDtfsCounter, 138 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:03,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1408 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 18:49:03,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-04-06 18:49:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 530. [2022-04-06 18:49:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 395 states have (on average 1.3265822784810126) internal successors, (524), 406 states have internal predecessors, (524), 92 states have call successors, (92), 37 states have call predecessors, (92), 42 states have return successors, (142), 89 states have call predecessors, (142), 85 states have call successors, (142) [2022-04-06 18:49:03,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 758 transitions. [2022-04-06 18:49:03,575 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 758 transitions. Word has length 52 [2022-04-06 18:49:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:03,575 INFO L478 AbstractCegarLoop]: Abstraction has 530 states and 758 transitions. [2022-04-06 18:49:03,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 18:49:03,575 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 758 transitions. [2022-04-06 18:49:03,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 18:49:03,576 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:03,576 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] [2022-04-06 18:49:03,576 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-04-06 18:49:03,576 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:03,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1015972043, now seen corresponding path program 1 times [2022-04-06 18:49:03,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:03,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [633699686] [2022-04-06 18:49:03,577 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:03,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1015972043, now seen corresponding path program 2 times [2022-04-06 18:49:03,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:03,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978823440] [2022-04-06 18:49:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:03,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:03,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:03,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:03,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:03,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:49:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:03,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:03,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 18:49:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:03,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:03,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978823440] [2022-04-06 18:49:03,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978823440] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:03,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:03,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:49:03,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:03,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [633699686] [2022-04-06 18:49:03,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [633699686] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:03,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:03,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:49:03,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153097072] [2022-04-06 18:49:03,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:03,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:49:03,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:03,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:49:03,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:49:03,726 INFO L87 Difference]: Start difference. First operand 530 states and 758 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, (12), 7 states have call predecessors, (12), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 18:49:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:04,224 INFO L93 Difference]: Finished difference Result 955 states and 1439 transitions. [2022-04-06 18:49:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:49:04,224 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, (12), 7 states have call predecessors, (12), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2022-04-06 18:49:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:04,228 INFO L225 Difference]: With dead ends: 955 [2022-04-06 18:49:04,228 INFO L226 Difference]: Without dead ends: 549 [2022-04-06 18:49:04,231 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:04,231 INFO L913 BasicCegarLoop]: 258 mSDtfsCounter, 298 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:04,231 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 652 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 18:49:04,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-04-06 18:49:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 529. [2022-04-06 18:49:04,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 394 states have (on average 1.3197969543147208) internal successors, (520), 405 states have internal predecessors, (520), 92 states have call successors, (92), 37 states have call predecessors, (92), 42 states have return successors, (142), 89 states have call predecessors, (142), 85 states have call successors, (142) [2022-04-06 18:49:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 754 transitions. [2022-04-06 18:49:04,327 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 754 transitions. Word has length 58 [2022-04-06 18:49:04,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:04,327 INFO L478 AbstractCegarLoop]: Abstraction has 529 states and 754 transitions. [2022-04-06 18:49:04,327 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, (12), 7 states have call predecessors, (12), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 18:49:04,327 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 754 transitions. [2022-04-06 18:49:04,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 18:49:04,328 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:04,328 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] [2022-04-06 18:49:04,328 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-04-06 18:49:04,328 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:04,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:04,328 INFO L85 PathProgramCache]: Analyzing trace with hash -72634305, now seen corresponding path program 1 times [2022-04-06 18:49:04,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:04,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1868448054] [2022-04-06 18:49:04,328 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:04,328 INFO L85 PathProgramCache]: Analyzing trace with hash -72634305, now seen corresponding path program 2 times [2022-04-06 18:49:04,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:04,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478506506] [2022-04-06 18:49:04,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:04,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:04,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:04,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:04,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:04,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:49:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:04,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:04,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:04,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478506506] [2022-04-06 18:49:04,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478506506] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:04,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:04,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:49:04,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:04,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1868448054] [2022-04-06 18:49:04,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1868448054] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:04,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:04,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:49:04,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142519354] [2022-04-06 18:49:04,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:04,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:49:04,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:04,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:49:04,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 18:49:04,492 INFO L87 Difference]: Start difference. First operand 529 states and 754 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 18:49:05,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:05,299 INFO L93 Difference]: Finished difference Result 675 states and 1000 transitions. [2022-04-06 18:49:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:49:05,300 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-04-06 18:49:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:05,303 INFO L225 Difference]: With dead ends: 675 [2022-04-06 18:49:05,303 INFO L226 Difference]: Without dead ends: 639 [2022-04-06 18:49:05,304 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:49:05,304 INFO L913 BasicCegarLoop]: 323 mSDtfsCounter, 756 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:05,305 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 693 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 18:49:05,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-04-06 18:49:05,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 560. [2022-04-06 18:49:05,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 415 states have (on average 1.344578313253012) internal successors, (558), 426 states have internal predecessors, (558), 101 states have call successors, (101), 37 states have call predecessors, (101), 43 states have return successors, (165), 98 states have call predecessors, (165), 94 states have call successors, (165) [2022-04-06 18:49:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 824 transitions. [2022-04-06 18:49:05,421 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 824 transitions. Word has length 53 [2022-04-06 18:49:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:05,429 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 824 transitions. [2022-04-06 18:49:05,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 18:49:05,430 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 824 transitions. [2022-04-06 18:49:05,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 18:49:05,430 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:05,430 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] [2022-04-06 18:49:05,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-04-06 18:49:05,431 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:05,431 INFO L85 PathProgramCache]: Analyzing trace with hash -960639770, now seen corresponding path program 1 times [2022-04-06 18:49:05,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:05,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1963066607] [2022-04-06 18:49:05,432 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:05,432 INFO L85 PathProgramCache]: Analyzing trace with hash -960639770, now seen corresponding path program 2 times [2022-04-06 18:49:05,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:05,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757051934] [2022-04-06 18:49:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:05,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:05,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:05,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:05,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:05,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 18:49:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:05,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:05,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:05,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757051934] [2022-04-06 18:49:05,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757051934] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:05,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:05,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:05,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1963066607] [2022-04-06 18:49:05,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1963066607] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:05,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:05,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:05,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995129810] [2022-04-06 18:49:05,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:05,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:49:05,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:05,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:49:05,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:49:05,664 INFO L87 Difference]: Start difference. First operand 560 states and 824 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 18:49:06,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:06,234 INFO L93 Difference]: Finished difference Result 856 states and 1268 transitions. [2022-04-06 18:49:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:49:06,235 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 62 [2022-04-06 18:49:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:06,238 INFO L225 Difference]: With dead ends: 856 [2022-04-06 18:49:06,238 INFO L226 Difference]: Without dead ends: 390 [2022-04-06 18:49:06,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:49:06,241 INFO L913 BasicCegarLoop]: 240 mSDtfsCounter, 200 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:06,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 1417 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:49:06,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-04-06 18:49:06,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 338. [2022-04-06 18:49:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 246 states have (on average 1.2560975609756098) internal successors, (309), 254 states have internal predecessors, (309), 59 states have call successors, (59), 31 states have call predecessors, (59), 32 states have return successors, (74), 54 states have call predecessors, (74), 53 states have call successors, (74) [2022-04-06 18:49:06,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 442 transitions. [2022-04-06 18:49:06,335 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 442 transitions. Word has length 62 [2022-04-06 18:49:06,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:06,335 INFO L478 AbstractCegarLoop]: Abstraction has 338 states and 442 transitions. [2022-04-06 18:49:06,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 18:49:06,335 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 442 transitions. [2022-04-06 18:49:06,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 18:49:06,336 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:06,336 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] [2022-04-06 18:49:06,336 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-04-06 18:49:06,336 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:06,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:06,337 INFO L85 PathProgramCache]: Analyzing trace with hash -293536386, now seen corresponding path program 1 times [2022-04-06 18:49:06,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:06,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1975023130] [2022-04-06 18:49:06,337 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:06,337 INFO L85 PathProgramCache]: Analyzing trace with hash -293536386, now seen corresponding path program 2 times [2022-04-06 18:49:06,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:06,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203887557] [2022-04-06 18:49:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:06,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:49:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:06,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:06,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203887557] [2022-04-06 18:49:06,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203887557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:06,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:06,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:49:06,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:06,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1975023130] [2022-04-06 18:49:06,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1975023130] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:06,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:06,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:49:06,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045722921] [2022-04-06 18:49:06,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:06,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:49:06,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:06,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:49:06,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:49:06,537 INFO L87 Difference]: Start difference. First operand 338 states and 442 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 18:49:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:07,330 INFO L93 Difference]: Finished difference Result 346 states and 454 transitions. [2022-04-06 18:49:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:49:07,331 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2022-04-06 18:49:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:07,333 INFO L225 Difference]: With dead ends: 346 [2022-04-06 18:49:07,333 INFO L226 Difference]: Without dead ends: 304 [2022-04-06 18:49:07,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:49:07,334 INFO L913 BasicCegarLoop]: 227 mSDtfsCounter, 155 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:07,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 1486 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:49:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-04-06 18:49:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 298. [2022-04-06 18:49:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 214 states have (on average 1.2757009345794392) internal successors, (273), 220 states have internal predecessors, (273), 55 states have call successors, (55), 28 states have call predecessors, (55), 28 states have return successors, (70), 50 states have call predecessors, (70), 50 states have call successors, (70) [2022-04-06 18:49:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 398 transitions. [2022-04-06 18:49:07,406 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 398 transitions. Word has length 58 [2022-04-06 18:49:07,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:07,406 INFO L478 AbstractCegarLoop]: Abstraction has 298 states and 398 transitions. [2022-04-06 18:49:07,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 18:49:07,406 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 398 transitions. [2022-04-06 18:49:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 18:49:07,407 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:07,407 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] [2022-04-06 18:49:07,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-04-06 18:49:07,408 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:07,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:07,408 INFO L85 PathProgramCache]: Analyzing trace with hash 476480639, now seen corresponding path program 1 times [2022-04-06 18:49:07,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:07,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [638810208] [2022-04-06 18:49:07,409 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:07,409 INFO L85 PathProgramCache]: Analyzing trace with hash 476480639, now seen corresponding path program 2 times [2022-04-06 18:49:07,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:07,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490301914] [2022-04-06 18:49:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:07,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:07,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:07,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:07,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:07,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 18:49:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:07,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:07,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:07,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:07,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:07,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490301914] [2022-04-06 18:49:07,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490301914] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:07,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:07,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:07,597 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:07,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [638810208] [2022-04-06 18:49:07,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [638810208] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:07,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:07,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:07,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266653116] [2022-04-06 18:49:07,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:07,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:49:07,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:07,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:49:07,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:07,599 INFO L87 Difference]: Start difference. First operand 298 states and 398 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (13), 9 states have call predecessors, (13), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:49:08,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:08,447 INFO L93 Difference]: Finished difference Result 576 states and 798 transitions. [2022-04-06 18:49:08,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:49:08,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (13), 9 states have call predecessors, (13), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-04-06 18:49:08,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:08,450 INFO L225 Difference]: With dead ends: 576 [2022-04-06 18:49:08,450 INFO L226 Difference]: Without dead ends: 316 [2022-04-06 18:49:08,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:49:08,452 INFO L913 BasicCegarLoop]: 200 mSDtfsCounter, 252 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:08,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 830 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 18:49:08,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-04-06 18:49:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 298. [2022-04-06 18:49:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 214 states have (on average 1.266355140186916) internal successors, (271), 220 states have internal predecessors, (271), 55 states have call successors, (55), 28 states have call predecessors, (55), 28 states have return successors, (70), 50 states have call predecessors, (70), 50 states have call successors, (70) [2022-04-06 18:49:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 396 transitions. [2022-04-06 18:49:08,534 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 396 transitions. Word has length 66 [2022-04-06 18:49:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:08,534 INFO L478 AbstractCegarLoop]: Abstraction has 298 states and 396 transitions. [2022-04-06 18:49:08,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (13), 9 states have call predecessors, (13), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:49:08,535 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 396 transitions. [2022-04-06 18:49:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 18:49:08,537 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:08,538 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] [2022-04-06 18:49:08,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-04-06 18:49:08,538 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:08,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1991566019, now seen corresponding path program 1 times [2022-04-06 18:49:08,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:08,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2014869152] [2022-04-06 18:49:08,539 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:08,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1991566019, now seen corresponding path program 2 times [2022-04-06 18:49:08,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:08,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872395411] [2022-04-06 18:49:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:08,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:08,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:08,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:08,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:08,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 18:49:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:08,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:08,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:08,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:08,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:08,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872395411] [2022-04-06 18:49:08,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872395411] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:08,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:08,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:08,708 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:08,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2014869152] [2022-04-06 18:49:08,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2014869152] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:08,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:08,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:08,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384285324] [2022-04-06 18:49:08,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:08,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:49:08,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:08,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:49:08,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:08,710 INFO L87 Difference]: Start difference. First operand 298 states and 396 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (13), 8 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 18:49:09,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:09,093 INFO L93 Difference]: Finished difference Result 591 states and 822 transitions. [2022-04-06 18:49:09,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:49:09,093 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (13), 8 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2022-04-06 18:49:09,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:09,095 INFO L225 Difference]: With dead ends: 591 [2022-04-06 18:49:09,096 INFO L226 Difference]: Without dead ends: 330 [2022-04-06 18:49:09,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:49:09,098 INFO L913 BasicCegarLoop]: 214 mSDtfsCounter, 183 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:09,098 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 1020 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 18:49:09,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-04-06 18:49:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 303. [2022-04-06 18:49:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 218 states have (on average 1.261467889908257) internal successors, (275), 224 states have internal predecessors, (275), 55 states have call successors, (55), 28 states have call predecessors, (55), 29 states have return successors, (79), 51 states have call predecessors, (79), 50 states have call successors, (79) [2022-04-06 18:49:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 409 transitions. [2022-04-06 18:49:09,167 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 409 transitions. Word has length 69 [2022-04-06 18:49:09,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:09,167 INFO L478 AbstractCegarLoop]: Abstraction has 303 states and 409 transitions. [2022-04-06 18:49:09,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (13), 8 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 18:49:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 409 transitions. [2022-04-06 18:49:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 18:49:09,168 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:09,168 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] [2022-04-06 18:49:09,168 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-04-06 18:49:09,168 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:09,168 INFO L85 PathProgramCache]: Analyzing trace with hash 437736013, now seen corresponding path program 1 times [2022-04-06 18:49:09,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:09,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1435571360] [2022-04-06 18:49:09,169 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:09,169 INFO L85 PathProgramCache]: Analyzing trace with hash 437736013, now seen corresponding path program 2 times [2022-04-06 18:49:09,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:09,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864614587] [2022-04-06 18:49:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:09,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 18:49:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:09,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:09,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864614587] [2022-04-06 18:49:09,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864614587] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:09,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:09,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:49:09,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:09,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1435571360] [2022-04-06 18:49:09,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1435571360] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:09,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:09,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:49:09,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213305272] [2022-04-06 18:49:09,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:09,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:49:09,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:09,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:49:09,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-04-06 18:49:09,313 INFO L87 Difference]: Start difference. First operand 303 states and 409 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (13), 8 states have call predecessors, (13), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 18:49:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:09,739 INFO L93 Difference]: Finished difference Result 477 states and 678 transitions. [2022-04-06 18:49:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:49:09,739 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (13), 8 states have call predecessors, (13), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2022-04-06 18:49:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:09,742 INFO L225 Difference]: With dead ends: 477 [2022-04-06 18:49:09,742 INFO L226 Difference]: Without dead ends: 474 [2022-04-06 18:49:09,743 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:09,743 INFO L913 BasicCegarLoop]: 306 mSDtfsCounter, 283 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:09,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 755 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 18:49:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-04-06 18:49:09,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 307. [2022-04-06 18:49:09,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 222 states have (on average 1.2657657657657657) internal successors, (281), 228 states have internal predecessors, (281), 55 states have call successors, (55), 28 states have call predecessors, (55), 29 states have return successors, (79), 51 states have call predecessors, (79), 50 states have call successors, (79) [2022-04-06 18:49:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 415 transitions. [2022-04-06 18:49:09,817 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 415 transitions. Word has length 69 [2022-04-06 18:49:09,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:09,817 INFO L478 AbstractCegarLoop]: Abstraction has 307 states and 415 transitions. [2022-04-06 18:49:09,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (13), 8 states have call predecessors, (13), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 18:49:09,817 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 415 transitions. [2022-04-06 18:49:09,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 18:49:09,818 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:09,818 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] [2022-04-06 18:49:09,818 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-04-06 18:49:09,818 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:09,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:09,819 INFO L85 PathProgramCache]: Analyzing trace with hash 447050566, now seen corresponding path program 1 times [2022-04-06 18:49:09,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:09,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [359228887] [2022-04-06 18:49:09,819 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:09,819 INFO L85 PathProgramCache]: Analyzing trace with hash 447050566, now seen corresponding path program 2 times [2022-04-06 18:49:09,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:09,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868949865] [2022-04-06 18:49:09,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:09,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 18:49:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:09,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:09,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868949865] [2022-04-06 18:49:09,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868949865] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:09,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:09,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:49:09,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:09,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [359228887] [2022-04-06 18:49:09,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [359228887] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:09,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:09,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:49:09,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647774921] [2022-04-06 18:49:09,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:09,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:49:09,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:09,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:49:09,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-04-06 18:49:09,980 INFO L87 Difference]: Start difference. First operand 307 states and 415 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:49:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:10,549 INFO L93 Difference]: Finished difference Result 793 states and 1161 transitions. [2022-04-06 18:49:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:49:10,550 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-04-06 18:49:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:10,555 INFO L225 Difference]: With dead ends: 793 [2022-04-06 18:49:10,555 INFO L226 Difference]: Without dead ends: 529 [2022-04-06 18:49:10,557 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 [2022-04-06 18:49:10,558 INFO L913 BasicCegarLoop]: 233 mSDtfsCounter, 493 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:10,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:49:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-04-06 18:49:10,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 490. [2022-04-06 18:49:10,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 357 states have (on average 1.2913165266106443) internal successors, (461), 366 states have internal predecessors, (461), 89 states have call successors, (89), 35 states have call predecessors, (89), 43 states have return successors, (153), 89 states have call predecessors, (153), 85 states have call successors, (153) [2022-04-06 18:49:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 703 transitions. [2022-04-06 18:49:10,692 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 703 transitions. Word has length 70 [2022-04-06 18:49:10,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:10,692 INFO L478 AbstractCegarLoop]: Abstraction has 490 states and 703 transitions. [2022-04-06 18:49:10,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:49:10,692 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 703 transitions. [2022-04-06 18:49:10,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 18:49:10,693 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:10,693 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] [2022-04-06 18:49:10,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-04-06 18:49:10,694 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:10,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1436145557, now seen corresponding path program 1 times [2022-04-06 18:49:10,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:10,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1918112081] [2022-04-06 18:49:10,694 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:10,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1436145557, now seen corresponding path program 2 times [2022-04-06 18:49:10,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:10,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7405567] [2022-04-06 18:49:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:10,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:10,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:10,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:10,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:10,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 18:49:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:10,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:10,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:10,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:10,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:10,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:10,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7405567] [2022-04-06 18:49:10,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7405567] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:10,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:10,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:10,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:10,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1918112081] [2022-04-06 18:49:10,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1918112081] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:10,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:10,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:10,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86539698] [2022-04-06 18:49:10,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:10,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:49:10,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:10,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:49:10,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:49:10,925 INFO L87 Difference]: Start difference. First operand 490 states and 703 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 18:49:11,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:11,441 INFO L93 Difference]: Finished difference Result 942 states and 1393 transitions. [2022-04-06 18:49:11,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:49:11,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 72 [2022-04-06 18:49:11,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:11,446 INFO L225 Difference]: With dead ends: 942 [2022-04-06 18:49:11,446 INFO L226 Difference]: Without dead ends: 493 [2022-04-06 18:49:11,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:49:11,449 INFO L913 BasicCegarLoop]: 227 mSDtfsCounter, 107 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:11,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 1121 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:49:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-04-06 18:49:11,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 484. [2022-04-06 18:49:11,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 353 states have (on average 1.2832861189801699) internal successors, (453), 361 states have internal predecessors, (453), 88 states have call successors, (88), 35 states have call predecessors, (88), 42 states have return successors, (146), 88 states have call predecessors, (146), 84 states have call successors, (146) [2022-04-06 18:49:11,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 687 transitions. [2022-04-06 18:49:11,566 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 687 transitions. Word has length 72 [2022-04-06 18:49:11,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:11,568 INFO L478 AbstractCegarLoop]: Abstraction has 484 states and 687 transitions. [2022-04-06 18:49:11,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 18:49:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 687 transitions. [2022-04-06 18:49:11,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 18:49:11,569 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:11,569 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] [2022-04-06 18:49:11,569 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-04-06 18:49:11,569 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:11,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:11,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1927869214, now seen corresponding path program 1 times [2022-04-06 18:49:11,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:11,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2111350534] [2022-04-06 18:49:11,570 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:11,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1927869214, now seen corresponding path program 2 times [2022-04-06 18:49:11,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:11,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380160907] [2022-04-06 18:49:11,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:11,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 18:49:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 18:49:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:11,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:11,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380160907] [2022-04-06 18:49:11,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380160907] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:11,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:11,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:11,763 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:11,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2111350534] [2022-04-06 18:49:11,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2111350534] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:11,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:11,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:11,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008958968] [2022-04-06 18:49:11,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:11,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:49:11,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:11,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:49:11,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:11,764 INFO L87 Difference]: Start difference. First operand 484 states and 687 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (14), 10 states have call predecessors, (14), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 18:49:12,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:12,373 INFO L93 Difference]: Finished difference Result 869 states and 1255 transitions. [2022-04-06 18:49:12,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:49:12,373 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (14), 10 states have call predecessors, (14), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2022-04-06 18:49:12,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:12,376 INFO L225 Difference]: With dead ends: 869 [2022-04-06 18:49:12,377 INFO L226 Difference]: Without dead ends: 450 [2022-04-06 18:49:12,379 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-04-06 18:49:12,379 INFO L913 BasicCegarLoop]: 313 mSDtfsCounter, 337 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:12,379 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 956 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:49:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-04-06 18:49:12,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 436. [2022-04-06 18:49:12,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 320 states have (on average 1.296875) internal successors, (415), 329 states have internal predecessors, (415), 79 states have call successors, (79), 33 states have call predecessors, (79), 36 states have return successors, (110), 74 states have call predecessors, (110), 75 states have call successors, (110) [2022-04-06 18:49:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 604 transitions. [2022-04-06 18:49:12,477 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 604 transitions. Word has length 83 [2022-04-06 18:49:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:12,478 INFO L478 AbstractCegarLoop]: Abstraction has 436 states and 604 transitions. [2022-04-06 18:49:12,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (14), 10 states have call predecessors, (14), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 18:49:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 604 transitions. [2022-04-06 18:49:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 18:49:12,479 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:12,479 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] [2022-04-06 18:49:12,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-04-06 18:49:12,479 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:12,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:12,479 INFO L85 PathProgramCache]: Analyzing trace with hash -770629812, now seen corresponding path program 1 times [2022-04-06 18:49:12,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:12,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1933815652] [2022-04-06 18:49:12,480 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:12,480 INFO L85 PathProgramCache]: Analyzing trace with hash -770629812, now seen corresponding path program 2 times [2022-04-06 18:49:12,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:12,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182775114] [2022-04-06 18:49:12,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:12,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:49:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 18:49:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:12,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:12,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182775114] [2022-04-06 18:49:12,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182775114] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:12,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:12,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 18:49:12,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:12,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1933815652] [2022-04-06 18:49:12,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1933815652] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:12,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:12,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 18:49:12,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155068042] [2022-04-06 18:49:12,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:12,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 18:49:12,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:12,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 18:49:12,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-04-06 18:49:12,840 INFO L87 Difference]: Start difference. First operand 436 states and 604 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (13), 10 states have call predecessors, (13), 5 states have return successors, (11), 6 states have call predecessors, (11), 2 states have call successors, (11) [2022-04-06 18:49:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:13,557 INFO L93 Difference]: Finished difference Result 486 states and 681 transitions. [2022-04-06 18:49:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:49:13,557 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (13), 10 states have call predecessors, (13), 5 states have return successors, (11), 6 states have call predecessors, (11), 2 states have call successors, (11) Word has length 92 [2022-04-06 18:49:13,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:13,560 INFO L225 Difference]: With dead ends: 486 [2022-04-06 18:49:13,560 INFO L226 Difference]: Without dead ends: 461 [2022-04-06 18:49:13,560 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-04-06 18:49:13,561 INFO L913 BasicCegarLoop]: 237 mSDtfsCounter, 147 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 2664 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:13,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 2664 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 18:49:13,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-04-06 18:49:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 447. [2022-04-06 18:49:13,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 329 states have (on average 1.2887537993920972) internal successors, (424), 339 states have internal predecessors, (424), 79 states have call successors, (79), 33 states have call predecessors, (79), 38 states have return successors, (116), 75 states have call predecessors, (116), 75 states have call successors, (116) [2022-04-06 18:49:13,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 619 transitions. [2022-04-06 18:49:13,665 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 619 transitions. Word has length 92 [2022-04-06 18:49:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:13,666 INFO L478 AbstractCegarLoop]: Abstraction has 447 states and 619 transitions. [2022-04-06 18:49:13,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (13), 10 states have call predecessors, (13), 5 states have return successors, (11), 6 states have call predecessors, (11), 2 states have call successors, (11) [2022-04-06 18:49:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 619 transitions. [2022-04-06 18:49:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 18:49:13,667 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:13,667 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] [2022-04-06 18:49:13,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-04-06 18:49:13,668 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:13,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:13,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1033506351, now seen corresponding path program 1 times [2022-04-06 18:49:13,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:13,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [339202473] [2022-04-06 18:49:13,668 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:13,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1033506351, now seen corresponding path program 2 times [2022-04-06 18:49:13,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:13,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877308032] [2022-04-06 18:49:13,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:13,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:13,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:13,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:13,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:13,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:49:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:13,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:13,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 18:49:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:14,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:14,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877308032] [2022-04-06 18:49:14,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877308032] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:14,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:14,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 18:49:14,128 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:14,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [339202473] [2022-04-06 18:49:14,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [339202473] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:14,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:14,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 18:49:14,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304364129] [2022-04-06 18:49:14,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:14,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 18:49:14,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:14,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 18:49:14,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-04-06 18:49:14,130 INFO L87 Difference]: Start difference. First operand 447 states and 619 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (13), 10 states have call predecessors, (13), 5 states have return successors, (11), 6 states have call predecessors, (11), 2 states have call successors, (11) [2022-04-06 18:49:14,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:14,946 INFO L93 Difference]: Finished difference Result 484 states and 677 transitions. [2022-04-06 18:49:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:49:14,947 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (13), 10 states have call predecessors, (13), 5 states have return successors, (11), 6 states have call predecessors, (11), 2 states have call successors, (11) Word has length 93 [2022-04-06 18:49:14,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:14,949 INFO L225 Difference]: With dead ends: 484 [2022-04-06 18:49:14,949 INFO L226 Difference]: Without dead ends: 459 [2022-04-06 18:49:14,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-04-06 18:49:14,950 INFO L913 BasicCegarLoop]: 245 mSDtfsCounter, 121 mSDsluCounter, 2571 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 2816 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:14,951 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 2816 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:49:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-04-06 18:49:15,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 434. [2022-04-06 18:49:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 319 states have (on average 1.297805642633229) internal successors, (414), 328 states have internal predecessors, (414), 78 states have call successors, (78), 33 states have call predecessors, (78), 36 states have return successors, (108), 73 states have call predecessors, (108), 74 states have call successors, (108) [2022-04-06 18:49:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 600 transitions. [2022-04-06 18:49:15,056 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 600 transitions. Word has length 93 [2022-04-06 18:49:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:15,056 INFO L478 AbstractCegarLoop]: Abstraction has 434 states and 600 transitions. [2022-04-06 18:49:15,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (13), 10 states have call predecessors, (13), 5 states have return successors, (11), 6 states have call predecessors, (11), 2 states have call successors, (11) [2022-04-06 18:49:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 600 transitions. [2022-04-06 18:49:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 18:49:15,058 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:15,058 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] [2022-04-06 18:49:15,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-04-06 18:49:15,059 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:15,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:15,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1724660735, now seen corresponding path program 1 times [2022-04-06 18:49:15,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:15,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [869600634] [2022-04-06 18:49:15,060 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:15,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1724660735, now seen corresponding path program 2 times [2022-04-06 18:49:15,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:15,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10763946] [2022-04-06 18:49:15,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:15,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:15,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:15,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:15,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:15,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:49:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:15,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:15,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:15,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:15,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:15,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:15,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:15,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 18:49:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:15,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 18:49:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:15,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:15,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10763946] [2022-04-06 18:49:15,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10763946] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:15,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:15,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 18:49:15,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:15,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [869600634] [2022-04-06 18:49:15,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [869600634] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:15,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:15,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 18:49:15,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100029646] [2022-04-06 18:49:15,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:15,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 18:49:15,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:15,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 18:49:15,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-04-06 18:49:15,503 INFO L87 Difference]: Start difference. First operand 434 states and 600 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 11 states have internal predecessors, (77), 5 states have call successors, (14), 11 states have call predecessors, (14), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 18:49:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:17,153 INFO L93 Difference]: Finished difference Result 470 states and 642 transitions. [2022-04-06 18:49:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 18:49:17,153 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 11 states have internal predecessors, (77), 5 states have call successors, (14), 11 states have call predecessors, (14), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2022-04-06 18:49:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:17,156 INFO L225 Difference]: With dead ends: 470 [2022-04-06 18:49:17,156 INFO L226 Difference]: Without dead ends: 434 [2022-04-06 18:49:17,157 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=1357, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 18:49:17,157 INFO L913 BasicCegarLoop]: 210 mSDtfsCounter, 395 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 2919 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 3168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:17,157 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 810 Invalid, 3168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2919 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 18:49:17,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-04-06 18:49:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2022-04-06 18:49:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 313 states have (on average 1.3003194888178913) internal successors, (407), 322 states have internal predecessors, (407), 75 states have call successors, (75), 32 states have call predecessors, (75), 35 states have return successors, (105), 70 states have call predecessors, (105), 71 states have call successors, (105) [2022-04-06 18:49:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 587 transitions. [2022-04-06 18:49:17,256 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 587 transitions. Word has length 103 [2022-04-06 18:49:17,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:17,257 INFO L478 AbstractCegarLoop]: Abstraction has 424 states and 587 transitions. [2022-04-06 18:49:17,257 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 11 states have internal predecessors, (77), 5 states have call successors, (14), 11 states have call predecessors, (14), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 18:49:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 587 transitions. [2022-04-06 18:49:17,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-06 18:49:17,258 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:17,258 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] [2022-04-06 18:49:17,258 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-04-06 18:49:17,259 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:17,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:17,259 INFO L85 PathProgramCache]: Analyzing trace with hash 56143006, now seen corresponding path program 1 times [2022-04-06 18:49:17,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:17,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1134178145] [2022-04-06 18:49:17,259 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:17,259 INFO L85 PathProgramCache]: Analyzing trace with hash 56143006, now seen corresponding path program 2 times [2022-04-06 18:49:17,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:17,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974317336] [2022-04-06 18:49:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:17,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:49:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 18:49:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 18:49:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 18:49:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:17,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:17,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974317336] [2022-04-06 18:49:17,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974317336] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:17,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:17,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 18:49:17,739 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:17,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1134178145] [2022-04-06 18:49:17,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1134178145] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:17,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:17,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 18:49:17,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872789271] [2022-04-06 18:49:17,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:17,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 18:49:17,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:17,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 18:49:17,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-04-06 18:49:17,740 INFO L87 Difference]: Start difference. First operand 424 states and 587 transitions. Second operand has 25 states, 25 states have (on average 3.12) internal successors, (78), 11 states have internal predecessors, (78), 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) [2022-04-06 18:49:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:18,960 INFO L93 Difference]: Finished difference Result 481 states and 679 transitions. [2022-04-06 18:49:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 18:49:18,960 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 11 states have internal predecessors, (78), 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 108 [2022-04-06 18:49:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:18,964 INFO L225 Difference]: With dead ends: 481 [2022-04-06 18:49:18,964 INFO L226 Difference]: Without dead ends: 454 [2022-04-06 18:49:18,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 18:49:18,966 INFO L913 BasicCegarLoop]: 200 mSDtfsCounter, 121 mSDsluCounter, 1945 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 2145 SdHoareTripleChecker+Invalid, 2220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:18,966 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 2145 Invalid, 2220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2159 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 18:49:18,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-04-06 18:49:19,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 440. [2022-04-06 18:49:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 324 states have (on average 1.2901234567901234) internal successors, (418), 334 states have internal predecessors, (418), 78 states have call successors, (78), 32 states have call predecessors, (78), 37 states have return successors, (114), 74 states have call predecessors, (114), 73 states have call successors, (114) [2022-04-06 18:49:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 610 transitions. [2022-04-06 18:49:19,083 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 610 transitions. Word has length 108 [2022-04-06 18:49:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:19,084 INFO L478 AbstractCegarLoop]: Abstraction has 440 states and 610 transitions. [2022-04-06 18:49:19,084 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 11 states have internal predecessors, (78), 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) [2022-04-06 18:49:19,084 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 610 transitions. [2022-04-06 18:49:19,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 18:49:19,106 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:19,107 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] [2022-04-06 18:49:19,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-04-06 18:49:19,107 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:19,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:19,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1819064313, now seen corresponding path program 1 times [2022-04-06 18:49:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:19,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [739526304] [2022-04-06 18:49:19,108 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1819064313, now seen corresponding path program 2 times [2022-04-06 18:49:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:19,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940888845] [2022-04-06 18:49:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:19,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:49:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 18:49:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 18:49:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 18:49:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:19,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:19,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940888845] [2022-04-06 18:49:19,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940888845] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:19,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:19,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 18:49:19,547 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:19,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [739526304] [2022-04-06 18:49:19,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [739526304] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:19,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:19,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 18:49:19,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734779582] [2022-04-06 18:49:19,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:19,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 18:49:19,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:19,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 18:49:19,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-04-06 18:49:19,550 INFO L87 Difference]: Start difference. First operand 440 states and 610 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 11 states have internal predecessors, (79), 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) [2022-04-06 18:49:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:20,469 INFO L93 Difference]: Finished difference Result 483 states and 677 transitions. [2022-04-06 18:49:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 18:49:20,469 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 11 states have internal predecessors, (79), 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 109 [2022-04-06 18:49:20,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:20,471 INFO L225 Difference]: With dead ends: 483 [2022-04-06 18:49:20,471 INFO L226 Difference]: Without dead ends: 443 [2022-04-06 18:49:20,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 18:49:20,472 INFO L913 BasicCegarLoop]: 238 mSDtfsCounter, 199 mSDsluCounter, 2304 mSDsCounter, 0 mSdLazyCounter, 1850 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 2542 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:20,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 2542 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1850 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:49:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-04-06 18:49:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 413. [2022-04-06 18:49:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 304 states have (on average 1.2664473684210527) internal successors, (385), 312 states have internal predecessors, (385), 75 states have call successors, (75), 32 states have call predecessors, (75), 33 states have return successors, (97), 69 states have call predecessors, (97), 70 states have call successors, (97) [2022-04-06 18:49:20,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 557 transitions. [2022-04-06 18:49:20,573 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 557 transitions. Word has length 109 [2022-04-06 18:49:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:20,574 INFO L478 AbstractCegarLoop]: Abstraction has 413 states and 557 transitions. [2022-04-06 18:49:20,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 11 states have internal predecessors, (79), 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) [2022-04-06 18:49:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 557 transitions. [2022-04-06 18:49:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 18:49:20,575 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:20,575 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:49:20,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-04-06 18:49:20,575 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:20,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:20,576 INFO L85 PathProgramCache]: Analyzing trace with hash -636706815, now seen corresponding path program 1 times [2022-04-06 18:49:20,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:20,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [193985678] [2022-04-06 18:49:20,576 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:20,577 INFO L85 PathProgramCache]: Analyzing trace with hash -636706815, now seen corresponding path program 2 times [2022-04-06 18:49:20,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:20,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701792712] [2022-04-06 18:49:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:20,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 18:49:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 18:49:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 18:49:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:49:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 18:49:20,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:20,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701792712] [2022-04-06 18:49:20,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701792712] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:20,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:20,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:49:20,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:20,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [193985678] [2022-04-06 18:49:20,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [193985678] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:20,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:20,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:49:20,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641322774] [2022-04-06 18:49:20,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:20,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:49:20,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:20,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:49:20,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:49:20,794 INFO L87 Difference]: Start difference. First operand 413 states and 557 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (17), 11 states have call predecessors, (17), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-04-06 18:49:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:21,395 INFO L93 Difference]: Finished difference Result 734 states and 984 transitions. [2022-04-06 18:49:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:49:21,396 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (17), 11 states have call predecessors, (17), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 121 [2022-04-06 18:49:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:21,398 INFO L225 Difference]: With dead ends: 734 [2022-04-06 18:49:21,399 INFO L226 Difference]: Without dead ends: 420 [2022-04-06 18:49:21,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:49:21,400 INFO L913 BasicCegarLoop]: 217 mSDtfsCounter, 99 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:21,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1131 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 18:49:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-04-06 18:49:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 408. [2022-04-06 18:49:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 302 states have (on average 1.2483443708609272) internal successors, (377), 309 states have internal predecessors, (377), 71 states have call successors, (71), 32 states have call predecessors, (71), 34 states have return successors, (92), 67 states have call predecessors, (92), 66 states have call successors, (92) [2022-04-06 18:49:21,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 540 transitions. [2022-04-06 18:49:21,513 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 540 transitions. Word has length 121 [2022-04-06 18:49:21,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:21,513 INFO L478 AbstractCegarLoop]: Abstraction has 408 states and 540 transitions. [2022-04-06 18:49:21,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (17), 11 states have call predecessors, (17), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-04-06 18:49:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 540 transitions. [2022-04-06 18:49:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 18:49:21,515 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:21,515 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:49:21,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-04-06 18:49:21,515 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:21,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:21,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1406877123, now seen corresponding path program 1 times [2022-04-06 18:49:21,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:21,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1274832195] [2022-04-06 18:49:21,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:21,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1406877123, now seen corresponding path program 2 times [2022-04-06 18:49:21,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:21,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132993715] [2022-04-06 18:49:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:21,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 18:49:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 18:49:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 18:49:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:49:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 18:49:21,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:21,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132993715] [2022-04-06 18:49:21,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132993715] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:21,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:21,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:49:21,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:21,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1274832195] [2022-04-06 18:49:21,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1274832195] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:21,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:21,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:49:21,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026348380] [2022-04-06 18:49:21,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:21,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:49:21,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:21,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:49:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:49:21,761 INFO L87 Difference]: Start difference. First operand 408 states and 540 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (17), 11 states have call predecessors, (17), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-04-06 18:49:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:22,346 INFO L93 Difference]: Finished difference Result 592 states and 836 transitions. [2022-04-06 18:49:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:49:22,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (17), 11 states have call predecessors, (17), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 122 [2022-04-06 18:49:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:22,350 INFO L225 Difference]: With dead ends: 592 [2022-04-06 18:49:22,350 INFO L226 Difference]: Without dead ends: 547 [2022-04-06 18:49:22,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:49:22,351 INFO L913 BasicCegarLoop]: 255 mSDtfsCounter, 217 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:22,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1249 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:49:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-04-06 18:49:22,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 399. [2022-04-06 18:49:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 294 states have (on average 1.248299319727891) internal successors, (367), 301 states have internal predecessors, (367), 71 states have call successors, (71), 32 states have call predecessors, (71), 33 states have return successors, (91), 66 states have call predecessors, (91), 66 states have call successors, (91) [2022-04-06 18:49:22,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 529 transitions. [2022-04-06 18:49:22,437 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 529 transitions. Word has length 122 [2022-04-06 18:49:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:22,438 INFO L478 AbstractCegarLoop]: Abstraction has 399 states and 529 transitions. [2022-04-06 18:49:22,438 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (17), 11 states have call predecessors, (17), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-04-06 18:49:22,438 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 529 transitions. [2022-04-06 18:49:22,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 18:49:22,439 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:22,439 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] [2022-04-06 18:49:22,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-04-06 18:49:22,439 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:22,440 INFO L85 PathProgramCache]: Analyzing trace with hash 359745241, now seen corresponding path program 1 times [2022-04-06 18:49:22,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:22,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1327443029] [2022-04-06 18:49:22,440 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:22,440 INFO L85 PathProgramCache]: Analyzing trace with hash 359745241, now seen corresponding path program 2 times [2022-04-06 18:49:22,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:22,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029341604] [2022-04-06 18:49:22,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:22,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:49:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 18:49:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 18:49:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 18:49:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 18:49:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:22,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:22,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029341604] [2022-04-06 18:49:22,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029341604] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:22,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:22,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 18:49:22,927 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:22,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1327443029] [2022-04-06 18:49:22,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1327443029] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:22,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:22,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 18:49:22,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520537254] [2022-04-06 18:49:22,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:22,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 18:49:22,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:22,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 18:49:22,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-04-06 18:49:22,930 INFO L87 Difference]: Start difference. First operand 399 states and 529 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 11 states have internal predecessors, (87), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 18:49:24,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:24,279 INFO L93 Difference]: Finished difference Result 416 states and 551 transitions. [2022-04-06 18:49:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 18:49:24,279 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 11 states have internal predecessors, (87), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 119 [2022-04-06 18:49:24,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:24,281 INFO L225 Difference]: With dead ends: 416 [2022-04-06 18:49:24,281 INFO L226 Difference]: Without dead ends: 354 [2022-04-06 18:49:24,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=1718, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 18:49:24,283 INFO L913 BasicCegarLoop]: 178 mSDtfsCounter, 476 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 2616 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 2616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:24,284 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 481 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 2616 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:49:24,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-04-06 18:49:24,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 341. [2022-04-06 18:49:24,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 250 states have (on average 1.18) internal successors, (295), 255 states have internal predecessors, (295), 64 states have call successors, (64), 29 states have call predecessors, (64), 26 states have return successors, (77), 56 states have call predecessors, (77), 58 states have call successors, (77) [2022-04-06 18:49:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 436 transitions. [2022-04-06 18:49:24,401 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 436 transitions. Word has length 119 [2022-04-06 18:49:24,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:24,401 INFO L478 AbstractCegarLoop]: Abstraction has 341 states and 436 transitions. [2022-04-06 18:49:24,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 11 states have internal predecessors, (87), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 18:49:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 436 transitions. [2022-04-06 18:49:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 18:49:24,402 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:24,402 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-04-06 18:49:24,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-04-06 18:49:24,403 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:24,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1772031017, now seen corresponding path program 1 times [2022-04-06 18:49:24,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:24,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [312224869] [2022-04-06 18:49:24,404 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:24,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1772031017, now seen corresponding path program 2 times [2022-04-06 18:49:24,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:24,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130511791] [2022-04-06 18:49:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:24,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 18:49:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 18:49:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 18:49:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:49:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 18:49:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 18:49:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-04-06 18:49:24,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:24,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130511791] [2022-04-06 18:49:24,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130511791] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:49:24,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487911939] [2022-04-06 18:49:24,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:49:24,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:49:24,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:49:24,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:49:24,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 18:49:24,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 18:49:24,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:49:24,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 18:49:24,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:49:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-04-06 18:49:25,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:49:25,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487911939] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:25,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:49:25,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 19 [2022-04-06 18:49:25,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:25,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [312224869] [2022-04-06 18:49:25,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [312224869] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:25,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:25,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:49:25,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708616613] [2022-04-06 18:49:25,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:25,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:49:25,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:25,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:49:25,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:49:25,190 INFO L87 Difference]: Start difference. First operand 341 states and 436 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2022-04-06 18:49:25,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:25,335 INFO L93 Difference]: Finished difference Result 373 states and 477 transitions. [2022-04-06 18:49:25,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:49:25,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) Word has length 163 [2022-04-06 18:49:25,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:25,338 INFO L225 Difference]: With dead ends: 373 [2022-04-06 18:49:25,338 INFO L226 Difference]: Without dead ends: 362 [2022-04-06 18:49:25,338 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:49:25,339 INFO L913 BasicCegarLoop]: 196 mSDtfsCounter, 14 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:25,339 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 927 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:49:25,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-04-06 18:49:25,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 343. [2022-04-06 18:49:25,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 252 states have (on average 1.1785714285714286) internal successors, (297), 257 states have internal predecessors, (297), 64 states have call successors, (64), 29 states have call predecessors, (64), 26 states have return successors, (77), 56 states have call predecessors, (77), 58 states have call successors, (77) [2022-04-06 18:49:25,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 438 transitions. [2022-04-06 18:49:25,434 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 438 transitions. Word has length 163 [2022-04-06 18:49:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:25,434 INFO L478 AbstractCegarLoop]: Abstraction has 343 states and 438 transitions. [2022-04-06 18:49:25,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2022-04-06 18:49:25,434 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 438 transitions. [2022-04-06 18:49:25,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 18:49:25,436 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:25,436 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-04-06 18:49:25,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 18:49:25,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:49:25,652 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:25,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:25,652 INFO L85 PathProgramCache]: Analyzing trace with hash 422140520, now seen corresponding path program 1 times [2022-04-06 18:49:25,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:25,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1269368681] [2022-04-06 18:49:25,653 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:25,653 INFO L85 PathProgramCache]: Analyzing trace with hash 422140520, now seen corresponding path program 2 times [2022-04-06 18:49:25,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:25,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033120849] [2022-04-06 18:49:25,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:25,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 18:49:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 18:49:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 18:49:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:49:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 18:49:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 18:49:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-04-06 18:49:25,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:25,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033120849] [2022-04-06 18:49:25,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033120849] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:49:25,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418699572] [2022-04-06 18:49:25,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:49:25,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:49:25,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:49:25,960 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:49:25,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 18:49:26,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 18:49:26,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:49:26,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 18:49:26,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:49:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-04-06 18:49:26,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:49:26,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418699572] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:26,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:49:26,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 19 [2022-04-06 18:49:26,422 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:26,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1269368681] [2022-04-06 18:49:26,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1269368681] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:26,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:26,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:49:26,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276181879] [2022-04-06 18:49:26,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:26,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:49:26,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:26,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:49:26,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:49:26,424 INFO L87 Difference]: Start difference. First operand 343 states and 438 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2022-04-06 18:49:26,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:26,550 INFO L93 Difference]: Finished difference Result 611 states and 782 transitions. [2022-04-06 18:49:26,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:49:26,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) Word has length 163 [2022-04-06 18:49:26,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:26,552 INFO L225 Difference]: With dead ends: 611 [2022-04-06 18:49:26,552 INFO L226 Difference]: Without dead ends: 398 [2022-04-06 18:49:26,553 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:49:26,554 INFO L913 BasicCegarLoop]: 218 mSDtfsCounter, 30 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:26,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1031 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:49:26,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-04-06 18:49:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 325. [2022-04-06 18:49:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 238 states have (on average 1.1554621848739495) internal successors, (275), 242 states have internal predecessors, (275), 60 states have call successors, (60), 29 states have call predecessors, (60), 26 states have return successors, (71), 53 states have call predecessors, (71), 54 states have call successors, (71) [2022-04-06 18:49:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 406 transitions. [2022-04-06 18:49:26,646 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 406 transitions. Word has length 163 [2022-04-06 18:49:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:26,646 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 406 transitions. [2022-04-06 18:49:26,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2022-04-06 18:49:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 406 transitions. [2022-04-06 18:49:26,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-04-06 18:49:26,648 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:26,648 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:49:26,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 18:49:26,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-04-06 18:49:26,863 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:26,863 INFO L85 PathProgramCache]: Analyzing trace with hash 674044285, now seen corresponding path program 1 times [2022-04-06 18:49:26,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:26,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [907575831] [2022-04-06 18:49:26,864 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash 674044285, now seen corresponding path program 2 times [2022-04-06 18:49:26,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:26,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591666983] [2022-04-06 18:49:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:26,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:26,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:26,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:26,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:26,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 18:49:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 18:49:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 18:49:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:49:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 18:49:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 18:49:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 18:49:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 18:49:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-04-06 18:49:27,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:27,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591666983] [2022-04-06 18:49:27,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591666983] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:49:27,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191532355] [2022-04-06 18:49:27,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:49:27,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:49:27,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:49:27,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:49:27,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 18:49:27,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 18:49:27,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:49:27,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 18:49:27,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:49:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-04-06 18:49:27,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:49:27,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191532355] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:27,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:49:27,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 19 [2022-04-06 18:49:27,698 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:27,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [907575831] [2022-04-06 18:49:27,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [907575831] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:27,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:27,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:49:27,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186559707] [2022-04-06 18:49:27,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:27,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:49:27,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:27,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:49:27,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:49:27,699 INFO L87 Difference]: Start difference. First operand 325 states and 406 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-04-06 18:49:27,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:27,855 INFO L93 Difference]: Finished difference Result 343 states and 425 transitions. [2022-04-06 18:49:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:49:27,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 203 [2022-04-06 18:49:27,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:27,857 INFO L225 Difference]: With dead ends: 343 [2022-04-06 18:49:27,857 INFO L226 Difference]: Without dead ends: 332 [2022-04-06 18:49:27,857 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:49:27,858 INFO L913 BasicCegarLoop]: 192 mSDtfsCounter, 8 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:27,859 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 912 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:49:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-04-06 18:49:27,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 325. [2022-04-06 18:49:27,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 238 states have (on average 1.1470588235294117) internal successors, (273), 242 states have internal predecessors, (273), 60 states have call successors, (60), 29 states have call predecessors, (60), 26 states have return successors, (71), 53 states have call predecessors, (71), 54 states have call successors, (71) [2022-04-06 18:49:27,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 404 transitions. [2022-04-06 18:49:27,950 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 404 transitions. Word has length 203 [2022-04-06 18:49:27,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:27,950 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 404 transitions. [2022-04-06 18:49:27,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-04-06 18:49:27,950 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 404 transitions. [2022-04-06 18:49:27,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-04-06 18:49:27,952 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:27,952 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:49:27,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 18:49:28,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:49:28,168 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:28,168 INFO L85 PathProgramCache]: Analyzing trace with hash 2064315717, now seen corresponding path program 1 times [2022-04-06 18:49:28,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:28,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [790688318] [2022-04-06 18:49:28,169 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:28,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2064315717, now seen corresponding path program 2 times [2022-04-06 18:49:28,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:28,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005342830] [2022-04-06 18:49:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:28,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 18:49:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 18:49:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 18:49:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:49:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 18:49:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 18:49:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 18:49:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 18:49:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-04-06 18:49:28,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:28,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005342830] [2022-04-06 18:49:28,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005342830] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:49:28,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414547554] [2022-04-06 18:49:28,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:49:28,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:49:28,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:49:28,460 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:49:28,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 18:49:28,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 18:49:28,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:49:28,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 2 conjunts are in the unsatisfiable core [2022-04-06 18:49:28,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:49:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 18:49:28,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:49:28,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414547554] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:28,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:49:28,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [15] total 16 [2022-04-06 18:49:28,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:28,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [790688318] [2022-04-06 18:49:28,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [790688318] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:28,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:28,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 18:49:28,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113461058] [2022-04-06 18:49:28,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:28,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 18:49:28,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:28,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 18:49:28,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:49:28,905 INFO L87 Difference]: Start difference. First operand 325 states and 404 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-04-06 18:49:28,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:28,997 INFO L93 Difference]: Finished difference Result 350 states and 436 transitions. [2022-04-06 18:49:28,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 18:49:28,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 206 [2022-04-06 18:49:28,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:28,999 INFO L225 Difference]: With dead ends: 350 [2022-04-06 18:49:28,999 INFO L226 Difference]: Without dead ends: 335 [2022-04-06 18:49:28,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:49:28,999 INFO L913 BasicCegarLoop]: 169 mSDtfsCounter, 7 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:29,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 318 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:49:29,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-04-06 18:49:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 329. [2022-04-06 18:49:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 242 states have (on average 1.1446280991735538) internal successors, (277), 246 states have internal predecessors, (277), 60 states have call successors, (60), 29 states have call predecessors, (60), 26 states have return successors, (71), 53 states have call predecessors, (71), 54 states have call successors, (71) [2022-04-06 18:49:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 408 transitions. [2022-04-06 18:49:29,101 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 408 transitions. Word has length 206 [2022-04-06 18:49:29,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:29,101 INFO L478 AbstractCegarLoop]: Abstraction has 329 states and 408 transitions. [2022-04-06 18:49:29,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-04-06 18:49:29,101 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 408 transitions. [2022-04-06 18:49:29,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-04-06 18:49:29,103 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:29,103 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:49:29,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 18:49:29,328 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:49:29,328 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:29,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:29,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1529587001, now seen corresponding path program 1 times [2022-04-06 18:49:29,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:29,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1339227436] [2022-04-06 18:49:29,329 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:29,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1529587001, now seen corresponding path program 2 times [2022-04-06 18:49:29,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:29,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116479982] [2022-04-06 18:49:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:29,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 18:49:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 18:49:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 18:49:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:49:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 18:49:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 18:49:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 18:49:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 18:49:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-04-06 18:49:29,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:29,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116479982] [2022-04-06 18:49:29,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116479982] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:49:29,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670556170] [2022-04-06 18:49:29,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:49:29,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:49:29,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:49:29,644 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:49:29,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 18:49:29,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 18:49:29,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:49:29,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 18:49:29,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:49:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-04-06 18:49:30,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:49:30,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670556170] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:30,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:49:30,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 19 [2022-04-06 18:49:30,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:30,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1339227436] [2022-04-06 18:49:30,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1339227436] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:30,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:30,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:49:30,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669792489] [2022-04-06 18:49:30,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:30,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:49:30,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:30,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:49:30,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:49:30,145 INFO L87 Difference]: Start difference. First operand 329 states and 408 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-04-06 18:49:30,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:30,257 INFO L93 Difference]: Finished difference Result 346 states and 426 transitions. [2022-04-06 18:49:30,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:49:30,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 206 [2022-04-06 18:49:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:30,259 INFO L225 Difference]: With dead ends: 346 [2022-04-06 18:49:30,259 INFO L226 Difference]: Without dead ends: 329 [2022-04-06 18:49:30,260 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:49:30,261 INFO L913 BasicCegarLoop]: 170 mSDtfsCounter, 9 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:30,261 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 820 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:49:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-04-06 18:49:30,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 325. [2022-04-06 18:49:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 238 states have (on average 1.1218487394957983) internal successors, (267), 242 states have internal predecessors, (267), 60 states have call successors, (60), 29 states have call predecessors, (60), 26 states have return successors, (71), 53 states have call predecessors, (71), 54 states have call successors, (71) [2022-04-06 18:49:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 398 transitions. [2022-04-06 18:49:30,354 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 398 transitions. Word has length 206 [2022-04-06 18:49:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:30,354 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 398 transitions. [2022-04-06 18:49:30,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-04-06 18:49:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 398 transitions. [2022-04-06 18:49:30,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-04-06 18:49:30,357 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:30,357 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:49:30,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 18:49:30,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 18:49:30,579 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1534631942, now seen corresponding path program 1 times [2022-04-06 18:49:30,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:30,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [696367449] [2022-04-06 18:49:30,580 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:30,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1534631942, now seen corresponding path program 2 times [2022-04-06 18:49:30,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:30,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089786984] [2022-04-06 18:49:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:30,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 18:49:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 18:49:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 18:49:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:49:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 18:49:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 18:49:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 18:49:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 18:49:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-04-06 18:49:30,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:30,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089786984] [2022-04-06 18:49:30,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089786984] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:49:30,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872712795] [2022-04-06 18:49:30,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:49:30,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:49:30,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:49:30,884 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:49:30,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 18:49:31,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 18:49:31,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:49:31,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 18:49:31,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:49:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-04-06 18:49:31,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:49:31,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872712795] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:31,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:49:31,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 19 [2022-04-06 18:49:31,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:31,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [696367449] [2022-04-06 18:49:31,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [696367449] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:31,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:31,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:49:31,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32360668] [2022-04-06 18:49:31,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:31,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:49:31,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:31,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:49:31,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:49:31,323 INFO L87 Difference]: Start difference. First operand 325 states and 398 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-04-06 18:49:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:31,480 INFO L93 Difference]: Finished difference Result 336 states and 409 transitions. [2022-04-06 18:49:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:49:31,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 206 [2022-04-06 18:49:31,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:31,482 INFO L225 Difference]: With dead ends: 336 [2022-04-06 18:49:31,482 INFO L226 Difference]: Without dead ends: 286 [2022-04-06 18:49:31,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:49:31,482 INFO L913 BasicCegarLoop]: 167 mSDtfsCounter, 2 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:31,483 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 817 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:49:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-04-06 18:49:31,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2022-04-06 18:49:31,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 208 states have (on average 1.0961538461538463) internal successors, (228), 212 states have internal predecessors, (228), 50 states have call successors, (50), 29 states have call predecessors, (50), 26 states have return successors, (54), 43 states have call predecessors, (54), 42 states have call successors, (54) [2022-04-06 18:49:31,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 332 transitions. [2022-04-06 18:49:31,569 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 332 transitions. Word has length 206 [2022-04-06 18:49:31,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:31,569 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 332 transitions. [2022-04-06 18:49:31,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-04-06 18:49:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 332 transitions. [2022-04-06 18:49:31,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-04-06 18:49:31,571 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:31,571 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:49:31,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 18:49:31,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:49:31,795 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:31,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:31,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2063985540, now seen corresponding path program 1 times [2022-04-06 18:49:31,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:31,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [92313783] [2022-04-06 18:49:31,796 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:31,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2063985540, now seen corresponding path program 2 times [2022-04-06 18:49:31,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:31,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849629270] [2022-04-06 18:49:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:31,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 18:49:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 18:49:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 18:49:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:49:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 18:49:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 18:49:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 18:49:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 18:49:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-04-06 18:49:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-04-06 18:49:32,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:32,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849629270] [2022-04-06 18:49:32,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849629270] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:49:32,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778867113] [2022-04-06 18:49:32,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:49:32,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:49:32,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:49:32,076 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:49:32,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 18:49:32,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 18:49:32,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:49:32,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 18:49:32,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:49:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-04-06 18:49:32,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:49:32,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778867113] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:32,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:49:32,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 19 [2022-04-06 18:49:32,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:32,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [92313783] [2022-04-06 18:49:32,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [92313783] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:32,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:32,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:49:32,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104288572] [2022-04-06 18:49:32,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:32,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:49:32,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:32,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:49:32,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:49:32,610 INFO L87 Difference]: Start difference. First operand 285 states and 332 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-04-06 18:49:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:32,682 INFO L93 Difference]: Finished difference Result 287 states and 333 transitions. [2022-04-06 18:49:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:49:32,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 211 [2022-04-06 18:49:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:32,683 INFO L225 Difference]: With dead ends: 287 [2022-04-06 18:49:32,683 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 18:49:32,684 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:49:32,684 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 2 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:32,685 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 688 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:49:32,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 18:49:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 18:49:32,685 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) [2022-04-06 18:49:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 18:49:32,685 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 211 [2022-04-06 18:49:32,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:32,685 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 18:49:32,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-04-06 18:49:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 18:49:32,686 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 18:49:32,688 INFO L788 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 18:49:32,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 18:49:32,888 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:49:32,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 18:51:10,020 WARN L232 SmtUtils]: Spent 1.62m on a formula simplification. DAG size of input: 167 DAG size of output: 162 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 18:51:28,090 WARN L232 SmtUtils]: Spent 18.07s on a formula simplification. DAG size of input: 162 DAG size of output: 157 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 18:53:04,991 WARN L232 SmtUtils]: Spent 1.61m on a formula simplification. DAG size of input: 167 DAG size of output: 162 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 18:53:22,993 WARN L232 SmtUtils]: Spent 18.00s on a formula simplification. DAG size of input: 162 DAG size of output: 157 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 18:54:41,470 WARN L232 SmtUtils]: Spent 1.31m on a formula simplification. DAG size of input: 161 DAG size of output: 158 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 18:54:59,744 WARN L232 SmtUtils]: Spent 18.26s on a formula simplification. DAG size of input: 162 DAG size of output: 157 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 18:55:18,045 WARN L232 SmtUtils]: Spent 18.30s on a formula simplification. DAG size of input: 162 DAG size of output: 157 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 18:56:55,968 WARN L232 SmtUtils]: Spent 1.63m on a formula simplification. DAG size of input: 167 DAG size of output: 162 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 19:01:30,168 WARN L232 SmtUtils]: Spent 4.57m on a formula simplification. DAG size of input: 164 DAG size of output: 161 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)