/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 13:13:55,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 13:13:55,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 13:13:55,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 13:13:55,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 13:13:55,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 13:13:55,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 13:13:55,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 13:13:55,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 13:13:55,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 13:13:55,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 13:13:55,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 13:13:55,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 13:13:55,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 13:13:55,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 13:13:55,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 13:13:55,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 13:13:55,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 13:13:55,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 13:13:55,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 13:13:55,392 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 13:13:55,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 13:13:55,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 13:13:55,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 13:13:55,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 13:13:55,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 13:13:55,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 13:13:55,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 13:13:55,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 13:13:55,406 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 13:13:55,413 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 13:13:55,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 13:13:55,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 13:13:55,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 13:13:55,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 13:13:55,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 13:13:55,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 13:13:55,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 13:13:55,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 13:13:55,416 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 13:13:55,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 13:13:55,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 13:13:55,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 13:13:55,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 13:13:55,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 13:13:55,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 13:13:55,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 13:13:55,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 13:13:55,417 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 13:13:55,417 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 13:13:55,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 13:13:55,417 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 13:13:55,417 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 13:13:55,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 13:13:55,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 13:13:55,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 13:13:55,620 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 13:13:55,621 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 13:13:55,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2022-03-19 13:13:55,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba5f8b77c/a680dd879a214b11a79ba7c890aa69b5/FLAG7e45e8f7d [2022-03-19 13:13:56,124 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 13:13:56,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2022-03-19 13:13:56,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba5f8b77c/a680dd879a214b11a79ba7c890aa69b5/FLAG7e45e8f7d [2022-03-19 13:13:56,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba5f8b77c/a680dd879a214b11a79ba7c890aa69b5 [2022-03-19 13:13:56,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 13:13:56,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 13:13:56,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 13:13:56,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 13:13:56,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 13:13:56,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:13:56" (1/1) ... [2022-03-19 13:13:56,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@99c6be8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:56, skipping insertion in model container [2022-03-19 13:13:56,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:13:56" (1/1) ... [2022-03-19 13:13:56,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 13:13:56,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 13:13:56,315 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c[2713,2726] [2022-03-19 13:13:56,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 13:13:56,395 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 13:13:56,412 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c[2713,2726] [2022-03-19 13:13:56,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 13:13:56,462 INFO L208 MainTranslator]: Completed translation [2022-03-19 13:13:56,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:56 WrapperNode [2022-03-19 13:13:56,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 13:13:56,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 13:13:56,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 13:13:56,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 13:13:56,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:56" (1/1) ... [2022-03-19 13:13:56,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:56" (1/1) ... [2022-03-19 13:13:56,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:56" (1/1) ... [2022-03-19 13:13:56,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:56" (1/1) ... [2022-03-19 13:13:56,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:56" (1/1) ... [2022-03-19 13:13:56,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:56" (1/1) ... [2022-03-19 13:13:56,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:56" (1/1) ... [2022-03-19 13:13:56,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 13:13:56,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 13:13:56,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 13:13:56,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 13:13:56,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:56" (1/1) ... [2022-03-19 13:13:56,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 13:13:56,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 13:13:56,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 13:13:56,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 13:13:56,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 13:13:56,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 13:13:56,612 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 13:13:56,613 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-03-19 13:13:56,613 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-03-19 13:13:56,613 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-03-19 13:13:56,613 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-03-19 13:13:56,613 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-03-19 13:13:56,614 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-03-19 13:13:56,614 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-03-19 13:13:56,614 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-03-19 13:13:56,614 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-03-19 13:13:56,614 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-03-19 13:13:56,615 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 13:13:56,615 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-03-19 13:13:56,616 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-03-19 13:13:56,616 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-03-19 13:13:56,616 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-03-19 13:13:56,616 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-03-19 13:13:56,616 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-03-19 13:13:56,617 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-03-19 13:13:56,617 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-03-19 13:13:56,617 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-03-19 13:13:56,617 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-03-19 13:13:56,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-03-19 13:13:56,617 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-03-19 13:13:56,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-03-19 13:13:56,617 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-03-19 13:13:56,617 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 13:13:56,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 13:13:56,617 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 13:13:56,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 13:13:56,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-19 13:13:56,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 13:13:56,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-03-19 13:13:56,617 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-03-19 13:13:56,617 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-03-19 13:13:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-03-19 13:13:56,619 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-03-19 13:13:56,619 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-03-19 13:13:56,619 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-03-19 13:13:56,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 13:13:56,619 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-03-19 13:13:56,619 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-03-19 13:13:56,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 13:13:56,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 13:13:56,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 13:13:56,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 13:13:56,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 13:13:56,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 13:13:56,751 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 13:13:56,752 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 13:13:56,780 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:13:56,799 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:13:56,799 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:13:56,805 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:13:56,811 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:13:56,811 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:13:56,815 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:13:56,943 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-03-19 13:13:56,943 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-03-19 13:13:56,944 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:13:56,979 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-03-19 13:13:56,979 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-03-19 13:13:56,986 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:13:56,995 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-03-19 13:13:56,995 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-03-19 13:13:57,037 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:13:57,042 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:13:57,042 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:13:57,042 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:13:57,046 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:13:57,046 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:13:57,046 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:13:57,051 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:13:57,052 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:13:57,075 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:13:57,106 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-03-19 13:13:57,106 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-03-19 13:13:57,131 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:13:57,143 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:13:57,143 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:13:57,143 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:13:57,150 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:13:57,150 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:13:57,150 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:13:57,157 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:13:57,158 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:13:57,168 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 13:13:57,178 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 13:13:57,179 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 13:13:57,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:13:57 BoogieIcfgContainer [2022-03-19 13:13:57,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 13:13:57,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 13:13:57,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 13:13:57,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 13:13:57,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 01:13:56" (1/3) ... [2022-03-19 13:13:57,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35beb97f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:13:57, skipping insertion in model container [2022-03-19 13:13:57,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:13:56" (2/3) ... [2022-03-19 13:13:57,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35beb97f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:13:57, skipping insertion in model container [2022-03-19 13:13:57,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:13:57" (3/3) ... [2022-03-19 13:13:57,188 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl3.cil-2.c [2022-03-19 13:13:57,191 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 13:13:57,192 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 13:13:57,218 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 13:13:57,223 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 13:13:57,223 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 13:13:57,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 304 states, 221 states have (on average 1.420814479638009) internal successors, (314), 243 states have internal predecessors, (314), 56 states have call successors, (56), 24 states have call predecessors, (56), 24 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-19 13:13:57,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 13:13:57,243 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:13:57,244 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:13:57,244 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:13:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:13:57,247 INFO L85 PathProgramCache]: Analyzing trace with hash 678159399, now seen corresponding path program 1 times [2022-03-19 13:13:57,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:13:57,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1756938294] [2022-03-19 13:13:57,259 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:13:57,259 INFO L85 PathProgramCache]: Analyzing trace with hash 678159399, now seen corresponding path program 2 times [2022-03-19 13:13:57,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:13:57,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768734487] [2022-03-19 13:13:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:13:57,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:13:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:13:57,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:13:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:13:57,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:13:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:13:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:13:57,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:13:57,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768734487] [2022-03-19 13:13:57,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768734487] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:13:57,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:13:57,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 13:13:57,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:13:57,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1756938294] [2022-03-19 13:13:57,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1756938294] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:13:57,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:13:57,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 13:13:57,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998391408] [2022-03-19 13:13:57,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:13:57,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 13:13:57,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:13:57,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 13:13:57,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 13:13:57,574 INFO L87 Difference]: Start difference. First operand has 304 states, 221 states have (on average 1.420814479638009) internal successors, (314), 243 states have internal predecessors, (314), 56 states have call successors, (56), 24 states have call predecessors, (56), 24 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 13:13:58,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:13:58,313 INFO L93 Difference]: Finished difference Result 538 states and 779 transitions. [2022-03-19 13:13:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 13:13:58,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-19 13:13:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:13:58,322 INFO L225 Difference]: With dead ends: 538 [2022-03-19 13:13:58,322 INFO L226 Difference]: Without dead ends: 322 [2022-03-19 13:13:58,337 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 13:13:58,339 INFO L912 BasicCegarLoop]: 366 mSDtfsCounter, 240 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 13:13:58,339 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 571 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 13:13:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-03-19 13:13:58,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 292. [2022-03-19 13:13:58,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 213 states have (on average 1.3708920187793427) internal successors, (292), 233 states have internal predecessors, (292), 56 states have call successors, (56), 24 states have call predecessors, (56), 22 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-19 13:13:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 385 transitions. [2022-03-19 13:13:58,410 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 385 transitions. Word has length 20 [2022-03-19 13:13:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:13:58,411 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 385 transitions. [2022-03-19 13:13:58,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 13:13:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 385 transitions. [2022-03-19 13:13:58,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 13:13:58,412 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:13:58,412 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:13:58,412 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 13:13:58,412 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:13:58,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:13:58,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1368814580, now seen corresponding path program 1 times [2022-03-19 13:13:58,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:13:58,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [376623057] [2022-03-19 13:13:58,413 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:13:58,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1368814580, now seen corresponding path program 2 times [2022-03-19 13:13:58,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:13:58,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467525438] [2022-03-19 13:13:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:13:58,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:13:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:13:58,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:13:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:13:58,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:13:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:13:58,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:13:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:13:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:13:58,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:13:58,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467525438] [2022-03-19 13:13:58,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467525438] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:13:58,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:13:58,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:13:58,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:13:58,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [376623057] [2022-03-19 13:13:58,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [376623057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:13:58,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:13:58,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:13:58,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211711012] [2022-03-19 13:13:58,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:13:58,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 13:13:58,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:13:58,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 13:13:58,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 13:13:58,565 INFO L87 Difference]: Start difference. First operand 292 states and 385 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-03-19 13:13:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:13:59,879 INFO L93 Difference]: Finished difference Result 637 states and 856 transitions. [2022-03-19 13:13:59,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 13:13:59,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 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 28 [2022-03-19 13:13:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:13:59,883 INFO L225 Difference]: With dead ends: 637 [2022-03-19 13:13:59,883 INFO L226 Difference]: Without dead ends: 476 [2022-03-19 13:13:59,884 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-19 13:13:59,885 INFO L912 BasicCegarLoop]: 504 mSDtfsCounter, 449 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 13:13:59,885 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 741 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 13:13:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-19 13:13:59,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 429. [2022-03-19 13:13:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 328 states have (on average 1.3140243902439024) internal successors, (431), 334 states have internal predecessors, (431), 65 states have call successors, (65), 37 states have call predecessors, (65), 35 states have return successors, (74), 59 states have call predecessors, (74), 54 states have call successors, (74) [2022-03-19 13:13:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 570 transitions. [2022-03-19 13:13:59,926 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 570 transitions. Word has length 28 [2022-03-19 13:13:59,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:13:59,927 INFO L478 AbstractCegarLoop]: Abstraction has 429 states and 570 transitions. [2022-03-19 13:13:59,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-03-19 13:13:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 570 transitions. [2022-03-19 13:13:59,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 13:13:59,928 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:13:59,928 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:13:59,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 13:13:59,928 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:13:59,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:13:59,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1511850433, now seen corresponding path program 1 times [2022-03-19 13:13:59,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:13:59,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1037521364] [2022-03-19 13:13:59,929 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:13:59,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1511850433, now seen corresponding path program 2 times [2022-03-19 13:13:59,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:13:59,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019755873] [2022-03-19 13:13:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:13:59,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:13:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:00,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:00,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:00,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:00,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:00,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019755873] [2022-03-19 13:14:00,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019755873] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:00,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:00,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:14:00,084 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:00,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1037521364] [2022-03-19 13:14:00,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1037521364] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:00,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:00,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:14:00,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666526462] [2022-03-19 13:14:00,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:00,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 13:14:00,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 13:14:00,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 13:14:00,085 INFO L87 Difference]: Start difference. First operand 429 states and 570 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, (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) [2022-03-19 13:14:00,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:00,707 INFO L93 Difference]: Finished difference Result 943 states and 1257 transitions. [2022-03-19 13:14:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 13:14:00,707 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, (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 30 [2022-03-19 13:14:00,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:00,710 INFO L225 Difference]: With dead ends: 943 [2022-03-19 13:14:00,710 INFO L226 Difference]: Without dead ends: 675 [2022-03-19 13:14:00,711 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-19 13:14:00,712 INFO L912 BasicCegarLoop]: 349 mSDtfsCounter, 647 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:00,712 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 550 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 13:14:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-03-19 13:14:00,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 632. [2022-03-19 13:14:00,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 493 states have (on average 1.3144016227180528) internal successors, (648), 497 states have internal predecessors, (648), 85 states have call successors, (85), 55 states have call predecessors, (85), 53 states have return successors, (112), 81 states have call predecessors, (112), 76 states have call successors, (112) [2022-03-19 13:14:00,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 845 transitions. [2022-03-19 13:14:00,755 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 845 transitions. Word has length 30 [2022-03-19 13:14:00,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:00,755 INFO L478 AbstractCegarLoop]: Abstraction has 632 states and 845 transitions. [2022-03-19 13:14:00,756 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, (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) [2022-03-19 13:14:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 845 transitions. [2022-03-19 13:14:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 13:14:00,756 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:00,757 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:00,757 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 13:14:00,757 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:00,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1740442034, now seen corresponding path program 1 times [2022-03-19 13:14:00,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:00,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1658130793] [2022-03-19 13:14:00,758 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:00,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1740442034, now seen corresponding path program 2 times [2022-03-19 13:14:00,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:00,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182668549] [2022-03-19 13:14:00,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:00,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:00,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:00,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:00,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:00,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:00,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182668549] [2022-03-19 13:14:00,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182668549] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:00,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:00,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:14:00,945 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:00,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1658130793] [2022-03-19 13:14:00,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1658130793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:00,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:00,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:14:00,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423836789] [2022-03-19 13:14:00,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:00,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 13:14:00,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:00,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 13:14:00,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 13:14:00,947 INFO L87 Difference]: Start difference. First operand 632 states and 845 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-19 13:14:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:01,823 INFO L93 Difference]: Finished difference Result 739 states and 979 transitions. [2022-03-19 13:14:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 13:14:01,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 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 34 [2022-03-19 13:14:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:01,829 INFO L225 Difference]: With dead ends: 739 [2022-03-19 13:14:01,829 INFO L226 Difference]: Without dead ends: 721 [2022-03-19 13:14:01,830 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-19 13:14:01,830 INFO L912 BasicCegarLoop]: 325 mSDtfsCounter, 474 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:01,830 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 444 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:01,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-03-19 13:14:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 670. [2022-03-19 13:14:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 525 states have (on average 1.3161904761904761) internal successors, (691), 535 states have internal predecessors, (691), 86 states have call successors, (86), 57 states have call predecessors, (86), 58 states have return successors, (117), 80 states have call predecessors, (117), 78 states have call successors, (117) [2022-03-19 13:14:01,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 894 transitions. [2022-03-19 13:14:01,925 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 894 transitions. Word has length 34 [2022-03-19 13:14:01,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:01,925 INFO L478 AbstractCegarLoop]: Abstraction has 670 states and 894 transitions. [2022-03-19 13:14:01,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-19 13:14:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 894 transitions. [2022-03-19 13:14:01,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 13:14:01,927 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:01,927 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:01,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 13:14:01,927 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:01,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:01,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1127947077, now seen corresponding path program 1 times [2022-03-19 13:14:01,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:01,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [351805574] [2022-03-19 13:14:01,928 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:01,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1127947077, now seen corresponding path program 2 times [2022-03-19 13:14:01,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:01,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403573747] [2022-03-19 13:14:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:01,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:02,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:02,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:02,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:02,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 13:14:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:02,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:02,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403573747] [2022-03-19 13:14:02,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403573747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:02,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:02,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 13:14:02,126 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:02,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [351805574] [2022-03-19 13:14:02,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [351805574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:02,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:02,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 13:14:02,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582501290] [2022-03-19 13:14:02,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:02,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 13:14:02,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:02,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 13:14:02,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 13:14:02,128 INFO L87 Difference]: Start difference. First operand 670 states and 894 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 13:14:02,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:02,917 INFO L93 Difference]: Finished difference Result 763 states and 1009 transitions. [2022-03-19 13:14:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 13:14:02,918 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-03-19 13:14:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:02,920 INFO L225 Difference]: With dead ends: 763 [2022-03-19 13:14:02,920 INFO L226 Difference]: Without dead ends: 696 [2022-03-19 13:14:02,921 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:14:02,921 INFO L912 BasicCegarLoop]: 321 mSDtfsCounter, 520 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:02,922 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 722 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-03-19 13:14:03,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 674. [2022-03-19 13:14:03,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 528 states have (on average 1.3143939393939394) internal successors, (694), 538 states have internal predecessors, (694), 86 states have call successors, (86), 57 states have call predecessors, (86), 59 states have return successors, (118), 81 states have call predecessors, (118), 78 states have call successors, (118) [2022-03-19 13:14:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 898 transitions. [2022-03-19 13:14:03,010 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 898 transitions. Word has length 41 [2022-03-19 13:14:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:03,011 INFO L478 AbstractCegarLoop]: Abstraction has 674 states and 898 transitions. [2022-03-19 13:14:03,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 13:14:03,011 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 898 transitions. [2022-03-19 13:14:03,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 13:14:03,017 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:03,017 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:03,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 13:14:03,018 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:03,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:03,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1437203420, now seen corresponding path program 1 times [2022-03-19 13:14:03,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:03,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [333107349] [2022-03-19 13:14:03,018 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:03,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1437203420, now seen corresponding path program 2 times [2022-03-19 13:14:03,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:03,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858303983] [2022-03-19 13:14:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:03,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:03,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:03,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:03,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:03,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:03,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858303983] [2022-03-19 13:14:03,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858303983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:03,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:03,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:14:03,151 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:03,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [333107349] [2022-03-19 13:14:03,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [333107349] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:03,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:03,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:14:03,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153889676] [2022-03-19 13:14:03,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:03,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 13:14:03,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:03,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 13:14:03,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 13:14:03,152 INFO L87 Difference]: Start difference. First operand 674 states and 898 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-03-19 13:14:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:03,599 INFO L93 Difference]: Finished difference Result 701 states and 932 transitions. [2022-03-19 13:14:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 13:14:03,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 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 40 [2022-03-19 13:14:03,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:03,602 INFO L225 Difference]: With dead ends: 701 [2022-03-19 13:14:03,602 INFO L226 Difference]: Without dead ends: 698 [2022-03-19 13:14:03,602 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-19 13:14:03,603 INFO L912 BasicCegarLoop]: 342 mSDtfsCounter, 314 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:03,604 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 558 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 13:14:03,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-03-19 13:14:03,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 685. [2022-03-19 13:14:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 539 states have (on average 1.313543599257885) internal successors, (708), 548 states have internal predecessors, (708), 86 states have call successors, (86), 58 states have call predecessors, (86), 59 states have return successors, (118), 81 states have call predecessors, (118), 78 states have call successors, (118) [2022-03-19 13:14:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 912 transitions. [2022-03-19 13:14:03,667 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 912 transitions. Word has length 40 [2022-03-19 13:14:03,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:03,667 INFO L478 AbstractCegarLoop]: Abstraction has 685 states and 912 transitions. [2022-03-19 13:14:03,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-03-19 13:14:03,668 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 912 transitions. [2022-03-19 13:14:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 13:14:03,668 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:03,668 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:03,668 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 13:14:03,669 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:03,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:03,669 INFO L85 PathProgramCache]: Analyzing trace with hash 875613287, now seen corresponding path program 1 times [2022-03-19 13:14:03,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:03,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [398582806] [2022-03-19 13:14:03,669 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:03,669 INFO L85 PathProgramCache]: Analyzing trace with hash 875613287, now seen corresponding path program 2 times [2022-03-19 13:14:03,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:03,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378794694] [2022-03-19 13:14:03,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:03,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:03,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:03,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:03,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:03,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:03,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:03,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:03,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378794694] [2022-03-19 13:14:03,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378794694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:03,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:03,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:03,821 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:03,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [398582806] [2022-03-19 13:14:03,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [398582806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:03,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:03,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:03,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810891915] [2022-03-19 13:14:03,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:03,822 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 13:14:03,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:03,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 13:14:03,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-19 13:14:03,823 INFO L87 Difference]: Start difference. First operand 685 states and 912 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), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 13:14:04,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:04,374 INFO L93 Difference]: Finished difference Result 752 states and 994 transitions. [2022-03-19 13:14:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 13:14:04,375 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), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2022-03-19 13:14:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:04,383 INFO L225 Difference]: With dead ends: 752 [2022-03-19 13:14:04,390 INFO L226 Difference]: Without dead ends: 747 [2022-03-19 13:14:04,390 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-19 13:14:04,391 INFO L912 BasicCegarLoop]: 330 mSDtfsCounter, 422 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:04,391 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 713 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 13:14:04,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-19 13:14:04,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-03-19 13:14:04,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 566 states have (on average 1.3091872791519434) internal successors, (741), 578 states have internal predecessors, (741), 86 states have call successors, (86), 58 states have call predecessors, (86), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-03-19 13:14:04,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 951 transitions. [2022-03-19 13:14:04,470 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 951 transitions. Word has length 41 [2022-03-19 13:14:04,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:04,470 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 951 transitions. [2022-03-19 13:14:04,470 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), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 13:14:04,470 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 951 transitions. [2022-03-19 13:14:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 13:14:04,471 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:04,471 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:04,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-19 13:14:04,471 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:04,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1826085718, now seen corresponding path program 1 times [2022-03-19 13:14:04,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:04,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [943932535] [2022-03-19 13:14:04,472 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:04,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1826085718, now seen corresponding path program 2 times [2022-03-19 13:14:04,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:04,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569516532] [2022-03-19 13:14:04,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:04,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:04,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:04,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:04,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:04,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:04,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:04,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:04,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569516532] [2022-03-19 13:14:04,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569516532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:04,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:04,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:04,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:04,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [943932535] [2022-03-19 13:14:04,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [943932535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:04,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:04,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:04,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522744671] [2022-03-19 13:14:04,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:04,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:14:04,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:04,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:14:04,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:14:04,640 INFO L87 Difference]: Start difference. First operand 718 states and 951 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 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) [2022-03-19 13:14:05,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:05,589 INFO L93 Difference]: Finished difference Result 753 states and 993 transitions. [2022-03-19 13:14:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 13:14:05,589 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 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 42 [2022-03-19 13:14:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:05,592 INFO L225 Difference]: With dead ends: 753 [2022-03-19 13:14:05,592 INFO L226 Difference]: Without dead ends: 747 [2022-03-19 13:14:05,593 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-03-19 13:14:05,593 INFO L912 BasicCegarLoop]: 313 mSDtfsCounter, 1226 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:05,594 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1236 Valid, 666 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 13:14:05,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-19 13:14:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-03-19 13:14:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 566 states have (on average 1.3074204946996466) internal successors, (740), 578 states have internal predecessors, (740), 86 states have call successors, (86), 58 states have call predecessors, (86), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-03-19 13:14:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 950 transitions. [2022-03-19 13:14:05,716 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 950 transitions. Word has length 42 [2022-03-19 13:14:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:05,716 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 950 transitions. [2022-03-19 13:14:05,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 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) [2022-03-19 13:14:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 950 transitions. [2022-03-19 13:14:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 13:14:05,717 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:05,717 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:05,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-19 13:14:05,717 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:05,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:05,717 INFO L85 PathProgramCache]: Analyzing trace with hash -86309196, now seen corresponding path program 1 times [2022-03-19 13:14:05,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:05,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1160154179] [2022-03-19 13:14:05,718 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:05,718 INFO L85 PathProgramCache]: Analyzing trace with hash -86309196, now seen corresponding path program 2 times [2022-03-19 13:14:05,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:05,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228562819] [2022-03-19 13:14:05,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:05,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:05,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:05,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:05,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:05,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:05,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:05,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:05,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228562819] [2022-03-19 13:14:05,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228562819] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:05,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:05,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:05,892 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:05,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1160154179] [2022-03-19 13:14:05,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1160154179] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:05,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:05,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:05,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314306967] [2022-03-19 13:14:05,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:05,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:14:05,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:05,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:14:05,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:14:05,893 INFO L87 Difference]: Start difference. First operand 718 states and 950 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 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) [2022-03-19 13:14:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:06,985 INFO L93 Difference]: Finished difference Result 753 states and 992 transitions. [2022-03-19 13:14:06,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 13:14:06,985 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 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 43 [2022-03-19 13:14:06,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:06,988 INFO L225 Difference]: With dead ends: 753 [2022-03-19 13:14:06,988 INFO L226 Difference]: Without dead ends: 747 [2022-03-19 13:14:06,988 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-03-19 13:14:06,988 INFO L912 BasicCegarLoop]: 314 mSDtfsCounter, 662 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:06,989 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 732 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:06,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-19 13:14:07,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-03-19 13:14:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 566 states have (on average 1.3056537102473498) internal successors, (739), 578 states have internal predecessors, (739), 86 states have call successors, (86), 58 states have call predecessors, (86), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-03-19 13:14:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 949 transitions. [2022-03-19 13:14:07,058 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 949 transitions. Word has length 43 [2022-03-19 13:14:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:07,059 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 949 transitions. [2022-03-19 13:14:07,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 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) [2022-03-19 13:14:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 949 transitions. [2022-03-19 13:14:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 13:14:07,059 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:07,060 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:07,060 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-19 13:14:07,060 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:07,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:07,060 INFO L85 PathProgramCache]: Analyzing trace with hash -730291913, now seen corresponding path program 1 times [2022-03-19 13:14:07,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:07,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [257423853] [2022-03-19 13:14:07,060 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:07,061 INFO L85 PathProgramCache]: Analyzing trace with hash -730291913, now seen corresponding path program 2 times [2022-03-19 13:14:07,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:07,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642470073] [2022-03-19 13:14:07,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:07,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:07,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:07,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:07,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:07,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 13:14:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:07,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:07,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642470073] [2022-03-19 13:14:07,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642470073] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:07,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:07,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 13:14:07,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:07,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [257423853] [2022-03-19 13:14:07,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [257423853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:07,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:07,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 13:14:07,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880053196] [2022-03-19 13:14:07,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:07,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 13:14:07,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:07,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 13:14:07,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 13:14:07,185 INFO L87 Difference]: Start difference. First operand 718 states and 949 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 13:14:08,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:08,009 INFO L93 Difference]: Finished difference Result 1093 states and 1463 transitions. [2022-03-19 13:14:08,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 13:14:08,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-03-19 13:14:08,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:08,014 INFO L225 Difference]: With dead ends: 1093 [2022-03-19 13:14:08,014 INFO L226 Difference]: Without dead ends: 1090 [2022-03-19 13:14:08,014 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:14:08,015 INFO L912 BasicCegarLoop]: 434 mSDtfsCounter, 653 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:08,016 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 634 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 13:14:08,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-03-19 13:14:08,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 831. [2022-03-19 13:14:08,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 657 states have (on average 1.3135464231354643) internal successors, (863), 671 states have internal predecessors, (863), 96 states have call successors, (96), 68 states have call predecessors, (96), 77 states have return successors, (144), 93 states have call predecessors, (144), 88 states have call successors, (144) [2022-03-19 13:14:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1103 transitions. [2022-03-19 13:14:08,120 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1103 transitions. Word has length 44 [2022-03-19 13:14:08,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:08,120 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1103 transitions. [2022-03-19 13:14:08,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 13:14:08,121 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1103 transitions. [2022-03-19 13:14:08,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 13:14:08,121 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:08,121 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:08,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-19 13:14:08,122 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:08,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:08,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1703157951, now seen corresponding path program 1 times [2022-03-19 13:14:08,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:08,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [654068419] [2022-03-19 13:14:08,122 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:08,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1703157951, now seen corresponding path program 2 times [2022-03-19 13:14:08,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:08,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977307246] [2022-03-19 13:14:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:08,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:08,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:08,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:08,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:08,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:08,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:08,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:08,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977307246] [2022-03-19 13:14:08,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977307246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:08,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:08,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:08,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:08,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [654068419] [2022-03-19 13:14:08,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [654068419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:08,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:08,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:08,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631589662] [2022-03-19 13:14:08,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:08,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 13:14:08,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:08,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 13:14:08,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:14:08,291 INFO L87 Difference]: Start difference. First operand 831 states and 1103 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-03-19 13:14:09,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:09,088 INFO L93 Difference]: Finished difference Result 874 states and 1154 transitions. [2022-03-19 13:14:09,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 13:14:09,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 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 44 [2022-03-19 13:14:09,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:09,091 INFO L225 Difference]: With dead ends: 874 [2022-03-19 13:14:09,091 INFO L226 Difference]: Without dead ends: 856 [2022-03-19 13:14:09,092 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:14:09,092 INFO L912 BasicCegarLoop]: 340 mSDtfsCounter, 257 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:09,092 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 1080 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:09,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-03-19 13:14:09,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 829. [2022-03-19 13:14:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 656 states have (on average 1.3125) internal successors, (861), 670 states have internal predecessors, (861), 95 states have call successors, (95), 68 states have call predecessors, (95), 77 states have return successors, (143), 92 states have call predecessors, (143), 87 states have call successors, (143) [2022-03-19 13:14:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1099 transitions. [2022-03-19 13:14:09,182 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1099 transitions. Word has length 44 [2022-03-19 13:14:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:09,182 INFO L478 AbstractCegarLoop]: Abstraction has 829 states and 1099 transitions. [2022-03-19 13:14:09,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-03-19 13:14:09,183 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1099 transitions. [2022-03-19 13:14:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 13:14:09,183 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:09,183 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:09,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-19 13:14:09,183 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:09,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1402041733, now seen corresponding path program 1 times [2022-03-19 13:14:09,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:09,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1773456779] [2022-03-19 13:14:09,184 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1402041733, now seen corresponding path program 2 times [2022-03-19 13:14:09,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:09,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071971912] [2022-03-19 13:14:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:09,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:09,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:09,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:09,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:09,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 13:14:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:09,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:09,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071971912] [2022-03-19 13:14:09,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071971912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:09,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:09,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:09,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:09,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1773456779] [2022-03-19 13:14:09,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1773456779] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:09,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:09,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:09,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115346224] [2022-03-19 13:14:09,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:09,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 13:14:09,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:09,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 13:14:09,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:14:09,373 INFO L87 Difference]: Start difference. First operand 829 states and 1099 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 13:14:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:10,764 INFO L93 Difference]: Finished difference Result 1427 states and 1864 transitions. [2022-03-19 13:14:10,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:14:10,765 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 45 [2022-03-19 13:14:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:10,768 INFO L225 Difference]: With dead ends: 1427 [2022-03-19 13:14:10,768 INFO L226 Difference]: Without dead ends: 874 [2022-03-19 13:14:10,769 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-03-19 13:14:10,769 INFO L912 BasicCegarLoop]: 450 mSDtfsCounter, 1298 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:10,769 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1310 Valid, 698 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 13:14:10,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-03-19 13:14:10,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 820. [2022-03-19 13:14:10,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 647 states have (on average 1.2982998454404946) internal successors, (840), 661 states have internal predecessors, (840), 95 states have call successors, (95), 68 states have call predecessors, (95), 77 states have return successors, (143), 92 states have call predecessors, (143), 87 states have call successors, (143) [2022-03-19 13:14:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1078 transitions. [2022-03-19 13:14:10,870 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1078 transitions. Word has length 45 [2022-03-19 13:14:10,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:10,871 INFO L478 AbstractCegarLoop]: Abstraction has 820 states and 1078 transitions. [2022-03-19 13:14:10,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 13:14:10,871 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1078 transitions. [2022-03-19 13:14:10,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 13:14:10,872 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:10,872 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:10,872 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-19 13:14:10,872 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:10,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:10,872 INFO L85 PathProgramCache]: Analyzing trace with hash -81440673, now seen corresponding path program 1 times [2022-03-19 13:14:10,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:10,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [870363488] [2022-03-19 13:14:10,873 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:10,873 INFO L85 PathProgramCache]: Analyzing trace with hash -81440673, now seen corresponding path program 2 times [2022-03-19 13:14:10,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:10,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163006155] [2022-03-19 13:14:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:10,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:10,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:10,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:10,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:10,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 13:14:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:10,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:10,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163006155] [2022-03-19 13:14:10,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163006155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:10,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:10,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:10,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:10,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [870363488] [2022-03-19 13:14:10,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [870363488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:10,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:10,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:10,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146833057] [2022-03-19 13:14:10,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:10,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 13:14:10,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:10,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 13:14:10,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-19 13:14:10,996 INFO L87 Difference]: Start difference. First operand 820 states and 1078 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, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 13:14:11,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:11,666 INFO L93 Difference]: Finished difference Result 919 states and 1179 transitions. [2022-03-19 13:14:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 13:14:11,666 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, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-03-19 13:14:11,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:11,667 INFO L225 Difference]: With dead ends: 919 [2022-03-19 13:14:11,667 INFO L226 Difference]: Without dead ends: 580 [2022-03-19 13:14:11,669 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-03-19 13:14:11,670 INFO L912 BasicCegarLoop]: 380 mSDtfsCounter, 685 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:11,670 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 747 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 13:14:11,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-03-19 13:14:11,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 528. [2022-03-19 13:14:11,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 416 states have (on average 1.2740384615384615) internal successors, (530), 427 states have internal predecessors, (530), 62 states have call successors, (62), 43 states have call predecessors, (62), 49 states have return successors, (75), 59 states have call predecessors, (75), 54 states have call successors, (75) [2022-03-19 13:14:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 667 transitions. [2022-03-19 13:14:11,745 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 667 transitions. Word has length 49 [2022-03-19 13:14:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:11,746 INFO L478 AbstractCegarLoop]: Abstraction has 528 states and 667 transitions. [2022-03-19 13:14:11,746 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, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 13:14:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 667 transitions. [2022-03-19 13:14:11,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 13:14:11,746 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:11,746 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:11,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-19 13:14:11,747 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:11,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:11,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1263125299, now seen corresponding path program 1 times [2022-03-19 13:14:11,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:11,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1527372179] [2022-03-19 13:14:11,747 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:11,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1263125299, now seen corresponding path program 2 times [2022-03-19 13:14:11,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:11,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733678650] [2022-03-19 13:14:11,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:11,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:11,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:11,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:11,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:11,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 13:14:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:11,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:11,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 13:14:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:11,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:11,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733678650] [2022-03-19 13:14:11,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733678650] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:11,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:11,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:11,887 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:11,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1527372179] [2022-03-19 13:14:11,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1527372179] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:11,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:11,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:11,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336182341] [2022-03-19 13:14:11,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:11,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 13:14:11,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:11,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 13:14:11,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-19 13:14:11,889 INFO L87 Difference]: Start difference. First operand 528 states and 667 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 13:14:12,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:12,620 INFO L93 Difference]: Finished difference Result 834 states and 1062 transitions. [2022-03-19 13:14:12,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 13:14:12,620 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2022-03-19 13:14:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:12,622 INFO L225 Difference]: With dead ends: 834 [2022-03-19 13:14:12,622 INFO L226 Difference]: Without dead ends: 569 [2022-03-19 13:14:12,623 INFO L911 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 [2022-03-19 13:14:12,623 INFO L912 BasicCegarLoop]: 333 mSDtfsCounter, 288 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:12,623 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 761 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 13:14:12,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-03-19 13:14:12,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 542. [2022-03-19 13:14:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 429 states have (on average 1.275058275058275) internal successors, (547), 440 states have internal predecessors, (547), 62 states have call successors, (62), 43 states have call predecessors, (62), 50 states have return successors, (78), 59 states have call predecessors, (78), 54 states have call successors, (78) [2022-03-19 13:14:12,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 687 transitions. [2022-03-19 13:14:12,699 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 687 transitions. Word has length 58 [2022-03-19 13:14:12,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:12,699 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 687 transitions. [2022-03-19 13:14:12,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 13:14:12,699 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 687 transitions. [2022-03-19 13:14:12,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 13:14:12,700 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:12,700 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:12,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-19 13:14:12,700 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:12,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:12,700 INFO L85 PathProgramCache]: Analyzing trace with hash 445989130, now seen corresponding path program 1 times [2022-03-19 13:14:12,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:12,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1718458826] [2022-03-19 13:14:12,700 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:12,700 INFO L85 PathProgramCache]: Analyzing trace with hash 445989130, now seen corresponding path program 2 times [2022-03-19 13:14:12,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:12,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639449702] [2022-03-19 13:14:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:12,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:12,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:12,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:12,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:12,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:12,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 13:14:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:12,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:12,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639449702] [2022-03-19 13:14:12,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639449702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:12,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:12,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:12,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:12,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1718458826] [2022-03-19 13:14:12,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1718458826] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:12,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:12,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:12,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405576527] [2022-03-19 13:14:12,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:12,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:14:12,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:12,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:14:12,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:14:12,858 INFO L87 Difference]: Start difference. First operand 542 states and 687 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 13:14:14,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:14,081 INFO L93 Difference]: Finished difference Result 780 states and 989 transitions. [2022-03-19 13:14:14,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 13:14:14,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2022-03-19 13:14:14,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:14,083 INFO L225 Difference]: With dead ends: 780 [2022-03-19 13:14:14,083 INFO L226 Difference]: Without dead ends: 714 [2022-03-19 13:14:14,084 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-03-19 13:14:14,084 INFO L912 BasicCegarLoop]: 433 mSDtfsCounter, 1020 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:14,084 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1068 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:14:14,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-03-19 13:14:14,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 571. [2022-03-19 13:14:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 452 states have (on average 1.2676991150442478) internal successors, (573), 464 states have internal predecessors, (573), 64 states have call successors, (64), 44 states have call predecessors, (64), 54 states have return successors, (83), 63 states have call predecessors, (83), 56 states have call successors, (83) [2022-03-19 13:14:14,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 720 transitions. [2022-03-19 13:14:14,150 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 720 transitions. Word has length 52 [2022-03-19 13:14:14,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:14,151 INFO L478 AbstractCegarLoop]: Abstraction has 571 states and 720 transitions. [2022-03-19 13:14:14,151 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 13:14:14,151 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 720 transitions. [2022-03-19 13:14:14,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 13:14:14,152 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:14,152 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:14,152 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-19 13:14:14,152 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:14,152 INFO L85 PathProgramCache]: Analyzing trace with hash -119997841, now seen corresponding path program 1 times [2022-03-19 13:14:14,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:14,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1047504258] [2022-03-19 13:14:14,152 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:14,152 INFO L85 PathProgramCache]: Analyzing trace with hash -119997841, now seen corresponding path program 2 times [2022-03-19 13:14:14,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:14,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160346817] [2022-03-19 13:14:14,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:14,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:14,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:14,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:14,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:14,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:14,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 13:14:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:14,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:14,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160346817] [2022-03-19 13:14:14,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160346817] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:14,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:14,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:14,314 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:14,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1047504258] [2022-03-19 13:14:14,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1047504258] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:14,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:14,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:14,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371377629] [2022-03-19 13:14:14,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:14,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 13:14:14,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:14,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 13:14:14,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:14:14,315 INFO L87 Difference]: Start difference. First operand 571 states and 720 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 13:14:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:15,424 INFO L93 Difference]: Finished difference Result 1006 states and 1293 transitions. [2022-03-19 13:14:15,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 13:14:15,424 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-03-19 13:14:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:15,437 INFO L225 Difference]: With dead ends: 1006 [2022-03-19 13:14:15,437 INFO L226 Difference]: Without dead ends: 638 [2022-03-19 13:14:15,438 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-03-19 13:14:15,439 INFO L912 BasicCegarLoop]: 317 mSDtfsCounter, 502 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:15,439 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 750 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:14:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-03-19 13:14:15,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 583. [2022-03-19 13:14:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 464 states have (on average 1.271551724137931) internal successors, (590), 476 states have internal predecessors, (590), 64 states have call successors, (64), 44 states have call predecessors, (64), 54 states have return successors, (83), 63 states have call predecessors, (83), 56 states have call successors, (83) [2022-03-19 13:14:15,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 737 transitions. [2022-03-19 13:14:15,518 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 737 transitions. Word has length 54 [2022-03-19 13:14:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:15,518 INFO L478 AbstractCegarLoop]: Abstraction has 583 states and 737 transitions. [2022-03-19 13:14:15,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 13:14:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 737 transitions. [2022-03-19 13:14:15,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 13:14:15,520 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:15,521 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:15,521 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-19 13:14:15,521 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:15,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1708345743, now seen corresponding path program 1 times [2022-03-19 13:14:15,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:15,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1610356648] [2022-03-19 13:14:15,521 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:15,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1708345743, now seen corresponding path program 2 times [2022-03-19 13:14:15,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:15,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538783451] [2022-03-19 13:14:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:15,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:15,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:15,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:15,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:15,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:15,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 13:14:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:15,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:15,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538783451] [2022-03-19 13:14:15,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538783451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:15,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:15,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:14:15,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:15,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1610356648] [2022-03-19 13:14:15,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1610356648] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:15,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:15,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:14:15,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532791037] [2022-03-19 13:14:15,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:15,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 13:14:15,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:15,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 13:14:15,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-19 13:14:15,710 INFO L87 Difference]: Start difference. First operand 583 states and 737 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 13:14:17,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:17,026 INFO L93 Difference]: Finished difference Result 692 states and 873 transitions. [2022-03-19 13:14:17,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 13:14:17,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2022-03-19 13:14:17,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:17,029 INFO L225 Difference]: With dead ends: 692 [2022-03-19 13:14:17,029 INFO L226 Difference]: Without dead ends: 611 [2022-03-19 13:14:17,029 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-03-19 13:14:17,029 INFO L912 BasicCegarLoop]: 320 mSDtfsCounter, 545 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:17,029 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 906 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 13:14:17,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-03-19 13:14:17,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 564. [2022-03-19 13:14:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 447 states have (on average 1.2662192393736018) internal successors, (566), 459 states have internal predecessors, (566), 64 states have call successors, (64), 44 states have call predecessors, (64), 52 states have return successors, (81), 61 states have call predecessors, (81), 56 states have call successors, (81) [2022-03-19 13:14:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 711 transitions. [2022-03-19 13:14:17,109 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 711 transitions. Word has length 54 [2022-03-19 13:14:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:17,110 INFO L478 AbstractCegarLoop]: Abstraction has 564 states and 711 transitions. [2022-03-19 13:14:17,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 13:14:17,110 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 711 transitions. [2022-03-19 13:14:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 13:14:17,110 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:17,110 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:17,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-19 13:14:17,111 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:17,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:17,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1565066385, now seen corresponding path program 1 times [2022-03-19 13:14:17,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:17,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1662057399] [2022-03-19 13:14:17,111 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:17,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1565066385, now seen corresponding path program 2 times [2022-03-19 13:14:17,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:17,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759751055] [2022-03-19 13:14:17,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:17,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:17,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:17,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:17,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:17,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:17,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 13:14:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:17,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:17,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759751055] [2022-03-19 13:14:17,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759751055] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:17,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:17,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:17,225 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:17,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1662057399] [2022-03-19 13:14:17,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1662057399] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:17,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:17,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:17,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044704254] [2022-03-19 13:14:17,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:17,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 13:14:17,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:17,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 13:14:17,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-19 13:14:17,226 INFO L87 Difference]: Start difference. First operand 564 states and 711 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 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) [2022-03-19 13:14:17,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:17,980 INFO L93 Difference]: Finished difference Result 679 states and 856 transitions. [2022-03-19 13:14:17,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 13:14:17,980 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 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 54 [2022-03-19 13:14:17,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:17,982 INFO L225 Difference]: With dead ends: 679 [2022-03-19 13:14:17,982 INFO L226 Difference]: Without dead ends: 666 [2022-03-19 13:14:17,983 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-19 13:14:17,983 INFO L912 BasicCegarLoop]: 421 mSDtfsCounter, 441 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:17,983 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 788 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 13:14:17,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-03-19 13:14:18,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 580. [2022-03-19 13:14:18,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 461 states have (on average 1.2668112798264641) internal successors, (584), 473 states have internal predecessors, (584), 64 states have call successors, (64), 45 states have call predecessors, (64), 54 states have return successors, (85), 62 states have call predecessors, (85), 57 states have call successors, (85) [2022-03-19 13:14:18,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 733 transitions. [2022-03-19 13:14:18,065 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 733 transitions. Word has length 54 [2022-03-19 13:14:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:18,065 INFO L478 AbstractCegarLoop]: Abstraction has 580 states and 733 transitions. [2022-03-19 13:14:18,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 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) [2022-03-19 13:14:18,065 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 733 transitions. [2022-03-19 13:14:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 13:14:18,068 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:18,068 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:18,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-19 13:14:18,068 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:18,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:18,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1595293189, now seen corresponding path program 1 times [2022-03-19 13:14:18,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:18,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [234218557] [2022-03-19 13:14:18,068 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:18,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1595293189, now seen corresponding path program 2 times [2022-03-19 13:14:18,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:18,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535346147] [2022-03-19 13:14:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:18,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:18,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:18,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:18,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:18,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 13:14:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:18,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:18,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:18,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:18,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535346147] [2022-03-19 13:14:18,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535346147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:18,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:18,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:18,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:18,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [234218557] [2022-03-19 13:14:18,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [234218557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:18,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:18,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:18,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292620860] [2022-03-19 13:14:18,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:18,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 13:14:18,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:18,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 13:14:18,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:14:18,271 INFO L87 Difference]: Start difference. First operand 580 states and 733 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 13:14:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:18,938 INFO L93 Difference]: Finished difference Result 877 states and 1118 transitions. [2022-03-19 13:14:18,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 13:14:18,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 61 [2022-03-19 13:14:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:18,940 INFO L225 Difference]: With dead ends: 877 [2022-03-19 13:14:18,940 INFO L226 Difference]: Without dead ends: 544 [2022-03-19 13:14:18,941 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:14:18,941 INFO L912 BasicCegarLoop]: 335 mSDtfsCounter, 464 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:18,942 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 1080 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 13:14:18,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-03-19 13:14:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 506. [2022-03-19 13:14:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 398 states have (on average 1.2487437185929648) internal successors, (497), 406 states have internal predecessors, (497), 60 states have call successors, (60), 43 states have call predecessors, (60), 47 states have return successors, (70), 57 states have call predecessors, (70), 54 states have call successors, (70) [2022-03-19 13:14:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 627 transitions. [2022-03-19 13:14:19,023 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 627 transitions. Word has length 61 [2022-03-19 13:14:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:19,023 INFO L478 AbstractCegarLoop]: Abstraction has 506 states and 627 transitions. [2022-03-19 13:14:19,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 13:14:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 627 transitions. [2022-03-19 13:14:19,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 13:14:19,024 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:19,024 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:19,024 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-19 13:14:19,024 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:19,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:19,025 INFO L85 PathProgramCache]: Analyzing trace with hash -820540082, now seen corresponding path program 1 times [2022-03-19 13:14:19,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:19,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [364903002] [2022-03-19 13:14:19,025 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:19,025 INFO L85 PathProgramCache]: Analyzing trace with hash -820540082, now seen corresponding path program 2 times [2022-03-19 13:14:19,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:19,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362226902] [2022-03-19 13:14:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:19,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:19,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:19,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:19,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:19,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:19,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 13:14:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:19,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:19,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362226902] [2022-03-19 13:14:19,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362226902] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:19,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:19,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:14:19,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:19,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [364903002] [2022-03-19 13:14:19,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [364903002] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:19,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:19,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:14:19,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635585084] [2022-03-19 13:14:19,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:19,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 13:14:19,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:19,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 13:14:19,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-19 13:14:19,207 INFO L87 Difference]: Start difference. First operand 506 states and 627 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 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) [2022-03-19 13:14:20,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:20,087 INFO L93 Difference]: Finished difference Result 571 states and 711 transitions. [2022-03-19 13:14:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:14:20,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 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 55 [2022-03-19 13:14:20,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:20,089 INFO L225 Difference]: With dead ends: 571 [2022-03-19 13:14:20,090 INFO L226 Difference]: Without dead ends: 567 [2022-03-19 13:14:20,090 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:14:20,090 INFO L912 BasicCegarLoop]: 336 mSDtfsCounter, 344 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:20,090 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1544 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:20,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-03-19 13:14:20,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 523. [2022-03-19 13:14:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 413 states have (on average 1.2397094430992737) internal successors, (512), 421 states have internal predecessors, (512), 60 states have call successors, (60), 43 states have call predecessors, (60), 49 states have return successors, (77), 59 states have call predecessors, (77), 54 states have call successors, (77) [2022-03-19 13:14:20,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 649 transitions. [2022-03-19 13:14:20,174 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 649 transitions. Word has length 55 [2022-03-19 13:14:20,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:20,174 INFO L478 AbstractCegarLoop]: Abstraction has 523 states and 649 transitions. [2022-03-19 13:14:20,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 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) [2022-03-19 13:14:20,175 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 649 transitions. [2022-03-19 13:14:20,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 13:14:20,175 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:20,175 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:20,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-19 13:14:20,175 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:20,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:20,176 INFO L85 PathProgramCache]: Analyzing trace with hash -820263252, now seen corresponding path program 1 times [2022-03-19 13:14:20,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:20,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2109624255] [2022-03-19 13:14:20,176 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:20,176 INFO L85 PathProgramCache]: Analyzing trace with hash -820263252, now seen corresponding path program 2 times [2022-03-19 13:14:20,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:20,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237769512] [2022-03-19 13:14:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:20,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:20,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:20,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:20,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:20,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:20,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 13:14:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:20,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:20,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237769512] [2022-03-19 13:14:20,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237769512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:20,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:20,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:14:20,309 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:20,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2109624255] [2022-03-19 13:14:20,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2109624255] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:20,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:20,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:14:20,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490303264] [2022-03-19 13:14:20,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:20,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 13:14:20,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:20,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 13:14:20,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-19 13:14:20,310 INFO L87 Difference]: Start difference. First operand 523 states and 649 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 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) [2022-03-19 13:14:21,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:21,409 INFO L93 Difference]: Finished difference Result 566 states and 699 transitions. [2022-03-19 13:14:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 13:14:21,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 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 55 [2022-03-19 13:14:21,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:21,411 INFO L225 Difference]: With dead ends: 566 [2022-03-19 13:14:21,411 INFO L226 Difference]: Without dead ends: 551 [2022-03-19 13:14:21,412 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:14:21,416 INFO L912 BasicCegarLoop]: 340 mSDtfsCounter, 156 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:21,416 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1484 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2145 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 13:14:21,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-19 13:14:21,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 520. [2022-03-19 13:14:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 410 states have (on average 1.2414634146341463) internal successors, (509), 419 states have internal predecessors, (509), 60 states have call successors, (60), 43 states have call predecessors, (60), 49 states have return successors, (76), 58 states have call predecessors, (76), 54 states have call successors, (76) [2022-03-19 13:14:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 645 transitions. [2022-03-19 13:14:21,543 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 645 transitions. Word has length 55 [2022-03-19 13:14:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:21,544 INFO L478 AbstractCegarLoop]: Abstraction has 520 states and 645 transitions. [2022-03-19 13:14:21,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 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) [2022-03-19 13:14:21,544 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 645 transitions. [2022-03-19 13:14:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 13:14:21,545 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:21,545 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:21,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-19 13:14:21,546 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:21,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:21,546 INFO L85 PathProgramCache]: Analyzing trace with hash 329966136, now seen corresponding path program 1 times [2022-03-19 13:14:21,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:21,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2055293452] [2022-03-19 13:14:21,546 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:21,546 INFO L85 PathProgramCache]: Analyzing trace with hash 329966136, now seen corresponding path program 2 times [2022-03-19 13:14:21,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:21,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749915168] [2022-03-19 13:14:21,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:21,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:21,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:21,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:21,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:21,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:21,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 13:14:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:21,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-19 13:14:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:21,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:21,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749915168] [2022-03-19 13:14:21,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749915168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:21,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:21,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:21,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:21,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2055293452] [2022-03-19 13:14:21,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2055293452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:21,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:21,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:21,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33777014] [2022-03-19 13:14:21,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:21,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:14:21,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:21,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:14:21,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:14:21,730 INFO L87 Difference]: Start difference. First operand 520 states and 645 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 13:14:22,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:22,542 INFO L93 Difference]: Finished difference Result 566 states and 698 transitions. [2022-03-19 13:14:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 13:14:22,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2022-03-19 13:14:22,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:22,546 INFO L225 Difference]: With dead ends: 566 [2022-03-19 13:14:22,546 INFO L226 Difference]: Without dead ends: 523 [2022-03-19 13:14:22,546 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:14:22,546 INFO L912 BasicCegarLoop]: 319 mSDtfsCounter, 420 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:22,546 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 793 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1657 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:22,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-03-19 13:14:22,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 496. [2022-03-19 13:14:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 392 states have (on average 1.2372448979591837) internal successors, (485), 400 states have internal predecessors, (485), 58 states have call successors, (58), 41 states have call predecessors, (58), 45 states have return successors, (72), 55 states have call predecessors, (72), 52 states have call successors, (72) [2022-03-19 13:14:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 615 transitions. [2022-03-19 13:14:22,641 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 615 transitions. Word has length 57 [2022-03-19 13:14:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:22,641 INFO L478 AbstractCegarLoop]: Abstraction has 496 states and 615 transitions. [2022-03-19 13:14:22,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 13:14:22,641 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 615 transitions. [2022-03-19 13:14:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 13:14:22,642 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:22,642 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:22,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-19 13:14:22,642 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:22,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1260835731, now seen corresponding path program 1 times [2022-03-19 13:14:22,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:22,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [101753636] [2022-03-19 13:14:22,643 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:22,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1260835731, now seen corresponding path program 2 times [2022-03-19 13:14:22,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:22,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349586876] [2022-03-19 13:14:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:22,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:22,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:22,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:22,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:22,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:22,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 13:14:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:22,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:22,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349586876] [2022-03-19 13:14:22,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349586876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:22,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:22,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:22,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:22,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [101753636] [2022-03-19 13:14:22,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [101753636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:22,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:22,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:22,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206810086] [2022-03-19 13:14:22,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:22,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 13:14:22,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:22,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 13:14:22,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:14:22,783 INFO L87 Difference]: Start difference. First operand 496 states and 615 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 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) [2022-03-19 13:14:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:23,865 INFO L93 Difference]: Finished difference Result 531 states and 655 transitions. [2022-03-19 13:14:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:14:23,865 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 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 56 [2022-03-19 13:14:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:23,867 INFO L225 Difference]: With dead ends: 531 [2022-03-19 13:14:23,867 INFO L226 Difference]: Without dead ends: 513 [2022-03-19 13:14:23,867 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-03-19 13:14:23,868 INFO L912 BasicCegarLoop]: 317 mSDtfsCounter, 590 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:23,868 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 688 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:23,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-03-19 13:14:23,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 478. [2022-03-19 13:14:24,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 377 states have (on average 1.2413793103448276) internal successors, (468), 384 states have internal predecessors, (468), 57 states have call successors, (57), 41 states have call predecessors, (57), 43 states have return successors, (65), 53 states have call predecessors, (65), 51 states have call successors, (65) [2022-03-19 13:14:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 590 transitions. [2022-03-19 13:14:24,001 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 590 transitions. Word has length 56 [2022-03-19 13:14:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:24,001 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 590 transitions. [2022-03-19 13:14:24,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 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) [2022-03-19 13:14:24,001 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 590 transitions. [2022-03-19 13:14:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 13:14:24,002 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:24,002 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:24,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-19 13:14:24,002 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:24,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:24,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1413489118, now seen corresponding path program 1 times [2022-03-19 13:14:24,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:24,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1093876697] [2022-03-19 13:14:24,003 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:24,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1413489118, now seen corresponding path program 2 times [2022-03-19 13:14:24,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:24,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682420663] [2022-03-19 13:14:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:24,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:24,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:24,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:24,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:24,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 13:14:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:24,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:24,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:24,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:24,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:24,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682420663] [2022-03-19 13:14:24,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682420663] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:24,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:24,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:24,178 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:24,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1093876697] [2022-03-19 13:14:24,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1093876697] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:24,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:24,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:24,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050534332] [2022-03-19 13:14:24,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:24,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:14:24,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:24,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:14:24,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:14:24,179 INFO L87 Difference]: Start difference. First operand 478 states and 590 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 13:14:25,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:25,114 INFO L93 Difference]: Finished difference Result 770 states and 962 transitions. [2022-03-19 13:14:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 13:14:25,115 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-03-19 13:14:25,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:25,116 INFO L225 Difference]: With dead ends: 770 [2022-03-19 13:14:25,116 INFO L226 Difference]: Without dead ends: 511 [2022-03-19 13:14:25,117 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-03-19 13:14:25,117 INFO L912 BasicCegarLoop]: 309 mSDtfsCounter, 586 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:25,118 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 831 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:25,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-19 13:14:25,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 478. [2022-03-19 13:14:25,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 377 states have (on average 1.2360742705570291) internal successors, (466), 384 states have internal predecessors, (466), 57 states have call successors, (57), 41 states have call predecessors, (57), 43 states have return successors, (65), 53 states have call predecessors, (65), 51 states have call successors, (65) [2022-03-19 13:14:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 588 transitions. [2022-03-19 13:14:25,194 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 588 transitions. Word has length 65 [2022-03-19 13:14:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:25,195 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 588 transitions. [2022-03-19 13:14:25,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 13:14:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 588 transitions. [2022-03-19 13:14:25,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 13:14:25,195 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:25,196 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:25,196 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-19 13:14:25,196 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:25,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:25,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1686744212, now seen corresponding path program 1 times [2022-03-19 13:14:25,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:25,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [126732105] [2022-03-19 13:14:25,196 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:25,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1686744212, now seen corresponding path program 2 times [2022-03-19 13:14:25,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:25,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092680409] [2022-03-19 13:14:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:25,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:25,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:25,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:25,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:25,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:25,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:25,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:25,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092680409] [2022-03-19 13:14:25,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092680409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:25,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:25,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:14:25,383 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:25,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [126732105] [2022-03-19 13:14:25,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [126732105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:25,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:25,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:14:25,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016369065] [2022-03-19 13:14:25,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:25,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 13:14:25,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:25,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 13:14:25,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:14:25,384 INFO L87 Difference]: Start difference. First operand 478 states and 588 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 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) [2022-03-19 13:14:26,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:26,366 INFO L93 Difference]: Finished difference Result 522 states and 639 transitions. [2022-03-19 13:14:26,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:14:26,367 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 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 60 [2022-03-19 13:14:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:26,368 INFO L225 Difference]: With dead ends: 522 [2022-03-19 13:14:26,368 INFO L226 Difference]: Without dead ends: 501 [2022-03-19 13:14:26,369 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:14:26,369 INFO L912 BasicCegarLoop]: 324 mSDtfsCounter, 355 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:26,369 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 1540 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 13:14:26,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-03-19 13:14:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 474. [2022-03-19 13:14:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 374 states have (on average 1.2352941176470589) internal successors, (462), 381 states have internal predecessors, (462), 56 states have call successors, (56), 41 states have call predecessors, (56), 43 states have return successors, (64), 52 states have call predecessors, (64), 50 states have call successors, (64) [2022-03-19 13:14:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 582 transitions. [2022-03-19 13:14:26,446 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 582 transitions. Word has length 60 [2022-03-19 13:14:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:26,446 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 582 transitions. [2022-03-19 13:14:26,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 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) [2022-03-19 13:14:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 582 transitions. [2022-03-19 13:14:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 13:14:26,447 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:26,447 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:26,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-19 13:14:26,447 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:26,447 INFO L85 PathProgramCache]: Analyzing trace with hash -748372448, now seen corresponding path program 1 times [2022-03-19 13:14:26,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:26,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [909191325] [2022-03-19 13:14:26,447 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash -748372448, now seen corresponding path program 2 times [2022-03-19 13:14:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:26,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740301415] [2022-03-19 13:14:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:26,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:26,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:26,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:26,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:26,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 13:14:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:26,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:26,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:26,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:26,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:26,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740301415] [2022-03-19 13:14:26,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740301415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:26,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:26,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:26,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:26,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [909191325] [2022-03-19 13:14:26,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [909191325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:26,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:26,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:26,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589613550] [2022-03-19 13:14:26,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:26,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:14:26,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:26,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:14:26,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:14:26,621 INFO L87 Difference]: Start difference. First operand 474 states and 582 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 13:14:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:27,397 INFO L93 Difference]: Finished difference Result 752 states and 931 transitions. [2022-03-19 13:14:27,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 13:14:27,398 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 68 [2022-03-19 13:14:27,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:27,400 INFO L225 Difference]: With dead ends: 752 [2022-03-19 13:14:27,400 INFO L226 Difference]: Without dead ends: 526 [2022-03-19 13:14:27,400 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:14:27,403 INFO L912 BasicCegarLoop]: 327 mSDtfsCounter, 347 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:27,404 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1298 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 13:14:27,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-03-19 13:14:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 474. [2022-03-19 13:14:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 374 states have (on average 1.2299465240641712) internal successors, (460), 381 states have internal predecessors, (460), 56 states have call successors, (56), 41 states have call predecessors, (56), 43 states have return successors, (64), 52 states have call predecessors, (64), 50 states have call successors, (64) [2022-03-19 13:14:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 580 transitions. [2022-03-19 13:14:27,496 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 580 transitions. Word has length 68 [2022-03-19 13:14:27,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:27,496 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 580 transitions. [2022-03-19 13:14:27,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 13:14:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 580 transitions. [2022-03-19 13:14:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 13:14:27,496 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:27,497 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:27,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-19 13:14:27,497 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:27,497 INFO L85 PathProgramCache]: Analyzing trace with hash 923167144, now seen corresponding path program 1 times [2022-03-19 13:14:27,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:27,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [125032093] [2022-03-19 13:14:27,497 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:27,497 INFO L85 PathProgramCache]: Analyzing trace with hash 923167144, now seen corresponding path program 2 times [2022-03-19 13:14:27,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:27,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706023059] [2022-03-19 13:14:27,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:27,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:27,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:27,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:27,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:27,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:27,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:27,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:27,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706023059] [2022-03-19 13:14:27,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706023059] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:27,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:27,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:14:27,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:27,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [125032093] [2022-03-19 13:14:27,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [125032093] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:27,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:27,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:14:27,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997587975] [2022-03-19 13:14:27,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:27,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 13:14:27,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:27,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 13:14:27,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:14:27,668 INFO L87 Difference]: Start difference. First operand 474 states and 580 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 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) [2022-03-19 13:14:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:28,541 INFO L93 Difference]: Finished difference Result 518 states and 631 transitions. [2022-03-19 13:14:28,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:14:28,542 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 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 61 [2022-03-19 13:14:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:28,543 INFO L225 Difference]: With dead ends: 518 [2022-03-19 13:14:28,543 INFO L226 Difference]: Without dead ends: 496 [2022-03-19 13:14:28,543 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:14:28,544 INFO L912 BasicCegarLoop]: 333 mSDtfsCounter, 399 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:28,544 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1580 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-03-19 13:14:28,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 469. [2022-03-19 13:14:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 370 states have (on average 1.2297297297297298) internal successors, (455), 377 states have internal predecessors, (455), 55 states have call successors, (55), 41 states have call predecessors, (55), 43 states have return successors, (63), 51 states have call predecessors, (63), 49 states have call successors, (63) [2022-03-19 13:14:28,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 573 transitions. [2022-03-19 13:14:28,621 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 573 transitions. Word has length 61 [2022-03-19 13:14:28,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:28,621 INFO L478 AbstractCegarLoop]: Abstraction has 469 states and 573 transitions. [2022-03-19 13:14:28,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 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) [2022-03-19 13:14:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 573 transitions. [2022-03-19 13:14:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 13:14:28,622 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:28,622 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:28,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-19 13:14:28,622 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:28,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:28,622 INFO L85 PathProgramCache]: Analyzing trace with hash -6944326, now seen corresponding path program 1 times [2022-03-19 13:14:28,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:28,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [285403851] [2022-03-19 13:14:28,622 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:28,623 INFO L85 PathProgramCache]: Analyzing trace with hash -6944326, now seen corresponding path program 2 times [2022-03-19 13:14:28,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:28,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256988105] [2022-03-19 13:14:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:28,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:28,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:28,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:28,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:28,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:28,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:28,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:28,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256988105] [2022-03-19 13:14:28,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256988105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:28,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:28,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:14:28,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:28,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [285403851] [2022-03-19 13:14:28,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [285403851] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:28,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:28,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:14:28,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151544237] [2022-03-19 13:14:28,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:28,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 13:14:28,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:28,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 13:14:28,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:14:28,793 INFO L87 Difference]: Start difference. First operand 469 states and 573 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 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) [2022-03-19 13:14:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:29,625 INFO L93 Difference]: Finished difference Result 513 states and 624 transitions. [2022-03-19 13:14:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:14:29,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 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 61 [2022-03-19 13:14:29,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:29,627 INFO L225 Difference]: With dead ends: 513 [2022-03-19 13:14:29,627 INFO L226 Difference]: Without dead ends: 492 [2022-03-19 13:14:29,628 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:14:29,628 INFO L912 BasicCegarLoop]: 313 mSDtfsCounter, 312 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:29,628 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1452 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:29,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-03-19 13:14:29,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 465. [2022-03-19 13:14:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 367 states have (on average 1.228882833787466) internal successors, (451), 374 states have internal predecessors, (451), 54 states have call successors, (54), 41 states have call predecessors, (54), 43 states have return successors, (62), 50 states have call predecessors, (62), 48 states have call successors, (62) [2022-03-19 13:14:29,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 567 transitions. [2022-03-19 13:14:29,719 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 567 transitions. Word has length 61 [2022-03-19 13:14:29,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:29,719 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 567 transitions. [2022-03-19 13:14:29,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 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) [2022-03-19 13:14:29,720 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 567 transitions. [2022-03-19 13:14:29,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 13:14:29,720 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:29,720 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:29,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-19 13:14:29,721 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:29,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:29,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1018894417, now seen corresponding path program 1 times [2022-03-19 13:14:29,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:29,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1978548930] [2022-03-19 13:14:29,721 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:29,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1018894417, now seen corresponding path program 2 times [2022-03-19 13:14:29,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:29,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53743142] [2022-03-19 13:14:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:29,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:29,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:29,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:29,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:29,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 13:14:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:29,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:29,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:29,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:29,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:29,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53743142] [2022-03-19 13:14:29,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53743142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:29,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:29,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 13:14:29,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:29,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1978548930] [2022-03-19 13:14:29,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1978548930] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:29,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:29,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 13:14:29,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108356325] [2022-03-19 13:14:29,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:29,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 13:14:29,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:29,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 13:14:29,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-19 13:14:29,856 INFO L87 Difference]: Start difference. First operand 465 states and 567 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 13:14:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:30,635 INFO L93 Difference]: Finished difference Result 889 states and 1094 transitions. [2022-03-19 13:14:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 13:14:30,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-03-19 13:14:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:30,638 INFO L225 Difference]: With dead ends: 889 [2022-03-19 13:14:30,638 INFO L226 Difference]: Without dead ends: 636 [2022-03-19 13:14:30,638 INFO L911 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 [2022-03-19 13:14:30,639 INFO L912 BasicCegarLoop]: 366 mSDtfsCounter, 466 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:30,639 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 879 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 13:14:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-03-19 13:14:30,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 586. [2022-03-19 13:14:30,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 460 states have (on average 1.2195652173913043) internal successors, (561), 469 states have internal predecessors, (561), 67 states have call successors, (67), 51 states have call predecessors, (67), 58 states have return successors, (87), 66 states have call predecessors, (87), 62 states have call successors, (87) [2022-03-19 13:14:30,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 715 transitions. [2022-03-19 13:14:30,752 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 715 transitions. Word has length 67 [2022-03-19 13:14:30,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:30,753 INFO L478 AbstractCegarLoop]: Abstraction has 586 states and 715 transitions. [2022-03-19 13:14:30,753 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 13:14:30,753 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 715 transitions. [2022-03-19 13:14:30,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 13:14:30,753 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:30,753 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:30,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-19 13:14:30,754 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:30,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1715322647, now seen corresponding path program 1 times [2022-03-19 13:14:30,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:30,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1571136760] [2022-03-19 13:14:30,754 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:30,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1715322647, now seen corresponding path program 2 times [2022-03-19 13:14:30,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:30,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221654373] [2022-03-19 13:14:30,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:30,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:30,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:30,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:30,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:30,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:30,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-19 13:14:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:30,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:30,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221654373] [2022-03-19 13:14:30,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221654373] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:30,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:30,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:14:30,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:30,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1571136760] [2022-03-19 13:14:30,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1571136760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:30,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:30,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:14:30,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103202046] [2022-03-19 13:14:30,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:30,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 13:14:30,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:30,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 13:14:30,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:14:30,924 INFO L87 Difference]: Start difference. First operand 586 states and 715 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 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) [2022-03-19 13:14:31,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:31,702 INFO L93 Difference]: Finished difference Result 630 states and 767 transitions. [2022-03-19 13:14:31,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:14:31,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 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 65 [2022-03-19 13:14:31,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:31,704 INFO L225 Difference]: With dead ends: 630 [2022-03-19 13:14:31,705 INFO L226 Difference]: Without dead ends: 587 [2022-03-19 13:14:31,705 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:14:31,705 INFO L912 BasicCegarLoop]: 305 mSDtfsCounter, 273 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:31,706 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1432 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 13:14:31,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-03-19 13:14:31,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 560. [2022-03-19 13:14:31,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 439 states have (on average 1.2186788154897494) internal successors, (535), 448 states have internal predecessors, (535), 64 states have call successors, (64), 49 states have call predecessors, (64), 56 states have return successors, (84), 63 states have call predecessors, (84), 59 states have call successors, (84) [2022-03-19 13:14:31,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 683 transitions. [2022-03-19 13:14:31,831 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 683 transitions. Word has length 65 [2022-03-19 13:14:31,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:31,832 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 683 transitions. [2022-03-19 13:14:31,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 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) [2022-03-19 13:14:31,832 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 683 transitions. [2022-03-19 13:14:31,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 13:14:31,833 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:31,833 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:31,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-19 13:14:31,833 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:31,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1497395800, now seen corresponding path program 1 times [2022-03-19 13:14:31,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:31,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1964869583] [2022-03-19 13:14:31,834 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:31,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1497395800, now seen corresponding path program 2 times [2022-03-19 13:14:31,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:31,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485116725] [2022-03-19 13:14:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:31,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:31,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:31,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:31,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:31,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 13:14:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:31,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:31,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:31,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:31,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 13:14:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:31,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:31,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485116725] [2022-03-19 13:14:31,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485116725] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:31,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:31,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 13:14:31,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:31,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1964869583] [2022-03-19 13:14:31,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1964869583] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:31,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:31,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 13:14:31,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052042872] [2022-03-19 13:14:31,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:31,966 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 13:14:31,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:31,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 13:14:31,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-19 13:14:31,967 INFO L87 Difference]: Start difference. First operand 560 states and 683 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 13:14:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:32,632 INFO L93 Difference]: Finished difference Result 892 states and 1092 transitions. [2022-03-19 13:14:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 13:14:32,633 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 79 [2022-03-19 13:14:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:32,634 INFO L225 Difference]: With dead ends: 892 [2022-03-19 13:14:32,634 INFO L226 Difference]: Without dead ends: 575 [2022-03-19 13:14:32,635 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-03-19 13:14:32,636 INFO L912 BasicCegarLoop]: 406 mSDtfsCounter, 511 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:32,636 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 1041 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 13:14:32,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-03-19 13:14:32,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 542. [2022-03-19 13:14:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 425 states have (on average 1.2188235294117646) internal successors, (518), 433 states have internal predecessors, (518), 62 states have call successors, (62), 49 states have call predecessors, (62), 54 states have return successors, (73), 60 states have call predecessors, (73), 57 states have call successors, (73) [2022-03-19 13:14:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 653 transitions. [2022-03-19 13:14:32,730 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 653 transitions. Word has length 79 [2022-03-19 13:14:32,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:32,730 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 653 transitions. [2022-03-19 13:14:32,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 13:14:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 653 transitions. [2022-03-19 13:14:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 13:14:32,731 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:32,731 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:32,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-19 13:14:32,731 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1454956329, now seen corresponding path program 1 times [2022-03-19 13:14:32,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:32,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1767531131] [2022-03-19 13:14:32,731 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:32,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1454956329, now seen corresponding path program 2 times [2022-03-19 13:14:32,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:32,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683853843] [2022-03-19 13:14:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:32,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:32,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:32,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:32,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:32,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 13:14:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:32,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:32,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:32,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:32,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 13:14:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:32,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:32,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:32,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683853843] [2022-03-19 13:14:32,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683853843] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:32,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:32,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:14:32,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:32,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1767531131] [2022-03-19 13:14:32,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1767531131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:32,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:32,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:14:32,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385493759] [2022-03-19 13:14:32,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:32,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 13:14:32,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:32,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 13:14:32,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:14:32,904 INFO L87 Difference]: Start difference. First operand 542 states and 653 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 13:14:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:33,751 INFO L93 Difference]: Finished difference Result 905 states and 1127 transitions. [2022-03-19 13:14:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 13:14:33,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 80 [2022-03-19 13:14:33,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:33,753 INFO L225 Difference]: With dead ends: 905 [2022-03-19 13:14:33,753 INFO L226 Difference]: Without dead ends: 651 [2022-03-19 13:14:33,754 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-03-19 13:14:33,755 INFO L912 BasicCegarLoop]: 351 mSDtfsCounter, 464 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:33,755 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 1579 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 13:14:33,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-03-19 13:14:33,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 506. [2022-03-19 13:14:33,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 401 states have (on average 1.2194513715710724) internal successors, (489), 407 states have internal predecessors, (489), 55 states have call successors, (55), 43 states have call predecessors, (55), 49 states have return successors, (63), 56 states have call predecessors, (63), 51 states have call successors, (63) [2022-03-19 13:14:33,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 607 transitions. [2022-03-19 13:14:33,851 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 607 transitions. Word has length 80 [2022-03-19 13:14:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:33,852 INFO L478 AbstractCegarLoop]: Abstraction has 506 states and 607 transitions. [2022-03-19 13:14:33,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 13:14:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 607 transitions. [2022-03-19 13:14:33,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 13:14:33,852 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:33,852 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:33,853 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-19 13:14:33,853 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:33,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:33,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1018185184, now seen corresponding path program 1 times [2022-03-19 13:14:33,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:33,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [924346244] [2022-03-19 13:14:33,853 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:33,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1018185184, now seen corresponding path program 2 times [2022-03-19 13:14:33,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:33,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711592551] [2022-03-19 13:14:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:33,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:33,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:33,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:33,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:33,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:34,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:34,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:34,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:34,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:34,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 13:14:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:34,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:34,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711592551] [2022-03-19 13:14:34,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711592551] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:34,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:34,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 13:14:34,075 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:34,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [924346244] [2022-03-19 13:14:34,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [924346244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:34,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:34,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 13:14:34,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233856383] [2022-03-19 13:14:34,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:34,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 13:14:34,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:34,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 13:14:34,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:14:34,076 INFO L87 Difference]: Start difference. First operand 506 states and 607 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 13:14:34,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:34,969 INFO L93 Difference]: Finished difference Result 584 states and 699 transitions. [2022-03-19 13:14:34,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 13:14:34,969 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 85 [2022-03-19 13:14:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:34,973 INFO L225 Difference]: With dead ends: 584 [2022-03-19 13:14:34,973 INFO L226 Difference]: Without dead ends: 563 [2022-03-19 13:14:34,973 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-19 13:14:34,973 INFO L912 BasicCegarLoop]: 301 mSDtfsCounter, 270 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:34,974 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1763 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 13:14:34,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-03-19 13:14:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 514. [2022-03-19 13:14:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 408 states have (on average 1.2156862745098038) internal successors, (496), 414 states have internal predecessors, (496), 55 states have call successors, (55), 43 states have call predecessors, (55), 50 states have return successors, (66), 57 states have call predecessors, (66), 51 states have call successors, (66) [2022-03-19 13:14:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 617 transitions. [2022-03-19 13:14:35,064 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 617 transitions. Word has length 85 [2022-03-19 13:14:35,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:35,064 INFO L478 AbstractCegarLoop]: Abstraction has 514 states and 617 transitions. [2022-03-19 13:14:35,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 13:14:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 617 transitions. [2022-03-19 13:14:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 13:14:35,065 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:35,065 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:35,065 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-19 13:14:35,065 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:35,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:35,066 INFO L85 PathProgramCache]: Analyzing trace with hash 20545018, now seen corresponding path program 1 times [2022-03-19 13:14:35,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:35,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1432959323] [2022-03-19 13:14:35,066 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:35,066 INFO L85 PathProgramCache]: Analyzing trace with hash 20545018, now seen corresponding path program 2 times [2022-03-19 13:14:35,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:35,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879841800] [2022-03-19 13:14:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:35,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:35,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:35,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:35,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:35,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:35,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 13:14:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:35,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:35,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 13:14:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:35,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:35,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879841800] [2022-03-19 13:14:35,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879841800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:35,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:35,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:35,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:35,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1432959323] [2022-03-19 13:14:35,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1432959323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:35,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:35,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:35,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200658443] [2022-03-19 13:14:35,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:35,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:14:35,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:35,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:14:35,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:14:35,239 INFO L87 Difference]: Start difference. First operand 514 states and 617 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 5 states have internal predecessors, (64), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-19 13:14:36,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:36,315 INFO L93 Difference]: Finished difference Result 1003 states and 1185 transitions. [2022-03-19 13:14:36,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 13:14:36,315 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 5 states have internal predecessors, (64), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 80 [2022-03-19 13:14:36,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:36,317 INFO L225 Difference]: With dead ends: 1003 [2022-03-19 13:14:36,317 INFO L226 Difference]: Without dead ends: 667 [2022-03-19 13:14:36,318 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-03-19 13:14:36,318 INFO L912 BasicCegarLoop]: 331 mSDtfsCounter, 797 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:36,318 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 572 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:36,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-19 13:14:36,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 635. [2022-03-19 13:14:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 505 states have (on average 1.205940594059406) internal successors, (609), 513 states have internal predecessors, (609), 63 states have call successors, (63), 55 states have call predecessors, (63), 66 states have return successors, (77), 67 states have call predecessors, (77), 59 states have call successors, (77) [2022-03-19 13:14:36,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 749 transitions. [2022-03-19 13:14:36,458 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 749 transitions. Word has length 80 [2022-03-19 13:14:36,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:36,458 INFO L478 AbstractCegarLoop]: Abstraction has 635 states and 749 transitions. [2022-03-19 13:14:36,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 5 states have internal predecessors, (64), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-19 13:14:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 749 transitions. [2022-03-19 13:14:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 13:14:36,459 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:36,459 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:36,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-19 13:14:36,459 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:36,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:36,460 INFO L85 PathProgramCache]: Analyzing trace with hash -609741853, now seen corresponding path program 1 times [2022-03-19 13:14:36,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:36,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [608866748] [2022-03-19 13:14:36,460 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:36,460 INFO L85 PathProgramCache]: Analyzing trace with hash -609741853, now seen corresponding path program 2 times [2022-03-19 13:14:36,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:36,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425393956] [2022-03-19 13:14:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:36,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:36,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:36,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:36,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:36,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:36,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:36,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:36,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:36,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:36,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 13:14:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:36,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:36,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425393956] [2022-03-19 13:14:36,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425393956] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:36,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:36,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 13:14:36,701 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:36,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [608866748] [2022-03-19 13:14:36,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [608866748] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:36,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:36,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 13:14:36,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021985603] [2022-03-19 13:14:36,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:36,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 13:14:36,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:36,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 13:14:36,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:14:36,702 INFO L87 Difference]: Start difference. First operand 635 states and 749 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 13:14:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:37,644 INFO L93 Difference]: Finished difference Result 685 states and 801 transitions. [2022-03-19 13:14:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 13:14:37,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2022-03-19 13:14:37,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:37,646 INFO L225 Difference]: With dead ends: 685 [2022-03-19 13:14:37,646 INFO L226 Difference]: Without dead ends: 664 [2022-03-19 13:14:37,647 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-03-19 13:14:37,647 INFO L912 BasicCegarLoop]: 303 mSDtfsCounter, 429 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:37,647 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 1675 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-19 13:14:37,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 627. [2022-03-19 13:14:37,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 498 states have (on average 1.2068273092369477) internal successors, (601), 506 states have internal predecessors, (601), 63 states have call successors, (63), 55 states have call predecessors, (63), 65 states have return successors, (75), 66 states have call predecessors, (75), 59 states have call successors, (75) [2022-03-19 13:14:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 739 transitions. [2022-03-19 13:14:37,771 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 739 transitions. Word has length 86 [2022-03-19 13:14:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:37,772 INFO L478 AbstractCegarLoop]: Abstraction has 627 states and 739 transitions. [2022-03-19 13:14:37,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 13:14:37,772 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 739 transitions. [2022-03-19 13:14:37,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 13:14:37,773 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:37,773 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:37,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-19 13:14:37,773 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:37,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1602369481, now seen corresponding path program 1 times [2022-03-19 13:14:37,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:37,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1657738924] [2022-03-19 13:14:37,773 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:37,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1602369481, now seen corresponding path program 2 times [2022-03-19 13:14:37,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:37,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403532308] [2022-03-19 13:14:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:37,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:37,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:37,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:37,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:37,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:37,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 13:14:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:37,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:37,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 13:14:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:37,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403532308] [2022-03-19 13:14:37,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403532308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:37,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:37,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:37,927 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:37,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1657738924] [2022-03-19 13:14:37,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1657738924] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:37,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:37,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:37,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540421273] [2022-03-19 13:14:37,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:37,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 13:14:37,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:37,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 13:14:37,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:14:37,928 INFO L87 Difference]: Start difference. First operand 627 states and 739 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 13:14:38,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:38,706 INFO L93 Difference]: Finished difference Result 645 states and 757 transitions. [2022-03-19 13:14:38,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:14:38,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2022-03-19 13:14:38,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:38,708 INFO L225 Difference]: With dead ends: 645 [2022-03-19 13:14:38,708 INFO L226 Difference]: Without dead ends: 581 [2022-03-19 13:14:38,708 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:14:38,709 INFO L912 BasicCegarLoop]: 265 mSDtfsCounter, 313 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:38,709 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 444 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 13:14:38,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-03-19 13:14:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 579. [2022-03-19 13:14:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 456 states have (on average 1.206140350877193) internal successors, (550), 464 states have internal predecessors, (550), 61 states have call successors, (61), 53 states have call predecessors, (61), 61 states have return successors, (71), 62 states have call predecessors, (71), 57 states have call successors, (71) [2022-03-19 13:14:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 682 transitions. [2022-03-19 13:14:38,824 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 682 transitions. Word has length 81 [2022-03-19 13:14:38,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:38,824 INFO L478 AbstractCegarLoop]: Abstraction has 579 states and 682 transitions. [2022-03-19 13:14:38,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 13:14:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 682 transitions. [2022-03-19 13:14:38,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-19 13:14:38,825 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:38,825 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:38,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-19 13:14:38,826 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:38,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:38,826 INFO L85 PathProgramCache]: Analyzing trace with hash 577455992, now seen corresponding path program 1 times [2022-03-19 13:14:38,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:38,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1085281413] [2022-03-19 13:14:38,826 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:38,826 INFO L85 PathProgramCache]: Analyzing trace with hash 577455992, now seen corresponding path program 2 times [2022-03-19 13:14:38,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:38,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536837528] [2022-03-19 13:14:38,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:38,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:38,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:38,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:38,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:38,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:38,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 13:14:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:38,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:39,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 13:14:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:39,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 13:14:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:39,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:39,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536837528] [2022-03-19 13:14:39,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536837528] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:39,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:39,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 13:14:39,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:39,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1085281413] [2022-03-19 13:14:39,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1085281413] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:39,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:39,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 13:14:39,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989962571] [2022-03-19 13:14:39,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:39,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 13:14:39,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:39,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 13:14:39,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:14:39,042 INFO L87 Difference]: Start difference. First operand 579 states and 682 transitions. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 7 states have internal predecessors, (72), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 13:14:40,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:40,044 INFO L93 Difference]: Finished difference Result 583 states and 685 transitions. [2022-03-19 13:14:40,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 13:14:40,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 7 states have internal predecessors, (72), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 90 [2022-03-19 13:14:40,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:40,046 INFO L225 Difference]: With dead ends: 583 [2022-03-19 13:14:40,046 INFO L226 Difference]: Without dead ends: 495 [2022-03-19 13:14:40,046 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-03-19 13:14:40,046 INFO L912 BasicCegarLoop]: 242 mSDtfsCounter, 628 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2095 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:40,047 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 611 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2095 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:14:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-19 13:14:40,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2022-03-19 13:14:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 384 states have (on average 1.2083333333333333) internal successors, (464), 391 states have internal predecessors, (464), 54 states have call successors, (54), 47 states have call predecessors, (54), 54 states have return successors, (64), 55 states have call predecessors, (64), 51 states have call successors, (64) [2022-03-19 13:14:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 582 transitions. [2022-03-19 13:14:40,137 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 582 transitions. Word has length 90 [2022-03-19 13:14:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:40,137 INFO L478 AbstractCegarLoop]: Abstraction has 493 states and 582 transitions. [2022-03-19 13:14:40,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 7 states have internal predecessors, (72), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 13:14:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 582 transitions. [2022-03-19 13:14:40,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-19 13:14:40,138 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:40,138 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:40,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-19 13:14:40,138 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:40,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:40,138 INFO L85 PathProgramCache]: Analyzing trace with hash -950683054, now seen corresponding path program 1 times [2022-03-19 13:14:40,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:40,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1606750043] [2022-03-19 13:14:40,139 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:40,139 INFO L85 PathProgramCache]: Analyzing trace with hash -950683054, now seen corresponding path program 2 times [2022-03-19 13:14:40,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:40,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785784436] [2022-03-19 13:14:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:40,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:40,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:40,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:40,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:40,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:40,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:40,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:40,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:40,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:40,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 13:14:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:40,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 13:14:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:40,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:40,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785784436] [2022-03-19 13:14:40,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785784436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:40,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:40,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:14:40,377 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:40,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1606750043] [2022-03-19 13:14:40,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1606750043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:40,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:40,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:14:40,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545535846] [2022-03-19 13:14:40,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:40,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 13:14:40,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:40,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 13:14:40,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:14:40,379 INFO L87 Difference]: Start difference. First operand 493 states and 582 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 13:14:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:40,783 INFO L93 Difference]: Finished difference Result 528 states and 616 transitions. [2022-03-19 13:14:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:14:40,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 96 [2022-03-19 13:14:40,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:40,785 INFO L225 Difference]: With dead ends: 528 [2022-03-19 13:14:40,785 INFO L226 Difference]: Without dead ends: 489 [2022-03-19 13:14:40,785 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:14:40,786 INFO L912 BasicCegarLoop]: 195 mSDtfsCounter, 194 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:40,786 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 861 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 13:14:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-03-19 13:14:40,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 436. [2022-03-19 13:14:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 340 states have (on average 1.1970588235294117) internal successors, (407), 346 states have internal predecessors, (407), 47 states have call successors, (47), 42 states have call predecessors, (47), 48 states have return successors, (55), 48 states have call predecessors, (55), 44 states have call successors, (55) [2022-03-19 13:14:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 509 transitions. [2022-03-19 13:14:40,867 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 509 transitions. Word has length 96 [2022-03-19 13:14:40,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:40,867 INFO L478 AbstractCegarLoop]: Abstraction has 436 states and 509 transitions. [2022-03-19 13:14:40,867 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 13:14:40,867 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 509 transitions. [2022-03-19 13:14:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-19 13:14:40,868 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:40,868 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:40,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-19 13:14:40,868 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:40,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:40,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1418124295, now seen corresponding path program 1 times [2022-03-19 13:14:40,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:40,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [357181471] [2022-03-19 13:14:40,868 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:40,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1418124295, now seen corresponding path program 2 times [2022-03-19 13:14:40,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:40,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857510186] [2022-03-19 13:14:40,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:40,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:40,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:40,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:40,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:41,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:41,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:41,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:41,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:41,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:41,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 13:14:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:41,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 13:14:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:41,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:41,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857510186] [2022-03-19 13:14:41,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857510186] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:41,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:41,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 13:14:41,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:41,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [357181471] [2022-03-19 13:14:41,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [357181471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:41,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:41,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 13:14:41,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542013051] [2022-03-19 13:14:41,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:41,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 13:14:41,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:41,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 13:14:41,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-19 13:14:41,113 INFO L87 Difference]: Start difference. First operand 436 states and 509 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-19 13:14:41,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:41,950 INFO L93 Difference]: Finished difference Result 836 states and 980 transitions. [2022-03-19 13:14:41,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 13:14:41,951 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 96 [2022-03-19 13:14:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:41,953 INFO L225 Difference]: With dead ends: 836 [2022-03-19 13:14:41,953 INFO L226 Difference]: Without dead ends: 791 [2022-03-19 13:14:41,954 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-03-19 13:14:41,954 INFO L912 BasicCegarLoop]: 342 mSDtfsCounter, 353 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:41,954 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 1604 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 13:14:41,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-19 13:14:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 416. [2022-03-19 13:14:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 324 states have (on average 1.1975308641975309) internal successors, (388), 329 states have internal predecessors, (388), 44 states have call successors, (44), 41 states have call predecessors, (44), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-03-19 13:14:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 484 transitions. [2022-03-19 13:14:42,043 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 484 transitions. Word has length 96 [2022-03-19 13:14:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:42,044 INFO L478 AbstractCegarLoop]: Abstraction has 416 states and 484 transitions. [2022-03-19 13:14:42,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-19 13:14:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 484 transitions. [2022-03-19 13:14:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-19 13:14:42,045 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:42,045 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:42,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-19 13:14:42,045 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:42,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2046322684, now seen corresponding path program 1 times [2022-03-19 13:14:42,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:42,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1130239100] [2022-03-19 13:14:42,045 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:42,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2046322684, now seen corresponding path program 2 times [2022-03-19 13:14:42,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:42,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581917868] [2022-03-19 13:14:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:42,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 13:14:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 13:14:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 13:14:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:42,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:42,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581917868] [2022-03-19 13:14:42,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581917868] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:42,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:42,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 13:14:42,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:42,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1130239100] [2022-03-19 13:14:42,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1130239100] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:42,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:42,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 13:14:42,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372896326] [2022-03-19 13:14:42,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:42,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 13:14:42,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:42,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 13:14:42,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-03-19 13:14:42,303 INFO L87 Difference]: Start difference. First operand 416 states and 484 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-03-19 13:14:43,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:43,005 INFO L93 Difference]: Finished difference Result 558 states and 653 transitions. [2022-03-19 13:14:43,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 13:14:43,005 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-03-19 13:14:43,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:43,006 INFO L225 Difference]: With dead ends: 558 [2022-03-19 13:14:43,006 INFO L226 Difference]: Without dead ends: 435 [2022-03-19 13:14:43,006 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-19 13:14:43,007 INFO L912 BasicCegarLoop]: 176 mSDtfsCounter, 131 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:43,007 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1111 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 13:14:43,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-03-19 13:14:43,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 425. [2022-03-19 13:14:43,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 332 states have (on average 1.1837349397590362) internal successors, (393), 338 states have internal predecessors, (393), 45 states have call successors, (45), 41 states have call predecessors, (45), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-03-19 13:14:43,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 490 transitions. [2022-03-19 13:14:43,102 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 490 transitions. Word has length 101 [2022-03-19 13:14:43,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:43,102 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 490 transitions. [2022-03-19 13:14:43,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-03-19 13:14:43,102 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 490 transitions. [2022-03-19 13:14:43,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 13:14:43,103 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:43,103 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:43,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-19 13:14:43,103 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:43,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:43,104 INFO L85 PathProgramCache]: Analyzing trace with hash 499266527, now seen corresponding path program 1 times [2022-03-19 13:14:43,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:43,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2012282003] [2022-03-19 13:14:43,104 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:43,104 INFO L85 PathProgramCache]: Analyzing trace with hash 499266527, now seen corresponding path program 2 times [2022-03-19 13:14:43,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:43,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418156785] [2022-03-19 13:14:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:43,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 13:14:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-03-19 13:14:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 13:14:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-19 13:14:43,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:43,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418156785] [2022-03-19 13:14:43,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418156785] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:43,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:43,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:14:43,300 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:43,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2012282003] [2022-03-19 13:14:43,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2012282003] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:43,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:43,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:14:43,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373737733] [2022-03-19 13:14:43,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:43,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 13:14:43,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:43,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 13:14:43,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:14:43,302 INFO L87 Difference]: Start difference. First operand 425 states and 490 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-03-19 13:14:43,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:43,808 INFO L93 Difference]: Finished difference Result 460 states and 524 transitions. [2022-03-19 13:14:43,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 13:14:43,809 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) Word has length 110 [2022-03-19 13:14:43,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:43,810 INFO L225 Difference]: With dead ends: 460 [2022-03-19 13:14:43,810 INFO L226 Difference]: Without dead ends: 376 [2022-03-19 13:14:43,810 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-03-19 13:14:43,810 INFO L912 BasicCegarLoop]: 178 mSDtfsCounter, 161 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:43,810 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 869 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 13:14:43,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-03-19 13:14:43,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 242. [2022-03-19 13:14:43,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 189 states have (on average 1.1428571428571428) internal successors, (216), 191 states have internal predecessors, (216), 26 states have call successors, (26), 26 states have call predecessors, (26), 26 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2022-03-19 13:14:43,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 268 transitions. [2022-03-19 13:14:43,868 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 268 transitions. Word has length 110 [2022-03-19 13:14:43,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:43,868 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 268 transitions. [2022-03-19 13:14:43,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-03-19 13:14:43,868 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 268 transitions. [2022-03-19 13:14:43,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-19 13:14:43,869 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:43,869 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:43,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-19 13:14:43,869 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:43,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:43,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1316472481, now seen corresponding path program 1 times [2022-03-19 13:14:43,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:43,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1981593893] [2022-03-19 13:14:43,870 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:43,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1316472481, now seen corresponding path program 2 times [2022-03-19 13:14:43,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:43,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021360567] [2022-03-19 13:14:43,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:43,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 13:14:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 13:14:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 13:14:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 13:14:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:44,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:44,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021360567] [2022-03-19 13:14:44,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021360567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:44,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:44,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 13:14:44,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:44,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1981593893] [2022-03-19 13:14:44,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1981593893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:44,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:44,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 13:14:44,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155046891] [2022-03-19 13:14:44,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:44,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 13:14:44,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:44,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 13:14:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-19 13:14:44,080 INFO L87 Difference]: Start difference. First operand 242 states and 268 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-19 13:14:44,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:44,599 INFO L93 Difference]: Finished difference Result 286 states and 315 transitions. [2022-03-19 13:14:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 13:14:44,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2022-03-19 13:14:44,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:44,601 INFO L225 Difference]: With dead ends: 286 [2022-03-19 13:14:44,601 INFO L226 Difference]: Without dead ends: 256 [2022-03-19 13:14:44,601 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-03-19 13:14:44,601 INFO L912 BasicCegarLoop]: 171 mSDtfsCounter, 250 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:44,601 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 724 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 13:14:44,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-19 13:14:44,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 246. [2022-03-19 13:14:44,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 192 states have (on average 1.140625) internal successors, (219), 194 states have internal predecessors, (219), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-03-19 13:14:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 272 transitions. [2022-03-19 13:14:44,662 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 272 transitions. Word has length 117 [2022-03-19 13:14:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:44,662 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 272 transitions. [2022-03-19 13:14:44,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-19 13:14:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 272 transitions. [2022-03-19 13:14:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-19 13:14:44,663 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:44,663 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:44,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-19 13:14:44,663 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:44,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:44,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1497958978, now seen corresponding path program 1 times [2022-03-19 13:14:44,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:44,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [791446865] [2022-03-19 13:14:44,664 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:44,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1497958978, now seen corresponding path program 2 times [2022-03-19 13:14:44,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:44,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933027852] [2022-03-19 13:14:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:44,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 13:14:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 13:14:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 13:14:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 13:14:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:44,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:44,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933027852] [2022-03-19 13:14:44,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933027852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:44,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:44,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 13:14:44,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:44,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [791446865] [2022-03-19 13:14:44,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [791446865] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:44,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:44,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 13:14:44,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530177486] [2022-03-19 13:14:44,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:44,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 13:14:44,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:44,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 13:14:44,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-19 13:14:44,884 INFO L87 Difference]: Start difference. First operand 246 states and 272 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-19 13:14:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:45,255 INFO L93 Difference]: Finished difference Result 332 states and 370 transitions. [2022-03-19 13:14:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 13:14:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2022-03-19 13:14:45,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:45,256 INFO L225 Difference]: With dead ends: 332 [2022-03-19 13:14:45,256 INFO L226 Difference]: Without dead ends: 252 [2022-03-19 13:14:45,257 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-03-19 13:14:45,257 INFO L912 BasicCegarLoop]: 171 mSDtfsCounter, 323 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:45,257 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 658 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 13:14:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-19 13:14:45,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 246. [2022-03-19 13:14:45,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 192 states have (on average 1.1354166666666667) internal successors, (218), 194 states have internal predecessors, (218), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-03-19 13:14:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 271 transitions. [2022-03-19 13:14:45,318 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 271 transitions. Word has length 117 [2022-03-19 13:14:45,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:45,318 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 271 transitions. [2022-03-19 13:14:45,318 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-19 13:14:45,318 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 271 transitions. [2022-03-19 13:14:45,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-19 13:14:45,319 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:45,319 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:45,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-19 13:14:45,319 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:45,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:45,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1606855094, now seen corresponding path program 1 times [2022-03-19 13:14:45,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:45,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1042779377] [2022-03-19 13:14:45,320 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:45,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1606855094, now seen corresponding path program 2 times [2022-03-19 13:14:45,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:45,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588814381] [2022-03-19 13:14:45,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:45,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 13:14:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 13:14:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 13:14:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-19 13:14:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 13:14:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 13:14:45,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:45,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588814381] [2022-03-19 13:14:45,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588814381] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:45,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:45,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 13:14:45,710 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:45,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1042779377] [2022-03-19 13:14:45,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1042779377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:45,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:45,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 13:14:45,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470574309] [2022-03-19 13:14:45,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:45,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 13:14:45,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:45,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 13:14:45,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-19 13:14:45,711 INFO L87 Difference]: Start difference. First operand 246 states and 271 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 11 states have internal predecessors, (98), 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) [2022-03-19 13:14:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:46,525 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2022-03-19 13:14:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 13:14:46,525 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 11 states have internal predecessors, (98), 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 147 [2022-03-19 13:14:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:46,526 INFO L225 Difference]: With dead ends: 318 [2022-03-19 13:14:46,526 INFO L226 Difference]: Without dead ends: 283 [2022-03-19 13:14:46,527 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 13:14:46,527 INFO L912 BasicCegarLoop]: 164 mSDtfsCounter, 290 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:46,527 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1382 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 13:14:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-19 13:14:46,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 263. [2022-03-19 13:14:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 207 states have (on average 1.144927536231884) internal successors, (237), 209 states have internal predecessors, (237), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-03-19 13:14:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 292 transitions. [2022-03-19 13:14:46,599 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 292 transitions. Word has length 147 [2022-03-19 13:14:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:46,599 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 292 transitions. [2022-03-19 13:14:46,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 11 states have internal predecessors, (98), 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) [2022-03-19 13:14:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 292 transitions. [2022-03-19 13:14:46,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-03-19 13:14:46,600 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:46,600 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:46,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-19 13:14:46,600 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:46,601 INFO L85 PathProgramCache]: Analyzing trace with hash 470260381, now seen corresponding path program 1 times [2022-03-19 13:14:46,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:46,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1021241145] [2022-03-19 13:14:46,601 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:46,601 INFO L85 PathProgramCache]: Analyzing trace with hash 470260381, now seen corresponding path program 2 times [2022-03-19 13:14:46,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:46,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371249068] [2022-03-19 13:14:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:46,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 13:14:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 13:14:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 13:14:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-19 13:14:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-19 13:14:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-19 13:14:46,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:46,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371249068] [2022-03-19 13:14:46,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371249068] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:46,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:46,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 13:14:46,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:46,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1021241145] [2022-03-19 13:14:46,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1021241145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:46,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:46,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 13:14:46,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619725109] [2022-03-19 13:14:46,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:46,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 13:14:46,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:46,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 13:14:46,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-19 13:14:46,960 INFO L87 Difference]: Start difference. First operand 263 states and 292 transitions. Second operand has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 10 states have internal predecessors, (100), 2 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) [2022-03-19 13:14:47,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:47,630 INFO L93 Difference]: Finished difference Result 358 states and 401 transitions. [2022-03-19 13:14:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 13:14:47,630 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 10 states have internal predecessors, (100), 2 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 148 [2022-03-19 13:14:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:47,631 INFO L225 Difference]: With dead ends: 358 [2022-03-19 13:14:47,631 INFO L226 Difference]: Without dead ends: 277 [2022-03-19 13:14:47,631 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-03-19 13:14:47,632 INFO L912 BasicCegarLoop]: 181 mSDtfsCounter, 208 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:47,632 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1552 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 13:14:47,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-19 13:14:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 263. [2022-03-19 13:14:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 207 states have (on average 1.1400966183574879) internal successors, (236), 209 states have internal predecessors, (236), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-03-19 13:14:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2022-03-19 13:14:47,696 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 148 [2022-03-19 13:14:47,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:47,696 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2022-03-19 13:14:47,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 10 states have internal predecessors, (100), 2 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) [2022-03-19 13:14:47,696 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2022-03-19 13:14:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-03-19 13:14:47,697 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:47,697 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:47,697 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-19 13:14:47,697 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:47,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1786465971, now seen corresponding path program 1 times [2022-03-19 13:14:47,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:47,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1210151149] [2022-03-19 13:14:47,698 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:47,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1786465971, now seen corresponding path program 2 times [2022-03-19 13:14:47,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:47,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225126942] [2022-03-19 13:14:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:47,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 13:14:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 13:14:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 13:14:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 13:14:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-19 13:14:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-19 13:14:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 13:14:47,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:47,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225126942] [2022-03-19 13:14:47,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225126942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:47,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:47,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 13:14:47,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:47,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1210151149] [2022-03-19 13:14:47,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1210151149] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:47,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:47,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 13:14:47,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305948211] [2022-03-19 13:14:47,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:48,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 13:14:48,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:48,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 13:14:48,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-19 13:14:48,000 INFO L87 Difference]: Start difference. First operand 263 states and 291 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 8 states have internal predecessors, (93), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-19 13:14:48,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:48,737 INFO L93 Difference]: Finished difference Result 304 states and 339 transitions. [2022-03-19 13:14:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 13:14:48,737 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 8 states have internal predecessors, (93), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) Word has length 150 [2022-03-19 13:14:48,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:48,738 INFO L225 Difference]: With dead ends: 304 [2022-03-19 13:14:48,738 INFO L226 Difference]: Without dead ends: 263 [2022-03-19 13:14:48,739 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-03-19 13:14:48,739 INFO L912 BasicCegarLoop]: 164 mSDtfsCounter, 252 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:48,739 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1132 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 13:14:48,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-19 13:14:48,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 257. [2022-03-19 13:14:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 203 states have (on average 1.1280788177339902) internal successors, (229), 205 states have internal predecessors, (229), 25 states have call successors, (25), 25 states have call predecessors, (25), 28 states have return successors, (28), 26 states have call predecessors, (28), 23 states have call successors, (28) [2022-03-19 13:14:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 282 transitions. [2022-03-19 13:14:48,804 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 282 transitions. Word has length 150 [2022-03-19 13:14:48,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:48,805 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 282 transitions. [2022-03-19 13:14:48,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 8 states have internal predecessors, (93), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-19 13:14:48,805 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 282 transitions. [2022-03-19 13:14:48,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 13:14:48,805 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:48,805 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:48,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-19 13:14:48,806 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:48,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:48,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1782392170, now seen corresponding path program 1 times [2022-03-19 13:14:48,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:48,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [635048109] [2022-03-19 13:14:48,806 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:48,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1782392170, now seen corresponding path program 2 times [2022-03-19 13:14:48,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:48,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105325035] [2022-03-19 13:14:48,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:48,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:48,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:48,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:48,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:48,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:48,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 13:14:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:48,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 13:14:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 13:14:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-03-19 13:14:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-03-19 13:14:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-19 13:14:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 13:14:49,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:49,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105325035] [2022-03-19 13:14:49,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105325035] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:49,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:49,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 13:14:49,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:49,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [635048109] [2022-03-19 13:14:49,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [635048109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:49,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:49,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 13:14:49,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618195066] [2022-03-19 13:14:49,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:49,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 13:14:49,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:49,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 13:14:49,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-19 13:14:49,050 INFO L87 Difference]: Start difference. First operand 257 states and 282 transitions. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-03-19 13:14:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:49,527 INFO L93 Difference]: Finished difference Result 318 states and 348 transitions. [2022-03-19 13:14:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 13:14:49,527 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 155 [2022-03-19 13:14:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:49,528 INFO L225 Difference]: With dead ends: 318 [2022-03-19 13:14:49,528 INFO L226 Difference]: Without dead ends: 243 [2022-03-19 13:14:49,528 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-03-19 13:14:49,528 INFO L912 BasicCegarLoop]: 143 mSDtfsCounter, 330 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:49,528 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 501 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 13:14:49,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-19 13:14:49,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2022-03-19 13:14:49,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 179 states have (on average 1.111731843575419) internal successors, (199), 181 states have internal predecessors, (199), 24 states have call successors, (24), 24 states have call predecessors, (24), 25 states have return successors, (25), 23 states have call predecessors, (25), 22 states have call successors, (25) [2022-03-19 13:14:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 248 transitions. [2022-03-19 13:14:49,586 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 248 transitions. Word has length 155 [2022-03-19 13:14:49,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:49,586 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 248 transitions. [2022-03-19 13:14:49,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-03-19 13:14:49,586 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 248 transitions. [2022-03-19 13:14:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-19 13:14:49,587 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:49,587 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:49,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-19 13:14:49,587 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:49,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:49,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1939794977, now seen corresponding path program 1 times [2022-03-19 13:14:49,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:49,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [108821892] [2022-03-19 13:14:49,588 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:49,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1939794977, now seen corresponding path program 2 times [2022-03-19 13:14:49,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:49,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857179993] [2022-03-19 13:14:49,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:49,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 13:14:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 13:14:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 13:14:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 13:14:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 13:14:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-19 13:14:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 13:14:49,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:49,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857179993] [2022-03-19 13:14:49,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857179993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:49,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:49,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 13:14:49,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:49,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [108821892] [2022-03-19 13:14:49,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [108821892] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:49,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:49,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 13:14:49,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288560699] [2022-03-19 13:14:49,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:49,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 13:14:49,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:49,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 13:14:49,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-03-19 13:14:49,815 INFO L87 Difference]: Start difference. First operand 229 states and 248 transitions. Second operand has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-19 13:14:50,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:50,225 INFO L93 Difference]: Finished difference Result 294 states and 319 transitions. [2022-03-19 13:14:50,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 13:14:50,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 157 [2022-03-19 13:14:50,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:50,226 INFO L225 Difference]: With dead ends: 294 [2022-03-19 13:14:50,226 INFO L226 Difference]: Without dead ends: 208 [2022-03-19 13:14:50,227 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-03-19 13:14:50,228 INFO L912 BasicCegarLoop]: 146 mSDtfsCounter, 192 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:50,228 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 773 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 13:14:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-19 13:14:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-03-19 13:14:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 161 states have (on average 1.0993788819875776) internal successors, (177), 162 states have internal predecessors, (177), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-03-19 13:14:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 223 transitions. [2022-03-19 13:14:50,295 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 223 transitions. Word has length 157 [2022-03-19 13:14:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:50,295 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 223 transitions. [2022-03-19 13:14:50,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-19 13:14:50,295 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 223 transitions. [2022-03-19 13:14:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-19 13:14:50,296 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:50,296 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:50,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-19 13:14:50,296 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:50,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:50,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1409620627, now seen corresponding path program 1 times [2022-03-19 13:14:50,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:50,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [240574290] [2022-03-19 13:14:50,297 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:50,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1409620627, now seen corresponding path program 2 times [2022-03-19 13:14:50,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:50,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530488725] [2022-03-19 13:14:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:50,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 13:14:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 13:14:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 13:14:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 13:14:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-19 13:14:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-19 13:14:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 13:14:50,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:50,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530488725] [2022-03-19 13:14:50,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530488725] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:50,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:50,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 13:14:50,592 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:50,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [240574290] [2022-03-19 13:14:50,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [240574290] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:50,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:50,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 13:14:50,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765459799] [2022-03-19 13:14:50,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:50,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 13:14:50,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:50,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 13:14:50,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-03-19 13:14:50,593 INFO L87 Difference]: Start difference. First operand 208 states and 223 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 13:14:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:51,583 INFO L93 Difference]: Finished difference Result 410 states and 441 transitions. [2022-03-19 13:14:51,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 13:14:51,583 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 158 [2022-03-19 13:14:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:51,584 INFO L225 Difference]: With dead ends: 410 [2022-03-19 13:14:51,584 INFO L226 Difference]: Without dead ends: 211 [2022-03-19 13:14:51,585 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=387, Invalid=1965, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 13:14:51,586 INFO L912 BasicCegarLoop]: 136 mSDtfsCounter, 591 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:51,586 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 542 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 13:14:51,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-19 13:14:51,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2022-03-19 13:14:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 161 states have (on average 1.093167701863354) internal successors, (176), 162 states have internal predecessors, (176), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-03-19 13:14:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 222 transitions. [2022-03-19 13:14:51,634 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 222 transitions. Word has length 158 [2022-03-19 13:14:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:51,634 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 222 transitions. [2022-03-19 13:14:51,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 13:14:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 222 transitions. [2022-03-19 13:14:51,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-19 13:14:51,635 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:51,635 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 13:14:51,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-19 13:14:51,635 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:51,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:51,636 INFO L85 PathProgramCache]: Analyzing trace with hash -954221035, now seen corresponding path program 1 times [2022-03-19 13:14:51,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:51,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1268395449] [2022-03-19 13:14:51,636 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:51,636 INFO L85 PathProgramCache]: Analyzing trace with hash -954221035, now seen corresponding path program 2 times [2022-03-19 13:14:51,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:51,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119371967] [2022-03-19 13:14:51,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:51,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 13:14:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 13:14:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 13:14:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:14:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:14:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 13:14:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:52,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-19 13:14:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:52,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-19 13:14:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 13:14:52,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:52,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119371967] [2022-03-19 13:14:52,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119371967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:52,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:52,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 13:14:52,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:52,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1268395449] [2022-03-19 13:14:52,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1268395449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:52,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:52,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 13:14:52,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689992436] [2022-03-19 13:14:52,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:52,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 13:14:52,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 13:14:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-19 13:14:52,005 INFO L87 Difference]: Start difference. First operand 208 states and 222 transitions. Second operand has 25 states, 25 states have (on average 4.16) internal successors, (104), 11 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 13:14:52,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:52,876 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2022-03-19 13:14:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 13:14:52,876 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 11 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) Word has length 158 [2022-03-19 13:14:52,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:52,877 INFO L225 Difference]: With dead ends: 211 [2022-03-19 13:14:52,877 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 13:14:52,877 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 13:14:52,878 INFO L912 BasicCegarLoop]: 123 mSDtfsCounter, 412 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:52,878 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 698 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 13:14:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 13:14:52,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 13:14:52,878 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) [2022-03-19 13:14:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 13:14:52,878 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 158 [2022-03-19 13:14:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:52,878 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 13:14:52,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 11 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 13:14:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 13:14:52,878 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 13:14:52,880 INFO L788 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 13:14:52,881 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-19 13:14:52,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 13:27:06,053 WARN L232 SmtUtils]: Spent 12.22m on a formula simplification that was a NOOP. DAG size: 174 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)