/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/watermelon.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 06:18:02,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 06:18:02,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 06:18:02,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 06:18:02,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 06:18:02,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 06:18:02,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 06:18:02,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 06:18:02,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 06:18:02,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 06:18:02,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 06:18:02,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 06:18:02,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 06:18:02,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 06:18:02,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 06:18:02,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 06:18:02,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 06:18:02,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 06:18:02,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 06:18:02,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 06:18:02,605 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 06:18:02,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 06:18:02,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 06:18:02,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 06:18:02,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 06:18:02,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 06:18:02,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 06:18:02,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 06:18:02,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 06:18:02,624 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 06:18:02,646 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 06:18:02,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 06:18:02,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 06:18:02,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 06:18:02,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 06:18:02,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 06:18:02,650 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 06:18:02,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 06:18:02,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 06:18:02,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 06:18:02,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 06:18:02,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 06:18:02,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 06:18:02,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 06:18:02,651 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 06:18:02,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 06:18:02,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 06:18:02,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 06:18:02,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 06:18:02,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 06:18:02,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 06:18:02,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 06:18:02,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 06:18:02,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 06:18:02,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 06:18:02,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 06:18:02,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 06:18:02,653 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 06:18:02,653 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 06:18:02,654 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 06:18:02,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 06:18:02,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 06:18:02,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 06:18:02,865 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 06:18:02,866 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 06:18:02,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/watermelon.c [2022-04-05 06:18:02,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f12d759cd/f57158be798c45628f9425cbb9e7709e/FLAGd710744a0 [2022-04-05 06:18:03,263 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 06:18:03,264 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c [2022-04-05 06:18:03,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f12d759cd/f57158be798c45628f9425cbb9e7709e/FLAGd710744a0 [2022-04-05 06:18:03,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f12d759cd/f57158be798c45628f9425cbb9e7709e [2022-04-05 06:18:03,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 06:18:03,284 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 06:18:03,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 06:18:03,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 06:18:03,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 06:18:03,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 06:18:03" (1/1) ... [2022-04-05 06:18:03,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@704e34e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:18:03, skipping insertion in model container [2022-04-05 06:18:03,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 06:18:03" (1/1) ... [2022-04-05 06:18:03,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 06:18:03,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 06:18:03,420 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c[373,386] [2022-04-05 06:18:03,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 06:18:03,470 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 06:18:03,477 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c[373,386] [2022-04-05 06:18:03,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 06:18:03,491 INFO L208 MainTranslator]: Completed translation [2022-04-05 06:18:03,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:18:03 WrapperNode [2022-04-05 06:18:03,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 06:18:03,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 06:18:03,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 06:18:03,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 06:18:03,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:18:03" (1/1) ... [2022-04-05 06:18:03,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:18:03" (1/1) ... [2022-04-05 06:18:03,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:18:03" (1/1) ... [2022-04-05 06:18:03,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:18:03" (1/1) ... [2022-04-05 06:18:03,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:18:03" (1/1) ... [2022-04-05 06:18:03,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:18:03" (1/1) ... [2022-04-05 06:18:03,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:18:03" (1/1) ... [2022-04-05 06:18:03,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 06:18:03,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 06:18:03,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 06:18:03,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 06:18:03,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:18:03" (1/1) ... [2022-04-05 06:18:03,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 06:18:03,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:03,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 06:18:03,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 06:18:03,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 06:18:03,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 06:18:03,620 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 06:18:03,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 06:18:03,621 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-04-05 06:18:03,621 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-04-05 06:18:03,621 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 06:18:03,621 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 06:18:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 06:18:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 06:18:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 06:18:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 06:18:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 06:18:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-04-05 06:18:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-04-05 06:18:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 06:18:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 06:18:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 06:18:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 06:18:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 06:18:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 06:18:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 06:18:03,674 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 06:18:03,676 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 06:18:03,794 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 06:18:03,798 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 06:18:03,799 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 06:18:03,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:18:03 BoogieIcfgContainer [2022-04-05 06:18:03,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 06:18:03,801 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 06:18:03,801 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 06:18:03,802 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 06:18:03,804 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:18:03" (1/1) ... [2022-04-05 06:18:03,805 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 06:18:03,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 06:18:03 BasicIcfg [2022-04-05 06:18:03,820 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 06:18:03,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 06:18:03,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 06:18:03,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 06:18:03,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 06:18:03" (1/4) ... [2022-04-05 06:18:03,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2c9655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 06:18:03, skipping insertion in model container [2022-04-05 06:18:03,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:18:03" (2/4) ... [2022-04-05 06:18:03,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2c9655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 06:18:03, skipping insertion in model container [2022-04-05 06:18:03,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:18:03" (3/4) ... [2022-04-05 06:18:03,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2c9655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 06:18:03, skipping insertion in model container [2022-04-05 06:18:03,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 06:18:03" (4/4) ... [2022-04-05 06:18:03,856 INFO L111 eAbstractionObserver]: Analyzing ICFG watermelon.cqvasr [2022-04-05 06:18:03,860 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 06:18:03,860 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 06:18:03,896 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 06:18:03,900 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 06:18:03,901 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 06:18:03,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 06:18:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 06:18:03,919 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:03,920 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:03,920 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:03,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:03,926 INFO L85 PathProgramCache]: Analyzing trace with hash -405319789, now seen corresponding path program 1 times [2022-04-05 06:18:03,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:03,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694437956] [2022-04-05 06:18:03,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:03,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-05 06:18:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:04,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:04,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694437956] [2022-04-05 06:18:04,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694437956] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:18:04,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:18:04,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-05 06:18:04,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769042232] [2022-04-05 06:18:04,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:18:04,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 06:18:04,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:04,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 06:18:04,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-04-05 06:18:04,307 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:04,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:04,715 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2022-04-05 06:18:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 06:18:04,717 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-04-05 06:18:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:04,722 INFO L225 Difference]: With dead ends: 91 [2022-04-05 06:18:04,722 INFO L226 Difference]: Without dead ends: 42 [2022-04-05 06:18:04,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-04-05 06:18:04,727 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:04,728 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 89 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:04,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-05 06:18:04,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-04-05 06:18:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:18:04,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-04-05 06:18:04,772 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2022-04-05 06:18:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:04,772 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-04-05 06:18:04,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-04-05 06:18:04,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 06:18:04,773 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:04,773 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:04,774 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 06:18:04,774 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:04,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1050440486, now seen corresponding path program 1 times [2022-04-05 06:18:04,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:04,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469938210] [2022-04-05 06:18:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:04,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-05 06:18:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:04,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:04,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469938210] [2022-04-05 06:18:04,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469938210] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:18:04,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:18:04,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 06:18:04,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121829193] [2022-04-05 06:18:04,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:18:04,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 06:18:04,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:04,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 06:18:04,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 06:18:04,840 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:18:04,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:04,885 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-04-05 06:18:04,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 06:18:04,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-04-05 06:18:04,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:04,886 INFO L225 Difference]: With dead ends: 55 [2022-04-05 06:18:04,887 INFO L226 Difference]: Without dead ends: 42 [2022-04-05 06:18:04,887 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:18:04,888 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:04,888 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:18:04,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-05 06:18:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-04-05 06:18:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:18:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-04-05 06:18:04,894 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 27 [2022-04-05 06:18:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:04,894 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-04-05 06:18:04,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:18:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-04-05 06:18:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 06:18:04,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:04,895 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:04,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 06:18:04,895 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:04,896 INFO L85 PathProgramCache]: Analyzing trace with hash -525796213, now seen corresponding path program 1 times [2022-04-05 06:18:04,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:04,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968716151] [2022-04-05 06:18:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:04,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-05 06:18:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:04,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:04,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968716151] [2022-04-05 06:18:04,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968716151] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:18:04,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:18:04,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 06:18:04,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001764662] [2022-04-05 06:18:04,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:18:04,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 06:18:04,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:04,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 06:18:04,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 06:18:04,971 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:05,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:05,029 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-04-05 06:18:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 06:18:05,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-04-05 06:18:05,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:05,030 INFO L225 Difference]: With dead ends: 72 [2022-04-05 06:18:05,030 INFO L226 Difference]: Without dead ends: 43 [2022-04-05 06:18:05,031 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:18:05,032 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:05,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:18:05,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-05 06:18:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-04-05 06:18:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:18:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-04-05 06:18:05,038 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 27 [2022-04-05 06:18:05,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:05,038 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-04-05 06:18:05,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-04-05 06:18:05,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 06:18:05,039 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:05,039 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:05,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 06:18:05,040 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:05,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:05,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1887910336, now seen corresponding path program 1 times [2022-04-05 06:18:05,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:05,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677899216] [2022-04-05 06:18:05,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:05,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:05,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:05,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:05,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-05 06:18:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:05,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:05,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677899216] [2022-04-05 06:18:05,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677899216] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:05,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688589605] [2022-04-05 06:18:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:05,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:05,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:05,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:05,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 06:18:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:05,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 06:18:05,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 06:18:05,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 06:18:05,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688589605] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:18:05,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 06:18:05,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2022-04-05 06:18:05,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374172847] [2022-04-05 06:18:05,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:18:05,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 06:18:05,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:05,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 06:18:05,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-04-05 06:18:05,436 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:05,511 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-04-05 06:18:05,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 06:18:05,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-04-05 06:18:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:05,513 INFO L225 Difference]: With dead ends: 56 [2022-04-05 06:18:05,513 INFO L226 Difference]: Without dead ends: 45 [2022-04-05 06:18:05,514 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-04-05 06:18:05,520 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:05,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 125 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:18:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-05 06:18:05,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-04-05 06:18:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:18:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-04-05 06:18:05,534 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2022-04-05 06:18:05,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:05,534 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-04-05 06:18:05,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:05,536 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-04-05 06:18:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 06:18:05,536 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:05,536 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:05,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:05,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:05,755 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:05,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:05,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1183994556, now seen corresponding path program 1 times [2022-04-05 06:18:05,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:05,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866795268] [2022-04-05 06:18:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:05,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:05,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:05,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:05,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-05 06:18:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:05,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:05,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866795268] [2022-04-05 06:18:05,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866795268] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:05,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498644731] [2022-04-05 06:18:05,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:05,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:05,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:05,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:05,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 06:18:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:05,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 06:18:05,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:05,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:06,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498644731] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:06,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:06,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-04-05 06:18:06,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268757976] [2022-04-05 06:18:06,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:06,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 06:18:06,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:06,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 06:18:06,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-04-05 06:18:06,038 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:06,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:06,124 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-04-05 06:18:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 06:18:06,124 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-04-05 06:18:06,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:06,125 INFO L225 Difference]: With dead ends: 74 [2022-04-05 06:18:06,125 INFO L226 Difference]: Without dead ends: 45 [2022-04-05 06:18:06,125 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-05 06:18:06,125 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:06,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 38 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:18:06,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-05 06:18:06,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-04-05 06:18:06,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:18:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-04-05 06:18:06,130 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 29 [2022-04-05 06:18:06,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:06,131 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-04-05 06:18:06,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:18:06,131 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-04-05 06:18:06,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 06:18:06,131 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:06,131 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:06,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:06,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:06,365 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:06,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1942557629, now seen corresponding path program 2 times [2022-04-05 06:18:06,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:06,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205755422] [2022-04-05 06:18:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:06,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:06,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:06,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:06,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-05 06:18:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:18:06,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:06,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205755422] [2022-04-05 06:18:06,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205755422] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:18:06,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:18:06,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-05 06:18:06,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831619537] [2022-04-05 06:18:06,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:18:06,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 06:18:06,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:06,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 06:18:06,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-05 06:18:06,472 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:06,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:06,610 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-04-05 06:18:06,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 06:18:06,611 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-04-05 06:18:06,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:06,614 INFO L225 Difference]: With dead ends: 53 [2022-04-05 06:18:06,614 INFO L226 Difference]: Without dead ends: 44 [2022-04-05 06:18:06,615 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-04-05 06:18:06,615 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:06,616 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 52 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:18:06,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-05 06:18:06,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-04-05 06:18:06,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:18:06,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-04-05 06:18:06,628 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 31 [2022-04-05 06:18:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:06,629 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-04-05 06:18:06,629 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:06,630 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-04-05 06:18:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-05 06:18:06,631 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:06,631 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:06,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-05 06:18:06,631 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:06,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2136669557, now seen corresponding path program 1 times [2022-04-05 06:18:06,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:06,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033461684] [2022-04-05 06:18:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:06,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:06,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:06,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:06,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-05 06:18:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 06:18:06,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:06,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033461684] [2022-04-05 06:18:06,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033461684] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:06,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355287707] [2022-04-05 06:18:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:06,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:06,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:06,726 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:06,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 06:18:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:06,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 06:18:06,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:18:06,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:18:06,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355287707] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:06,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:06,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 11 [2022-04-05 06:18:06,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749741740] [2022-04-05 06:18:06,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:06,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 06:18:06,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:06,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 06:18:06,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-05 06:18:06,891 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 06:18:07,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:07,037 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-04-05 06:18:07,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 06:18:07,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2022-04-05 06:18:07,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:07,038 INFO L225 Difference]: With dead ends: 73 [2022-04-05 06:18:07,038 INFO L226 Difference]: Without dead ends: 50 [2022-04-05 06:18:07,039 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-04-05 06:18:07,039 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:07,039 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:18:07,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-05 06:18:07,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-04-05 06:18:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:18:07,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-04-05 06:18:07,044 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2022-04-05 06:18:07,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:07,044 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-04-05 06:18:07,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 06:18:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-04-05 06:18:07,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 06:18:07,045 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:07,045 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-05 06:18:07,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:07,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:07,260 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:07,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:07,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1468224207, now seen corresponding path program 1 times [2022-04-05 06:18:07,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:07,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727833560] [2022-04-05 06:18:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:07,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:07,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:07,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:07,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-05 06:18:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:18:07,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:07,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727833560] [2022-04-05 06:18:07,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727833560] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:07,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70074096] [2022-04-05 06:18:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:07,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:07,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:07,326 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:07,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 06:18:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:07,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 06:18:07,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:18:07,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:18:07,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70074096] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:07,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:07,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-04-05 06:18:07,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253408888] [2022-04-05 06:18:07,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:07,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 06:18:07,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:07,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 06:18:07,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-05 06:18:07,520 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:18:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:07,648 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2022-04-05 06:18:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 06:18:07,648 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-04-05 06:18:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:07,648 INFO L225 Difference]: With dead ends: 65 [2022-04-05 06:18:07,648 INFO L226 Difference]: Without dead ends: 56 [2022-04-05 06:18:07,649 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-04-05 06:18:07,649 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:07,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 46 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:18:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-05 06:18:07,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-04-05 06:18:07,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-05 06:18:07,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-04-05 06:18:07,654 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 37 [2022-04-05 06:18:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:07,655 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-04-05 06:18:07,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 06:18:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-04-05 06:18:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 06:18:07,655 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:07,656 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-05 06:18:07,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:07,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:07,871 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:07,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:07,872 INFO L85 PathProgramCache]: Analyzing trace with hash -339230256, now seen corresponding path program 1 times [2022-04-05 06:18:07,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:07,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228153135] [2022-04-05 06:18:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:07,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:07,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:07,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:07,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-05 06:18:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 06:18:07,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:07,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228153135] [2022-04-05 06:18:07,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228153135] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:18:07,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:18:07,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-05 06:18:07,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019547442] [2022-04-05 06:18:07,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:18:07,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 06:18:07,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:07,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 06:18:07,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-04-05 06:18:07,958 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:08,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:08,164 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-04-05 06:18:08,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 06:18:08,164 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-04-05 06:18:08,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:08,167 INFO L225 Difference]: With dead ends: 60 [2022-04-05 06:18:08,167 INFO L226 Difference]: Without dead ends: 54 [2022-04-05 06:18:08,167 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-04-05 06:18:08,169 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:08,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 69 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:18:08,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-05 06:18:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-04-05 06:18:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-04-05 06:18:08,181 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 37 [2022-04-05 06:18:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:08,182 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-04-05 06:18:08,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-04-05 06:18:08,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 06:18:08,185 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:08,185 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-04-05 06:18:08,185 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-05 06:18:08,185 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:08,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:08,186 INFO L85 PathProgramCache]: Analyzing trace with hash -26371531, now seen corresponding path program 2 times [2022-04-05 06:18:08,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:08,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650795123] [2022-04-05 06:18:08,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:08,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:08,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:08,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:08,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-05 06:18:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:08,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:08,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650795123] [2022-04-05 06:18:08,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650795123] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:08,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361322028] [2022-04-05 06:18:08,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:18:08,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:08,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:08,335 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:08,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 06:18:08,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:18:08,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 06:18:08,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:08,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:09,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361322028] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:09,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:09,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2022-04-05 06:18:09,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105862173] [2022-04-05 06:18:09,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:09,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-05 06:18:09,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:09,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-05 06:18:09,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-04-05 06:18:09,053 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:09,313 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2022-04-05 06:18:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 06:18:09,314 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-04-05 06:18:09,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:09,314 INFO L225 Difference]: With dead ends: 67 [2022-04-05 06:18:09,315 INFO L226 Difference]: Without dead ends: 55 [2022-04-05 06:18:09,315 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-04-05 06:18:09,316 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:09,316 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 67 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:18:09,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-05 06:18:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-04-05 06:18:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-04-05 06:18:09,320 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 39 [2022-04-05 06:18:09,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:09,320 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-04-05 06:18:09,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:09,320 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-04-05 06:18:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 06:18:09,320 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:09,321 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-04-05 06:18:09,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:09,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 06:18:09,524 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:09,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:09,524 INFO L85 PathProgramCache]: Analyzing trace with hash -315628374, now seen corresponding path program 2 times [2022-04-05 06:18:09,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:09,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413481940] [2022-04-05 06:18:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:09,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:09,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:09,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:09,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 06:18:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:09,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:09,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413481940] [2022-04-05 06:18:09,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413481940] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:09,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816369073] [2022-04-05 06:18:09,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:18:09,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:09,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:09,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:09,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 06:18:09,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:18:09,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:09,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 06:18:09,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:09,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:10,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816369073] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:10,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:10,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2022-04-05 06:18:10,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172574942] [2022-04-05 06:18:10,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:10,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-05 06:18:10,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:10,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-05 06:18:10,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-04-05 06:18:10,307 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:10,611 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2022-04-05 06:18:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 06:18:10,612 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-04-05 06:18:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:10,612 INFO L225 Difference]: With dead ends: 61 [2022-04-05 06:18:10,612 INFO L226 Difference]: Without dead ends: 51 [2022-04-05 06:18:10,613 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-04-05 06:18:10,613 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:10,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 75 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:18:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-05 06:18:10,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-05 06:18:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.105263157894737) internal successors, (42), 40 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-04-05 06:18:10,617 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 39 [2022-04-05 06:18:10,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:10,617 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-04-05 06:18:10,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-04-05 06:18:10,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 06:18:10,618 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:10,618 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:10,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:10,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:10,823 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:10,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:10,824 INFO L85 PathProgramCache]: Analyzing trace with hash -627253872, now seen corresponding path program 3 times [2022-04-05 06:18:10,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:10,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669459123] [2022-04-05 06:18:10,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:10,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:10,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:10,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:10,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 06:18:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:10,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:10,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669459123] [2022-04-05 06:18:10,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669459123] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:10,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342137104] [2022-04-05 06:18:10,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:18:10,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:10,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:11,000 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:11,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 06:18:11,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 06:18:11,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:11,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-05 06:18:11,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:11,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:11,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342137104] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:11,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:11,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-04-05 06:18:11,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001267009] [2022-04-05 06:18:11,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:11,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-05 06:18:11,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:11,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-05 06:18:11,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-04-05 06:18:11,815 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:12,283 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2022-04-05 06:18:12,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 06:18:12,283 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-04-05 06:18:12,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:12,284 INFO L225 Difference]: With dead ends: 74 [2022-04-05 06:18:12,284 INFO L226 Difference]: Without dead ends: 63 [2022-04-05 06:18:12,285 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=2501, Unknown=0, NotChecked=0, Total=2970 [2022-04-05 06:18:12,285 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:12,285 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 87 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:12,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-05 06:18:12,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2022-04-05 06:18:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-04-05 06:18:12,289 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 41 [2022-04-05 06:18:12,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:12,289 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-04-05 06:18:12,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:12,290 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-04-05 06:18:12,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 06:18:12,290 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:12,290 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:12,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:12,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:12,495 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:12,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:12,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1113193838, now seen corresponding path program 3 times [2022-04-05 06:18:12,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:12,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9546141] [2022-04-05 06:18:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:12,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:12,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:12,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:12,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 06:18:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:12,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:12,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9546141] [2022-04-05 06:18:12,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9546141] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:12,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388664722] [2022-04-05 06:18:12,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:18:12,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:12,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:12,654 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:12,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 06:18:12,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 06:18:12,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:12,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-05 06:18:12,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:12,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:13,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388664722] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:13,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:13,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-04-05 06:18:13,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455829797] [2022-04-05 06:18:13,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:13,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-05 06:18:13,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:13,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-05 06:18:13,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-04-05 06:18:13,395 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:13,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:13,850 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-04-05 06:18:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 06:18:13,851 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-04-05 06:18:13,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:13,852 INFO L225 Difference]: With dead ends: 69 [2022-04-05 06:18:13,852 INFO L226 Difference]: Without dead ends: 60 [2022-04-05 06:18:13,853 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=2501, Unknown=0, NotChecked=0, Total=2970 [2022-04-05 06:18:13,853 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 112 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:13,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 80 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:13,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-05 06:18:13,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-04-05 06:18:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-04-05 06:18:13,858 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 41 [2022-04-05 06:18:13,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:13,859 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-04-05 06:18:13,859 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-04-05 06:18:13,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 06:18:13,859 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:13,859 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:13,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:14,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 06:18:14,068 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:14,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:14,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1908139756, now seen corresponding path program 4 times [2022-04-05 06:18:14,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:14,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038879451] [2022-04-05 06:18:14,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:14,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:14,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:14,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:14,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 06:18:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:14,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:14,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038879451] [2022-04-05 06:18:14,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038879451] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:14,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013022127] [2022-04-05 06:18:14,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:18:14,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:14,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:14,259 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:14,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 06:18:14,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:18:14,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:14,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 06:18:14,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:14,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:14,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013022127] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:14,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:14,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2022-04-05 06:18:14,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677106060] [2022-04-05 06:18:14,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:14,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-05 06:18:14,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-05 06:18:14,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-04-05 06:18:14,932 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:15,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:15,316 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2022-04-05 06:18:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 06:18:15,316 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-04-05 06:18:15,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:15,317 INFO L225 Difference]: With dead ends: 71 [2022-04-05 06:18:15,317 INFO L226 Difference]: Without dead ends: 59 [2022-04-05 06:18:15,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2022-04-05 06:18:15,318 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:15,318 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 92 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:15,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-05 06:18:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-04-05 06:18:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-04-05 06:18:15,322 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 43 [2022-04-05 06:18:15,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:15,322 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-04-05 06:18:15,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:15,322 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-04-05 06:18:15,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 06:18:15,322 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:15,322 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:15,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:15,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 06:18:15,523 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:15,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:15,523 INFO L85 PathProgramCache]: Analyzing trace with hash -721594743, now seen corresponding path program 4 times [2022-04-05 06:18:15,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:15,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402101197] [2022-04-05 06:18:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:15,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:15,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:15,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:15,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 06:18:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:15,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:15,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402101197] [2022-04-05 06:18:15,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402101197] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:15,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094821153] [2022-04-05 06:18:15,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:18:15,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:15,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:15,674 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:15,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 06:18:15,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:18:15,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:15,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 06:18:15,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:15,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:16,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094821153] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:16,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:16,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2022-04-05 06:18:16,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169736680] [2022-04-05 06:18:16,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:16,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-05 06:18:16,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:16,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-05 06:18:16,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-04-05 06:18:16,340 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:16,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:16,696 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-04-05 06:18:16,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 06:18:16,696 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-04-05 06:18:16,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:16,697 INFO L225 Difference]: With dead ends: 65 [2022-04-05 06:18:16,697 INFO L226 Difference]: Without dead ends: 55 [2022-04-05 06:18:16,698 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2022-04-05 06:18:16,698 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:16,698 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 90 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:16,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-05 06:18:16,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-04-05 06:18:16,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 44 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:16,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-04-05 06:18:16,702 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 43 [2022-04-05 06:18:16,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:16,702 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-04-05 06:18:16,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:16,702 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-04-05 06:18:16,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-05 06:18:16,702 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:16,702 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:16,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:16,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-05 06:18:16,915 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:16,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:16,916 INFO L85 PathProgramCache]: Analyzing trace with hash 81089455, now seen corresponding path program 5 times [2022-04-05 06:18:16,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:16,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323053456] [2022-04-05 06:18:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:16,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:16,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:16,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:17,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 06:18:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:17,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:17,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323053456] [2022-04-05 06:18:17,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323053456] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:17,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954828994] [2022-04-05 06:18:17,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:18:17,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:17,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:17,099 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:17,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 06:18:17,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-05 06:18:17,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:17,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 06:18:17,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:17,457 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:17,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:17,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954828994] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:17,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:17,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2022-04-05 06:18:17,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343232642] [2022-04-05 06:18:17,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:17,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-05 06:18:17,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:17,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-05 06:18:17,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-04-05 06:18:17,940 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:18,395 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2022-04-05 06:18:18,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 06:18:18,395 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-04-05 06:18:18,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:18,396 INFO L225 Difference]: With dead ends: 78 [2022-04-05 06:18:18,396 INFO L226 Difference]: Without dead ends: 67 [2022-04-05 06:18:18,397 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=3301, Unknown=0, NotChecked=0, Total=3906 [2022-04-05 06:18:18,397 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:18,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 62 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:18,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-05 06:18:18,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2022-04-05 06:18:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-04-05 06:18:18,401 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 45 [2022-04-05 06:18:18,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:18,401 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-04-05 06:18:18,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:18,401 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-04-05 06:18:18,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-05 06:18:18,402 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:18,402 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:18,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:18,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-05 06:18:18,615 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:18,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:18,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1919563725, now seen corresponding path program 5 times [2022-04-05 06:18:18,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:18,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644535619] [2022-04-05 06:18:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:18,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:18,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:18,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:18,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 06:18:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:18,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:18,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644535619] [2022-04-05 06:18:18,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644535619] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:18,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481228753] [2022-04-05 06:18:18,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:18:18,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:18,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:18,810 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:18,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 06:18:18,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-05 06:18:18,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:18,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 06:18:18,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:19,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:19,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481228753] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:19,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:19,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2022-04-05 06:18:19,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528146749] [2022-04-05 06:18:19,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:19,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-05 06:18:19,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:19,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-05 06:18:19,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-04-05 06:18:19,611 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:20,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:20,108 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-04-05 06:18:20,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 06:18:20,109 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-04-05 06:18:20,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:20,109 INFO L225 Difference]: With dead ends: 73 [2022-04-05 06:18:20,109 INFO L226 Difference]: Without dead ends: 64 [2022-04-05 06:18:20,110 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=3301, Unknown=0, NotChecked=0, Total=3906 [2022-04-05 06:18:20,110 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 109 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:20,110 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 90 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:20,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-05 06:18:20,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-04-05 06:18:20,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2022-04-05 06:18:20,114 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 45 [2022-04-05 06:18:20,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:20,114 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2022-04-05 06:18:20,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2022-04-05 06:18:20,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 06:18:20,115 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:20,115 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:20,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-05 06:18:20,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-05 06:18:20,327 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:20,328 INFO L85 PathProgramCache]: Analyzing trace with hash -80791629, now seen corresponding path program 6 times [2022-04-05 06:18:20,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:20,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116131243] [2022-04-05 06:18:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:20,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:20,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:20,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:20,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 06:18:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:20,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:20,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116131243] [2022-04-05 06:18:20,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116131243] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:20,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804218436] [2022-04-05 06:18:20,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:18:20,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:20,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:20,502 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:20,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 06:18:20,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-05 06:18:20,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:20,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 06:18:20,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:20,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:21,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804218436] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:21,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:21,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2022-04-05 06:18:21,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593850710] [2022-04-05 06:18:21,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:21,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-05 06:18:21,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:21,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-05 06:18:21,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-04-05 06:18:21,266 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:21,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:21,638 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-04-05 06:18:21,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 06:18:21,639 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-04-05 06:18:21,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:21,639 INFO L225 Difference]: With dead ends: 75 [2022-04-05 06:18:21,639 INFO L226 Difference]: Without dead ends: 63 [2022-04-05 06:18:21,640 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2022-04-05 06:18:21,641 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:21,641 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 67 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:21,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-05 06:18:21,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-04-05 06:18:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-04-05 06:18:21,644 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 47 [2022-04-05 06:18:21,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:21,645 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-04-05 06:18:21,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:21,645 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-04-05 06:18:21,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 06:18:21,645 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:21,645 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:21,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-05 06:18:21,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-05 06:18:21,851 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:21,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2012129320, now seen corresponding path program 6 times [2022-04-05 06:18:21,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:21,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902661751] [2022-04-05 06:18:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:21,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:21,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:21,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:21,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 06:18:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:22,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902661751] [2022-04-05 06:18:22,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902661751] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379308763] [2022-04-05 06:18:22,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:18:22,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:22,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:22,051 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:22,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 06:18:22,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-05 06:18:22,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:22,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 06:18:22,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:22,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:22,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379308763] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:22,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:22,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2022-04-05 06:18:22,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917261534] [2022-04-05 06:18:22,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:22,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-05 06:18:22,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:22,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-05 06:18:22,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-04-05 06:18:22,732 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:23,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:23,135 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2022-04-05 06:18:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 06:18:23,135 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-04-05 06:18:23,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:23,136 INFO L225 Difference]: With dead ends: 69 [2022-04-05 06:18:23,136 INFO L226 Difference]: Without dead ends: 59 [2022-04-05 06:18:23,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2022-04-05 06:18:23,137 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:23,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 100 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:23,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-05 06:18:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-04-05 06:18:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-04-05 06:18:23,141 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 47 [2022-04-05 06:18:23,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:23,141 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-04-05 06:18:23,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:23,141 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-04-05 06:18:23,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-05 06:18:23,141 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:23,141 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:23,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:23,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:23,351 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:23,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:23,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1330071154, now seen corresponding path program 7 times [2022-04-05 06:18:23,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:23,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535332740] [2022-04-05 06:18:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:23,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:23,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:23,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:23,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 06:18:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:23,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:23,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535332740] [2022-04-05 06:18:23,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535332740] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:23,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16014899] [2022-04-05 06:18:23,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:18:23,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:23,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:23,541 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:23,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 06:18:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:23,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 06:18:23,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:23,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:24,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16014899] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:24,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:24,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2022-04-05 06:18:24,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573229697] [2022-04-05 06:18:24,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:24,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-05 06:18:24,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:24,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-05 06:18:24,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2022-04-05 06:18:24,442 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:24,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:24,967 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-04-05 06:18:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 06:18:24,969 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-04-05 06:18:24,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:24,969 INFO L225 Difference]: With dead ends: 82 [2022-04-05 06:18:24,969 INFO L226 Difference]: Without dead ends: 71 [2022-04-05 06:18:24,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=4209, Unknown=0, NotChecked=0, Total=4970 [2022-04-05 06:18:24,971 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:24,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 97 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:24,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-05 06:18:24,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-04-05 06:18:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-04-05 06:18:24,976 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 49 [2022-04-05 06:18:24,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:24,976 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-04-05 06:18:24,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:24,977 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-04-05 06:18:24,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-05 06:18:24,977 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:24,977 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:24,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:25,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:25,192 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:25,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:25,192 INFO L85 PathProgramCache]: Analyzing trace with hash 222646764, now seen corresponding path program 7 times [2022-04-05 06:18:25,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:25,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249705059] [2022-04-05 06:18:25,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:25,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:25,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:25,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:25,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 06:18:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:25,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:25,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249705059] [2022-04-05 06:18:25,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249705059] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:25,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260084225] [2022-04-05 06:18:25,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:18:25,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:25,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:25,395 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:25,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-05 06:18:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:25,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 06:18:25,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:25,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:26,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260084225] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:26,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:26,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2022-04-05 06:18:26,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491223865] [2022-04-05 06:18:26,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:26,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-05 06:18:26,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:26,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-05 06:18:26,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2022-04-05 06:18:26,286 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:26,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:26,819 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2022-04-05 06:18:26,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 06:18:26,820 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-04-05 06:18:26,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:26,820 INFO L225 Difference]: With dead ends: 77 [2022-04-05 06:18:26,820 INFO L226 Difference]: Without dead ends: 68 [2022-04-05 06:18:26,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=4209, Unknown=0, NotChecked=0, Total=4970 [2022-04-05 06:18:26,822 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 146 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:26,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 80 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:26,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-05 06:18:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2022-04-05 06:18:26,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2022-04-05 06:18:26,826 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 49 [2022-04-05 06:18:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:26,826 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2022-04-05 06:18:26,826 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:26,826 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2022-04-05 06:18:26,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-05 06:18:26,827 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:26,827 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:26,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-05 06:18:27,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:27,043 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:27,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:27,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1269581330, now seen corresponding path program 8 times [2022-04-05 06:18:27,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:27,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137683587] [2022-04-05 06:18:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:27,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:27,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:27,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:27,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 06:18:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:27,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:27,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137683587] [2022-04-05 06:18:27,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137683587] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:27,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561879586] [2022-04-05 06:18:27,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:18:27,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:27,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:27,244 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:27,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-05 06:18:27,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:18:27,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:27,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 06:18:27,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:27,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:28,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561879586] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:28,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:28,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2022-04-05 06:18:28,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165694815] [2022-04-05 06:18:28,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:28,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-05 06:18:28,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:28,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-05 06:18:28,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2022-04-05 06:18:28,099 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:28,557 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2022-04-05 06:18:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 06:18:28,559 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-05 06:18:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:28,559 INFO L225 Difference]: With dead ends: 79 [2022-04-05 06:18:28,559 INFO L226 Difference]: Without dead ends: 67 [2022-04-05 06:18:28,560 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2022-04-05 06:18:28,561 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 92 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:28,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 87 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:28,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-05 06:18:28,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2022-04-05 06:18:28,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 states have internal predecessors, (56), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-04-05 06:18:28,565 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 51 [2022-04-05 06:18:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:28,565 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-04-05 06:18:28,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-04-05 06:18:28,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-05 06:18:28,566 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:28,566 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:28,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:28,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:28,775 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:28,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:28,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1783551609, now seen corresponding path program 8 times [2022-04-05 06:18:28,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:28,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679437726] [2022-04-05 06:18:28,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:28,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:28,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:28,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:28,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 06:18:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:28,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:28,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679437726] [2022-04-05 06:18:28,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679437726] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:28,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562497039] [2022-04-05 06:18:28,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:18:28,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:28,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:28,999 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:28,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-05 06:18:29,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:18:29,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:29,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 06:18:29,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:29,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:29,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562497039] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:29,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:29,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2022-04-05 06:18:29,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302550527] [2022-04-05 06:18:29,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:29,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-05 06:18:29,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:29,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-05 06:18:29,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2022-04-05 06:18:29,773 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:30,226 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2022-04-05 06:18:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 06:18:30,226 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-04-05 06:18:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:30,227 INFO L225 Difference]: With dead ends: 73 [2022-04-05 06:18:30,227 INFO L226 Difference]: Without dead ends: 63 [2022-04-05 06:18:30,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2022-04-05 06:18:30,228 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:30,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 85 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-05 06:18:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-04-05 06:18:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-04-05 06:18:30,232 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 51 [2022-04-05 06:18:30,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:30,232 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-04-05 06:18:30,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:30,232 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-04-05 06:18:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-05 06:18:30,233 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:30,233 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:30,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:30,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:30,433 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:30,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:30,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1742757677, now seen corresponding path program 9 times [2022-04-05 06:18:30,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:30,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162717408] [2022-04-05 06:18:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:30,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:30,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:30,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:30,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 06:18:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:30,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:30,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162717408] [2022-04-05 06:18:30,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162717408] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:30,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352755108] [2022-04-05 06:18:30,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:18:30,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:30,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:30,664 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:30,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-05 06:18:30,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-04-05 06:18:30,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:30,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-05 06:18:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:31,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:31,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352755108] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:31,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:31,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2022-04-05 06:18:31,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822153860] [2022-04-05 06:18:31,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:31,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-05 06:18:31,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:31,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-05 06:18:31,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 06:18:31,672 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:32,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:32,271 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-04-05 06:18:32,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 06:18:32,271 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-04-05 06:18:32,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:32,272 INFO L225 Difference]: With dead ends: 86 [2022-04-05 06:18:32,272 INFO L226 Difference]: Without dead ends: 75 [2022-04-05 06:18:32,272 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=937, Invalid=5225, Unknown=0, NotChecked=0, Total=6162 [2022-04-05 06:18:32,273 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:32,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 87 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-05 06:18:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2022-04-05 06:18:32,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:32,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-04-05 06:18:32,277 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 53 [2022-04-05 06:18:32,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:32,277 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-04-05 06:18:32,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:32,277 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-04-05 06:18:32,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-05 06:18:32,278 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:32,278 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:32,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:32,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:32,487 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:32,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:32,488 INFO L85 PathProgramCache]: Analyzing trace with hash -733439029, now seen corresponding path program 9 times [2022-04-05 06:18:32,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:32,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010378635] [2022-04-05 06:18:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:32,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:32,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:32,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:32,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 06:18:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:32,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:32,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010378635] [2022-04-05 06:18:32,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010378635] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:32,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888759581] [2022-04-05 06:18:32,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:18:32,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:32,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:32,751 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:32,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-05 06:18:32,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-04-05 06:18:32,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:32,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-05 06:18:32,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:33,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:33,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888759581] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:33,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:33,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2022-04-05 06:18:33,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937115034] [2022-04-05 06:18:33,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:33,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-05 06:18:33,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:33,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-05 06:18:33,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 06:18:33,741 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:34,307 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-04-05 06:18:34,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 06:18:34,308 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-04-05 06:18:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:34,308 INFO L225 Difference]: With dead ends: 81 [2022-04-05 06:18:34,308 INFO L226 Difference]: Without dead ends: 72 [2022-04-05 06:18:34,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=937, Invalid=5225, Unknown=0, NotChecked=0, Total=6162 [2022-04-05 06:18:34,310 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 133 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:34,313 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 95 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-05 06:18:34,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-04-05 06:18:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:34,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-04-05 06:18:34,319 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 53 [2022-04-05 06:18:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:34,319 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-04-05 06:18:34,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-04-05 06:18:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 06:18:34,320 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:34,320 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:34,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:34,520 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-05 06:18:34,521 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:34,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:34,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1594135601, now seen corresponding path program 10 times [2022-04-05 06:18:34,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:34,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393769596] [2022-04-05 06:18:34,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:34,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:34,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:34,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:34,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 06:18:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:34,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:34,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393769596] [2022-04-05 06:18:34,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393769596] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:34,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526916343] [2022-04-05 06:18:34,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:18:34,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:34,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:34,739 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:34,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-05 06:18:34,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:18:34,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:34,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 06:18:34,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:35,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:35,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526916343] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:35,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:35,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2022-04-05 06:18:35,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941821848] [2022-04-05 06:18:35,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:35,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-05 06:18:35,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:35,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-05 06:18:35,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2022-04-05 06:18:35,725 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:36,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:36,214 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-04-05 06:18:36,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 06:18:36,215 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-04-05 06:18:36,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:36,215 INFO L225 Difference]: With dead ends: 83 [2022-04-05 06:18:36,215 INFO L226 Difference]: Without dead ends: 71 [2022-04-05 06:18:36,216 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=913, Invalid=4787, Unknown=0, NotChecked=0, Total=5700 [2022-04-05 06:18:36,216 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:36,216 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 87 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-05 06:18:36,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2022-04-05 06:18:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 57 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-04-05 06:18:36,221 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 55 [2022-04-05 06:18:36,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:36,221 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-04-05 06:18:36,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-04-05 06:18:36,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 06:18:36,221 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:36,221 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:36,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:36,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-05 06:18:36,435 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:36,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:36,436 INFO L85 PathProgramCache]: Analyzing trace with hash 985541286, now seen corresponding path program 10 times [2022-04-05 06:18:36,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:36,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326230736] [2022-04-05 06:18:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:36,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:36,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:36,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:36,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:18:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:36,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:36,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326230736] [2022-04-05 06:18:36,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326230736] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:36,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702878250] [2022-04-05 06:18:36,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:18:36,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:36,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:36,669 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:36,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-05 06:18:36,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:18:36,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:36,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 06:18:36,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:37,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:37,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702878250] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:37,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:37,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2022-04-05 06:18:37,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665217602] [2022-04-05 06:18:37,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:37,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-05 06:18:37,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:37,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-05 06:18:37,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2022-04-05 06:18:37,572 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:38,067 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-04-05 06:18:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 06:18:38,068 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-04-05 06:18:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:38,069 INFO L225 Difference]: With dead ends: 77 [2022-04-05 06:18:38,069 INFO L226 Difference]: Without dead ends: 67 [2022-04-05 06:18:38,070 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=913, Invalid=4787, Unknown=0, NotChecked=0, Total=5700 [2022-04-05 06:18:38,070 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 107 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:38,070 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 95 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:38,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-05 06:18:38,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-04-05 06:18:38,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 56 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-04-05 06:18:38,081 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 55 [2022-04-05 06:18:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:38,082 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-04-05 06:18:38,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:38,082 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-04-05 06:18:38,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-05 06:18:38,083 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:38,083 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:38,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-05 06:18:38,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-05 06:18:38,299 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:38,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:38,300 INFO L85 PathProgramCache]: Analyzing trace with hash -38693748, now seen corresponding path program 11 times [2022-04-05 06:18:38,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:38,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111510359] [2022-04-05 06:18:38,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:38,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:38,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:38,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:38,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:18:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:38,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:38,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111510359] [2022-04-05 06:18:38,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111510359] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:38,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51458673] [2022-04-05 06:18:38,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:18:38,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:38,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:38,555 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:38,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-05 06:18:38,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-04-05 06:18:38,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:38,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 06:18:38,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:38,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:39,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51458673] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:39,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:39,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2022-04-05 06:18:39,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415490870] [2022-04-05 06:18:39,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:39,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-05 06:18:39,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:39,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-05 06:18:39,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2022-04-05 06:18:39,635 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:40,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:40,254 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-04-05 06:18:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-05 06:18:40,254 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-04-05 06:18:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:40,254 INFO L225 Difference]: With dead ends: 90 [2022-04-05 06:18:40,254 INFO L226 Difference]: Without dead ends: 79 [2022-04-05 06:18:40,262 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3000 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1133, Invalid=6349, Unknown=0, NotChecked=0, Total=7482 [2022-04-05 06:18:40,262 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 173 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:40,262 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 82 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:40,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-05 06:18:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2022-04-05 06:18:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-04-05 06:18:40,269 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 57 [2022-04-05 06:18:40,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:40,269 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-04-05 06:18:40,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-04-05 06:18:40,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-05 06:18:40,273 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:40,273 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:40,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-05 06:18:40,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:40,483 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:40,484 INFO L85 PathProgramCache]: Analyzing trace with hash -241343126, now seen corresponding path program 11 times [2022-04-05 06:18:40,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:40,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004146038] [2022-04-05 06:18:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:40,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:40,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:40,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:40,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:18:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:40,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:40,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004146038] [2022-04-05 06:18:40,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004146038] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:40,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619573665] [2022-04-05 06:18:40,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:18:40,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:40,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:40,752 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:40,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-05 06:18:40,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-04-05 06:18:40,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:40,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 06:18:40,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:41,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:41,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619573665] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:41,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:41,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2022-04-05 06:18:41,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928249641] [2022-04-05 06:18:41,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:41,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-05 06:18:41,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:41,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-05 06:18:41,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2022-04-05 06:18:41,800 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:42,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:42,413 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2022-04-05 06:18:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-05 06:18:42,413 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-04-05 06:18:42,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:42,414 INFO L225 Difference]: With dead ends: 85 [2022-04-05 06:18:42,414 INFO L226 Difference]: Without dead ends: 76 [2022-04-05 06:18:42,414 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3008 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1133, Invalid=6349, Unknown=0, NotChecked=0, Total=7482 [2022-04-05 06:18:42,415 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:42,415 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 90 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:42,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-05 06:18:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-04-05 06:18:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.1) internal successors, (66), 62 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-04-05 06:18:42,419 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 57 [2022-04-05 06:18:42,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:42,420 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-04-05 06:18:42,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:42,420 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-04-05 06:18:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-05 06:18:42,420 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:42,420 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:42,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-05 06:18:42,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-05 06:18:42,631 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:42,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:42,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2051895824, now seen corresponding path program 12 times [2022-04-05 06:18:42,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:42,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983919333] [2022-04-05 06:18:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:42,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:42,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:42,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:42,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 06:18:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:42,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:42,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983919333] [2022-04-05 06:18:42,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983919333] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:42,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165217959] [2022-04-05 06:18:42,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:18:42,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:42,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:42,916 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:42,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-05 06:18:42,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-05 06:18:42,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:42,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 06:18:42,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:43,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:44,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165217959] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:44,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:44,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2022-04-05 06:18:44,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683133500] [2022-04-05 06:18:44,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:44,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-05 06:18:44,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:44,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-05 06:18:44,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2022-04-05 06:18:44,024 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:44,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:44,543 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2022-04-05 06:18:44,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 06:18:44,543 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-04-05 06:18:44,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:44,544 INFO L225 Difference]: With dead ends: 87 [2022-04-05 06:18:44,544 INFO L226 Difference]: Without dead ends: 75 [2022-04-05 06:18:44,544 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2919 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1111, Invalid=5861, Unknown=0, NotChecked=0, Total=6972 [2022-04-05 06:18:44,545 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 100 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:44,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 77 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:44,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-05 06:18:44,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2022-04-05 06:18:44,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-04-05 06:18:44,553 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 59 [2022-04-05 06:18:44,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:44,554 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-04-05 06:18:44,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:44,554 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-04-05 06:18:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-05 06:18:44,555 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:44,555 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:44,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:44,772 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:44,772 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:44,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:44,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1297808261, now seen corresponding path program 12 times [2022-04-05 06:18:44,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:44,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418606589] [2022-04-05 06:18:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:44,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:44,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:44,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:44,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:18:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:45,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:45,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418606589] [2022-04-05 06:18:45,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418606589] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:45,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091211526] [2022-04-05 06:18:45,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:18:45,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:45,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:45,060 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:45,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-05 06:18:45,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-05 06:18:45,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:45,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 06:18:45,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:45,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:46,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091211526] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:46,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:46,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2022-04-05 06:18:46,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612890785] [2022-04-05 06:18:46,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:46,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-05 06:18:46,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:46,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-05 06:18:46,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2022-04-05 06:18:46,052 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:46,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:46,564 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2022-04-05 06:18:46,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 06:18:46,564 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-04-05 06:18:46,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:46,564 INFO L225 Difference]: With dead ends: 81 [2022-04-05 06:18:46,564 INFO L226 Difference]: Without dead ends: 71 [2022-04-05 06:18:46,565 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2872 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1111, Invalid=5861, Unknown=0, NotChecked=0, Total=6972 [2022-04-05 06:18:46,566 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 122 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:46,566 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 85 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:46,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-05 06:18:46,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-04-05 06:18:46,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 60 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:46,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-04-05 06:18:46,570 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 59 [2022-04-05 06:18:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:46,570 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-04-05 06:18:46,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-04-05 06:18:46,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-05 06:18:46,571 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:46,571 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:46,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-05 06:18:46,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-05 06:18:46,787 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:46,788 INFO L85 PathProgramCache]: Analyzing trace with hash -597841493, now seen corresponding path program 13 times [2022-04-05 06:18:46,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:46,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745623107] [2022-04-05 06:18:46,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:46,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:46,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:46,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:46,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:18:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:47,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:47,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745623107] [2022-04-05 06:18:47,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745623107] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:47,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164733694] [2022-04-05 06:18:47,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:18:47,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:47,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:47,056 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:47,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-05 06:18:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:47,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 06:18:47,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:47,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:48,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164733694] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:48,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:48,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2022-04-05 06:18:48,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338512388] [2022-04-05 06:18:48,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:48,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-05 06:18:48,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:48,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-05 06:18:48,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2022-04-05 06:18:48,288 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:48,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:48,973 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-04-05 06:18:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-05 06:18:48,973 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-04-05 06:18:48,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:48,974 INFO L225 Difference]: With dead ends: 94 [2022-04-05 06:18:48,974 INFO L226 Difference]: Without dead ends: 83 [2022-04-05 06:18:48,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3671 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1349, Invalid=7581, Unknown=0, NotChecked=0, Total=8930 [2022-04-05 06:18:48,975 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 186 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:48,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 82 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-05 06:18:48,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2022-04-05 06:18:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 63 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-04-05 06:18:48,980 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 61 [2022-04-05 06:18:48,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:48,980 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-04-05 06:18:48,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:48,980 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-04-05 06:18:48,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-05 06:18:48,980 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:48,981 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:49,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:49,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:49,191 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:49,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:49,192 INFO L85 PathProgramCache]: Analyzing trace with hash -2059862327, now seen corresponding path program 13 times [2022-04-05 06:18:49,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:49,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400152028] [2022-04-05 06:18:49,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:49,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:49,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:49,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:49,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:18:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:49,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:49,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400152028] [2022-04-05 06:18:49,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400152028] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:49,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731364561] [2022-04-05 06:18:49,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:18:49,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:49,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:49,479 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:49,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-05 06:18:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:49,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 06:18:49,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:49,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:50,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731364561] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:50,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:50,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2022-04-05 06:18:50,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135357838] [2022-04-05 06:18:50,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:50,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-05 06:18:50,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:50,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-05 06:18:50,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2022-04-05 06:18:50,694 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:51,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:51,329 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2022-04-05 06:18:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-05 06:18:51,330 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-04-05 06:18:51,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:51,331 INFO L225 Difference]: With dead ends: 89 [2022-04-05 06:18:51,331 INFO L226 Difference]: Without dead ends: 80 [2022-04-05 06:18:51,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3680 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1349, Invalid=7581, Unknown=0, NotChecked=0, Total=8930 [2022-04-05 06:18:51,332 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 140 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:51,332 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 75 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-05 06:18:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-04-05 06:18:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.09375) internal successors, (70), 66 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2022-04-05 06:18:51,337 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 61 [2022-04-05 06:18:51,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:51,337 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2022-04-05 06:18:51,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:51,338 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2022-04-05 06:18:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-05 06:18:51,338 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:51,338 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:51,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:51,556 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:51,556 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:51,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:51,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1788334161, now seen corresponding path program 14 times [2022-04-05 06:18:51,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:51,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149227186] [2022-04-05 06:18:51,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:51,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:51,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:51,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:51,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 06:18:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:51,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:51,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149227186] [2022-04-05 06:18:51,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149227186] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:51,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574912161] [2022-04-05 06:18:51,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:18:51,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:51,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:51,826 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:51,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-05 06:18:51,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:18:51,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:51,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 06:18:51,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:52,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:53,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574912161] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:53,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:53,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2022-04-05 06:18:53,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919630027] [2022-04-05 06:18:53,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:53,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-05 06:18:53,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:53,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-05 06:18:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2022-04-05 06:18:53,013 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:53,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:53,640 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2022-04-05 06:18:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-05 06:18:53,641 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-04-05 06:18:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:53,641 INFO L225 Difference]: With dead ends: 91 [2022-04-05 06:18:53,641 INFO L226 Difference]: Without dead ends: 79 [2022-04-05 06:18:53,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3580 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1329, Invalid=7043, Unknown=0, NotChecked=0, Total=8372 [2022-04-05 06:18:53,643 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:53,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 87 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:53,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-05 06:18:53,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2022-04-05 06:18:53,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 65 states have internal predecessors, (68), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-04-05 06:18:53,648 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 63 [2022-04-05 06:18:53,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:53,648 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-04-05 06:18:53,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:53,649 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-04-05 06:18:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-05 06:18:53,649 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:53,649 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:53,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-05 06:18:53,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:53,863 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:53,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:53,864 INFO L85 PathProgramCache]: Analyzing trace with hash -627512284, now seen corresponding path program 14 times [2022-04-05 06:18:53,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:53,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268059020] [2022-04-05 06:18:53,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:53,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:53,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:53,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:54,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:18:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:54,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:54,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268059020] [2022-04-05 06:18:54,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268059020] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:54,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609457446] [2022-04-05 06:18:54,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:18:54,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:54,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:54,174 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:54,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-05 06:18:54,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:18:54,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:54,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 06:18:54,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:54,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:55,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609457446] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:55,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:55,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2022-04-05 06:18:55,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897385754] [2022-04-05 06:18:55,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:55,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-05 06:18:55,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:55,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-05 06:18:55,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2022-04-05 06:18:55,269 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:55,828 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2022-04-05 06:18:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-05 06:18:55,828 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-04-05 06:18:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:55,829 INFO L225 Difference]: With dead ends: 85 [2022-04-05 06:18:55,829 INFO L226 Difference]: Without dead ends: 75 [2022-04-05 06:18:55,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3527 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1329, Invalid=7043, Unknown=0, NotChecked=0, Total=8372 [2022-04-05 06:18:55,830 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:55,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 70 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:55,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-05 06:18:55,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-04-05 06:18:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.064516129032258) internal successors, (66), 64 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-04-05 06:18:55,835 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 63 [2022-04-05 06:18:55,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:55,835 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-04-05 06:18:55,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:55,835 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-04-05 06:18:55,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-05 06:18:55,836 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:55,836 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:55,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-05 06:18:56,044 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-05 06:18:56,044 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:56,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:56,045 INFO L85 PathProgramCache]: Analyzing trace with hash 300019338, now seen corresponding path program 15 times [2022-04-05 06:18:56,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:56,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125247726] [2022-04-05 06:18:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:56,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:56,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:56,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:56,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:18:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:56,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:56,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125247726] [2022-04-05 06:18:56,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125247726] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:56,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651192195] [2022-04-05 06:18:56,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:18:56,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:56,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:56,321 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:56,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-05 06:18:56,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-04-05 06:18:56,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:56,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-05 06:18:56,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:56,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:18:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:57,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651192195] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:18:57,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:18:57,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2022-04-05 06:18:57,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437058612] [2022-04-05 06:18:57,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:18:57,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-05 06:18:57,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:18:57,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-05 06:18:57,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2022-04-05 06:18:57,640 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:18:58,389 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2022-04-05 06:18:58,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-05 06:18:58,389 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-04-05 06:18:58,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:18:58,390 INFO L225 Difference]: With dead ends: 98 [2022-04-05 06:18:58,390 INFO L226 Difference]: Without dead ends: 87 [2022-04-05 06:18:58,391 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4409 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1585, Invalid=8921, Unknown=0, NotChecked=0, Total=10506 [2022-04-05 06:18:58,391 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 193 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:18:58,391 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 77 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:18:58,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-05 06:18:58,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2022-04-05 06:18:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:18:58,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-04-05 06:18:58,397 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 65 [2022-04-05 06:18:58,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:18:58,397 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-04-05 06:18:58,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:18:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-04-05 06:18:58,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-05 06:18:58,398 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:18:58,398 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:18:58,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-05 06:18:58,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-05 06:18:58,603 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:18:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:18:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash -237193240, now seen corresponding path program 15 times [2022-04-05 06:18:58,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:18:58,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543369803] [2022-04-05 06:18:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:18:58,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:18:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:58,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:18:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:58,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:18:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:58,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:18:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:18:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:58,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:18:58,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543369803] [2022-04-05 06:18:58,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543369803] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:18:58,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197480121] [2022-04-05 06:18:58,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:18:58,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:18:58,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:18:58,945 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:18:58,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-05 06:18:59,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-04-05 06:18:59,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:18:59,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-05 06:18:59,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:18:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:18:59,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:00,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197480121] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:00,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:00,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2022-04-05 06:19:00,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407207958] [2022-04-05 06:19:00,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:00,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-05 06:19:00,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:00,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-05 06:19:00,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2022-04-05 06:19:00,252 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:00,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:00,952 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-04-05 06:19:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-05 06:19:00,953 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-04-05 06:19:00,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:00,953 INFO L225 Difference]: With dead ends: 93 [2022-04-05 06:19:00,953 INFO L226 Difference]: Without dead ends: 84 [2022-04-05 06:19:00,954 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4419 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1585, Invalid=8921, Unknown=0, NotChecked=0, Total=10506 [2022-04-05 06:19:00,955 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 149 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:00,955 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 75 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:19:00,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-05 06:19:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-04-05 06:19:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.088235294117647) internal successors, (74), 70 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2022-04-05 06:19:00,960 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 65 [2022-04-05 06:19:00,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:00,960 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2022-04-05 06:19:00,961 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2022-04-05 06:19:00,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-05 06:19:00,961 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:00,961 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:00,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-05 06:19:01,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:01,175 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:01,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:01,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1744968974, now seen corresponding path program 16 times [2022-04-05 06:19:01,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:01,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595800777] [2022-04-05 06:19:01,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:01,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:01,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:01,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:01,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 06:19:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:01,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:01,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595800777] [2022-04-05 06:19:01,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595800777] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:01,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370322795] [2022-04-05 06:19:01,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:19:01,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:01,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:01,462 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:01,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-05 06:19:01,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:19:01,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:01,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 06:19:01,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:02,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:02,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370322795] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:02,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:02,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2022-04-05 06:19:02,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034884588] [2022-04-05 06:19:02,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:02,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-05 06:19:02,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:02,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-05 06:19:02,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2022-04-05 06:19:02,758 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:03,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:03,469 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2022-04-05 06:19:03,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-05 06:19:03,470 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-05 06:19:03,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:03,470 INFO L225 Difference]: With dead ends: 95 [2022-04-05 06:19:03,470 INFO L226 Difference]: Without dead ends: 83 [2022-04-05 06:19:03,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4308 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1567, Invalid=8333, Unknown=0, NotChecked=0, Total=9900 [2022-04-05 06:19:03,472 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 111 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:03,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 117 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:19:03,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-05 06:19:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2022-04-05 06:19:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 69 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-04-05 06:19:03,478 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 67 [2022-04-05 06:19:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:03,478 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-04-05 06:19:03,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:03,478 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-04-05 06:19:03,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-05 06:19:03,479 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:03,479 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:03,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-05 06:19:03,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-05 06:19:03,691 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:03,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:03,692 INFO L85 PathProgramCache]: Analyzing trace with hash 592792707, now seen corresponding path program 16 times [2022-04-05 06:19:03,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:03,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275737322] [2022-04-05 06:19:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:03,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:03,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:03,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:03,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 06:19:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:04,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:04,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275737322] [2022-04-05 06:19:04,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275737322] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:04,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120380279] [2022-04-05 06:19:04,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:19:04,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:04,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:04,012 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:04,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-05 06:19:04,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:19:04,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:04,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 06:19:04,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:04,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:05,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120380279] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:05,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:05,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2022-04-05 06:19:05,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491100582] [2022-04-05 06:19:05,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:05,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-05 06:19:05,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:05,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-05 06:19:05,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2022-04-05 06:19:05,228 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:05,892 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-04-05 06:19:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-05 06:19:05,892 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-04-05 06:19:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:05,893 INFO L225 Difference]: With dead ends: 89 [2022-04-05 06:19:05,893 INFO L226 Difference]: Without dead ends: 79 [2022-04-05 06:19:05,894 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4249 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1567, Invalid=8333, Unknown=0, NotChecked=0, Total=9900 [2022-04-05 06:19:05,894 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:05,894 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 95 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:19:05,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-05 06:19:05,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-04-05 06:19:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 68 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2022-04-05 06:19:05,900 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 67 [2022-04-05 06:19:05,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:05,900 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2022-04-05 06:19:05,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:05,900 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2022-04-05 06:19:05,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-05 06:19:05,901 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:05,901 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:05,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-05 06:19:06,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-05 06:19:06,107 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:06,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:06,108 INFO L85 PathProgramCache]: Analyzing trace with hash 487043881, now seen corresponding path program 17 times [2022-04-05 06:19:06,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:06,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003819395] [2022-04-05 06:19:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:06,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:06,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:06,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:06,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 06:19:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:06,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:06,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003819395] [2022-04-05 06:19:06,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003819395] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:06,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101682631] [2022-04-05 06:19:06,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:19:06,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:06,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:06,444 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:06,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-05 06:19:06,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-04-05 06:19:06,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:06,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-05 06:19:06,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:07,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:07,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101682631] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:07,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:07,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2022-04-05 06:19:07,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373394873] [2022-04-05 06:19:07,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:07,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-05 06:19:07,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:07,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-05 06:19:07,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2022-04-05 06:19:07,918 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:08,737 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-04-05 06:19:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-05 06:19:08,737 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-04-05 06:19:08,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:08,738 INFO L225 Difference]: With dead ends: 102 [2022-04-05 06:19:08,738 INFO L226 Difference]: Without dead ends: 91 [2022-04-05 06:19:08,739 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5214 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1841, Invalid=10369, Unknown=0, NotChecked=0, Total=12210 [2022-04-05 06:19:08,740 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 199 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:08,740 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 77 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:19:08,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-05 06:19:08,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2022-04-05 06:19:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 71 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-04-05 06:19:08,759 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 69 [2022-04-05 06:19:08,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:08,760 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-04-05 06:19:08,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:08,760 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-04-05 06:19:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-05 06:19:08,760 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:08,760 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:08,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-05 06:19:08,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-05 06:19:08,975 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:08,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:08,976 INFO L85 PathProgramCache]: Analyzing trace with hash -367664953, now seen corresponding path program 17 times [2022-04-05 06:19:08,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:08,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317086256] [2022-04-05 06:19:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:08,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:09,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:09,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:09,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 06:19:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:09,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:09,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317086256] [2022-04-05 06:19:09,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317086256] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:09,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036332982] [2022-04-05 06:19:09,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:19:09,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:09,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:09,338 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:09,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-05 06:19:09,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-04-05 06:19:09,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:09,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-05 06:19:09,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:09,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:10,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036332982] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:10,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:10,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2022-04-05 06:19:10,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645021858] [2022-04-05 06:19:10,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:10,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-05 06:19:10,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:10,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-05 06:19:10,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2022-04-05 06:19:10,825 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:11,647 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2022-04-05 06:19:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-05 06:19:11,648 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-04-05 06:19:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:11,648 INFO L225 Difference]: With dead ends: 97 [2022-04-05 06:19:11,648 INFO L226 Difference]: Without dead ends: 88 [2022-04-05 06:19:11,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5225 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1841, Invalid=10369, Unknown=0, NotChecked=0, Total=12210 [2022-04-05 06:19:11,650 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:11,650 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 85 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:19:11,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-05 06:19:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2022-04-05 06:19:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 74 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2022-04-05 06:19:11,657 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 69 [2022-04-05 06:19:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:11,657 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2022-04-05 06:19:11,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2022-04-05 06:19:11,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-05 06:19:11,658 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:11,658 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:11,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-05 06:19:11,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:11,871 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:11,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:11,872 INFO L85 PathProgramCache]: Analyzing trace with hash 915704365, now seen corresponding path program 18 times [2022-04-05 06:19:11,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:11,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881565328] [2022-04-05 06:19:11,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:11,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:11,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:11,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:12,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 06:19:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:12,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:12,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881565328] [2022-04-05 06:19:12,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881565328] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:12,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751803222] [2022-04-05 06:19:12,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:19:12,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:12,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:12,203 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:12,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-05 06:19:12,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-05 06:19:12,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:12,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 06:19:12,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:12,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:13,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751803222] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:13,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:13,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2022-04-05 06:19:13,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341993014] [2022-04-05 06:19:13,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:13,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-05 06:19:13,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:13,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-05 06:19:13,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2022-04-05 06:19:13,621 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:14,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:14,326 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-04-05 06:19:14,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-05 06:19:14,326 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-04-05 06:19:14,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:14,327 INFO L225 Difference]: With dead ends: 99 [2022-04-05 06:19:14,327 INFO L226 Difference]: Without dead ends: 87 [2022-04-05 06:19:14,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5103 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1825, Invalid=9731, Unknown=0, NotChecked=0, Total=11556 [2022-04-05 06:19:14,328 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 147 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:14,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 82 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:19:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-05 06:19:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2022-04-05 06:19:14,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 73 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:14,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-04-05 06:19:14,335 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 71 [2022-04-05 06:19:14,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:14,335 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-04-05 06:19:14,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:14,335 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-04-05 06:19:14,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-05 06:19:14,335 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:14,335 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:14,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-05 06:19:14,536 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:14,536 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:14,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:14,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1765371042, now seen corresponding path program 18 times [2022-04-05 06:19:14,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:14,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82437712] [2022-04-05 06:19:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:14,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:14,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:14,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:14,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-05 06:19:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:14,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:14,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82437712] [2022-04-05 06:19:14,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82437712] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:14,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247181870] [2022-04-05 06:19:14,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:19:14,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:14,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:14,906 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:14,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-05 06:19:15,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-05 06:19:15,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:15,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 06:19:15,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:15,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:16,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247181870] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:16,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:16,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2022-04-05 06:19:16,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24888255] [2022-04-05 06:19:16,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:16,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-05 06:19:16,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:16,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-05 06:19:16,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2022-04-05 06:19:16,282 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:16,966 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2022-04-05 06:19:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-05 06:19:16,966 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-04-05 06:19:16,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:16,967 INFO L225 Difference]: With dead ends: 93 [2022-04-05 06:19:16,967 INFO L226 Difference]: Without dead ends: 83 [2022-04-05 06:19:16,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5038 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1825, Invalid=9731, Unknown=0, NotChecked=0, Total=11556 [2022-04-05 06:19:16,968 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 120 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:16,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 90 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:19:16,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-05 06:19:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-04-05 06:19:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 72 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-04-05 06:19:16,975 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 71 [2022-04-05 06:19:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:16,976 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-04-05 06:19:16,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-04-05 06:19:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-05 06:19:16,977 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:16,977 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:16,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-05 06:19:17,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-04-05 06:19:17,191 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:17,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:17,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2053392264, now seen corresponding path program 19 times [2022-04-05 06:19:17,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:17,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194219117] [2022-04-05 06:19:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:17,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:17,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:17,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:17,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-05 06:19:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:17,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:17,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194219117] [2022-04-05 06:19:17,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194219117] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:17,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126679550] [2022-04-05 06:19:17,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:19:17,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:17,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:17,525 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:17,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-05 06:19:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:17,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-05 06:19:17,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:18,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:19,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126679550] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:19,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:19,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2022-04-05 06:19:19,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772813541] [2022-04-05 06:19:19,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:19,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-05 06:19:19,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-05 06:19:19,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2022-04-05 06:19:19,136 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:20,133 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2022-04-05 06:19:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-05 06:19:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2022-04-05 06:19:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:20,134 INFO L225 Difference]: With dead ends: 106 [2022-04-05 06:19:20,134 INFO L226 Difference]: Without dead ends: 95 [2022-04-05 06:19:20,135 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6086 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2117, Invalid=11925, Unknown=0, NotChecked=0, Total=14042 [2022-04-05 06:19:20,135 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:20,135 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 132 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:19:20,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-05 06:19:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2022-04-05 06:19:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 75 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-04-05 06:19:20,142 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 73 [2022-04-05 06:19:20,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:20,142 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-04-05 06:19:20,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:20,142 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-04-05 06:19:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-05 06:19:20,143 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:20,143 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:20,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-04-05 06:19:20,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-04-05 06:19:20,343 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:20,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:20,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1027459430, now seen corresponding path program 19 times [2022-04-05 06:19:20,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:20,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742487656] [2022-04-05 06:19:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:20,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:20,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:20,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:20,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-05 06:19:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:20,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:20,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742487656] [2022-04-05 06:19:20,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742487656] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:20,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850023699] [2022-04-05 06:19:20,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:19:20,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:20,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:20,773 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:20,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-05 06:19:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:20,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-05 06:19:20,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:21,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:22,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850023699] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:22,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:22,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2022-04-05 06:19:22,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099104784] [2022-04-05 06:19:22,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:22,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-05 06:19:22,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:22,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-05 06:19:22,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2022-04-05 06:19:22,329 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:23,184 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2022-04-05 06:19:23,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-05 06:19:23,184 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2022-04-05 06:19:23,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:23,185 INFO L225 Difference]: With dead ends: 101 [2022-04-05 06:19:23,185 INFO L226 Difference]: Without dead ends: 92 [2022-04-05 06:19:23,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6098 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2117, Invalid=11925, Unknown=0, NotChecked=0, Total=14042 [2022-04-05 06:19:23,186 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 166 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:23,186 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 95 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:19:23,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-05 06:19:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-04-05 06:19:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 78 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-04-05 06:19:23,193 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 73 [2022-04-05 06:19:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:23,193 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-04-05 06:19:23,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:23,193 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-04-05 06:19:23,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-05 06:19:23,194 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:23,194 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:23,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-05 06:19:23,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-05 06:19:23,407 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1600440076, now seen corresponding path program 20 times [2022-04-05 06:19:23,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:23,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775387416] [2022-04-05 06:19:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:23,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:23,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:23,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:23,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-05 06:19:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:23,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:23,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775387416] [2022-04-05 06:19:23,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775387416] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:23,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434667893] [2022-04-05 06:19:23,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:19:23,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:23,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:23,772 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:23,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-05 06:19:23,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:19:23,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:23,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-05 06:19:23,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:24,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:25,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434667893] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:25,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:25,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2022-04-05 06:19:25,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245376260] [2022-04-05 06:19:25,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:25,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-05 06:19:25,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:25,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-05 06:19:25,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2022-04-05 06:19:25,305 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:26,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:26,149 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2022-04-05 06:19:26,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-05 06:19:26,149 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 75 [2022-04-05 06:19:26,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:26,150 INFO L225 Difference]: With dead ends: 103 [2022-04-05 06:19:26,150 INFO L226 Difference]: Without dead ends: 91 [2022-04-05 06:19:26,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5965 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2103, Invalid=11237, Unknown=0, NotChecked=0, Total=13340 [2022-04-05 06:19:26,151 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:26,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 117 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:19:26,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-05 06:19:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2022-04-05 06:19:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 77 states have internal predecessors, (80), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2022-04-05 06:19:26,158 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 75 [2022-04-05 06:19:26,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:26,158 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2022-04-05 06:19:26,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2022-04-05 06:19:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-05 06:19:26,159 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:26,159 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:26,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-05 06:19:26,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-05 06:19:26,373 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:26,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:26,374 INFO L85 PathProgramCache]: Analyzing trace with hash 2075827329, now seen corresponding path program 20 times [2022-04-05 06:19:26,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:26,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401096633] [2022-04-05 06:19:26,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:26,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:26,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:26,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:26,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-05 06:19:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:26,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:26,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401096633] [2022-04-05 06:19:26,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401096633] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:26,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439657432] [2022-04-05 06:19:26,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:19:26,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:26,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:26,783 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:26,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-05 06:19:26,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:19:26,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:26,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-05 06:19:26,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:27,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:28,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439657432] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:28,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:28,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2022-04-05 06:19:28,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407007907] [2022-04-05 06:19:28,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:28,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-05 06:19:28,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:28,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-05 06:19:28,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2022-04-05 06:19:28,315 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:29,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:29,096 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2022-04-05 06:19:29,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-05 06:19:29,097 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 75 [2022-04-05 06:19:29,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:29,097 INFO L225 Difference]: With dead ends: 97 [2022-04-05 06:19:29,097 INFO L226 Difference]: Without dead ends: 87 [2022-04-05 06:19:29,099 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5894 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2103, Invalid=11237, Unknown=0, NotChecked=0, Total=13340 [2022-04-05 06:19:29,099 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 141 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:29,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 95 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:19:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-05 06:19:29,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-04-05 06:19:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.054054054054054) internal successors, (78), 76 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-04-05 06:19:29,106 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 75 [2022-04-05 06:19:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:29,106 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-04-05 06:19:29,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-04-05 06:19:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-05 06:19:29,106 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:29,106 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:29,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-05 06:19:29,322 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:29,322 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:29,322 INFO L85 PathProgramCache]: Analyzing trace with hash -245826649, now seen corresponding path program 21 times [2022-04-05 06:19:29,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:29,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743849918] [2022-04-05 06:19:29,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:29,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:29,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:29,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:29,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-05 06:19:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:29,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:29,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743849918] [2022-04-05 06:19:29,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743849918] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:29,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183649842] [2022-04-05 06:19:29,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:19:29,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:29,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:29,724 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:29,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-05 06:19:29,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-04-05 06:19:29,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:29,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-05 06:19:29,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:30,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:31,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183649842] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:31,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:31,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2022-04-05 06:19:31,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608131392] [2022-04-05 06:19:31,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:31,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-05 06:19:31,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:31,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-05 06:19:31,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2022-04-05 06:19:31,528 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:32,524 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2022-04-05 06:19:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-05 06:19:32,525 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-04-05 06:19:32,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:32,525 INFO L225 Difference]: With dead ends: 110 [2022-04-05 06:19:32,525 INFO L226 Difference]: Without dead ends: 99 [2022-04-05 06:19:32,527 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7025 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2413, Invalid=13589, Unknown=0, NotChecked=0, Total=16002 [2022-04-05 06:19:32,527 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 211 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:32,527 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 87 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:19:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-04-05 06:19:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2022-04-05 06:19:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 79 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-04-05 06:19:32,534 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 77 [2022-04-05 06:19:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:32,534 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-04-05 06:19:32,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:32,534 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-04-05 06:19:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-05 06:19:32,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:32,535 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:32,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-05 06:19:32,753 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-04-05 06:19:32,753 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:32,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:32,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1685701061, now seen corresponding path program 21 times [2022-04-05 06:19:32,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:32,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852346943] [2022-04-05 06:19:32,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:32,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:32,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:32,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:32,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-05 06:19:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:33,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:33,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852346943] [2022-04-05 06:19:33,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852346943] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:33,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134360721] [2022-04-05 06:19:33,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:19:33,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:33,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:33,179 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:33,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-05 06:19:33,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-04-05 06:19:33,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:33,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-05 06:19:33,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:33,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:34,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134360721] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:34,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:34,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2022-04-05 06:19:34,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861344804] [2022-04-05 06:19:34,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:34,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-05 06:19:34,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:34,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-05 06:19:34,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2022-04-05 06:19:34,867 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:35,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:35,824 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2022-04-05 06:19:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-05 06:19:35,824 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-04-05 06:19:35,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:35,825 INFO L225 Difference]: With dead ends: 105 [2022-04-05 06:19:35,825 INFO L226 Difference]: Without dead ends: 96 [2022-04-05 06:19:35,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7038 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2413, Invalid=13589, Unknown=0, NotChecked=0, Total=16002 [2022-04-05 06:19:35,826 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 189 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:35,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 95 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:19:35,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-05 06:19:35,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-04-05 06:19:35,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 80 states have (on average 1.075) internal successors, (86), 82 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2022-04-05 06:19:35,834 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 77 [2022-04-05 06:19:35,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:35,834 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2022-04-05 06:19:35,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:35,834 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2022-04-05 06:19:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-05 06:19:35,834 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:35,834 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:35,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-05 06:19:36,044 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-05 06:19:36,044 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1484512341, now seen corresponding path program 22 times [2022-04-05 06:19:36,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:36,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847806834] [2022-04-05 06:19:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:36,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:36,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:36,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:36,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-05 06:19:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:36,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:36,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847806834] [2022-04-05 06:19:36,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847806834] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:36,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565728030] [2022-04-05 06:19:36,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:19:36,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:36,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:36,430 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:36,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-05 06:19:36,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:19:36,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:36,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-05 06:19:36,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:37,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:38,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565728030] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:38,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:38,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2022-04-05 06:19:38,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642528367] [2022-04-05 06:19:38,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:38,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-05 06:19:38,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:38,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-05 06:19:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2022-04-05 06:19:38,148 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:38,969 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2022-04-05 06:19:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-05 06:19:38,969 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 79 [2022-04-05 06:19:38,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:38,970 INFO L225 Difference]: With dead ends: 107 [2022-04-05 06:19:38,970 INFO L226 Difference]: Without dead ends: 95 [2022-04-05 06:19:38,971 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6894 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2401, Invalid=12851, Unknown=0, NotChecked=0, Total=15252 [2022-04-05 06:19:38,971 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 164 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:38,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 92 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:19:38,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-05 06:19:38,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2022-04-05 06:19:38,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 81 states have internal predecessors, (84), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-04-05 06:19:38,978 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 79 [2022-04-05 06:19:38,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:38,979 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-04-05 06:19:38,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:38,979 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-04-05 06:19:38,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-05 06:19:38,979 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:38,979 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:39,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-05 06:19:39,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-05 06:19:39,191 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:39,191 INFO L85 PathProgramCache]: Analyzing trace with hash 85601312, now seen corresponding path program 22 times [2022-04-05 06:19:39,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:39,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006484482] [2022-04-05 06:19:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:39,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:39,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:39,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:39,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-05 06:19:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:39,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:39,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006484482] [2022-04-05 06:19:39,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006484482] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:39,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784345859] [2022-04-05 06:19:39,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:19:39,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:39,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:39,622 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:39,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-05 06:19:39,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:19:39,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:39,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-05 06:19:39,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:40,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:41,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784345859] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:41,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:41,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2022-04-05 06:19:41,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151541585] [2022-04-05 06:19:41,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:41,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-05 06:19:41,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:41,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-05 06:19:41,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2022-04-05 06:19:41,258 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:42,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:42,102 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-04-05 06:19:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-05 06:19:42,102 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 79 [2022-04-05 06:19:42,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:42,102 INFO L225 Difference]: With dead ends: 101 [2022-04-05 06:19:42,102 INFO L226 Difference]: Without dead ends: 91 [2022-04-05 06:19:42,103 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6817 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2401, Invalid=12851, Unknown=0, NotChecked=0, Total=15252 [2022-04-05 06:19:42,104 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 193 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:42,104 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 95 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:19:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-05 06:19:42,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-04-05 06:19:42,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 80 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-04-05 06:19:42,115 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 79 [2022-04-05 06:19:42,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:42,115 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-04-05 06:19:42,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:42,116 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-04-05 06:19:42,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-05 06:19:42,116 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:42,116 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:42,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-04-05 06:19:42,316 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:42,317 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:42,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:42,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1592582266, now seen corresponding path program 23 times [2022-04-05 06:19:42,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:42,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613035008] [2022-04-05 06:19:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:42,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:42,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:42,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:42,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-05 06:19:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:42,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:42,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613035008] [2022-04-05 06:19:42,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613035008] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:42,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595532223] [2022-04-05 06:19:42,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:19:42,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:42,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:42,725 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:42,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-05 06:19:42,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-04-05 06:19:42,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:42,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-05 06:19:42,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:43,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:44,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595532223] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:44,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:44,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2022-04-05 06:19:44,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704467104] [2022-04-05 06:19:44,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:44,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-04-05 06:19:44,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:44,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-04-05 06:19:44,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2022-04-05 06:19:44,620 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:45,666 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2022-04-05 06:19:45,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-05 06:19:45,667 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 81 [2022-04-05 06:19:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:45,667 INFO L225 Difference]: With dead ends: 114 [2022-04-05 06:19:45,667 INFO L226 Difference]: Without dead ends: 103 [2022-04-05 06:19:45,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8031 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2729, Invalid=15361, Unknown=0, NotChecked=0, Total=18090 [2022-04-05 06:19:45,669 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 168 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:45,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 102 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:19:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-05 06:19:45,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2022-04-05 06:19:45,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:45,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-04-05 06:19:45,677 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 81 [2022-04-05 06:19:45,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:45,677 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-04-05 06:19:45,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:45,677 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-04-05 06:19:45,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-05 06:19:45,677 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:45,677 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:45,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-05 06:19:45,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:45,895 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:45,895 INFO L85 PathProgramCache]: Analyzing trace with hash -809821724, now seen corresponding path program 23 times [2022-04-05 06:19:45,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:45,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346939538] [2022-04-05 06:19:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:45,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:45,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:45,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:46,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-05 06:19:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:46,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:46,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346939538] [2022-04-05 06:19:46,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346939538] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:46,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338839857] [2022-04-05 06:19:46,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:19:46,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:46,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:46,370 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:46,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-05 06:19:46,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-04-05 06:19:46,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:46,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-05 06:19:46,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:47,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:48,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338839857] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:48,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:48,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2022-04-05 06:19:48,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816792637] [2022-04-05 06:19:48,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:48,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-04-05 06:19:48,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:48,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-04-05 06:19:48,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2022-04-05 06:19:48,290 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:49,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:49,246 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2022-04-05 06:19:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-05 06:19:49,247 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 81 [2022-04-05 06:19:49,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:49,247 INFO L225 Difference]: With dead ends: 109 [2022-04-05 06:19:49,247 INFO L226 Difference]: Without dead ends: 100 [2022-04-05 06:19:49,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8045 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2729, Invalid=15361, Unknown=0, NotChecked=0, Total=18090 [2022-04-05 06:19:49,249 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 223 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:49,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 65 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:19:49,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-05 06:19:49,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-04-05 06:19:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 86 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:49,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2022-04-05 06:19:49,257 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 81 [2022-04-05 06:19:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:49,257 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2022-04-05 06:19:49,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:49,258 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2022-04-05 06:19:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-05 06:19:49,258 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:49,258 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:49,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-04-05 06:19:49,458 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:49,459 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:49,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:49,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1204809738, now seen corresponding path program 24 times [2022-04-05 06:19:49,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:49,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351638158] [2022-04-05 06:19:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:49,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:49,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:49,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:49,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-05 06:19:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:49,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:49,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351638158] [2022-04-05 06:19:49,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351638158] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:49,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639159229] [2022-04-05 06:19:49,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:19:49,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:49,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:49,845 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:49,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-05 06:19:49,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-04-05 06:19:49,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:49,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-05 06:19:49,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:50,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:51,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639159229] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:51,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:51,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2022-04-05 06:19:51,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476603256] [2022-04-05 06:19:51,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:51,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-04-05 06:19:51,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:51,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-04-05 06:19:51,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2022-04-05 06:19:51,709 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:52,614 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2022-04-05 06:19:52,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-05 06:19:52,615 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 83 [2022-04-05 06:19:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:52,616 INFO L225 Difference]: With dead ends: 111 [2022-04-05 06:19:52,616 INFO L226 Difference]: Without dead ends: 99 [2022-04-05 06:19:52,617 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7890 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2719, Invalid=14573, Unknown=0, NotChecked=0, Total=17292 [2022-04-05 06:19:52,618 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 160 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:52,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 72 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:19:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-04-05 06:19:52,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-04-05 06:19:52,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 85 states have internal predecessors, (88), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2022-04-05 06:19:52,626 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 83 [2022-04-05 06:19:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:52,626 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2022-04-05 06:19:52,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2022-04-05 06:19:52,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-05 06:19:52,626 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:52,626 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:52,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-04-05 06:19:52,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-05 06:19:52,839 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:52,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:52,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1754961025, now seen corresponding path program 24 times [2022-04-05 06:19:52,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:52,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887865764] [2022-04-05 06:19:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:52,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:52,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:52,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:53,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-05 06:19:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:53,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:53,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887865764] [2022-04-05 06:19:53,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887865764] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:53,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463511115] [2022-04-05 06:19:53,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:19:53,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:53,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:53,319 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:53,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-05 06:19:53,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-04-05 06:19:53,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:19:53,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-05 06:19:53,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:54,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:55,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463511115] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:55,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:55,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2022-04-05 06:19:55,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020697150] [2022-04-05 06:19:55,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:55,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-04-05 06:19:55,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:55,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-04-05 06:19:55,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2022-04-05 06:19:55,103 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:56,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:56,016 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2022-04-05 06:19:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-05 06:19:56,017 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 83 [2022-04-05 06:19:56,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:56,017 INFO L225 Difference]: With dead ends: 105 [2022-04-05 06:19:56,017 INFO L226 Difference]: Without dead ends: 95 [2022-04-05 06:19:56,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7807 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2719, Invalid=14573, Unknown=0, NotChecked=0, Total=17292 [2022-04-05 06:19:56,019 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:56,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 100 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:19:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-05 06:19:56,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-04-05 06:19:56,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.048780487804878) internal successors, (86), 84 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:56,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-04-05 06:19:56,027 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 83 [2022-04-05 06:19:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:56,027 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-04-05 06:19:56,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-04-05 06:19:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-05 06:19:56,027 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:56,028 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:56,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-05 06:19:56,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-05 06:19:56,228 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:19:56,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:19:56,228 INFO L85 PathProgramCache]: Analyzing trace with hash -846462171, now seen corresponding path program 25 times [2022-04-05 06:19:56,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:19:56,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685832757] [2022-04-05 06:19:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:19:56,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:19:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:56,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:19:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:56,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:19:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:56,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-05 06:19:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:56,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:19:56,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685832757] [2022-04-05 06:19:56,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685832757] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:19:56,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825138048] [2022-04-05 06:19:56,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:19:56,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:19:56,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:19:56,685 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:19:56,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-05 06:19:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:19:56,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-05 06:19:56,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:19:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:57,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:19:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:19:58,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825138048] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:19:58,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:19:58,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2022-04-05 06:19:58,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950816566] [2022-04-05 06:19:58,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:19:58,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-04-05 06:19:58,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:19:58,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-04-05 06:19:58,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2022-04-05 06:19:58,756 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:19:59,909 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2022-04-05 06:19:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-05 06:19:59,911 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2022-04-05 06:19:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:19:59,911 INFO L225 Difference]: With dead ends: 118 [2022-04-05 06:19:59,911 INFO L226 Difference]: Without dead ends: 107 [2022-04-05 06:19:59,912 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9104 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3065, Invalid=17241, Unknown=0, NotChecked=0, Total=20306 [2022-04-05 06:19:59,913 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 195 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:19:59,913 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 92 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:19:59,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-05 06:19:59,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2022-04-05 06:19:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 87 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:19:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-04-05 06:19:59,922 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 85 [2022-04-05 06:19:59,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:19:59,922 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-04-05 06:19:59,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:19:59,922 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-04-05 06:19:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-05 06:19:59,922 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:19:59,922 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:19:59,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-04-05 06:20:00,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-04-05 06:20:00,140 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:00,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:00,140 INFO L85 PathProgramCache]: Analyzing trace with hash -222355005, now seen corresponding path program 25 times [2022-04-05 06:20:00,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:00,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066858008] [2022-04-05 06:20:00,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:00,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:00,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:00,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:00,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-05 06:20:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:00,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:00,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066858008] [2022-04-05 06:20:00,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066858008] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:00,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508183960] [2022-04-05 06:20:00,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:20:00,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:00,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:00,620 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:00,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-05 06:20:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:00,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-05 06:20:00,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:01,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:02,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508183960] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:02,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:02,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2022-04-05 06:20:02,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338135215] [2022-04-05 06:20:02,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:02,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-04-05 06:20:02,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:02,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-04-05 06:20:02,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2022-04-05 06:20:02,619 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:03,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:03,706 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2022-04-05 06:20:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-05 06:20:03,706 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2022-04-05 06:20:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:03,707 INFO L225 Difference]: With dead ends: 113 [2022-04-05 06:20:03,707 INFO L226 Difference]: Without dead ends: 104 [2022-04-05 06:20:03,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9119 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3065, Invalid=17241, Unknown=0, NotChecked=0, Total=20306 [2022-04-05 06:20:03,708 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 191 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:03,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 85 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:20:03,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-05 06:20:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-04-05 06:20:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.0681818181818181) internal successors, (94), 90 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:20:03,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2022-04-05 06:20:03,717 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 85 [2022-04-05 06:20:03,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:03,717 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2022-04-05 06:20:03,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:03,718 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2022-04-05 06:20:03,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-05 06:20:03,718 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:03,718 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:03,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-05 06:20:03,918 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-04-05 06:20:03,919 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1175356375, now seen corresponding path program 26 times [2022-04-05 06:20:03,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:03,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424641375] [2022-04-05 06:20:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:03,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:03,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:03,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:04,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-05 06:20:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:04,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:04,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424641375] [2022-04-05 06:20:04,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424641375] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:04,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672197968] [2022-04-05 06:20:04,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:20:04,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:04,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:04,350 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:04,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-05 06:20:04,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:20:04,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:04,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-05 06:20:04,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:05,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:06,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672197968] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:06,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:06,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2022-04-05 06:20:06,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556815574] [2022-04-05 06:20:06,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:06,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-04-05 06:20:06,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:06,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-04-05 06:20:06,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2022-04-05 06:20:06,424 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:07,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:07,432 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2022-04-05 06:20:07,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-05 06:20:07,432 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 87 [2022-04-05 06:20:07,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:07,433 INFO L225 Difference]: With dead ends: 115 [2022-04-05 06:20:07,433 INFO L226 Difference]: Without dead ends: 103 [2022-04-05 06:20:07,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8953 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3057, Invalid=16403, Unknown=0, NotChecked=0, Total=19460 [2022-04-05 06:20:07,435 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 146 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:07,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 102 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:20:07,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-05 06:20:07,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2022-04-05 06:20:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 89 states have internal predecessors, (92), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:20:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2022-04-05 06:20:07,454 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 87 [2022-04-05 06:20:07,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:07,454 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2022-04-05 06:20:07,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:07,454 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2022-04-05 06:20:07,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-05 06:20:07,455 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:07,455 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:07,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-05 06:20:07,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-04-05 06:20:07,655 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:07,656 INFO L85 PathProgramCache]: Analyzing trace with hash 2037754526, now seen corresponding path program 26 times [2022-04-05 06:20:07,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:07,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496315435] [2022-04-05 06:20:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:07,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:07,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:07,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:07,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-05 06:20:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:08,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:08,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496315435] [2022-04-05 06:20:08,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496315435] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:08,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693085469] [2022-04-05 06:20:08,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:20:08,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:08,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:08,134 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:08,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-05 06:20:08,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:20:08,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:08,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-05 06:20:08,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:08,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:10,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693085469] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:10,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:10,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2022-04-05 06:20:10,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071097842] [2022-04-05 06:20:10,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:10,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-04-05 06:20:10,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:10,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-04-05 06:20:10,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2022-04-05 06:20:10,025 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:11,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:11,091 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2022-04-05 06:20:11,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-05 06:20:11,092 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 87 [2022-04-05 06:20:11,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:11,092 INFO L225 Difference]: With dead ends: 109 [2022-04-05 06:20:11,092 INFO L226 Difference]: Without dead ends: 99 [2022-04-05 06:20:11,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8864 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3057, Invalid=16403, Unknown=0, NotChecked=0, Total=19460 [2022-04-05 06:20:11,095 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 142 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:11,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 130 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:20:11,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-04-05 06:20:11,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-04-05 06:20:11,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 88 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:20:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2022-04-05 06:20:11,103 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 87 [2022-04-05 06:20:11,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:11,104 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2022-04-05 06:20:11,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2022-04-05 06:20:11,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-05 06:20:11,104 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:11,104 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:11,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-04-05 06:20:11,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-05 06:20:11,305 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:11,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1820915332, now seen corresponding path program 27 times [2022-04-05 06:20:11,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:11,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811582326] [2022-04-05 06:20:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:11,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:11,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:11,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:11,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-05 06:20:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:11,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:11,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811582326] [2022-04-05 06:20:11,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811582326] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:11,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467779891] [2022-04-05 06:20:11,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:20:11,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:11,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:11,762 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:11,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-05 06:20:11,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-04-05 06:20:11,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:11,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-05 06:20:11,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:12,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:13,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467779891] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:13,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:13,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2022-04-05 06:20:13,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269639637] [2022-04-05 06:20:13,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:14,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-04-05 06:20:14,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:14,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-04-05 06:20:14,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2022-04-05 06:20:14,001 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:15,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:15,265 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-04-05 06:20:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-05 06:20:15,265 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 89 [2022-04-05 06:20:15,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:15,266 INFO L225 Difference]: With dead ends: 122 [2022-04-05 06:20:15,266 INFO L226 Difference]: Without dead ends: 111 [2022-04-05 06:20:15,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10244 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3421, Invalid=19229, Unknown=0, NotChecked=0, Total=22650 [2022-04-05 06:20:15,273 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 182 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:15,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 122 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:20:15,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-05 06:20:15,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2022-04-05 06:20:15,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 91 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:20:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-04-05 06:20:15,283 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 89 [2022-04-05 06:20:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:15,283 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-04-05 06:20:15,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:15,284 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-04-05 06:20:15,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-05 06:20:15,285 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:15,285 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:15,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-04-05 06:20:15,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:15,499 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:15,500 INFO L85 PathProgramCache]: Analyzing trace with hash 302983522, now seen corresponding path program 27 times [2022-04-05 06:20:15,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:15,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767910244] [2022-04-05 06:20:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:15,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:15,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:15,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:15,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-05 06:20:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:16,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:16,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767910244] [2022-04-05 06:20:16,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767910244] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:16,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656577462] [2022-04-05 06:20:16,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:20:16,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:16,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:16,026 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:16,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-05 06:20:16,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-04-05 06:20:16,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:16,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-05 06:20:16,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:16,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:18,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656577462] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:18,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:18,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2022-04-05 06:20:18,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357333102] [2022-04-05 06:20:18,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:18,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-04-05 06:20:18,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:18,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-04-05 06:20:18,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2022-04-05 06:20:18,175 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:19,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:19,346 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-04-05 06:20:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-05 06:20:19,347 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 89 [2022-04-05 06:20:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:19,347 INFO L225 Difference]: With dead ends: 117 [2022-04-05 06:20:19,347 INFO L226 Difference]: Without dead ends: 108 [2022-04-05 06:20:19,349 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10260 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3421, Invalid=19229, Unknown=0, NotChecked=0, Total=22650 [2022-04-05 06:20:19,350 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 215 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:19,350 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 90 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:20:19,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-04-05 06:20:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2022-04-05 06:20:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 92 states have (on average 1.065217391304348) internal successors, (98), 94 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:20:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2022-04-05 06:20:19,359 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 89 [2022-04-05 06:20:19,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:19,359 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2022-04-05 06:20:19,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2022-04-05 06:20:19,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-05 06:20:19,360 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:19,360 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:19,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-04-05 06:20:19,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:19,561 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:19,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:19,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1163794440, now seen corresponding path program 28 times [2022-04-05 06:20:19,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:19,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053788561] [2022-04-05 06:20:19,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:19,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:19,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:19,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:19,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-05 06:20:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:20,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:20,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053788561] [2022-04-05 06:20:20,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053788561] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:20,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079405317] [2022-04-05 06:20:20,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:20:20,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:20,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:20,048 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:20,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-05 06:20:20,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:20:20,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:20,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-05 06:20:20,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:20,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:22,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079405317] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:22,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:22,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2022-04-05 06:20:22,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681888924] [2022-04-05 06:20:22,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:22,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-04-05 06:20:22,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:22,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-04-05 06:20:22,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2022-04-05 06:20:22,227 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:23,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:23,237 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2022-04-05 06:20:23,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-05 06:20:23,238 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 91 [2022-04-05 06:20:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:23,238 INFO L225 Difference]: With dead ends: 119 [2022-04-05 06:20:23,238 INFO L226 Difference]: Without dead ends: 107 [2022-04-05 06:20:23,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10083 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3415, Invalid=18341, Unknown=0, NotChecked=0, Total=21756 [2022-04-05 06:20:23,240 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 172 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:23,240 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 77 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:20:23,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-05 06:20:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-04-05 06:20:23,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.054945054945055) internal successors, (96), 93 states have internal predecessors, (96), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:20:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-04-05 06:20:23,249 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 91 [2022-04-05 06:20:23,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:23,250 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-04-05 06:20:23,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-04-05 06:20:23,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-05 06:20:23,250 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:23,250 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:23,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-04-05 06:20:23,461 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:23,461 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:23,462 INFO L85 PathProgramCache]: Analyzing trace with hash 871381373, now seen corresponding path program 28 times [2022-04-05 06:20:23,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:23,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359972912] [2022-04-05 06:20:23,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:23,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:23,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:23,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:23,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-05 06:20:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:24,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:24,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359972912] [2022-04-05 06:20:24,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359972912] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:24,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054945105] [2022-04-05 06:20:24,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:20:24,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:24,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:24,008 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:24,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-05 06:20:24,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:20:24,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:24,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-05 06:20:24,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:24,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:26,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054945105] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:26,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:26,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2022-04-05 06:20:26,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734541625] [2022-04-05 06:20:26,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:26,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-04-05 06:20:26,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:26,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-04-05 06:20:26,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2022-04-05 06:20:26,167 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:27,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:27,240 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-04-05 06:20:27,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-05 06:20:27,240 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 91 [2022-04-05 06:20:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:27,241 INFO L225 Difference]: With dead ends: 113 [2022-04-05 06:20:27,241 INFO L226 Difference]: Without dead ends: 103 [2022-04-05 06:20:27,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9988 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3415, Invalid=18341, Unknown=0, NotChecked=0, Total=21756 [2022-04-05 06:20:27,243 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 178 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:27,243 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 105 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:20:27,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-05 06:20:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-04-05 06:20:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 92 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:20:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-04-05 06:20:27,253 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 91 [2022-04-05 06:20:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:27,255 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-04-05 06:20:27,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-04-05 06:20:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-05 06:20:27,255 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:27,256 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:27,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-05 06:20:27,474 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-04-05 06:20:27,474 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:27,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:27,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1922779555, now seen corresponding path program 29 times [2022-04-05 06:20:27,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:27,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087267525] [2022-04-05 06:20:27,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:27,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:27,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:27,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:27,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-05 06:20:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:27,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:27,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087267525] [2022-04-05 06:20:27,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087267525] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:27,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455916454] [2022-04-05 06:20:27,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:20:27,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:27,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:27,975 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:27,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-05 06:20:28,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-04-05 06:20:28,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:28,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-05 06:20:28,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:28,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:30,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455916454] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:30,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:30,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2022-04-05 06:20:30,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696525914] [2022-04-05 06:20:30,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:30,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-04-05 06:20:30,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:30,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-04-05 06:20:30,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2022-04-05 06:20:30,357 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:31,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:31,667 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2022-04-05 06:20:31,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-05 06:20:31,668 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 93 [2022-04-05 06:20:31,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:31,668 INFO L225 Difference]: With dead ends: 126 [2022-04-05 06:20:31,668 INFO L226 Difference]: Without dead ends: 115 [2022-04-05 06:20:31,670 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11451 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3797, Invalid=21325, Unknown=0, NotChecked=0, Total=25122 [2022-04-05 06:20:31,670 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 177 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:31,670 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 102 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:20:31,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-05 06:20:31,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-04-05 06:20:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 93 states have (on average 1.053763440860215) internal successors, (98), 95 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:20:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-04-05 06:20:31,680 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 93 [2022-04-05 06:20:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:31,680 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-04-05 06:20:31,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-04-05 06:20:31,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-05 06:20:31,681 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:31,681 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:31,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-04-05 06:20:31,881 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-04-05 06:20:31,881 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:31,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:31,881 INFO L85 PathProgramCache]: Analyzing trace with hash -805273407, now seen corresponding path program 29 times [2022-04-05 06:20:31,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:31,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522134542] [2022-04-05 06:20:31,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:31,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:31,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:31,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:32,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-05 06:20:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:32,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:32,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522134542] [2022-04-05 06:20:32,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522134542] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:32,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715945561] [2022-04-05 06:20:32,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:20:32,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:32,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:32,467 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:32,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-05 06:20:32,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-04-05 06:20:32,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:32,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-05 06:20:32,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:33,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:34,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715945561] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:34,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:34,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2022-04-05 06:20:34,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408825736] [2022-04-05 06:20:34,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:34,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-04-05 06:20:34,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:34,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-04-05 06:20:34,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2022-04-05 06:20:34,770 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:36,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:36,122 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2022-04-05 06:20:36,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-05 06:20:36,122 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 93 [2022-04-05 06:20:36,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:36,123 INFO L225 Difference]: With dead ends: 121 [2022-04-05 06:20:36,123 INFO L226 Difference]: Without dead ends: 112 [2022-04-05 06:20:36,124 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11468 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3797, Invalid=21325, Unknown=0, NotChecked=0, Total=25122 [2022-04-05 06:20:36,124 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 149 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:36,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 110 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:20:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-05 06:20:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2022-04-05 06:20:36,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 96 states have (on average 1.0625) internal successors, (102), 98 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:20:36,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2022-04-05 06:20:36,134 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 93 [2022-04-05 06:20:36,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:36,134 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2022-04-05 06:20:36,135 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2022-04-05 06:20:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-05 06:20:36,135 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:36,135 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:36,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-05 06:20:36,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:36,351 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:36,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:36,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1280775079, now seen corresponding path program 30 times [2022-04-05 06:20:36,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:36,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17332002] [2022-04-05 06:20:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:36,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:36,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:36,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:36,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-05 06:20:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:36,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:36,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17332002] [2022-04-05 06:20:36,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17332002] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:36,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703005806] [2022-04-05 06:20:36,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:20:36,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:36,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:36,828 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:36,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-05 06:20:36,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-04-05 06:20:36,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:36,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-05 06:20:36,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:37,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:39,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703005806] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:39,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:39,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2022-04-05 06:20:39,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237977090] [2022-04-05 06:20:39,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:39,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-04-05 06:20:39,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:39,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-04-05 06:20:39,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2022-04-05 06:20:39,153 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:40,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:40,326 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2022-04-05 06:20:40,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-05 06:20:40,327 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 95 [2022-04-05 06:20:40,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:40,327 INFO L225 Difference]: With dead ends: 123 [2022-04-05 06:20:40,327 INFO L226 Difference]: Without dead ends: 111 [2022-04-05 06:20:40,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11280 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3793, Invalid=20387, Unknown=0, NotChecked=0, Total=24180 [2022-04-05 06:20:40,330 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 197 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:40,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 92 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:20:40,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-05 06:20:40,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2022-04-05 06:20:40,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 97 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:20:40,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2022-04-05 06:20:40,340 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 95 [2022-04-05 06:20:40,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:40,340 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2022-04-05 06:20:40,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:40,340 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2022-04-05 06:20:40,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-05 06:20:40,341 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:40,341 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:40,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-05 06:20:40,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:40,553 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:40,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:40,553 INFO L85 PathProgramCache]: Analyzing trace with hash -565811172, now seen corresponding path program 30 times [2022-04-05 06:20:40,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:40,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389277640] [2022-04-05 06:20:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:40,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:40,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:40,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:40,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-05 06:20:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:41,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:41,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389277640] [2022-04-05 06:20:41,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389277640] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:41,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898058549] [2022-04-05 06:20:41,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:20:41,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:41,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:41,123 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:41,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-05 06:20:41,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-04-05 06:20:41,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:41,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-05 06:20:41,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:42,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:43,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898058549] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:43,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:43,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2022-04-05 06:20:43,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736002747] [2022-04-05 06:20:43,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:43,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-04-05 06:20:43,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:43,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-04-05 06:20:43,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2022-04-05 06:20:43,328 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:44,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:44,476 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2022-04-05 06:20:44,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-05 06:20:44,477 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 95 [2022-04-05 06:20:44,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:44,477 INFO L225 Difference]: With dead ends: 117 [2022-04-05 06:20:44,477 INFO L226 Difference]: Without dead ends: 107 [2022-04-05 06:20:44,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11179 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3793, Invalid=20387, Unknown=0, NotChecked=0, Total=24180 [2022-04-05 06:20:44,479 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 152 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:44,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 95 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:20:44,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-05 06:20:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-04-05 06:20:44,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 96 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:20:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2022-04-05 06:20:44,489 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 95 [2022-04-05 06:20:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:44,489 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2022-04-05 06:20:44,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2022-04-05 06:20:44,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-05 06:20:44,490 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:44,490 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:44,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-05 06:20:44,690 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-05 06:20:44,690 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:44,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:44,690 INFO L85 PathProgramCache]: Analyzing trace with hash -534754174, now seen corresponding path program 31 times [2022-04-05 06:20:44,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:44,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757016890] [2022-04-05 06:20:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:44,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:44,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:44,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:44,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-05 06:20:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:45,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:45,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757016890] [2022-04-05 06:20:45,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757016890] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:45,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689367591] [2022-04-05 06:20:45,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:20:45,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:45,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:45,210 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:45,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-05 06:20:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-05 06:20:45,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:46,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:47,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689367591] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:47,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:47,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2022-04-05 06:20:47,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496507615] [2022-04-05 06:20:47,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:47,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-04-05 06:20:47,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:47,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-04-05 06:20:47,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2022-04-05 06:20:47,820 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:49,270 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2022-04-05 06:20:49,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-05 06:20:49,271 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 97 [2022-04-05 06:20:49,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:49,271 INFO L225 Difference]: With dead ends: 130 [2022-04-05 06:20:49,271 INFO L226 Difference]: Without dead ends: 119 [2022-04-05 06:20:49,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12725 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4193, Invalid=23529, Unknown=0, NotChecked=0, Total=27722 [2022-04-05 06:20:49,273 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 165 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:49,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 127 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:20:49,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-05 06:20:49,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-04-05 06:20:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 99 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:20:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2022-04-05 06:20:49,284 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 97 [2022-04-05 06:20:49,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:49,284 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2022-04-05 06:20:49,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:49,284 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2022-04-05 06:20:49,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-05 06:20:49,284 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:49,284 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:49,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-04-05 06:20:49,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-05 06:20:49,499 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:49,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:49,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2041870304, now seen corresponding path program 31 times [2022-04-05 06:20:49,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:49,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803101885] [2022-04-05 06:20:49,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:49,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:49,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:49,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:49,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-05 06:20:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:50,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:50,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803101885] [2022-04-05 06:20:50,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803101885] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:50,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967556820] [2022-04-05 06:20:50,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:20:50,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:50,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:50,122 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:50,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-05 06:20:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:50,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-05 06:20:50,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:51,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:52,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967556820] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:52,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:52,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2022-04-05 06:20:52,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822373251] [2022-04-05 06:20:52,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:52,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-04-05 06:20:52,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:52,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-04-05 06:20:52,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2022-04-05 06:20:52,598 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:53,964 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2022-04-05 06:20:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-05 06:20:53,965 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 97 [2022-04-05 06:20:53,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:53,965 INFO L225 Difference]: With dead ends: 125 [2022-04-05 06:20:53,965 INFO L226 Difference]: Without dead ends: 116 [2022-04-05 06:20:53,967 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12743 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4193, Invalid=23529, Unknown=0, NotChecked=0, Total=27722 [2022-04-05 06:20:53,967 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 222 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:53,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 90 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:20:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-05 06:20:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-04-05 06:20:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 100 states have (on average 1.06) internal successors, (106), 102 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:20:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2022-04-05 06:20:53,979 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 97 [2022-04-05 06:20:53,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:53,980 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2022-04-05 06:20:53,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2022-04-05 06:20:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-05 06:20:53,980 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:53,980 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:54,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-05 06:20:54,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:54,198 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:54,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1491713798, now seen corresponding path program 32 times [2022-04-05 06:20:54,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:54,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11640356] [2022-04-05 06:20:54,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:54,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:54,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:54,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:54,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-05 06:20:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:54,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:54,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11640356] [2022-04-05 06:20:54,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11640356] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:54,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094410878] [2022-04-05 06:20:54,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:20:54,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:54,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:54,706 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:54,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-05 06:20:54,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:20:54,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:54,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-05 06:20:54,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:20:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:55,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:20:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:57,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094410878] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:20:57,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:20:57,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2022-04-05 06:20:57,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31190438] [2022-04-05 06:20:57,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:20:57,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-04-05 06:20:57,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:20:57,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-04-05 06:20:57,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2022-04-05 06:20:57,157 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:58,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:20:58,395 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2022-04-05 06:20:58,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-05 06:20:58,395 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 99 [2022-04-05 06:20:58,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:20:58,396 INFO L225 Difference]: With dead ends: 127 [2022-04-05 06:20:58,396 INFO L226 Difference]: Without dead ends: 115 [2022-04-05 06:20:58,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12544 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4191, Invalid=22541, Unknown=0, NotChecked=0, Total=26732 [2022-04-05 06:20:58,399 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 157 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:20:58,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 102 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:20:58,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-05 06:20:58,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-04-05 06:20:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 101 states have internal predecessors, (104), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:20:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-04-05 06:20:58,419 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 99 [2022-04-05 06:20:58,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:20:58,420 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-04-05 06:20:58,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:20:58,420 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-04-05 06:20:58,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-05 06:20:58,420 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:20:58,420 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:20:58,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-04-05 06:20:58,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-05 06:20:58,621 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:20:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:20:58,621 INFO L85 PathProgramCache]: Analyzing trace with hash 733316731, now seen corresponding path program 32 times [2022-04-05 06:20:58,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:20:58,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001796736] [2022-04-05 06:20:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:20:58,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:20:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:58,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:20:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:58,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:20:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:58,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-05 06:20:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:20:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:20:59,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:20:59,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001796736] [2022-04-05 06:20:59,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001796736] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:20:59,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493997009] [2022-04-05 06:20:59,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:20:59,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:20:59,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:20:59,244 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:20:59,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-05 06:20:59,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:20:59,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:20:59,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-05 06:20:59,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:00,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:01,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493997009] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:01,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:01,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2022-04-05 06:21:01,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982510589] [2022-04-05 06:21:01,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:01,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-04-05 06:21:01,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:01,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-04-05 06:21:01,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2022-04-05 06:21:01,673 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:02,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:02,904 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2022-04-05 06:21:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-05 06:21:02,905 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 99 [2022-04-05 06:21:02,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:02,905 INFO L225 Difference]: With dead ends: 121 [2022-04-05 06:21:02,905 INFO L226 Difference]: Without dead ends: 111 [2022-04-05 06:21:02,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12437 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4191, Invalid=22541, Unknown=0, NotChecked=0, Total=26732 [2022-04-05 06:21:02,908 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 140 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:02,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 125 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:21:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-05 06:21:02,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-04-05 06:21:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 100 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:21:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-04-05 06:21:02,919 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 99 [2022-04-05 06:21:02,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:02,919 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-04-05 06:21:02,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:02,919 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-04-05 06:21:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-05 06:21:02,920 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:02,920 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:02,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-05 06:21:03,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:03,135 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:03,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:03,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1908322527, now seen corresponding path program 33 times [2022-04-05 06:21:03,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:03,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991839474] [2022-04-05 06:21:03,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:03,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:03,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:03,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:03,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-05 06:21:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:03,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:03,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991839474] [2022-04-05 06:21:03,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991839474] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:03,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372688428] [2022-04-05 06:21:03,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:21:03,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:03,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:03,712 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:03,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-05 06:21:03,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-04-05 06:21:03,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:03,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-05 06:21:03,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:04,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:06,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372688428] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:06,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:06,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2022-04-05 06:21:06,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577070521] [2022-04-05 06:21:06,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:06,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-04-05 06:21:06,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:06,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-04-05 06:21:06,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2022-04-05 06:21:06,529 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:08,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:08,030 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2022-04-05 06:21:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-05 06:21:08,031 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 101 [2022-04-05 06:21:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:08,031 INFO L225 Difference]: With dead ends: 134 [2022-04-05 06:21:08,031 INFO L226 Difference]: Without dead ends: 123 [2022-04-05 06:21:08,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14066 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4609, Invalid=25841, Unknown=0, NotChecked=0, Total=30450 [2022-04-05 06:21:08,034 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 177 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:08,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 112 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:21:08,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-05 06:21:08,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 113. [2022-04-05 06:21:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 103 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:21:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2022-04-05 06:21:08,055 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 101 [2022-04-05 06:21:08,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:08,055 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2022-04-05 06:21:08,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:08,055 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2022-04-05 06:21:08,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-05 06:21:08,056 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:08,056 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:08,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-05 06:21:08,273 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:08,273 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:08,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:08,273 INFO L85 PathProgramCache]: Analyzing trace with hash 337141439, now seen corresponding path program 33 times [2022-04-05 06:21:08,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:08,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090666165] [2022-04-05 06:21:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:08,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:08,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:08,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:08,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-05 06:21:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:08,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:08,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090666165] [2022-04-05 06:21:08,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090666165] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:08,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249999861] [2022-04-05 06:21:08,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:21:08,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:08,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:08,933 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:08,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-05 06:21:09,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-04-05 06:21:09,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:09,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-05 06:21:09,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:10,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:11,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249999861] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:11,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:11,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2022-04-05 06:21:11,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510176663] [2022-04-05 06:21:11,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:11,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-04-05 06:21:11,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:11,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-04-05 06:21:11,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2022-04-05 06:21:11,688 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:13,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:13,238 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2022-04-05 06:21:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-05 06:21:13,239 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 101 [2022-04-05 06:21:13,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:13,239 INFO L225 Difference]: With dead ends: 129 [2022-04-05 06:21:13,239 INFO L226 Difference]: Without dead ends: 120 [2022-04-05 06:21:13,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14085 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4609, Invalid=25841, Unknown=0, NotChecked=0, Total=30450 [2022-04-05 06:21:13,241 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 168 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:13,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 120 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:21:13,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-05 06:21:13,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2022-04-05 06:21:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 104 states have (on average 1.0576923076923077) internal successors, (110), 106 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:21:13,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2022-04-05 06:21:13,253 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 101 [2022-04-05 06:21:13,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:13,253 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2022-04-05 06:21:13,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:13,253 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2022-04-05 06:21:13,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-05 06:21:13,253 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:13,253 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:13,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-04-05 06:21:13,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-04-05 06:21:13,471 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:13,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:13,472 INFO L85 PathProgramCache]: Analyzing trace with hash -370185691, now seen corresponding path program 34 times [2022-04-05 06:21:13,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:13,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023377110] [2022-04-05 06:21:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:13,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:13,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:13,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:13,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-05 06:21:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:14,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:14,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023377110] [2022-04-05 06:21:14,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023377110] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:14,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585076320] [2022-04-05 06:21:14,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:21:14,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:14,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:14,019 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:14,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-05 06:21:14,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:21:14,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:14,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-05 06:21:14,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:15,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:16,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585076320] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:16,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:16,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2022-04-05 06:21:16,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880303685] [2022-04-05 06:21:16,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:16,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-04-05 06:21:16,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:16,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-04-05 06:21:16,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2022-04-05 06:21:16,718 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:18,092 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2022-04-05 06:21:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-05 06:21:18,093 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2022-04-05 06:21:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:18,093 INFO L225 Difference]: With dead ends: 131 [2022-04-05 06:21:18,093 INFO L226 Difference]: Without dead ends: 119 [2022-04-05 06:21:18,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13875 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4609, Invalid=24803, Unknown=0, NotChecked=0, Total=29412 [2022-04-05 06:21:18,095 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 148 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:18,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 112 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:21:18,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-05 06:21:18,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2022-04-05 06:21:18,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 105 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:21:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2022-04-05 06:21:18,106 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 103 [2022-04-05 06:21:18,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:18,106 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2022-04-05 06:21:18,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:18,107 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2022-04-05 06:21:18,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-05 06:21:18,107 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:18,107 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:18,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-04-05 06:21:18,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:18,321 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash 944170138, now seen corresponding path program 34 times [2022-04-05 06:21:18,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:18,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742879031] [2022-04-05 06:21:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:18,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:18,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:18,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:18,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-05 06:21:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:18,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:18,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742879031] [2022-04-05 06:21:18,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742879031] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:18,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591159805] [2022-04-05 06:21:18,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:21:18,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:18,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:18,986 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:18,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-05 06:21:19,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:21:19,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:19,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-05 06:21:19,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:20,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:21,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591159805] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:21,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:21,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2022-04-05 06:21:21,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200280886] [2022-04-05 06:21:21,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:21,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-04-05 06:21:21,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:21,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-04-05 06:21:21,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2022-04-05 06:21:21,603 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:22,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:22,946 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2022-04-05 06:21:22,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-05 06:21:22,946 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2022-04-05 06:21:22,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:22,947 INFO L225 Difference]: With dead ends: 125 [2022-04-05 06:21:22,947 INFO L226 Difference]: Without dead ends: 115 [2022-04-05 06:21:22,948 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13762 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4609, Invalid=24803, Unknown=0, NotChecked=0, Total=29412 [2022-04-05 06:21:22,948 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 148 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:22,948 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 100 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:21:22,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-05 06:21:22,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-04-05 06:21:22,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 104 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:21:22,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-04-05 06:21:22,960 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 103 [2022-04-05 06:21:22,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:22,960 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-04-05 06:21:22,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:22,960 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-04-05 06:21:22,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-05 06:21:22,960 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:22,960 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:22,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-05 06:21:23,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:23,172 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:23,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1141661312, now seen corresponding path program 35 times [2022-04-05 06:21:23,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:23,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285653351] [2022-04-05 06:21:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:23,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:23,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:23,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:23,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-05 06:21:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:23,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:23,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285653351] [2022-04-05 06:21:23,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285653351] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:23,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142782420] [2022-04-05 06:21:23,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:21:23,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:23,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:23,766 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:23,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-05 06:21:23,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-04-05 06:21:23,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:23,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-05 06:21:23,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:25,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:26,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142782420] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:26,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:26,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2022-04-05 06:21:26,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858956821] [2022-04-05 06:21:26,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:26,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-04-05 06:21:26,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:26,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-04-05 06:21:26,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2022-04-05 06:21:26,764 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:28,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:28,434 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2022-04-05 06:21:28,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-05 06:21:28,435 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2022-04-05 06:21:28,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:28,435 INFO L225 Difference]: With dead ends: 138 [2022-04-05 06:21:28,435 INFO L226 Difference]: Without dead ends: 127 [2022-04-05 06:21:28,437 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15474 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5045, Invalid=28261, Unknown=0, NotChecked=0, Total=33306 [2022-04-05 06:21:28,437 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 209 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:28,438 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 127 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:21:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-05 06:21:28,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2022-04-05 06:21:28,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 107 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:21:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2022-04-05 06:21:28,450 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 105 [2022-04-05 06:21:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:28,450 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2022-04-05 06:21:28,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2022-04-05 06:21:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-05 06:21:28,451 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:28,451 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:28,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-05 06:21:28,668 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:28,669 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:28,669 INFO L85 PathProgramCache]: Analyzing trace with hash 686130526, now seen corresponding path program 35 times [2022-04-05 06:21:28,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:28,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188160555] [2022-04-05 06:21:28,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:28,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:28,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:28,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:28,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-05 06:21:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:29,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:29,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188160555] [2022-04-05 06:21:29,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188160555] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:29,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862231866] [2022-04-05 06:21:29,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:21:29,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:29,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:29,393 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:29,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-05 06:21:29,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-04-05 06:21:29,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:29,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-05 06:21:29,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:30,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:32,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862231866] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:32,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:32,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2022-04-05 06:21:32,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294053713] [2022-04-05 06:21:32,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:32,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-04-05 06:21:32,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:32,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-04-05 06:21:32,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2022-04-05 06:21:32,280 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:33,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:33,884 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2022-04-05 06:21:33,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-05 06:21:33,885 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2022-04-05 06:21:33,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:33,885 INFO L225 Difference]: With dead ends: 133 [2022-04-05 06:21:33,885 INFO L226 Difference]: Without dead ends: 124 [2022-04-05 06:21:33,888 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15494 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5045, Invalid=28261, Unknown=0, NotChecked=0, Total=33306 [2022-04-05 06:21:33,888 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 201 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:33,888 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 120 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:21:33,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-05 06:21:33,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2022-04-05 06:21:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 108 states have (on average 1.0555555555555556) internal successors, (114), 110 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:21:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2022-04-05 06:21:33,901 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 105 [2022-04-05 06:21:33,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:33,901 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2022-04-05 06:21:33,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2022-04-05 06:21:33,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-05 06:21:33,901 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:33,901 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:33,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-05 06:21:34,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-05 06:21:34,119 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:34,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:34,119 INFO L85 PathProgramCache]: Analyzing trace with hash 877828, now seen corresponding path program 36 times [2022-04-05 06:21:34,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:34,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447449583] [2022-04-05 06:21:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:34,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:34,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:34,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:34,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-05 06:21:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:34,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:34,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447449583] [2022-04-05 06:21:34,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447449583] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:34,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696241827] [2022-04-05 06:21:34,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:21:34,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:34,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:34,733 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:34,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-05 06:21:34,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-04-05 06:21:34,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:34,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-05 06:21:34,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:35,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:37,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696241827] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:37,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:37,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2022-04-05 06:21:37,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800917332] [2022-04-05 06:21:37,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:37,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-04-05 06:21:37,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:37,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-04-05 06:21:37,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2022-04-05 06:21:37,624 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:39,041 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2022-04-05 06:21:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-05 06:21:39,041 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 107 [2022-04-05 06:21:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:39,042 INFO L225 Difference]: With dead ends: 135 [2022-04-05 06:21:39,042 INFO L226 Difference]: Without dead ends: 123 [2022-04-05 06:21:39,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15273 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5047, Invalid=27173, Unknown=0, NotChecked=0, Total=32220 [2022-04-05 06:21:39,045 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 144 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:39,045 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 107 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:21:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-05 06:21:39,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2022-04-05 06:21:39,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 109 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:21:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2022-04-05 06:21:39,079 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 107 [2022-04-05 06:21:39,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:39,079 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2022-04-05 06:21:39,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2022-04-05 06:21:39,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-05 06:21:39,080 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:39,080 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:39,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-05 06:21:39,298 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:39,299 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:39,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:39,299 INFO L85 PathProgramCache]: Analyzing trace with hash 365941369, now seen corresponding path program 36 times [2022-04-05 06:21:39,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:39,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188891176] [2022-04-05 06:21:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:39,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:39,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:39,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:39,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-05 06:21:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:40,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:40,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188891176] [2022-04-05 06:21:40,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188891176] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:40,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724922570] [2022-04-05 06:21:40,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:21:40,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:40,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:40,070 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:40,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-05 06:21:40,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-04-05 06:21:40,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:40,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-05 06:21:40,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:41,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:42,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724922570] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:42,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:42,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2022-04-05 06:21:42,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243146954] [2022-04-05 06:21:42,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:42,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-04-05 06:21:42,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:42,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-04-05 06:21:42,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2022-04-05 06:21:42,831 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:44,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:44,246 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2022-04-05 06:21:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-05 06:21:44,246 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 107 [2022-04-05 06:21:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:44,247 INFO L225 Difference]: With dead ends: 129 [2022-04-05 06:21:44,247 INFO L226 Difference]: Without dead ends: 119 [2022-04-05 06:21:44,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15154 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5047, Invalid=27173, Unknown=0, NotChecked=0, Total=32220 [2022-04-05 06:21:44,248 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 213 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:44,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 110 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:21:44,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-05 06:21:44,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-04-05 06:21:44,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 108 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:21:44,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-04-05 06:21:44,261 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 107 [2022-04-05 06:21:44,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:44,261 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-04-05 06:21:44,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-04-05 06:21:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-05 06:21:44,261 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:44,262 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:44,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-04-05 06:21:44,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:44,462 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:44,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:44,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1526240159, now seen corresponding path program 37 times [2022-04-05 06:21:44,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:44,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181505832] [2022-04-05 06:21:44,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:44,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:44,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:44,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:44,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-05 06:21:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:45,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:45,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181505832] [2022-04-05 06:21:45,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181505832] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:45,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551010563] [2022-04-05 06:21:45,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:21:45,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:45,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:45,086 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:45,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-05 06:21:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:45,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-05 06:21:45,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:46,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:48,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551010563] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:48,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:48,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2022-04-05 06:21:48,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400399421] [2022-04-05 06:21:48,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:48,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-04-05 06:21:48,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:48,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-04-05 06:21:48,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2022-04-05 06:21:48,253 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:49,986 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2022-04-05 06:21:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-05 06:21:49,987 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 109 [2022-04-05 06:21:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:49,987 INFO L225 Difference]: With dead ends: 142 [2022-04-05 06:21:49,987 INFO L226 Difference]: Without dead ends: 131 [2022-04-05 06:21:49,990 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16949 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5501, Invalid=30789, Unknown=0, NotChecked=0, Total=36290 [2022-04-05 06:21:49,990 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 207 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:49,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 132 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:21:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-05 06:21:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2022-04-05 06:21:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 111 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:21:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-04-05 06:21:50,003 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 109 [2022-04-05 06:21:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:50,003 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-04-05 06:21:50,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-04-05 06:21:50,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-05 06:21:50,004 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:50,004 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:50,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-04-05 06:21:50,204 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-04-05 06:21:50,205 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:50,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1403075517, now seen corresponding path program 37 times [2022-04-05 06:21:50,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:50,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533746524] [2022-04-05 06:21:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:50,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:50,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:50,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:50,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-05 06:21:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:50,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:50,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533746524] [2022-04-05 06:21:50,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533746524] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:50,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093114285] [2022-04-05 06:21:50,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:21:50,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:50,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:50,967 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:50,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-05 06:21:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:51,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-05 06:21:51,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:52,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:53,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093114285] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:53,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:53,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2022-04-05 06:21:53,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033268279] [2022-04-05 06:21:53,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:53,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-04-05 06:21:53,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:53,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-04-05 06:21:53,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2022-04-05 06:21:53,992 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:55,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:21:55,603 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2022-04-05 06:21:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-05 06:21:55,604 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 109 [2022-04-05 06:21:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:21:55,604 INFO L225 Difference]: With dead ends: 137 [2022-04-05 06:21:55,604 INFO L226 Difference]: Without dead ends: 128 [2022-04-05 06:21:55,606 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16970 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5501, Invalid=30789, Unknown=0, NotChecked=0, Total=36290 [2022-04-05 06:21:55,606 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 293 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:21:55,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 90 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:21:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-05 06:21:55,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2022-04-05 06:21:55,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 112 states have (on average 1.0535714285714286) internal successors, (118), 114 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:21:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2022-04-05 06:21:55,619 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 109 [2022-04-05 06:21:55,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:21:55,620 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2022-04-05 06:21:55,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:21:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2022-04-05 06:21:55,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-05 06:21:55,620 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:21:55,620 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:21:55,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-05 06:21:55,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:55,835 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:21:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:21:55,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1790246819, now seen corresponding path program 38 times [2022-04-05 06:21:55,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:21:55,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867291499] [2022-04-05 06:21:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:21:55,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:21:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:55,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:21:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:55,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:21:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:56,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-05 06:21:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:21:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:56,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:21:56,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867291499] [2022-04-05 06:21:56,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867291499] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:21:56,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467817810] [2022-04-05 06:21:56,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:21:56,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:21:56,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:21:56,488 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:21:56,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-05 06:21:56,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:21:56,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:21:56,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-05 06:21:56,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:21:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:57,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:21:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:21:59,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467817810] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:21:59,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:21:59,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 49] total 140 [2022-04-05 06:21:59,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517368124] [2022-04-05 06:21:59,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:21:59,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-04-05 06:21:59,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:21:59,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-04-05 06:21:59,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3233, Invalid=16227, Unknown=0, NotChecked=0, Total=19460 [2022-04-05 06:21:59,564 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:01,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:01,129 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2022-04-05 06:22:01,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-05 06:22:01,130 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 111 [2022-04-05 06:22:01,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:01,130 INFO L225 Difference]: With dead ends: 139 [2022-04-05 06:22:01,130 INFO L226 Difference]: Without dead ends: 127 [2022-04-05 06:22:01,133 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16738 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5505, Invalid=29651, Unknown=0, NotChecked=0, Total=35156 [2022-04-05 06:22:01,133 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:01,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 122 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:22:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-05 06:22:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2022-04-05 06:22:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 111 states have (on average 1.045045045045045) internal successors, (116), 113 states have internal predecessors, (116), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:22:01,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2022-04-05 06:22:01,146 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 111 [2022-04-05 06:22:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:01,146 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2022-04-05 06:22:01,146 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2022-04-05 06:22:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-05 06:22:01,147 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:01,147 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:01,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-05 06:22:01,364 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:01,364 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:01,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:01,365 INFO L85 PathProgramCache]: Analyzing trace with hash 418488344, now seen corresponding path program 38 times [2022-04-05 06:22:01,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:01,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236827734] [2022-04-05 06:22:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:01,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:01,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:01,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:01,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-05 06:22:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:02,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:02,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236827734] [2022-04-05 06:22:02,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236827734] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:02,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257157799] [2022-04-05 06:22:02,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:22:02,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:02,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:02,133 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:02,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-05 06:22:02,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:22:02,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:02,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-05 06:22:02,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:03,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:05,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257157799] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:05,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:05,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 49] total 140 [2022-04-05 06:22:05,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808561895] [2022-04-05 06:22:05,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:05,116 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-04-05 06:22:05,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:05,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-04-05 06:22:05,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3233, Invalid=16227, Unknown=0, NotChecked=0, Total=19460 [2022-04-05 06:22:05,118 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:06,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:06,553 INFO L93 Difference]: Finished difference Result 133 states and 136 transitions. [2022-04-05 06:22:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-05 06:22:06,553 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 111 [2022-04-05 06:22:06,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:06,554 INFO L225 Difference]: With dead ends: 133 [2022-04-05 06:22:06,554 INFO L226 Difference]: Without dead ends: 123 [2022-04-05 06:22:06,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16613 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5505, Invalid=29651, Unknown=0, NotChecked=0, Total=35156 [2022-04-05 06:22:06,555 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 190 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:06,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 85 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:22:06,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-05 06:22:06,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-04-05 06:22:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 112 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:22:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2022-04-05 06:22:06,569 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 111 [2022-04-05 06:22:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:06,569 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2022-04-05 06:22:06,569 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2022-04-05 06:22:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-05 06:22:06,570 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:06,570 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:06,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-04-05 06:22:06,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:06,788 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:06,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:06,788 INFO L85 PathProgramCache]: Analyzing trace with hash 484275582, now seen corresponding path program 39 times [2022-04-05 06:22:06,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:06,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812308476] [2022-04-05 06:22:06,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:06,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:06,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:06,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:07,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-05 06:22:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:07,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:07,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812308476] [2022-04-05 06:22:07,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812308476] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:07,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632416878] [2022-04-05 06:22:07,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:22:07,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:07,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:07,525 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:07,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-05 06:22:07,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-04-05 06:22:07,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:07,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-05 06:22:07,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:08,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:11,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632416878] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:11,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:11,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 147 [2022-04-05 06:22:11,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929413825] [2022-04-05 06:22:11,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:11,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-04-05 06:22:11,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:11,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-04-05 06:22:11,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=17983, Unknown=0, NotChecked=0, Total=21462 [2022-04-05 06:22:11,015 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:12,798 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2022-04-05 06:22:12,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-05 06:22:12,799 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 113 [2022-04-05 06:22:12,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:12,799 INFO L225 Difference]: With dead ends: 146 [2022-04-05 06:22:12,799 INFO L226 Difference]: Without dead ends: 135 [2022-04-05 06:22:12,802 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18491 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5977, Invalid=33425, Unknown=0, NotChecked=0, Total=39402 [2022-04-05 06:22:12,803 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 229 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:12,803 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 112 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:22:12,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-05 06:22:12,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 125. [2022-04-05 06:22:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 115 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:22:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-04-05 06:22:12,817 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 113 [2022-04-05 06:22:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:12,817 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-04-05 06:22:12,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-04-05 06:22:12,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-05 06:22:12,818 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:12,818 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:12,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-04-05 06:22:13,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-04-05 06:22:13,031 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:13,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:13,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1902325284, now seen corresponding path program 39 times [2022-04-05 06:22:13,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:13,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318187845] [2022-04-05 06:22:13,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:13,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:13,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:13,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:13,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-05 06:22:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:13,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:13,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318187845] [2022-04-05 06:22:13,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318187845] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:13,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405959299] [2022-04-05 06:22:13,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:22:13,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:13,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:13,926 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:13,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-05 06:22:14,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-04-05 06:22:14,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:14,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-05 06:22:14,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:15,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:17,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405959299] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:17,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:17,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 147 [2022-04-05 06:22:17,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081313679] [2022-04-05 06:22:17,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:17,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-04-05 06:22:17,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:17,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-04-05 06:22:17,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=17983, Unknown=0, NotChecked=0, Total=21462 [2022-04-05 06:22:17,171 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:18,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:18,929 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2022-04-05 06:22:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-05 06:22:18,929 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 113 [2022-04-05 06:22:18,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:18,930 INFO L225 Difference]: With dead ends: 141 [2022-04-05 06:22:18,930 INFO L226 Difference]: Without dead ends: 132 [2022-04-05 06:22:18,932 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18513 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5977, Invalid=33425, Unknown=0, NotChecked=0, Total=39402 [2022-04-05 06:22:18,933 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 239 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:18,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 120 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:22:18,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-05 06:22:18,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2022-04-05 06:22:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 116 states have (on average 1.0517241379310345) internal successors, (122), 118 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:22:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2022-04-05 06:22:18,947 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 113 [2022-04-05 06:22:18,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:18,947 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2022-04-05 06:22:18,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:18,948 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2022-04-05 06:22:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-05 06:22:18,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:18,949 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:18,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-04-05 06:22:19,153 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:19,153 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:19,154 INFO L85 PathProgramCache]: Analyzing trace with hash -719091198, now seen corresponding path program 40 times [2022-04-05 06:22:19,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:19,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739733065] [2022-04-05 06:22:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:19,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:19,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:19,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:19,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-05 06:22:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:19,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:19,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739733065] [2022-04-05 06:22:19,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739733065] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:19,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446119946] [2022-04-05 06:22:19,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:22:19,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:19,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:19,836 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:19,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-05 06:22:20,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:22:20,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:20,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-05 06:22:20,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:21,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:23,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446119946] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:23,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:23,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51, 51] total 146 [2022-04-05 06:22:23,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133979319] [2022-04-05 06:22:23,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:23,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-04-05 06:22:23,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:23,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-04-05 06:22:23,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3517, Invalid=17653, Unknown=0, NotChecked=0, Total=21170 [2022-04-05 06:22:23,095 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:24,717 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2022-04-05 06:22:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-05 06:22:24,717 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 115 [2022-04-05 06:22:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:24,718 INFO L225 Difference]: With dead ends: 143 [2022-04-05 06:22:24,718 INFO L226 Difference]: Without dead ends: 131 [2022-04-05 06:22:24,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18270 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5983, Invalid=32237, Unknown=0, NotChecked=0, Total=38220 [2022-04-05 06:22:24,720 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 174 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:24,720 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 102 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:22:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-05 06:22:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2022-04-05 06:22:24,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 117 states have internal predecessors, (120), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:22:24,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2022-04-05 06:22:24,734 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 115 [2022-04-05 06:22:24,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:24,734 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2022-04-05 06:22:24,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:24,735 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2022-04-05 06:22:24,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-05 06:22:24,735 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:24,735 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:24,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-04-05 06:22:24,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:24,939 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:24,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:24,939 INFO L85 PathProgramCache]: Analyzing trace with hash -434528905, now seen corresponding path program 40 times [2022-04-05 06:22:24,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:24,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319138067] [2022-04-05 06:22:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:24,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:24,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:24,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:25,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-05 06:22:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:25,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:25,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319138067] [2022-04-05 06:22:25,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319138067] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:25,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407962830] [2022-04-05 06:22:25,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:22:25,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:25,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:25,756 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:25,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-05 06:22:25,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:22:25,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:25,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-05 06:22:25,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:27,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:28,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407962830] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:28,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:28,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51, 51] total 146 [2022-04-05 06:22:28,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935893824] [2022-04-05 06:22:28,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:28,859 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-04-05 06:22:28,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:28,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-04-05 06:22:28,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3517, Invalid=17653, Unknown=0, NotChecked=0, Total=21170 [2022-04-05 06:22:28,862 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:30,433 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-04-05 06:22:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-05 06:22:30,434 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 115 [2022-04-05 06:22:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:30,434 INFO L225 Difference]: With dead ends: 137 [2022-04-05 06:22:30,434 INFO L226 Difference]: Without dead ends: 127 [2022-04-05 06:22:30,437 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18139 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5983, Invalid=32237, Unknown=0, NotChecked=0, Total=38220 [2022-04-05 06:22:30,437 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 196 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:30,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 105 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:22:30,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-05 06:22:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-04-05 06:22:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 116 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:22:30,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2022-04-05 06:22:30,457 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 115 [2022-04-05 06:22:30,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:30,457 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2022-04-05 06:22:30,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:30,457 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2022-04-05 06:22:30,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-05 06:22:30,458 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:30,458 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:30,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-04-05 06:22:30,669 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-04-05 06:22:30,670 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:30,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:30,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1073452829, now seen corresponding path program 41 times [2022-04-05 06:22:30,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:30,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514056855] [2022-04-05 06:22:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:30,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:30,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:30,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:31,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-05 06:22:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:31,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:31,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514056855] [2022-04-05 06:22:31,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514056855] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:31,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106422464] [2022-04-05 06:22:31,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:22:31,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:31,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:31,389 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:31,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-05 06:22:31,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-04-05 06:22:31,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:31,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-05 06:22:31,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:32,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:34,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106422464] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:34,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:34,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 153 [2022-04-05 06:22:34,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440968202] [2022-04-05 06:22:34,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:34,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-04-05 06:22:34,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:34,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-04-05 06:22:34,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3773, Invalid=19483, Unknown=0, NotChecked=0, Total=23256 [2022-04-05 06:22:35,000 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:36,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:36,836 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2022-04-05 06:22:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-05 06:22:36,836 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 117 [2022-04-05 06:22:36,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:36,836 INFO L225 Difference]: With dead ends: 150 [2022-04-05 06:22:36,837 INFO L226 Difference]: Without dead ends: 139 [2022-04-05 06:22:36,839 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20100 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6473, Invalid=36169, Unknown=0, NotChecked=0, Total=42642 [2022-04-05 06:22:36,840 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 227 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:36,840 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 102 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:22:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-04-05 06:22:36,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2022-04-05 06:22:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 119 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:22:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2022-04-05 06:22:36,854 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 117 [2022-04-05 06:22:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:36,855 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2022-04-05 06:22:36,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2022-04-05 06:22:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-05 06:22:36,855 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:36,855 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:36,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-04-05 06:22:37,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:37,071 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:37,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:37,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1073059771, now seen corresponding path program 41 times [2022-04-05 06:22:37,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:37,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625890839] [2022-04-05 06:22:37,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:37,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:37,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:37,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:37,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-05 06:22:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:37,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:37,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625890839] [2022-04-05 06:22:37,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625890839] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:37,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181657559] [2022-04-05 06:22:37,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:22:37,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:37,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:37,987 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:37,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-05 06:22:38,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-04-05 06:22:38,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:38,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-05 06:22:38,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:39,527 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:39,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:41,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181657559] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:41,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:41,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 153 [2022-04-05 06:22:41,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598121097] [2022-04-05 06:22:41,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:41,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-04-05 06:22:41,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:41,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-04-05 06:22:41,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3773, Invalid=19483, Unknown=0, NotChecked=0, Total=23256 [2022-04-05 06:22:41,452 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:43,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:43,322 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2022-04-05 06:22:43,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-05 06:22:43,323 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 117 [2022-04-05 06:22:43,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:43,323 INFO L225 Difference]: With dead ends: 145 [2022-04-05 06:22:43,323 INFO L226 Difference]: Without dead ends: 136 [2022-04-05 06:22:43,326 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20123 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6473, Invalid=36169, Unknown=0, NotChecked=0, Total=42642 [2022-04-05 06:22:43,327 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 227 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:43,327 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 130 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:22:43,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-05 06:22:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2022-04-05 06:22:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 120 states have (on average 1.05) internal successors, (126), 122 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:22:43,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2022-04-05 06:22:43,342 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 117 [2022-04-05 06:22:43,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:43,342 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2022-04-05 06:22:43,342 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:43,342 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2022-04-05 06:22:43,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-05 06:22:43,343 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:43,343 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:43,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-04-05 06:22:43,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:43,543 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:43,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1822272479, now seen corresponding path program 42 times [2022-04-05 06:22:43,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:43,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176206585] [2022-04-05 06:22:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:43,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:43,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:43,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:43,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-05 06:22:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:44,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:44,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176206585] [2022-04-05 06:22:44,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176206585] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:44,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362446726] [2022-04-05 06:22:44,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:22:44,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:44,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:44,261 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:44,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-05 06:22:44,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-04-05 06:22:44,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:44,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-05 06:22:44,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:45,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:47,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362446726] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:47,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:47,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 53, 53] total 152 [2022-04-05 06:22:47,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726383005] [2022-04-05 06:22:47,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:47,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-04-05 06:22:47,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:47,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-04-05 06:22:47,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3813, Invalid=19139, Unknown=0, NotChecked=0, Total=22952 [2022-04-05 06:22:47,723 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:49,410 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2022-04-05 06:22:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-05 06:22:49,410 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 119 [2022-04-05 06:22:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:49,411 INFO L225 Difference]: With dead ends: 147 [2022-04-05 06:22:49,411 INFO L226 Difference]: Without dead ends: 135 [2022-04-05 06:22:49,413 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19869 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6481, Invalid=34931, Unknown=0, NotChecked=0, Total=41412 [2022-04-05 06:22:49,414 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 155 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:49,414 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 92 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:22:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-05 06:22:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-04-05 06:22:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 121 states have internal predecessors, (124), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:22:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-04-05 06:22:49,429 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 119 [2022-04-05 06:22:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:49,429 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-04-05 06:22:49,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-04-05 06:22:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-05 06:22:49,430 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:49,430 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:49,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-04-05 06:22:49,630 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-05 06:22:49,630 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:49,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:49,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1048648342, now seen corresponding path program 42 times [2022-04-05 06:22:49,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:49,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513924033] [2022-04-05 06:22:49,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:49,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:49,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:49,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:49,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-05 06:22:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:50,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:50,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513924033] [2022-04-05 06:22:50,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513924033] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:50,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542492342] [2022-04-05 06:22:50,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:22:50,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:50,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:50,511 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:50,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-05 06:22:50,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-04-05 06:22:50,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:22:50,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-05 06:22:50,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:52,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:22:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:53,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542492342] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:22:53,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:22:53,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 53, 53] total 152 [2022-04-05 06:22:53,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694062983] [2022-04-05 06:22:53,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:22:53,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-04-05 06:22:53,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:22:53,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-04-05 06:22:53,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3813, Invalid=19139, Unknown=0, NotChecked=0, Total=22952 [2022-04-05 06:22:53,797 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:22:55,428 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2022-04-05 06:22:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-05 06:22:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 119 [2022-04-05 06:22:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:22:55,429 INFO L225 Difference]: With dead ends: 141 [2022-04-05 06:22:55,429 INFO L226 Difference]: Without dead ends: 131 [2022-04-05 06:22:55,431 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19732 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6481, Invalid=34931, Unknown=0, NotChecked=0, Total=41412 [2022-04-05 06:22:55,431 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 223 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:22:55,431 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 100 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:22:55,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-05 06:22:55,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-04-05 06:22:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 120 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:22:55,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2022-04-05 06:22:55,446 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 119 [2022-04-05 06:22:55,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:22:55,446 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2022-04-05 06:22:55,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:22:55,446 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2022-04-05 06:22:55,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-05 06:22:55,447 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:22:55,447 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:22:55,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-04-05 06:22:55,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:55,647 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:22:55,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:22:55,648 INFO L85 PathProgramCache]: Analyzing trace with hash 477644924, now seen corresponding path program 43 times [2022-04-05 06:22:55,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:22:55,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127568681] [2022-04-05 06:22:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:22:55,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:22:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:55,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:22:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:55,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:22:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:56,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-05 06:22:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:56,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:22:56,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127568681] [2022-04-05 06:22:56,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127568681] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:22:56,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337872528] [2022-04-05 06:22:56,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:22:56,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:22:56,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:22:56,403 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:22:56,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-05 06:22:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:22:56,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-05 06:22:56,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:22:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:22:57,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:00,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337872528] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:00,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:00,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 159 [2022-04-05 06:23:00,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604874509] [2022-04-05 06:23:00,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:00,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-04-05 06:23:00,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-04-05 06:23:00,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4079, Invalid=21043, Unknown=0, NotChecked=0, Total=25122 [2022-04-05 06:23:00,154 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:02,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:23:02,155 INFO L93 Difference]: Finished difference Result 154 states and 161 transitions. [2022-04-05 06:23:02,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-05 06:23:02,156 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 121 [2022-04-05 06:23:02,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:23:02,156 INFO L225 Difference]: With dead ends: 154 [2022-04-05 06:23:02,156 INFO L226 Difference]: Without dead ends: 143 [2022-04-05 06:23:02,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21776 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6989, Invalid=39021, Unknown=0, NotChecked=0, Total=46010 [2022-04-05 06:23:02,159 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 170 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:23:02,159 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 112 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:23:02,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-05 06:23:02,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2022-04-05 06:23:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 123 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:23:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2022-04-05 06:23:02,175 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 121 [2022-04-05 06:23:02,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:23:02,175 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2022-04-05 06:23:02,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2022-04-05 06:23:02,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-05 06:23:02,176 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:23:02,176 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:23:02,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-04-05 06:23:02,376 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:02,376 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:02,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:02,377 INFO L85 PathProgramCache]: Analyzing trace with hash 110419290, now seen corresponding path program 43 times [2022-04-05 06:23:02,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:02,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220912001] [2022-04-05 06:23:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:02,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:02,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:02,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:02,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-05 06:23:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:03,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:03,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220912001] [2022-04-05 06:23:03,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220912001] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:03,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332242598] [2022-04-05 06:23:03,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:23:03,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:03,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:03,303 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:03,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-05 06:23:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:03,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-05 06:23:03,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:23:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:04,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:06,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332242598] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:06,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:06,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 159 [2022-04-05 06:23:06,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896789407] [2022-04-05 06:23:06,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:06,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-04-05 06:23:06,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:06,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-04-05 06:23:06,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4079, Invalid=21043, Unknown=0, NotChecked=0, Total=25122 [2022-04-05 06:23:06,898 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:08,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:23:08,741 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2022-04-05 06:23:08,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-05 06:23:08,741 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 121 [2022-04-05 06:23:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:23:08,748 INFO L225 Difference]: With dead ends: 149 [2022-04-05 06:23:08,748 INFO L226 Difference]: Without dead ends: 140 [2022-04-05 06:23:08,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21800 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6989, Invalid=39021, Unknown=0, NotChecked=0, Total=46010 [2022-04-05 06:23:08,751 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 210 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:23:08,751 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 80 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:23:08,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-05 06:23:08,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2022-04-05 06:23:08,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 124 states have (on average 1.0483870967741935) internal successors, (130), 126 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:23:08,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2022-04-05 06:23:08,767 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 121 [2022-04-05 06:23:08,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:23:08,767 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2022-04-05 06:23:08,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:08,768 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2022-04-05 06:23:08,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-05 06:23:08,768 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:23:08,768 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:23:08,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-04-05 06:23:08,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:08,975 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:08,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:08,975 INFO L85 PathProgramCache]: Analyzing trace with hash 793161216, now seen corresponding path program 44 times [2022-04-05 06:23:08,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:08,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107157619] [2022-04-05 06:23:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:08,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:09,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:09,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:09,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-05 06:23:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:09,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:09,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107157619] [2022-04-05 06:23:09,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107157619] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:09,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276213939] [2022-04-05 06:23:09,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:23:09,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:09,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:09,731 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:09,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-05 06:23:09,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:23:09,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:23:09,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-05 06:23:09,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:23:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:11,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:13,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276213939] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:13,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:13,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 55, 55] total 158 [2022-04-05 06:23:13,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724125050] [2022-04-05 06:23:13,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:13,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-04-05 06:23:13,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:13,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-04-05 06:23:13,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4121, Invalid=20685, Unknown=0, NotChecked=0, Total=24806 [2022-04-05 06:23:13,477 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:15,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:23:15,246 INFO L93 Difference]: Finished difference Result 151 states and 156 transitions. [2022-04-05 06:23:15,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-05 06:23:15,246 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 123 [2022-04-05 06:23:15,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:23:15,247 INFO L225 Difference]: With dead ends: 151 [2022-04-05 06:23:15,247 INFO L226 Difference]: Without dead ends: 139 [2022-04-05 06:23:15,250 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21535 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6999, Invalid=37733, Unknown=0, NotChecked=0, Total=44732 [2022-04-05 06:23:15,250 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:23:15,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 92 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:23:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-04-05 06:23:15,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2022-04-05 06:23:15,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 125 states have internal predecessors, (128), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:23:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2022-04-05 06:23:15,283 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 123 [2022-04-05 06:23:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:23:15,283 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2022-04-05 06:23:15,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:15,284 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2022-04-05 06:23:15,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-05 06:23:15,284 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:23:15,284 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:23:15,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-04-05 06:23:15,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-04-05 06:23:15,491 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:15,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1926404235, now seen corresponding path program 44 times [2022-04-05 06:23:15,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:15,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136889488] [2022-04-05 06:23:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:15,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:15,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:15,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:15,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-05 06:23:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:16,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:16,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136889488] [2022-04-05 06:23:16,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136889488] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:16,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908006328] [2022-04-05 06:23:16,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:23:16,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:16,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:16,417 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:16,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-05 06:23:16,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:23:16,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:23:16,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-05 06:23:16,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:23:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:18,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:19,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908006328] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:19,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:19,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 55, 55] total 158 [2022-04-05 06:23:19,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745887993] [2022-04-05 06:23:19,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:19,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-04-05 06:23:19,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:19,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-04-05 06:23:19,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4121, Invalid=20685, Unknown=0, NotChecked=0, Total=24806 [2022-04-05 06:23:20,000 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:21,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:23:21,656 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2022-04-05 06:23:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-05 06:23:21,656 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 123 [2022-04-05 06:23:21,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:23:21,657 INFO L225 Difference]: With dead ends: 145 [2022-04-05 06:23:21,657 INFO L226 Difference]: Without dead ends: 135 [2022-04-05 06:23:21,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21392 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6999, Invalid=37733, Unknown=0, NotChecked=0, Total=44732 [2022-04-05 06:23:21,661 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 254 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:23:21,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 70 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:23:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-05 06:23:21,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-04-05 06:23:21,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 124 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:23:21,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2022-04-05 06:23:21,686 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 123 [2022-04-05 06:23:21,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:23:21,686 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2022-04-05 06:23:21,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:21,686 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2022-04-05 06:23:21,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-05 06:23:21,686 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:23:21,687 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:23:21,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-04-05 06:23:21,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:21,887 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:21,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:21,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1900337563, now seen corresponding path program 45 times [2022-04-05 06:23:21,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:21,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405031713] [2022-04-05 06:23:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:21,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:21,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:21,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:22,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-05 06:23:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:22,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:22,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405031713] [2022-04-05 06:23:22,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405031713] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:22,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116520959] [2022-04-05 06:23:22,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:23:22,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:22,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:22,695 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:22,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-05 06:23:22,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-04-05 06:23:22,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:23:22,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-05 06:23:22,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:23:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:24,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:26,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116520959] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:26,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:26,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 165 [2022-04-05 06:23:26,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843756575] [2022-04-05 06:23:26,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:26,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-04-05 06:23:26,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:26,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-04-05 06:23:26,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4397, Invalid=22663, Unknown=0, NotChecked=0, Total=27060 [2022-04-05 06:23:26,880 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:23:29,028 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2022-04-05 06:23:29,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-05 06:23:29,028 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 125 [2022-04-05 06:23:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:23:29,029 INFO L225 Difference]: With dead ends: 158 [2022-04-05 06:23:29,029 INFO L226 Difference]: Without dead ends: 147 [2022-04-05 06:23:29,032 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23519 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7525, Invalid=41981, Unknown=0, NotChecked=0, Total=49506 [2022-04-05 06:23:29,032 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:23:29,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 127 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:23:29,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-04-05 06:23:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2022-04-05 06:23:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 125 states have (on average 1.04) internal successors, (130), 127 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:23:29,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2022-04-05 06:23:29,049 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 125 [2022-04-05 06:23:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:23:29,049 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2022-04-05 06:23:29,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2022-04-05 06:23:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-05 06:23:29,049 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:23:29,050 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:23:29,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-04-05 06:23:29,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:29,254 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:29,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:29,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1194324665, now seen corresponding path program 45 times [2022-04-05 06:23:29,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:29,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598496509] [2022-04-05 06:23:29,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:29,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:29,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:29,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:29,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-05 06:23:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:30,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:30,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598496509] [2022-04-05 06:23:30,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598496509] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:30,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723672375] [2022-04-05 06:23:30,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:23:30,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:30,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:30,248 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:30,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-05 06:23:30,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-04-05 06:23:30,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:23:30,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-05 06:23:30,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:23:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:32,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:34,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723672375] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:34,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:34,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 165 [2022-04-05 06:23:34,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328239323] [2022-04-05 06:23:34,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:34,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-04-05 06:23:34,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:34,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-04-05 06:23:34,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4397, Invalid=22663, Unknown=0, NotChecked=0, Total=27060 [2022-04-05 06:23:34,136 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:23:36,052 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-04-05 06:23:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-05 06:23:36,053 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 125 [2022-04-05 06:23:36,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:23:36,053 INFO L225 Difference]: With dead ends: 153 [2022-04-05 06:23:36,053 INFO L226 Difference]: Without dead ends: 144 [2022-04-05 06:23:36,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23544 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7525, Invalid=41981, Unknown=0, NotChecked=0, Total=49506 [2022-04-05 06:23:36,057 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 259 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:23:36,057 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 75 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:23:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-05 06:23:36,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-04-05 06:23:36,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 128 states have (on average 1.046875) internal successors, (134), 130 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:23:36,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 145 transitions. [2022-04-05 06:23:36,088 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 145 transitions. Word has length 125 [2022-04-05 06:23:36,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:23:36,088 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 145 transitions. [2022-04-05 06:23:36,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 145 transitions. [2022-04-05 06:23:36,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-05 06:23:36,089 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:23:36,089 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:23:36,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-04-05 06:23:36,289 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:36,290 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:36,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:36,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1250826337, now seen corresponding path program 46 times [2022-04-05 06:23:36,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:36,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680725995] [2022-04-05 06:23:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:36,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:36,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:36,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:36,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-05 06:23:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:37,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:37,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680725995] [2022-04-05 06:23:37,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680725995] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:37,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474328046] [2022-04-05 06:23:37,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:23:37,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:37,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:37,079 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:37,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-05 06:23:37,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:23:37,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:23:37,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-05 06:23:37,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:23:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:38,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:40,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474328046] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:40,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:40,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 57, 57] total 164 [2022-04-05 06:23:40,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783312800] [2022-04-05 06:23:40,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:40,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-04-05 06:23:40,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:40,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-04-05 06:23:40,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4441, Invalid=22291, Unknown=0, NotChecked=0, Total=26732 [2022-04-05 06:23:40,954 INFO L87 Difference]: Start difference. First operand 140 states and 145 transitions. Second operand has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:23:42,855 INFO L93 Difference]: Finished difference Result 155 states and 160 transitions. [2022-04-05 06:23:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-05 06:23:42,856 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 127 [2022-04-05 06:23:42,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:23:42,856 INFO L225 Difference]: With dead ends: 155 [2022-04-05 06:23:42,856 INFO L226 Difference]: Without dead ends: 143 [2022-04-05 06:23:42,859 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23268 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7537, Invalid=40643, Unknown=0, NotChecked=0, Total=48180 [2022-04-05 06:23:42,859 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 166 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:23:42,859 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 117 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:23:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-05 06:23:42,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2022-04-05 06:23:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 129 states have internal predecessors, (132), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:23:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 143 transitions. [2022-04-05 06:23:42,876 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 143 transitions. Word has length 127 [2022-04-05 06:23:42,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:23:42,876 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 143 transitions. [2022-04-05 06:23:42,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:42,877 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 143 transitions. [2022-04-05 06:23:42,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-05 06:23:42,877 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:23:42,877 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:23:42,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-04-05 06:23:43,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:43,097 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:43,097 INFO L85 PathProgramCache]: Analyzing trace with hash 871355412, now seen corresponding path program 46 times [2022-04-05 06:23:43,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:43,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031102811] [2022-04-05 06:23:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:43,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:43,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:43,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:43,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-05 06:23:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:44,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:44,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031102811] [2022-04-05 06:23:44,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031102811] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:44,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379318824] [2022-04-05 06:23:44,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:23:44,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:44,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:44,134 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:44,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-05 06:23:44,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:23:44,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:23:44,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-05 06:23:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:23:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:45,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:47,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379318824] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:47,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:47,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 57, 57] total 164 [2022-04-05 06:23:47,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108555002] [2022-04-05 06:23:47,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:47,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-04-05 06:23:47,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:47,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-04-05 06:23:47,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4441, Invalid=22291, Unknown=0, NotChecked=0, Total=26732 [2022-04-05 06:23:47,878 INFO L87 Difference]: Start difference. First operand 139 states and 143 transitions. Second operand has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:23:49,836 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-04-05 06:23:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-05 06:23:49,836 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 127 [2022-04-05 06:23:49,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:23:49,837 INFO L225 Difference]: With dead ends: 149 [2022-04-05 06:23:49,837 INFO L226 Difference]: Without dead ends: 139 [2022-04-05 06:23:49,840 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23119 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7537, Invalid=40643, Unknown=0, NotChecked=0, Total=48180 [2022-04-05 06:23:49,840 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 173 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:23:49,840 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 110 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:23:49,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-04-05 06:23:49,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-04-05 06:23:49,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 128 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:23:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2022-04-05 06:23:49,857 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 127 [2022-04-05 06:23:49,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:23:49,857 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2022-04-05 06:23:49,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2022-04-05 06:23:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-05 06:23:49,858 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:23:49,858 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:23:49,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-04-05 06:23:50,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-04-05 06:23:50,059 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:50,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1897831034, now seen corresponding path program 47 times [2022-04-05 06:23:50,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:50,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609533428] [2022-04-05 06:23:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:50,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:50,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:50,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:50,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-05 06:23:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:50,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:50,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609533428] [2022-04-05 06:23:50,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609533428] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:50,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546263890] [2022-04-05 06:23:50,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:23:50,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:50,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:50,914 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:50,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-05 06:23:51,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-04-05 06:23:51,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:23:51,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-05 06:23:51,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:23:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:52,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:23:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:55,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546263890] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:23:55,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:23:55,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 171 [2022-04-05 06:23:55,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431935186] [2022-04-05 06:23:55,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:23:55,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-04-05 06:23:55,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:23:55,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-04-05 06:23:55,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4727, Invalid=24343, Unknown=0, NotChecked=0, Total=29070 [2022-04-05 06:23:55,200 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:23:57,392 INFO L93 Difference]: Finished difference Result 162 states and 169 transitions. [2022-04-05 06:23:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-05 06:23:57,393 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 129 [2022-04-05 06:23:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:23:57,393 INFO L225 Difference]: With dead ends: 162 [2022-04-05 06:23:57,393 INFO L226 Difference]: Without dead ends: 151 [2022-04-05 06:23:57,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25329 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8081, Invalid=45049, Unknown=0, NotChecked=0, Total=53130 [2022-04-05 06:23:57,396 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 227 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:23:57,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 112 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:23:57,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-04-05 06:23:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2022-04-05 06:23:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 129 states have (on average 1.0387596899224807) internal successors, (134), 131 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:23:57,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2022-04-05 06:23:57,414 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 129 [2022-04-05 06:23:57,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:23:57,414 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2022-04-05 06:23:57,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:23:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2022-04-05 06:23:57,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-05 06:23:57,415 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:23:57,415 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:23:57,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-04-05 06:23:57,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-04-05 06:23:57,615 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:23:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:23:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2034771928, now seen corresponding path program 47 times [2022-04-05 06:23:57,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:23:57,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286950253] [2022-04-05 06:23:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:23:57,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:23:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:57,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:23:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:57,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:23:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:58,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-05 06:23:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:23:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:23:58,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:23:58,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286950253] [2022-04-05 06:23:58,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286950253] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:23:58,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901802851] [2022-04-05 06:23:58,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:23:58,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:23:58,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:23:58,669 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:23:58,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-05 06:23:58,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-04-05 06:23:58,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:23:58,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-05 06:23:58,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:00,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:02,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901802851] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:02,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:02,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 171 [2022-04-05 06:24:02,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17945881] [2022-04-05 06:24:02,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:02,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-04-05 06:24:02,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:02,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-04-05 06:24:02,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4727, Invalid=24343, Unknown=0, NotChecked=0, Total=29070 [2022-04-05 06:24:02,676 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:04,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:04,965 INFO L93 Difference]: Finished difference Result 157 states and 162 transitions. [2022-04-05 06:24:04,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-05 06:24:04,966 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 129 [2022-04-05 06:24:04,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:04,966 INFO L225 Difference]: With dead ends: 157 [2022-04-05 06:24:04,966 INFO L226 Difference]: Without dead ends: 148 [2022-04-05 06:24:04,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25355 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8081, Invalid=45049, Unknown=0, NotChecked=0, Total=53130 [2022-04-05 06:24:04,969 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 201 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:04,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 155 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:24:04,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-04-05 06:24:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2022-04-05 06:24:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 132 states have (on average 1.0454545454545454) internal successors, (138), 134 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:24:04,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2022-04-05 06:24:04,987 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 129 [2022-04-05 06:24:04,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:04,987 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2022-04-05 06:24:04,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:04,988 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2022-04-05 06:24:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-05 06:24:04,988 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:04,988 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:05,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-04-05 06:24:05,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-04-05 06:24:05,189 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:05,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1034858242, now seen corresponding path program 48 times [2022-04-05 06:24:05,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:05,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25390792] [2022-04-05 06:24:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:05,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:05,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:05,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:05,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-05 06:24:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:06,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:24:06,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25390792] [2022-04-05 06:24:06,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25390792] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:24:06,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016474460] [2022-04-05 06:24:06,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:24:06,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:06,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:24:06,059 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:24:06,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-05 06:24:06,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-04-05 06:24:06,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:24:06,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-05 06:24:06,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:07,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:10,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016474460] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:10,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:10,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 59, 59] total 170 [2022-04-05 06:24:10,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368497980] [2022-04-05 06:24:10,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:10,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-04-05 06:24:10,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:10,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-04-05 06:24:10,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4773, Invalid=23957, Unknown=0, NotChecked=0, Total=28730 [2022-04-05 06:24:10,217 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:12,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:12,195 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2022-04-05 06:24:12,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-05 06:24:12,196 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 131 [2022-04-05 06:24:12,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:12,196 INFO L225 Difference]: With dead ends: 159 [2022-04-05 06:24:12,197 INFO L226 Difference]: Without dead ends: 147 [2022-04-05 06:24:12,199 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25068 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8095, Invalid=43661, Unknown=0, NotChecked=0, Total=51756 [2022-04-05 06:24:12,199 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 204 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:12,199 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 97 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:24:12,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-04-05 06:24:12,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2022-04-05 06:24:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 133 states have internal predecessors, (136), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:24:12,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2022-04-05 06:24:12,217 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 131 [2022-04-05 06:24:12,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:12,218 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2022-04-05 06:24:12,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:12,218 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2022-04-05 06:24:12,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-05 06:24:12,218 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:12,218 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:12,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-04-05 06:24:12,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:12,432 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:12,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:12,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1738166157, now seen corresponding path program 48 times [2022-04-05 06:24:12,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:12,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534907006] [2022-04-05 06:24:12,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:12,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:12,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:12,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:12,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-05 06:24:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:13,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:24:13,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534907006] [2022-04-05 06:24:13,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534907006] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:24:13,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226183469] [2022-04-05 06:24:13,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:24:13,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:13,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:24:13,452 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:24:13,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-05 06:24:13,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-04-05 06:24:13,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:24:13,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-05 06:24:13,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:15,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:17,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226183469] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:17,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:17,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 59, 59] total 170 [2022-04-05 06:24:17,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326037174] [2022-04-05 06:24:17,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:17,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-04-05 06:24:17,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:17,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-04-05 06:24:17,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4773, Invalid=23957, Unknown=0, NotChecked=0, Total=28730 [2022-04-05 06:24:17,407 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:19,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:19,324 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2022-04-05 06:24:19,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-05 06:24:19,324 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 131 [2022-04-05 06:24:19,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:19,325 INFO L225 Difference]: With dead ends: 153 [2022-04-05 06:24:19,325 INFO L226 Difference]: Without dead ends: 143 [2022-04-05 06:24:19,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24913 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=8095, Invalid=43661, Unknown=0, NotChecked=0, Total=51756 [2022-04-05 06:24:19,328 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 174 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:19,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 105 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:24:19,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-05 06:24:19,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-04-05 06:24:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 132 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:24:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2022-04-05 06:24:19,347 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 131 [2022-04-05 06:24:19,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:19,347 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2022-04-05 06:24:19,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:19,347 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2022-04-05 06:24:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-05 06:24:19,347 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:19,347 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:19,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-04-05 06:24:19,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-05 06:24:19,548 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:19,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1886463207, now seen corresponding path program 49 times [2022-04-05 06:24:19,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:19,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389319047] [2022-04-05 06:24:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:19,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:19,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:19,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:19,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-05 06:24:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:20,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:24:20,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389319047] [2022-04-05 06:24:20,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389319047] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:24:20,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285229228] [2022-04-05 06:24:20,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:24:20,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:20,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:24:20,416 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:24:20,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-05 06:24:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:20,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-05 06:24:20,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:22,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:24,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285229228] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:24,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:24,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 177 [2022-04-05 06:24:24,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329262278] [2022-04-05 06:24:24,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:24,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-04-05 06:24:24,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:24,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-04-05 06:24:24,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5069, Invalid=26083, Unknown=0, NotChecked=0, Total=31152 [2022-04-05 06:24:24,869 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:27,207 INFO L93 Difference]: Finished difference Result 166 states and 173 transitions. [2022-04-05 06:24:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-05 06:24:27,208 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 133 [2022-04-05 06:24:27,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:27,208 INFO L225 Difference]: With dead ends: 166 [2022-04-05 06:24:27,208 INFO L226 Difference]: Without dead ends: 155 [2022-04-05 06:24:27,212 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27206 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8657, Invalid=48225, Unknown=0, NotChecked=0, Total=56882 [2022-04-05 06:24:27,212 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 213 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:27,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 137 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:24:27,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-05 06:24:27,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2022-04-05 06:24:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 133 states have (on average 1.037593984962406) internal successors, (138), 135 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:24:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2022-04-05 06:24:27,252 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 133 [2022-04-05 06:24:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:27,252 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2022-04-05 06:24:27,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2022-04-05 06:24:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-05 06:24:27,253 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:27,253 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:27,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-04-05 06:24:27,470 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-05 06:24:27,471 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:27,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:27,471 INFO L85 PathProgramCache]: Analyzing trace with hash 875220151, now seen corresponding path program 49 times [2022-04-05 06:24:27,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:27,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850775719] [2022-04-05 06:24:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:27,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:27,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:27,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:27,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-05 06:24:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:28,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:24:28,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850775719] [2022-04-05 06:24:28,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850775719] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:24:28,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42582424] [2022-04-05 06:24:28,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:24:28,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:28,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:24:28,550 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:24:28,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-05 06:24:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:28,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-05 06:24:28,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:30,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:32,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42582424] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:32,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:32,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 177 [2022-04-05 06:24:32,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117761530] [2022-04-05 06:24:32,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:32,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-04-05 06:24:32,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:32,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-04-05 06:24:32,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5069, Invalid=26083, Unknown=0, NotChecked=0, Total=31152 [2022-04-05 06:24:32,748 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:34,880 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2022-04-05 06:24:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-05 06:24:34,881 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 133 [2022-04-05 06:24:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:34,882 INFO L225 Difference]: With dead ends: 161 [2022-04-05 06:24:34,882 INFO L226 Difference]: Without dead ends: 152 [2022-04-05 06:24:34,885 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27233 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8657, Invalid=48225, Unknown=0, NotChecked=0, Total=56882 [2022-04-05 06:24:34,885 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 198 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:34,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 90 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:24:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-05 06:24:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2022-04-05 06:24:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 136 states have (on average 1.0441176470588236) internal successors, (142), 138 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:24:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2022-04-05 06:24:34,917 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 133 [2022-04-05 06:24:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:34,918 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2022-04-05 06:24:34,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2022-04-05 06:24:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-05 06:24:34,918 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:34,918 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:34,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-04-05 06:24:35,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:35,119 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:35,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:35,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1327381021, now seen corresponding path program 50 times [2022-04-05 06:24:35,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:35,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31763792] [2022-04-05 06:24:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:35,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:35,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:35,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:35,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-05 06:24:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:35,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:24:35,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31763792] [2022-04-05 06:24:35,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31763792] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:24:35,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682403049] [2022-04-05 06:24:35,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:24:35,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:35,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:24:35,995 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:24:35,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-05 06:24:36,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:24:36,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:24:36,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-05 06:24:36,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:37,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:40,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682403049] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:40,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:40,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 61, 61] total 176 [2022-04-05 06:24:40,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052232137] [2022-04-05 06:24:40,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:40,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-04-05 06:24:40,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:40,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-04-05 06:24:40,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5117, Invalid=25683, Unknown=0, NotChecked=0, Total=30800 [2022-04-05 06:24:40,326 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:42,554 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2022-04-05 06:24:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-05 06:24:42,555 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 135 [2022-04-05 06:24:42,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:42,555 INFO L225 Difference]: With dead ends: 163 [2022-04-05 06:24:42,555 INFO L226 Difference]: Without dead ends: 151 [2022-04-05 06:24:42,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26935 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8673, Invalid=46787, Unknown=0, NotChecked=0, Total=55460 [2022-04-05 06:24:42,560 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 195 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:42,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 127 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:24:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-04-05 06:24:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2022-04-05 06:24:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 135 states have (on average 1.037037037037037) internal successors, (140), 137 states have internal predecessors, (140), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:24:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2022-04-05 06:24:42,592 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 135 [2022-04-05 06:24:42,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:42,592 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2022-04-05 06:24:42,592 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2022-04-05 06:24:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-05 06:24:42,593 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:42,593 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:42,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-04-05 06:24:42,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:42,793 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:42,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:42,793 INFO L85 PathProgramCache]: Analyzing trace with hash -252162926, now seen corresponding path program 50 times [2022-04-05 06:24:42,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:42,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074549411] [2022-04-05 06:24:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:42,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:42,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:42,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:43,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-05 06:24:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:43,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:24:43,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074549411] [2022-04-05 06:24:43,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074549411] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:24:43,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123098709] [2022-04-05 06:24:43,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:24:43,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:43,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:24:43,894 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:24:43,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-05 06:24:44,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:24:44,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:24:44,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-05 06:24:44,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:45,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:48,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123098709] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:48,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:48,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 61, 61] total 176 [2022-04-05 06:24:48,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483428721] [2022-04-05 06:24:48,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:48,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-04-05 06:24:48,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:48,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-04-05 06:24:48,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5117, Invalid=25683, Unknown=0, NotChecked=0, Total=30800 [2022-04-05 06:24:48,016 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:50,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:50,189 INFO L93 Difference]: Finished difference Result 157 states and 160 transitions. [2022-04-05 06:24:50,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-05 06:24:50,189 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 135 [2022-04-05 06:24:50,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:50,190 INFO L225 Difference]: With dead ends: 157 [2022-04-05 06:24:50,190 INFO L226 Difference]: Without dead ends: 147 [2022-04-05 06:24:50,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26774 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8673, Invalid=46787, Unknown=0, NotChecked=0, Total=55460 [2022-04-05 06:24:50,194 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 200 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:50,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 125 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:24:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-04-05 06:24:50,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-04-05 06:24:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 136 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:24:50,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2022-04-05 06:24:50,234 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 135 [2022-04-05 06:24:50,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:50,234 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2022-04-05 06:24:50,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2022-04-05 06:24:50,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-05 06:24:50,235 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:50,235 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:50,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-04-05 06:24:50,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-04-05 06:24:50,435 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:50,436 INFO L85 PathProgramCache]: Analyzing trace with hash 233499512, now seen corresponding path program 51 times [2022-04-05 06:24:50,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:50,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925547422] [2022-04-05 06:24:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:50,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:50,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:50,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:50,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-05 06:24:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:51,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:24:51,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925547422] [2022-04-05 06:24:51,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925547422] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:24:51,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739387606] [2022-04-05 06:24:51,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:24:51,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:51,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:24:51,377 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:24:51,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-05 06:24:51,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-04-05 06:24:51,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:24:51,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-05 06:24:51,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:24:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:53,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:24:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:24:56,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739387606] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:24:56,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:24:56,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 183 [2022-04-05 06:24:56,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755243359] [2022-04-05 06:24:56,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:24:56,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-04-05 06:24:56,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:24:56,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-04-05 06:24:56,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5423, Invalid=27883, Unknown=0, NotChecked=0, Total=33306 [2022-04-05 06:24:56,130 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:58,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:24:58,622 INFO L93 Difference]: Finished difference Result 170 states and 177 transitions. [2022-04-05 06:24:58,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-05 06:24:58,622 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 137 [2022-04-05 06:24:58,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:24:58,622 INFO L225 Difference]: With dead ends: 170 [2022-04-05 06:24:58,622 INFO L226 Difference]: Without dead ends: 159 [2022-04-05 06:24:58,626 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29150 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9253, Invalid=51509, Unknown=0, NotChecked=0, Total=60762 [2022-04-05 06:24:58,626 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 234 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:24:58,626 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 142 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1901 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:24:58,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-05 06:24:58,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 149. [2022-04-05 06:24:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 139 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:24:58,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2022-04-05 06:24:58,646 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 137 [2022-04-05 06:24:58,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:24:58,646 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2022-04-05 06:24:58,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:24:58,647 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2022-04-05 06:24:58,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-05 06:24:58,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:24:58,647 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:24:58,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-04-05 06:24:58,866 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:24:58,866 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:24:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:24:58,867 INFO L85 PathProgramCache]: Analyzing trace with hash -68079274, now seen corresponding path program 51 times [2022-04-05 06:24:58,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:24:58,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045494847] [2022-04-05 06:24:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:24:58,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:24:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:58,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:24:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:58,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:24:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:24:59,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-05 06:24:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:00,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:25:00,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045494847] [2022-04-05 06:25:00,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045494847] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:25:00,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033755591] [2022-04-05 06:25:00,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:25:00,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:00,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:25:00,032 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:25:00,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-05 06:25:00,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-04-05 06:25:00,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:25:00,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-05 06:25:00,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:25:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:02,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:25:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:04,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033755591] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:25:04,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:25:04,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 183 [2022-04-05 06:25:04,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287892515] [2022-04-05 06:25:04,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:25:04,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-04-05 06:25:04,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:25:04,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-04-05 06:25:04,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5423, Invalid=27883, Unknown=0, NotChecked=0, Total=33306 [2022-04-05 06:25:04,633 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:07,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:25:07,038 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2022-04-05 06:25:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-05 06:25:07,038 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 137 [2022-04-05 06:25:07,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:25:07,038 INFO L225 Difference]: With dead ends: 165 [2022-04-05 06:25:07,038 INFO L226 Difference]: Without dead ends: 156 [2022-04-05 06:25:07,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29178 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9253, Invalid=51509, Unknown=0, NotChecked=0, Total=60762 [2022-04-05 06:25:07,042 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 262 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:25:07,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 110 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:25:07,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-04-05 06:25:07,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2022-04-05 06:25:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 140 states have (on average 1.042857142857143) internal successors, (146), 142 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:25:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 157 transitions. [2022-04-05 06:25:07,063 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 157 transitions. Word has length 137 [2022-04-05 06:25:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:25:07,063 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 157 transitions. [2022-04-05 06:25:07,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 157 transitions. [2022-04-05 06:25:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-05 06:25:07,063 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:25:07,064 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:25:07,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-04-05 06:25:07,272 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:07,273 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:25:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:25:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1054733052, now seen corresponding path program 52 times [2022-04-05 06:25:07,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:25:07,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744558005] [2022-04-05 06:25:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:25:07,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:25:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:07,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:25:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:07,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:25:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:07,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-05 06:25:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:08,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:25:08,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744558005] [2022-04-05 06:25:08,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744558005] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:25:08,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348753405] [2022-04-05 06:25:08,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:25:08,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:08,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:25:08,243 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:25:08,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-05 06:25:08,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:25:08,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:25:08,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-05 06:25:08,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:25:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:10,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:25:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:12,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348753405] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:25:12,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:25:12,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 63, 63] total 182 [2022-04-05 06:25:12,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954760538] [2022-04-05 06:25:12,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:25:12,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-04-05 06:25:12,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:25:12,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-04-05 06:25:12,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5473, Invalid=27469, Unknown=0, NotChecked=0, Total=32942 [2022-04-05 06:25:12,976 INFO L87 Difference]: Start difference. First operand 152 states and 157 transitions. Second operand has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:15,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:25:15,216 INFO L93 Difference]: Finished difference Result 167 states and 172 transitions. [2022-04-05 06:25:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-05 06:25:15,216 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 139 [2022-04-05 06:25:15,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:25:15,217 INFO L225 Difference]: With dead ends: 167 [2022-04-05 06:25:15,217 INFO L226 Difference]: Without dead ends: 155 [2022-04-05 06:25:15,219 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 161 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28869 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=9271, Invalid=50021, Unknown=0, NotChecked=0, Total=59292 [2022-04-05 06:25:15,220 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 179 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:25:15,220 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 127 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:25:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-05 06:25:15,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2022-04-05 06:25:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 141 states have internal predecessors, (144), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:25:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2022-04-05 06:25:15,240 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 139 [2022-04-05 06:25:15,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:25:15,241 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2022-04-05 06:25:15,241 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2022-04-05 06:25:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-05 06:25:15,241 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:25:15,241 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:25:15,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-04-05 06:25:15,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-04-05 06:25:15,442 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:25:15,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:25:15,442 INFO L85 PathProgramCache]: Analyzing trace with hash -774047631, now seen corresponding path program 52 times [2022-04-05 06:25:15,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:25:15,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468959189] [2022-04-05 06:25:15,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:25:15,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:25:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:15,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:25:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:15,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:25:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:15,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-05 06:25:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:16,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:25:16,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468959189] [2022-04-05 06:25:16,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468959189] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:25:16,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337244328] [2022-04-05 06:25:16,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:25:16,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:16,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:25:16,603 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:25:16,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-05 06:25:16,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:25:16,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:25:16,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-05 06:25:16,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:25:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:18,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:25:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:21,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337244328] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:25:21,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:25:21,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 63, 63] total 182 [2022-04-05 06:25:21,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063007796] [2022-04-05 06:25:21,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:25:21,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-04-05 06:25:21,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:25:21,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-04-05 06:25:21,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5473, Invalid=27469, Unknown=0, NotChecked=0, Total=32942 [2022-04-05 06:25:21,012 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:23,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:25:23,353 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2022-04-05 06:25:23,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-05 06:25:23,354 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 139 [2022-04-05 06:25:23,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:25:23,354 INFO L225 Difference]: With dead ends: 161 [2022-04-05 06:25:23,354 INFO L226 Difference]: Without dead ends: 151 [2022-04-05 06:25:23,357 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 161 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28702 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=9271, Invalid=50021, Unknown=0, NotChecked=0, Total=59292 [2022-04-05 06:25:23,357 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 217 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:25:23,357 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 135 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:25:23,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-04-05 06:25:23,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-04-05 06:25:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 140 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:25:23,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2022-04-05 06:25:23,378 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 139 [2022-04-05 06:25:23,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:25:23,378 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2022-04-05 06:25:23,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:23,378 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2022-04-05 06:25:23,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-05 06:25:23,379 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:25:23,379 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:25:23,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-04-05 06:25:23,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:23,579 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:25:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:25:23,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1213471639, now seen corresponding path program 53 times [2022-04-05 06:25:23,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:25:23,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284408665] [2022-04-05 06:25:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:25:23,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:25:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:23,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:25:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:23,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:25:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:24,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-05 06:25:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:24,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:25:24,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284408665] [2022-04-05 06:25:24,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284408665] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:25:24,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30428985] [2022-04-05 06:25:24,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:25:24,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:24,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:25:24,548 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:25:24,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-05 06:25:24,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2022-04-05 06:25:24,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:25:24,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-05 06:25:24,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:25:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:26,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:25:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:29,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30428985] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:25:29,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:25:29,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 189 [2022-04-05 06:25:29,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246343963] [2022-04-05 06:25:29,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:25:29,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-04-05 06:25:29,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:25:29,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-04-05 06:25:29,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5789, Invalid=29743, Unknown=0, NotChecked=0, Total=35532 [2022-04-05 06:25:29,532 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:32,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:25:32,174 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2022-04-05 06:25:32,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-05 06:25:32,175 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 141 [2022-04-05 06:25:32,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:25:32,175 INFO L225 Difference]: With dead ends: 174 [2022-04-05 06:25:32,175 INFO L226 Difference]: Without dead ends: 163 [2022-04-05 06:25:32,178 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31161 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9869, Invalid=54901, Unknown=0, NotChecked=0, Total=64770 [2022-04-05 06:25:32,178 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 233 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:25:32,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 122 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:25:32,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-05 06:25:32,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 153. [2022-04-05 06:25:32,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.0354609929078014) internal successors, (146), 143 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:25:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2022-04-05 06:25:32,199 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 141 [2022-04-05 06:25:32,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:25:32,199 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2022-04-05 06:25:32,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2022-04-05 06:25:32,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-05 06:25:32,200 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:25:32,200 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:25:32,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-04-05 06:25:32,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-04-05 06:25:32,415 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:25:32,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:25:32,416 INFO L85 PathProgramCache]: Analyzing trace with hash -830429771, now seen corresponding path program 53 times [2022-04-05 06:25:32,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:25:32,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653133579] [2022-04-05 06:25:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:25:32,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:25:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:32,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:25:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:32,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:25:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:32,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-05 06:25:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:33,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:25:33,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653133579] [2022-04-05 06:25:33,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653133579] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:25:33,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694744073] [2022-04-05 06:25:33,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:25:33,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:33,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:25:33,649 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:25:33,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-05 06:25:34,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2022-04-05 06:25:34,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:25:34,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-05 06:25:34,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:25:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:35,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:25:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:38,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694744073] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:25:38,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:25:38,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 189 [2022-04-05 06:25:38,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568770570] [2022-04-05 06:25:38,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:25:38,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-04-05 06:25:38,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:25:38,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-04-05 06:25:38,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5789, Invalid=29743, Unknown=0, NotChecked=0, Total=35532 [2022-04-05 06:25:38,371 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:25:40,848 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2022-04-05 06:25:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-05 06:25:40,848 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 141 [2022-04-05 06:25:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:25:40,848 INFO L225 Difference]: With dead ends: 169 [2022-04-05 06:25:40,848 INFO L226 Difference]: Without dead ends: 160 [2022-04-05 06:25:40,851 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31190 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9869, Invalid=54901, Unknown=0, NotChecked=0, Total=64770 [2022-04-05 06:25:40,851 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 221 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:25:40,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 105 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:25:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-05 06:25:40,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2022-04-05 06:25:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 144 states have (on average 1.0416666666666667) internal successors, (150), 146 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:25:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2022-04-05 06:25:40,873 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 141 [2022-04-05 06:25:40,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:25:40,873 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2022-04-05 06:25:40,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:40,873 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2022-04-05 06:25:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-05 06:25:40,873 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:25:40,874 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:25:40,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-04-05 06:25:41,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:41,074 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:25:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:25:41,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1419654245, now seen corresponding path program 54 times [2022-04-05 06:25:41,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:25:41,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442283687] [2022-04-05 06:25:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:25:41,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:25:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:41,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:25:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:41,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:25:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:41,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-05 06:25:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:42,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:25:42,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442283687] [2022-04-05 06:25:42,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442283687] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:25:42,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754807600] [2022-04-05 06:25:42,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:25:42,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:42,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:25:42,079 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:25:42,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-04-05 06:25:42,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-04-05 06:25:42,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:25:42,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-05 06:25:42,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:25:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:44,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:25:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:46,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754807600] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:25:46,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:25:46,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 65, 65] total 188 [2022-04-05 06:25:46,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154778677] [2022-04-05 06:25:46,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:25:46,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-04-05 06:25:46,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:25:46,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-04-05 06:25:46,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5841, Invalid=29315, Unknown=0, NotChecked=0, Total=35156 [2022-04-05 06:25:46,984 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:25:49,206 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2022-04-05 06:25:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-05 06:25:49,207 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 143 [2022-04-05 06:25:49,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:25:49,207 INFO L225 Difference]: With dead ends: 171 [2022-04-05 06:25:49,208 INFO L226 Difference]: Without dead ends: 159 [2022-04-05 06:25:49,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30870 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9889, Invalid=53363, Unknown=0, NotChecked=0, Total=63252 [2022-04-05 06:25:49,212 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 204 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:25:49,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 92 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:25:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-05 06:25:49,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2022-04-05 06:25:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 143 states have (on average 1.034965034965035) internal successors, (148), 145 states have internal predecessors, (148), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:25:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2022-04-05 06:25:49,234 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 143 [2022-04-05 06:25:49,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:25:49,234 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2022-04-05 06:25:49,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:49,234 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2022-04-05 06:25:49,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-05 06:25:49,234 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:25:49,234 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:25:49,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-04-05 06:25:49,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-04-05 06:25:49,447 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:25:49,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:25:49,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2048197648, now seen corresponding path program 54 times [2022-04-05 06:25:49,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:25:49,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482988561] [2022-04-05 06:25:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:25:49,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:25:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:49,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:25:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:49,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:25:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:49,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-05 06:25:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:50,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:25:50,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482988561] [2022-04-05 06:25:50,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482988561] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:25:50,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751532224] [2022-04-05 06:25:50,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:25:50,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:50,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:25:50,670 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:25:50,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-04-05 06:25:51,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-04-05 06:25:51,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:25:51,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-05 06:25:51,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:25:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:52,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:25:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:55,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751532224] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:25:55,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:25:55,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 65, 65] total 188 [2022-04-05 06:25:55,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120627340] [2022-04-05 06:25:55,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:25:55,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-04-05 06:25:55,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:25:55,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-04-05 06:25:55,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5841, Invalid=29315, Unknown=0, NotChecked=0, Total=35156 [2022-04-05 06:25:55,254 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:57,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:25:57,546 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2022-04-05 06:25:57,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-05 06:25:57,546 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 143 [2022-04-05 06:25:57,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:25:57,547 INFO L225 Difference]: With dead ends: 165 [2022-04-05 06:25:57,547 INFO L226 Difference]: Without dead ends: 155 [2022-04-05 06:25:57,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30697 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9889, Invalid=53363, Unknown=0, NotChecked=0, Total=63252 [2022-04-05 06:25:57,549 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:25:57,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 120 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:25:57,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-05 06:25:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-04-05 06:25:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 142 states have (on average 1.028169014084507) internal successors, (146), 144 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:25:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2022-04-05 06:25:57,571 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 143 [2022-04-05 06:25:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:25:57,571 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2022-04-05 06:25:57,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:25:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2022-04-05 06:25:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-05 06:25:57,571 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:25:57,571 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:25:57,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-04-05 06:25:57,772 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-04-05 06:25:57,772 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:25:57,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:25:57,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1028146314, now seen corresponding path program 55 times [2022-04-05 06:25:57,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:25:57,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815036649] [2022-04-05 06:25:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:25:57,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:25:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:57,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:25:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:57,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:25:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:58,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-05 06:25:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:25:58,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:25:58,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815036649] [2022-04-05 06:25:58,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815036649] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:25:58,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563900288] [2022-04-05 06:25:58,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:25:58,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:25:58,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:25:58,791 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:25:58,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-04-05 06:25:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:25:59,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-05 06:25:59,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:26:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:01,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:26:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:04,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563900288] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:26:04,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:26:04,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 195 [2022-04-05 06:26:04,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382941138] [2022-04-05 06:26:04,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:26:04,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-04-05 06:26:04,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:26:04,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-04-05 06:26:04,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6167, Invalid=31663, Unknown=0, NotChecked=0, Total=37830 [2022-04-05 06:26:04,100 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:26:06,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:26:06,583 INFO L93 Difference]: Finished difference Result 178 states and 185 transitions. [2022-04-05 06:26:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-05 06:26:06,583 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 145 [2022-04-05 06:26:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:26:06,584 INFO L225 Difference]: With dead ends: 178 [2022-04-05 06:26:06,584 INFO L226 Difference]: Without dead ends: 167 [2022-04-05 06:26:06,587 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33239 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=10505, Invalid=58401, Unknown=0, NotChecked=0, Total=68906 [2022-04-05 06:26:06,587 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 280 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:26:06,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 107 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:26:06,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-04-05 06:26:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 157. [2022-04-05 06:26:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 147 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:26:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2022-04-05 06:26:06,609 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 145 [2022-04-05 06:26:06,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:26:06,609 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2022-04-05 06:26:06,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:26:06,609 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2022-04-05 06:26:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-05 06:26:06,610 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:26:06,610 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:26:06,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-04-05 06:26:06,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-04-05 06:26:06,810 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:26:06,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:26:06,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1888123348, now seen corresponding path program 55 times [2022-04-05 06:26:06,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:26:06,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846544486] [2022-04-05 06:26:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:26:06,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:26:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:06,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:26:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:06,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:26:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:07,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-05 06:26:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:08,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:26:08,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846544486] [2022-04-05 06:26:08,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846544486] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:26:08,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940552882] [2022-04-05 06:26:08,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:26:08,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:08,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:26:08,095 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:26:08,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-04-05 06:26:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:08,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-05 06:26:08,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:26:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:10,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:26:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:13,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940552882] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:26:13,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:26:13,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 195 [2022-04-05 06:26:13,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168125402] [2022-04-05 06:26:13,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:26:13,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-04-05 06:26:13,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:26:13,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-04-05 06:26:13,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6167, Invalid=31663, Unknown=0, NotChecked=0, Total=37830 [2022-04-05 06:26:13,051 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:26:15,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:26:15,488 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2022-04-05 06:26:15,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-05 06:26:15,488 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 145 [2022-04-05 06:26:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:26:15,489 INFO L225 Difference]: With dead ends: 173 [2022-04-05 06:26:15,489 INFO L226 Difference]: Without dead ends: 164 [2022-04-05 06:26:15,491 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33269 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10505, Invalid=58401, Unknown=0, NotChecked=0, Total=68906 [2022-04-05 06:26:15,491 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 257 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:26:15,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 95 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:26:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-05 06:26:15,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2022-04-05 06:26:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 150 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:26:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 165 transitions. [2022-04-05 06:26:15,514 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 165 transitions. Word has length 145 [2022-04-05 06:26:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:26:15,515 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 165 transitions. [2022-04-05 06:26:15,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:26:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 165 transitions. [2022-04-05 06:26:15,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-05 06:26:15,515 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:26:15,515 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:26:15,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-04-05 06:26:15,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-04-05 06:26:15,731 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:26:15,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:26:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash -230222854, now seen corresponding path program 56 times [2022-04-05 06:26:15,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:26:15,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933358619] [2022-04-05 06:26:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:26:15,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:26:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:15,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:26:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:15,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:26:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:16,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-05 06:26:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:16,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:26:16,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933358619] [2022-04-05 06:26:16,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933358619] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:26:16,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208731668] [2022-04-05 06:26:16,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:26:16,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:16,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:26:16,751 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:26:16,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-04-05 06:26:17,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:26:17,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:26:17,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-05 06:26:17,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:26:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:18,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:26:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:21,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208731668] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:26:21,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:26:21,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 67, 67] total 194 [2022-04-05 06:26:21,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640847720] [2022-04-05 06:26:21,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:26:21,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-04-05 06:26:21,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:26:21,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-04-05 06:26:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6221, Invalid=31221, Unknown=0, NotChecked=0, Total=37442 [2022-04-05 06:26:21,761 INFO L87 Difference]: Start difference. First operand 160 states and 165 transitions. Second operand has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:26:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:26:24,181 INFO L93 Difference]: Finished difference Result 175 states and 180 transitions. [2022-04-05 06:26:24,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-05 06:26:24,182 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 147 [2022-04-05 06:26:24,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:26:24,182 INFO L225 Difference]: With dead ends: 175 [2022-04-05 06:26:24,182 INFO L226 Difference]: Without dead ends: 163 [2022-04-05 06:26:24,185 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32938 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=10527, Invalid=56813, Unknown=0, NotChecked=0, Total=67340 [2022-04-05 06:26:24,185 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 178 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:26:24,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 122 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:26:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-05 06:26:24,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2022-04-05 06:26:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 147 states have (on average 1.034013605442177) internal successors, (152), 149 states have internal predecessors, (152), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:26:24,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2022-04-05 06:26:24,208 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 147 [2022-04-05 06:26:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:26:24,208 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2022-04-05 06:26:24,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:26:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2022-04-05 06:26:24,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-05 06:26:24,209 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:26:24,209 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:26:24,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-04-05 06:26:24,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:24,409 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:26:24,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:26:24,410 INFO L85 PathProgramCache]: Analyzing trace with hash -529678481, now seen corresponding path program 56 times [2022-04-05 06:26:24,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:26:24,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194674718] [2022-04-05 06:26:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:26:24,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:26:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:24,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:26:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:24,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:26:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:24,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-05 06:26:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:25,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:26:25,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194674718] [2022-04-05 06:26:25,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194674718] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:26:25,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559794280] [2022-04-05 06:26:25,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:26:25,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:25,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:26:25,671 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:26:25,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-04-05 06:26:26,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:26:26,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:26:26,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-05 06:26:26,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:26:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:27,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:26:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:30,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559794280] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:26:30,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:26:30,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 67, 67] total 194 [2022-04-05 06:26:30,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009900677] [2022-04-05 06:26:30,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:26:30,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-04-05 06:26:30,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:26:30,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-04-05 06:26:30,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6221, Invalid=31221, Unknown=0, NotChecked=0, Total=37442 [2022-04-05 06:26:30,459 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:26:32,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:26:32,702 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2022-04-05 06:26:32,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-05 06:26:32,703 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 147 [2022-04-05 06:26:32,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:26:32,703 INFO L225 Difference]: With dead ends: 169 [2022-04-05 06:26:32,703 INFO L226 Difference]: Without dead ends: 159 [2022-04-05 06:26:32,707 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32759 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=10527, Invalid=56813, Unknown=0, NotChecked=0, Total=67340 [2022-04-05 06:26:32,707 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 266 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:26:32,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 95 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:26:32,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-05 06:26:32,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-04-05 06:26:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 148 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:26:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2022-04-05 06:26:32,729 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 147 [2022-04-05 06:26:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:26:32,729 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2022-04-05 06:26:32,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:26:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2022-04-05 06:26:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-05 06:26:32,730 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:26:32,730 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:26:32,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-04-05 06:26:32,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:32,948 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:26:32,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:26:32,948 INFO L85 PathProgramCache]: Analyzing trace with hash -170976491, now seen corresponding path program 57 times [2022-04-05 06:26:32,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:26:32,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591900228] [2022-04-05 06:26:32,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:26:32,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:26:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:32,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:26:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:32,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:26:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:33,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-05 06:26:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:33,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:26:33,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591900228] [2022-04-05 06:26:33,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591900228] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:26:33,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035001729] [2022-04-05 06:26:33,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:26:33,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:33,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:26:34,001 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:26:34,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-04-05 06:26:34,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-04-05 06:26:34,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:26:34,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-05 06:26:34,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:26:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:36,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:26:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:39,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035001729] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:26:39,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:26:39,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 201 [2022-04-05 06:26:39,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114195966] [2022-04-05 06:26:39,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:26:39,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-04-05 06:26:39,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:26:39,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-04-05 06:26:39,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=33643, Unknown=0, NotChecked=0, Total=40200 [2022-04-05 06:26:39,484 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:26:42,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:26:42,120 INFO L93 Difference]: Finished difference Result 182 states and 189 transitions. [2022-04-05 06:26:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-05 06:26:42,120 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 149 [2022-04-05 06:26:42,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:26:42,120 INFO L225 Difference]: With dead ends: 182 [2022-04-05 06:26:42,120 INFO L226 Difference]: Without dead ends: 171 [2022-04-05 06:26:42,123 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35384 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=11161, Invalid=62009, Unknown=0, NotChecked=0, Total=73170 [2022-04-05 06:26:42,124 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 252 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:26:42,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 87 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:26:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-04-05 06:26:42,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 161. [2022-04-05 06:26:42,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 151 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:26:42,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-04-05 06:26:42,147 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 149 [2022-04-05 06:26:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:26:42,147 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-04-05 06:26:42,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:26:42,147 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-04-05 06:26:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-05 06:26:42,148 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:26:42,148 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:26:42,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-04-05 06:26:42,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:42,348 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:26:42,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:26:42,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2055994803, now seen corresponding path program 57 times [2022-04-05 06:26:42,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:26:42,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321761099] [2022-04-05 06:26:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:26:42,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:26:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:42,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:26:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:42,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:26:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:42,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-05 06:26:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:43,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:26:43,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321761099] [2022-04-05 06:26:43,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321761099] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:26:43,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482388208] [2022-04-05 06:26:43,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:26:43,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:43,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:26:43,714 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:26:43,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-04-05 06:26:44,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-04-05 06:26:44,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:26:44,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-05 06:26:44,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:26:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:46,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:26:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:48,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482388208] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:26:48,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:26:48,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 201 [2022-04-05 06:26:48,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424843071] [2022-04-05 06:26:48,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:26:48,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-04-05 06:26:48,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:26:48,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-04-05 06:26:48,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=33643, Unknown=0, NotChecked=0, Total=40200 [2022-04-05 06:26:48,772 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:26:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:26:51,271 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2022-04-05 06:26:51,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-05 06:26:51,271 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 149 [2022-04-05 06:26:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:26:51,271 INFO L225 Difference]: With dead ends: 177 [2022-04-05 06:26:51,271 INFO L226 Difference]: Without dead ends: 168 [2022-04-05 06:26:51,275 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35415 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=11161, Invalid=62009, Unknown=0, NotChecked=0, Total=73170 [2022-04-05 06:26:51,275 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 265 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:26:51,275 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 80 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:26:51,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-04-05 06:26:51,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2022-04-05 06:26:51,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.0394736842105263) internal successors, (158), 154 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:26:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 169 transitions. [2022-04-05 06:26:51,299 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 169 transitions. Word has length 149 [2022-04-05 06:26:51,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:26:51,299 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 169 transitions. [2022-04-05 06:26:51,300 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:26:51,300 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 169 transitions. [2022-04-05 06:26:51,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-05 06:26:51,300 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:26:51,300 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:26:51,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-04-05 06:26:51,514 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:51,515 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:26:51,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:26:51,515 INFO L85 PathProgramCache]: Analyzing trace with hash -2114511847, now seen corresponding path program 58 times [2022-04-05 06:26:51,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:26:51,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426961113] [2022-04-05 06:26:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:26:51,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:26:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:51,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:26:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:51,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:26:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:52,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-05 06:26:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:26:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:52,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:26:52,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426961113] [2022-04-05 06:26:52,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426961113] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:26:52,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412367768] [2022-04-05 06:26:52,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:26:52,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:26:52,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:26:52,536 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:26:52,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-04-05 06:26:52,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:26:52,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:26:52,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-05 06:26:52,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:26:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:54,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:26:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:26:57,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412367768] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:26:57,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:26:57,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 69, 69] total 200 [2022-04-05 06:26:57,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939089062] [2022-04-05 06:26:57,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:26:57,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-04-05 06:26:57,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:26:57,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-04-05 06:26:57,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6613, Invalid=33187, Unknown=0, NotChecked=0, Total=39800 [2022-04-05 06:26:57,718 INFO L87 Difference]: Start difference. First operand 164 states and 169 transitions. Second operand has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:27:00,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:27:00,044 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2022-04-05 06:27:00,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-05 06:27:00,045 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 151 [2022-04-05 06:27:00,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:27:00,045 INFO L225 Difference]: With dead ends: 179 [2022-04-05 06:27:00,045 INFO L226 Difference]: Without dead ends: 167 [2022-04-05 06:27:00,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35073 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=11185, Invalid=60371, Unknown=0, NotChecked=0, Total=71556 [2022-04-05 06:27:00,049 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 198 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:27:00,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 82 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:27:00,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-04-05 06:27:00,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2022-04-05 06:27:00,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 151 states have (on average 1.033112582781457) internal successors, (156), 153 states have internal predecessors, (156), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:27:00,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 167 transitions. [2022-04-05 06:27:00,074 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 167 transitions. Word has length 151 [2022-04-05 06:27:00,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:27:00,074 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 167 transitions. [2022-04-05 06:27:00,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:27:00,074 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 167 transitions. [2022-04-05 06:27:00,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-05 06:27:00,075 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:27:00,075 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:27:00,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-04-05 06:27:00,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:27:00,279 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:27:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:27:00,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2139063666, now seen corresponding path program 58 times [2022-04-05 06:27:00,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:27:00,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263232091] [2022-04-05 06:27:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:27:00,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:27:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:00,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:27:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:00,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:27:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:00,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-05 06:27:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:01,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:27:01,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263232091] [2022-04-05 06:27:01,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263232091] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:27:01,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194650252] [2022-04-05 06:27:01,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:27:01,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:27:01,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:27:01,618 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:27:01,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-04-05 06:27:02,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:27:02,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:27:02,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-05 06:27:02,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:27:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:03,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:27:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:06,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194650252] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:27:06,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:27:06,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 69, 69] total 200 [2022-04-05 06:27:06,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261488094] [2022-04-05 06:27:06,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:27:06,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-04-05 06:27:06,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:27:06,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-04-05 06:27:06,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6613, Invalid=33187, Unknown=0, NotChecked=0, Total=39800 [2022-04-05 06:27:06,664 INFO L87 Difference]: Start difference. First operand 163 states and 167 transitions. Second operand has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:27:09,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:27:09,129 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2022-04-05 06:27:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-05 06:27:09,130 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 151 [2022-04-05 06:27:09,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:27:09,130 INFO L225 Difference]: With dead ends: 173 [2022-04-05 06:27:09,130 INFO L226 Difference]: Without dead ends: 163 [2022-04-05 06:27:09,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34888 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=11185, Invalid=60371, Unknown=0, NotChecked=0, Total=71556 [2022-04-05 06:27:09,134 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 232 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:27:09,134 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 110 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:27:09,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-05 06:27:09,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-04-05 06:27:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 152 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:27:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2022-04-05 06:27:09,159 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 151 [2022-04-05 06:27:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:27:09,159 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2022-04-05 06:27:09,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:27:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2022-04-05 06:27:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-05 06:27:09,160 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:27:09,160 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:27:09,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-04-05 06:27:09,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-04-05 06:27:09,360 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:27:09,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:27:09,361 INFO L85 PathProgramCache]: Analyzing trace with hash -601912716, now seen corresponding path program 59 times [2022-04-05 06:27:09,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:27:09,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664348373] [2022-04-05 06:27:09,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:27:09,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:27:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:09,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:27:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:09,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:27:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:09,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-05 06:27:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:10,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:27:10,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664348373] [2022-04-05 06:27:10,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664348373] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:27:10,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491176462] [2022-04-05 06:27:10,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:27:10,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:27:10,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:27:10,466 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:27:10,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-04-05 06:27:10,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-04-05 06:27:10,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:27:10,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-05 06:27:10,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:27:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:12,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:27:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:16,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491176462] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:27:16,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:27:16,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 207 [2022-04-05 06:27:16,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058937978] [2022-04-05 06:27:16,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:27:16,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2022-04-05 06:27:16,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:27:16,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2022-04-05 06:27:16,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6959, Invalid=35683, Unknown=0, NotChecked=0, Total=42642 [2022-04-05 06:27:16,177 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:27:19,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:27:19,061 INFO L93 Difference]: Finished difference Result 186 states and 193 transitions. [2022-04-05 06:27:19,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-05 06:27:19,071 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 153 [2022-04-05 06:27:19,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:27:19,072 INFO L225 Difference]: With dead ends: 186 [2022-04-05 06:27:19,072 INFO L226 Difference]: Without dead ends: 175 [2022-04-05 06:27:19,077 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 171 SyntacticMatches, 5 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37596 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=11837, Invalid=65725, Unknown=0, NotChecked=0, Total=77562 [2022-04-05 06:27:19,077 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 250 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:27:19,078 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 97 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:27:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-05 06:27:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2022-04-05 06:27:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 155 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:27:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2022-04-05 06:27:19,103 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 153 [2022-04-05 06:27:19,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:27:19,103 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2022-04-05 06:27:19,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:27:19,104 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2022-04-05 06:27:19,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-05 06:27:19,104 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:27:19,104 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:27:19,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-04-05 06:27:19,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-04-05 06:27:19,319 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:27:19,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:27:19,320 INFO L85 PathProgramCache]: Analyzing trace with hash 634290514, now seen corresponding path program 59 times [2022-04-05 06:27:19,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:27:19,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789291836] [2022-04-05 06:27:19,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:27:19,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:27:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:19,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:27:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:19,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:27:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:19,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-05 06:27:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:20,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:27:20,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789291836] [2022-04-05 06:27:20,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789291836] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:27:20,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946846957] [2022-04-05 06:27:20,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:27:20,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:27:20,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:27:20,750 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:27:20,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-04-05 06:27:21,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-04-05 06:27:21,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:27:21,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-05 06:27:21,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:27:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:23,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:27:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:26,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946846957] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:27:26,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:27:26,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 207 [2022-04-05 06:27:26,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810148945] [2022-04-05 06:27:26,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:27:26,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2022-04-05 06:27:26,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:27:26,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2022-04-05 06:27:26,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6959, Invalid=35683, Unknown=0, NotChecked=0, Total=42642 [2022-04-05 06:27:26,299 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:27:29,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:27:29,203 INFO L93 Difference]: Finished difference Result 181 states and 186 transitions. [2022-04-05 06:27:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-05 06:27:29,204 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 153 [2022-04-05 06:27:29,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:27:29,204 INFO L225 Difference]: With dead ends: 181 [2022-04-05 06:27:29,204 INFO L226 Difference]: Without dead ends: 172 [2022-04-05 06:27:29,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 171 SyntacticMatches, 5 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37628 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=11837, Invalid=65725, Unknown=0, NotChecked=0, Total=77562 [2022-04-05 06:27:29,208 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 321 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:27:29,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 120 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:27:29,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-05 06:27:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2022-04-05 06:27:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 156 states have (on average 1.0384615384615385) internal successors, (162), 158 states have internal predecessors, (162), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:27:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2022-04-05 06:27:29,235 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 153 [2022-04-05 06:27:29,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:27:29,235 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2022-04-05 06:27:29,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:27:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2022-04-05 06:27:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-05 06:27:29,236 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:27:29,236 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:27:29,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-04-05 06:27:29,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-04-05 06:27:29,444 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:27:29,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:27:29,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1722233848, now seen corresponding path program 60 times [2022-04-05 06:27:29,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:27:29,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382761300] [2022-04-05 06:27:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:27:29,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:27:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:29,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:27:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:29,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:27:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:29,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-05 06:27:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:30,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:27:30,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382761300] [2022-04-05 06:27:30,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382761300] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:27:30,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738726565] [2022-04-05 06:27:30,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:27:30,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:27:30,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:27:30,567 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:27:30,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-04-05 06:27:31,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2022-04-05 06:27:31,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:27:31,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 70 conjunts are in the unsatisfiable core [2022-04-05 06:27:31,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:27:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:32,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:27:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:36,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738726565] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:27:36,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:27:36,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 71, 71] total 206 [2022-04-05 06:27:36,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208674272] [2022-04-05 06:27:36,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:27:36,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2022-04-05 06:27:36,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:27:36,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2022-04-05 06:27:36,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7017, Invalid=35213, Unknown=0, NotChecked=0, Total=42230 [2022-04-05 06:27:36,247 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:27:38,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:27:38,907 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2022-04-05 06:27:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-05 06:27:38,907 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 155 [2022-04-05 06:27:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:27:38,908 INFO L225 Difference]: With dead ends: 183 [2022-04-05 06:27:38,908 INFO L226 Difference]: Without dead ends: 171 [2022-04-05 06:27:38,912 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37275 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=11863, Invalid=64037, Unknown=0, NotChecked=0, Total=75900 [2022-04-05 06:27:38,912 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 301 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:27:38,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 97 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:27:38,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-04-05 06:27:38,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2022-04-05 06:27:38,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 155 states have (on average 1.032258064516129) internal successors, (160), 157 states have internal predecessors, (160), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:27:38,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 171 transitions. [2022-04-05 06:27:38,938 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 171 transitions. Word has length 155 [2022-04-05 06:27:38,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:27:38,939 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 171 transitions. [2022-04-05 06:27:38,939 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:27:38,939 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 171 transitions. [2022-04-05 06:27:38,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-05 06:27:38,939 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:27:38,939 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:27:38,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-04-05 06:27:39,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-04-05 06:27:39,140 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:27:39,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:27:39,140 INFO L85 PathProgramCache]: Analyzing trace with hash -407730835, now seen corresponding path program 60 times [2022-04-05 06:27:39,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:27:39,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21829384] [2022-04-05 06:27:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:27:39,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:27:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:39,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:27:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:39,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:27:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:39,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-05 06:27:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:40,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:27:40,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21829384] [2022-04-05 06:27:40,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21829384] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:27:40,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974664959] [2022-04-05 06:27:40,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:27:40,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:27:40,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:27:40,565 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:27:40,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-04-05 06:27:41,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2022-04-05 06:27:41,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:27:41,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 70 conjunts are in the unsatisfiable core [2022-04-05 06:27:41,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:27:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:42,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:27:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:45,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974664959] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:27:45,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:27:45,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 71, 71] total 206 [2022-04-05 06:27:45,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344049076] [2022-04-05 06:27:45,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:27:45,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2022-04-05 06:27:45,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:27:45,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2022-04-05 06:27:45,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7017, Invalid=35213, Unknown=0, NotChecked=0, Total=42230 [2022-04-05 06:27:45,904 INFO L87 Difference]: Start difference. First operand 167 states and 171 transitions. Second operand has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:27:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:27:48,554 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2022-04-05 06:27:48,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-05 06:27:48,554 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 155 [2022-04-05 06:27:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:27:48,555 INFO L225 Difference]: With dead ends: 177 [2022-04-05 06:27:48,555 INFO L226 Difference]: Without dead ends: 167 [2022-04-05 06:27:48,560 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37084 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=11863, Invalid=64037, Unknown=0, NotChecked=0, Total=75900 [2022-04-05 06:27:48,560 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 226 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:27:48,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 115 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:27:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-04-05 06:27:48,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-04-05 06:27:48,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 154 states have (on average 1.025974025974026) internal successors, (158), 156 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:27:48,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2022-04-05 06:27:48,602 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 155 [2022-04-05 06:27:48,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:27:48,602 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2022-04-05 06:27:48,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:27:48,602 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2022-04-05 06:27:48,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-05 06:27:48,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:27:48,602 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:27:48,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-04-05 06:27:48,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:27:48,811 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:27:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:27:48,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1056594323, now seen corresponding path program 61 times [2022-04-05 06:27:48,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:27:48,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776227264] [2022-04-05 06:27:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:27:48,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:27:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:48,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:27:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:48,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:27:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:49,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-05 06:27:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:49,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:27:49,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776227264] [2022-04-05 06:27:49,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776227264] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:27:49,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963313383] [2022-04-05 06:27:49,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:27:49,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:27:49,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:27:49,964 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:27:49,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-04-05 06:27:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:50,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-05 06:27:50,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:27:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:52,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:27:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:27:55,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963313383] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:27:55,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:27:55,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 213 [2022-04-05 06:27:55,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611822360] [2022-04-05 06:27:55,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:27:55,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-04-05 06:27:55,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:27:55,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-04-05 06:27:55,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7373, Invalid=37783, Unknown=0, NotChecked=0, Total=45156 [2022-04-05 06:27:55,954 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:27:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:27:58,738 INFO L93 Difference]: Finished difference Result 190 states and 197 transitions. [2022-04-05 06:27:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-05 06:27:58,739 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 157 [2022-04-05 06:27:58,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:27:58,740 INFO L225 Difference]: With dead ends: 190 [2022-04-05 06:27:58,740 INFO L226 Difference]: Without dead ends: 179 [2022-04-05 06:27:58,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 175 SyntacticMatches, 5 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39875 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=12533, Invalid=69549, Unknown=0, NotChecked=0, Total=82082 [2022-04-05 06:27:58,744 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 346 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:27:58,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 77 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:27:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-04-05 06:27:58,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 169. [2022-04-05 06:27:58,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 159 states have internal predecessors, (162), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:27:58,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2022-04-05 06:27:58,773 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 157 [2022-04-05 06:27:58,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:27:58,773 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2022-04-05 06:27:58,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:27:58,773 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2022-04-05 06:27:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-05 06:27:58,773 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:27:58,774 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:27:58,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-04-05 06:27:58,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:27:58,983 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:27:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:27:58,984 INFO L85 PathProgramCache]: Analyzing trace with hash -647539535, now seen corresponding path program 61 times [2022-04-05 06:27:58,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:27:58,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675565805] [2022-04-05 06:27:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:27:58,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:27:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:59,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:27:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:59,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:27:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:27:59,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-05 06:27:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:00,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:28:00,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675565805] [2022-04-05 06:28:00,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675565805] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:28:00,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251502837] [2022-04-05 06:28:00,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:28:00,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:28:00,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:28:00,472 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:28:00,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-04-05 06:28:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:00,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-05 06:28:00,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:28:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:03,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:28:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:06,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251502837] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:28:06,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:28:06,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 213 [2022-04-05 06:28:06,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535622857] [2022-04-05 06:28:06,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:28:06,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-04-05 06:28:06,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:28:06,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-04-05 06:28:06,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7373, Invalid=37783, Unknown=0, NotChecked=0, Total=45156 [2022-04-05 06:28:06,144 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:28:09,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:28:09,095 INFO L93 Difference]: Finished difference Result 185 states and 190 transitions. [2022-04-05 06:28:09,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-05 06:28:09,095 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 157 [2022-04-05 06:28:09,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:28:09,096 INFO L225 Difference]: With dead ends: 185 [2022-04-05 06:28:09,096 INFO L226 Difference]: Without dead ends: 176 [2022-04-05 06:28:09,099 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 175 SyntacticMatches, 5 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39908 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=12533, Invalid=69549, Unknown=0, NotChecked=0, Total=82082 [2022-04-05 06:28:09,099 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 212 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:28:09,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 95 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:28:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-04-05 06:28:09,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2022-04-05 06:28:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 160 states have (on average 1.0375) internal successors, (166), 162 states have internal predecessors, (166), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:28:09,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 177 transitions. [2022-04-05 06:28:09,127 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 177 transitions. Word has length 157 [2022-04-05 06:28:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:28:09,127 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 177 transitions. [2022-04-05 06:28:09,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:28:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 177 transitions. [2022-04-05 06:28:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-05 06:28:09,128 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:28:09,128 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:28:09,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-04-05 06:28:09,328 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-04-05 06:28:09,328 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:28:09,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:28:09,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1755796585, now seen corresponding path program 62 times [2022-04-05 06:28:09,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:28:09,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061224720] [2022-04-05 06:28:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:28:09,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:28:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:09,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:28:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:09,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:28:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:09,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-05 06:28:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:10,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:28:10,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061224720] [2022-04-05 06:28:10,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061224720] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:28:10,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358481115] [2022-04-05 06:28:10,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:28:10,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:28:10,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:28:10,491 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:28:10,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-04-05 06:28:10,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:28:10,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:28:10,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-05 06:28:10,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:28:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:13,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:28:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1089 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:16,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358481115] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:28:16,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:28:16,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 73, 73] total 212 [2022-04-05 06:28:16,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321382676] [2022-04-05 06:28:16,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:28:16,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2022-04-05 06:28:16,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:28:16,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2022-04-05 06:28:16,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7433, Invalid=37299, Unknown=0, NotChecked=0, Total=44732 [2022-04-05 06:28:16,482 INFO L87 Difference]: Start difference. First operand 172 states and 177 transitions. Second operand has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:28:19,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:28:19,260 INFO L93 Difference]: Finished difference Result 187 states and 192 transitions. [2022-04-05 06:28:19,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-05 06:28:19,261 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 159 [2022-04-05 06:28:19,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:28:19,262 INFO L225 Difference]: With dead ends: 187 [2022-04-05 06:28:19,262 INFO L226 Difference]: Without dead ends: 175 [2022-04-05 06:28:19,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 181 SyntacticMatches, 5 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39544 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=12561, Invalid=67811, Unknown=0, NotChecked=0, Total=80372 [2022-04-05 06:28:19,267 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 156 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:28:19,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 112 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:28:19,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-05 06:28:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2022-04-05 06:28:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 159 states have (on average 1.0314465408805031) internal successors, (164), 161 states have internal predecessors, (164), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:28:19,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2022-04-05 06:28:19,295 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 159 [2022-04-05 06:28:19,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:28:19,295 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2022-04-05 06:28:19,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:28:19,295 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2022-04-05 06:28:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-05 06:28:19,296 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:28:19,296 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:28:19,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-04-05 06:28:19,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-04-05 06:28:19,497 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:28:19,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:28:19,497 INFO L85 PathProgramCache]: Analyzing trace with hash 37040140, now seen corresponding path program 62 times [2022-04-05 06:28:19,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:28:19,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202976123] [2022-04-05 06:28:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:28:19,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:28:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:19,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:28:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:19,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:28:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:20,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-05 06:28:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:20,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:28:20,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202976123] [2022-04-05 06:28:20,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202976123] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:28:20,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503378587] [2022-04-05 06:28:20,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:28:20,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:28:20,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:28:20,979 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:28:20,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-04-05 06:28:21,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:28:21,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:28:21,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-05 06:28:21,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:28:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:23,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:28:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1089 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:26,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503378587] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:28:26,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:28:26,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 73, 73] total 212 [2022-04-05 06:28:26,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410676107] [2022-04-05 06:28:26,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:28:26,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2022-04-05 06:28:26,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:28:26,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2022-04-05 06:28:26,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7433, Invalid=37299, Unknown=0, NotChecked=0, Total=44732 [2022-04-05 06:28:26,524 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:28:29,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:28:29,499 INFO L93 Difference]: Finished difference Result 181 states and 184 transitions. [2022-04-05 06:28:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-05 06:28:29,500 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 159 [2022-04-05 06:28:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:28:29,500 INFO L225 Difference]: With dead ends: 181 [2022-04-05 06:28:29,500 INFO L226 Difference]: Without dead ends: 171 [2022-04-05 06:28:29,504 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 181 SyntacticMatches, 5 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39347 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=12561, Invalid=67811, Unknown=0, NotChecked=0, Total=80372 [2022-04-05 06:28:29,504 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 224 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2414 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:28:29,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 145 Invalid, 2574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2414 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 06:28:29,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-04-05 06:28:29,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-04-05 06:28:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 160 states have internal predecessors, (162), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:28:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 173 transitions. [2022-04-05 06:28:29,531 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 173 transitions. Word has length 159 [2022-04-05 06:28:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:28:29,532 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 173 transitions. [2022-04-05 06:28:29,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:28:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 173 transitions. [2022-04-05 06:28:29,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-05 06:28:29,532 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:28:29,532 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:28:29,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-04-05 06:28:29,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:28:29,739 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:28:29,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:28:29,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1015228302, now seen corresponding path program 63 times [2022-04-05 06:28:29,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:28:29,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784380343] [2022-04-05 06:28:29,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:28:29,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:28:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:29,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:28:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:29,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:28:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:30,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-05 06:28:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:31,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:28:31,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784380343] [2022-04-05 06:28:31,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784380343] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:28:31,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212596337] [2022-04-05 06:28:31,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:28:31,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:28:31,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:28:31,005 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:28:31,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-04-05 06:28:31,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-04-05 06:28:31,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:28:31,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-05 06:28:31,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:28:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:33,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:28:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:37,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212596337] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:28:37,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:28:37,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 219 [2022-04-05 06:28:37,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331612547] [2022-04-05 06:28:37,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:28:37,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 219 states [2022-04-05 06:28:37,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:28:37,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 219 interpolants. [2022-04-05 06:28:37,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7799, Invalid=39943, Unknown=0, NotChecked=0, Total=47742 [2022-04-05 06:28:37,312 INFO L87 Difference]: Start difference. First operand 170 states and 173 transitions. Second operand has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:28:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:28:40,614 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2022-04-05 06:28:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-05 06:28:40,615 INFO L78 Accepts]: Start accepts. Automaton has has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 161 [2022-04-05 06:28:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:28:40,615 INFO L225 Difference]: With dead ends: 194 [2022-04-05 06:28:40,615 INFO L226 Difference]: Without dead ends: 183 [2022-04-05 06:28:40,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 179 SyntacticMatches, 5 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42221 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=13249, Invalid=73481, Unknown=0, NotChecked=0, Total=86730 [2022-04-05 06:28:40,620 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 261 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:28:40,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 142 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2371 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 06:28:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-04-05 06:28:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 173. [2022-04-05 06:28:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 161 states have (on average 1.031055900621118) internal successors, (166), 163 states have internal predecessors, (166), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:28:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2022-04-05 06:28:40,648 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 161 [2022-04-05 06:28:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:28:40,648 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2022-04-05 06:28:40,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:28:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2022-04-05 06:28:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-05 06:28:40,648 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:28:40,649 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:28:40,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-04-05 06:28:40,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:28:40,849 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:28:40,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:28:40,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2000144336, now seen corresponding path program 63 times [2022-04-05 06:28:40,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:28:40,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843439524] [2022-04-05 06:28:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:28:40,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:28:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:40,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:28:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:40,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:28:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:41,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-05 06:28:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:42,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:28:42,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843439524] [2022-04-05 06:28:42,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843439524] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:28:42,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237811414] [2022-04-05 06:28:42,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:28:42,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:28:42,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:28:42,418 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:28:42,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-04-05 06:28:42,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-04-05 06:28:42,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:28:42,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-05 06:28:42,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:28:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:45,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:28:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:48,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237811414] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:28:48,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:28:48,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 219 [2022-04-05 06:28:48,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790347258] [2022-04-05 06:28:48,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:28:48,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 219 states [2022-04-05 06:28:48,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:28:48,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 219 interpolants. [2022-04-05 06:28:48,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7799, Invalid=39943, Unknown=0, NotChecked=0, Total=47742 [2022-04-05 06:28:48,419 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:28:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:28:51,603 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2022-04-05 06:28:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-05 06:28:51,604 INFO L78 Accepts]: Start accepts. Automaton has has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 161 [2022-04-05 06:28:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:28:51,604 INFO L225 Difference]: With dead ends: 189 [2022-04-05 06:28:51,604 INFO L226 Difference]: Without dead ends: 180 [2022-04-05 06:28:51,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 179 SyntacticMatches, 5 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42255 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=13249, Invalid=73481, Unknown=0, NotChecked=0, Total=86730 [2022-04-05 06:28:51,610 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 319 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2063 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:28:51,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 120 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2063 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:28:51,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-04-05 06:28:51,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2022-04-05 06:28:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 164 states have (on average 1.0365853658536586) internal successors, (170), 166 states have internal predecessors, (170), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:28:51,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 181 transitions. [2022-04-05 06:28:51,639 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 181 transitions. Word has length 161 [2022-04-05 06:28:51,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:28:51,639 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 181 transitions. [2022-04-05 06:28:51,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:28:51,639 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 181 transitions. [2022-04-05 06:28:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-05 06:28:51,640 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:28:51,640 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:28:51,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-04-05 06:28:51,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:28:51,856 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:28:51,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:28:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash 47764214, now seen corresponding path program 64 times [2022-04-05 06:28:51,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:28:51,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594415990] [2022-04-05 06:28:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:28:51,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:28:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:51,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:28:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:51,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:28:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:52,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-05 06:28:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:28:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1089 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:53,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:28:53,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594415990] [2022-04-05 06:28:53,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594415990] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:28:53,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072532014] [2022-04-05 06:28:53,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:28:53,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:28:53,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:28:53,077 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:28:53,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-04-05 06:28:53,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:28:53,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:28:53,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-05 06:28:53,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:28:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1089 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:55,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:28:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1156 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:28:59,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072532014] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:28:59,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:28:59,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 75, 75] total 218 [2022-04-05 06:28:59,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100983149] [2022-04-05 06:28:59,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:28:59,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2022-04-05 06:28:59,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:28:59,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2022-04-05 06:28:59,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7861, Invalid=39445, Unknown=0, NotChecked=0, Total=47306 [2022-04-05 06:28:59,243 INFO L87 Difference]: Start difference. First operand 176 states and 181 transitions. Second operand has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:29:02,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:29:02,208 INFO L93 Difference]: Finished difference Result 191 states and 196 transitions. [2022-04-05 06:29:02,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-05 06:29:02,208 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 163 [2022-04-05 06:29:02,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:29:02,209 INFO L225 Difference]: With dead ends: 191 [2022-04-05 06:29:02,209 INFO L226 Difference]: Without dead ends: 179 [2022-04-05 06:29:02,212 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 185 SyntacticMatches, 5 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41880 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=13279, Invalid=71693, Unknown=0, NotChecked=0, Total=84972 [2022-04-05 06:29:02,212 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 275 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:29:02,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 142 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:29:02,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-04-05 06:29:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2022-04-05 06:29:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 163 states have (on average 1.030674846625767) internal successors, (168), 165 states have internal predecessors, (168), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:29:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 179 transitions. [2022-04-05 06:29:02,241 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 179 transitions. Word has length 163 [2022-04-05 06:29:02,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:29:02,241 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 179 transitions. [2022-04-05 06:29:02,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:29:02,242 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 179 transitions. [2022-04-05 06:29:02,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-05 06:29:02,242 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:29:02,242 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:29:02,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-04-05 06:29:02,442 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-04-05 06:29:02,443 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:29:02,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:29:02,443 INFO L85 PathProgramCache]: Analyzing trace with hash 671468139, now seen corresponding path program 64 times [2022-04-05 06:29:02,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:29:02,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979698271] [2022-04-05 06:29:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:29:02,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:29:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:02,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:29:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:02,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:29:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:03,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-05 06:29:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1089 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:04,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:29:04,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979698271] [2022-04-05 06:29:04,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979698271] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:29:04,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260718507] [2022-04-05 06:29:04,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:29:04,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:29:04,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:29:04,013 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:29:04,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-04-05 06:29:04,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:29:04,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:29:04,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-05 06:29:04,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:29:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1089 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:06,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:29:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1156 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:09,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260718507] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:29:09,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:29:09,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 75, 75] total 218 [2022-04-05 06:29:09,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651311964] [2022-04-05 06:29:09,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:29:09,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2022-04-05 06:29:09,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:29:09,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2022-04-05 06:29:09,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7861, Invalid=39445, Unknown=0, NotChecked=0, Total=47306 [2022-04-05 06:29:09,847 INFO L87 Difference]: Start difference. First operand 175 states and 179 transitions. Second operand has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:29:12,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:29:12,622 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2022-04-05 06:29:12,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-05 06:29:12,623 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 163 [2022-04-05 06:29:12,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:29:12,623 INFO L225 Difference]: With dead ends: 185 [2022-04-05 06:29:12,623 INFO L226 Difference]: Without dead ends: 175 [2022-04-05 06:29:12,627 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 185 SyntacticMatches, 5 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41677 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=13279, Invalid=71693, Unknown=0, NotChecked=0, Total=84972 [2022-04-05 06:29:12,628 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 216 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 06:29:12,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 100 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 06:29:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-05 06:29:12,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-04-05 06:29:12,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 164 states have internal predecessors, (166), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:29:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 177 transitions. [2022-04-05 06:29:12,658 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 177 transitions. Word has length 163 [2022-04-05 06:29:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:29:12,658 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 177 transitions. [2022-04-05 06:29:12,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:29:12,658 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 177 transitions. [2022-04-05 06:29:12,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-05 06:29:12,658 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:29:12,658 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:29:12,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-04-05 06:29:12,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-04-05 06:29:12,859 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:29:12,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:29:12,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1215277295, now seen corresponding path program 65 times [2022-04-05 06:29:12,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:29:12,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964813468] [2022-04-05 06:29:12,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:29:12,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:29:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:12,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:29:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:12,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:29:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:13,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-05 06:29:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:14,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:29:14,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964813468] [2022-04-05 06:29:14,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964813468] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:29:14,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401108743] [2022-04-05 06:29:14,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:29:14,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:29:14,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:29:14,142 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:29:14,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-04-05 06:29:14,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-04-05 06:29:14,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:29:14,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-05 06:29:14,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:29:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:16,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:29:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:20,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401108743] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:29:20,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:29:20,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 225 [2022-04-05 06:29:20,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618044363] [2022-04-05 06:29:20,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:29:20,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 225 states [2022-04-05 06:29:20,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:29:20,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 225 interpolants. [2022-04-05 06:29:20,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8237, Invalid=42163, Unknown=0, NotChecked=0, Total=50400 [2022-04-05 06:29:20,712 INFO L87 Difference]: Start difference. First operand 174 states and 177 transitions. Second operand has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:29:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:29:24,110 INFO L93 Difference]: Finished difference Result 198 states and 205 transitions. [2022-04-05 06:29:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-05 06:29:24,111 INFO L78 Accepts]: Start accepts. Automaton has has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 165 [2022-04-05 06:29:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:29:24,111 INFO L225 Difference]: With dead ends: 198 [2022-04-05 06:29:24,111 INFO L226 Difference]: Without dead ends: 187 [2022-04-05 06:29:24,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 183 SyntacticMatches, 5 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44634 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=13985, Invalid=77521, Unknown=0, NotChecked=0, Total=91506 [2022-04-05 06:29:24,116 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 234 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:29:24,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 137 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 06:29:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-05 06:29:24,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2022-04-05 06:29:24,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 165 states have (on average 1.0303030303030303) internal successors, (170), 167 states have internal predecessors, (170), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:29:24,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-04-05 06:29:24,161 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 165 [2022-04-05 06:29:24,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:29:24,161 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-04-05 06:29:24,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:29:24,161 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-04-05 06:29:24,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-05 06:29:24,162 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:29:24,162 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:29:24,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-04-05 06:29:24,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-04-05 06:29:24,363 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:29:24,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:29:24,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1760373423, now seen corresponding path program 65 times [2022-04-05 06:29:24,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:29:24,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567264088] [2022-04-05 06:29:24,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:29:24,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:29:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:24,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:29:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:24,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:29:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:25,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-05 06:29:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:26,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:29:26,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567264088] [2022-04-05 06:29:26,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567264088] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:29:26,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842686901] [2022-04-05 06:29:26,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:29:26,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:29:26,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:29:26,022 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:29:26,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-04-05 06:29:26,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-04-05 06:29:26,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:29:26,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-05 06:29:26,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:29:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:28,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:29:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:32,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842686901] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:29:32,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:29:32,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 225 [2022-04-05 06:29:32,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68901891] [2022-04-05 06:29:32,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:29:32,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 225 states [2022-04-05 06:29:32,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:29:32,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 225 interpolants. [2022-04-05 06:29:32,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8237, Invalid=42163, Unknown=0, NotChecked=0, Total=50400 [2022-04-05 06:29:32,290 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:29:35,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:29:35,548 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2022-04-05 06:29:35,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-05 06:29:35,549 INFO L78 Accepts]: Start accepts. Automaton has has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 165 [2022-04-05 06:29:35,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:29:35,549 INFO L225 Difference]: With dead ends: 193 [2022-04-05 06:29:35,549 INFO L226 Difference]: Without dead ends: 184 [2022-04-05 06:29:35,553 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 183 SyntacticMatches, 5 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44669 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=13985, Invalid=77521, Unknown=0, NotChecked=0, Total=91506 [2022-04-05 06:29:35,553 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 315 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:29:35,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 115 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:29:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-04-05 06:29:35,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2022-04-05 06:29:35,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 168 states have (on average 1.0357142857142858) internal successors, (174), 170 states have internal predecessors, (174), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:29:35,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2022-04-05 06:29:35,584 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 165 [2022-04-05 06:29:35,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:29:35,584 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2022-04-05 06:29:35,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:29:35,584 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2022-04-05 06:29:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-05 06:29:35,585 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:29:35,585 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:29:35,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-04-05 06:29:35,785 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-04-05 06:29:35,785 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:29:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:29:35,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1556150805, now seen corresponding path program 66 times [2022-04-05 06:29:35,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:29:35,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908359064] [2022-04-05 06:29:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:29:35,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:29:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:35,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:29:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:35,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:29:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:36,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-05 06:29:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1156 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:37,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:29:37,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908359064] [2022-04-05 06:29:37,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908359064] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:29:37,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178402341] [2022-04-05 06:29:37,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:29:37,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:29:37,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:29:37,063 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:29:37,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-04-05 06:29:37,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2022-04-05 06:29:37,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:29:37,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-05 06:29:37,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:29:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1156 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:39,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:29:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1225 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:43,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178402341] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:29:43,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:29:43,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 77, 77] total 224 [2022-04-05 06:29:43,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420686197] [2022-04-05 06:29:43,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:29:43,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 224 states [2022-04-05 06:29:43,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:29:43,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2022-04-05 06:29:43,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8301, Invalid=41651, Unknown=0, NotChecked=0, Total=49952 [2022-04-05 06:29:43,574 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand has 224 states, 224 states have (on average 2.0) internal successors, (448), 223 states have internal predecessors, (448), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:29:46,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:29:46,818 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2022-04-05 06:29:46,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-05 06:29:46,818 INFO L78 Accepts]: Start accepts. Automaton has has 224 states, 224 states have (on average 2.0) internal successors, (448), 223 states have internal predecessors, (448), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 167 [2022-04-05 06:29:46,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:29:46,819 INFO L225 Difference]: With dead ends: 195 [2022-04-05 06:29:46,819 INFO L226 Difference]: Without dead ends: 183 [2022-04-05 06:29:46,822 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 189 SyntacticMatches, 5 SemanticMatches, 298 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44283 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=14017, Invalid=75683, Unknown=0, NotChecked=0, Total=89700 [2022-04-05 06:29:46,822 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 169 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2276 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 06:29:46,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 132 Invalid, 2406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2276 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 06:29:46,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-04-05 06:29:46,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2022-04-05 06:29:46,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 167 states have (on average 1.029940119760479) internal successors, (172), 169 states have internal predecessors, (172), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:29:46,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 183 transitions. [2022-04-05 06:29:46,853 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 183 transitions. Word has length 167 [2022-04-05 06:29:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:29:46,853 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 183 transitions. [2022-04-05 06:29:46,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 224 states, 224 states have (on average 2.0) internal successors, (448), 223 states have internal predecessors, (448), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:29:46,853 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 183 transitions. [2022-04-05 06:29:46,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-05 06:29:46,854 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:29:46,854 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:29:46,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-04-05 06:29:47,054 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:29:47,054 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:29:47,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:29:47,054 INFO L85 PathProgramCache]: Analyzing trace with hash -370301814, now seen corresponding path program 66 times [2022-04-05 06:29:47,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:29:47,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584193737] [2022-04-05 06:29:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:29:47,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:29:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:47,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:29:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:47,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:29:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:47,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-05 06:29:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1156 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:48,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:29:48,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584193737] [2022-04-05 06:29:48,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584193737] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:29:48,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397015954] [2022-04-05 06:29:48,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:29:48,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:29:48,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:29:48,720 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:29:48,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-04-05 06:29:49,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2022-04-05 06:29:49,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:29:49,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-05 06:29:49,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:29:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1156 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:51,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:29:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1225 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:54,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397015954] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:29:54,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:29:54,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 77, 77] total 224 [2022-04-05 06:29:54,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940380868] [2022-04-05 06:29:54,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:29:54,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 224 states [2022-04-05 06:29:54,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:29:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2022-04-05 06:29:54,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8301, Invalid=41651, Unknown=0, NotChecked=0, Total=49952 [2022-04-05 06:29:54,874 INFO L87 Difference]: Start difference. First operand 179 states and 183 transitions. Second operand has 224 states, 224 states have (on average 2.0) internal successors, (448), 223 states have internal predecessors, (448), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:29:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:29:57,920 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2022-04-05 06:29:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-05 06:29:57,920 INFO L78 Accepts]: Start accepts. Automaton has has 224 states, 224 states have (on average 2.0) internal successors, (448), 223 states have internal predecessors, (448), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 167 [2022-04-05 06:29:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:29:57,920 INFO L225 Difference]: With dead ends: 189 [2022-04-05 06:29:57,920 INFO L226 Difference]: Without dead ends: 179 [2022-04-05 06:29:57,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 189 SyntacticMatches, 5 SemanticMatches, 298 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44074 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=14017, Invalid=75683, Unknown=0, NotChecked=0, Total=89700 [2022-04-05 06:29:57,924 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 262 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:29:57,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 105 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1857 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:29:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-04-05 06:29:57,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-04-05 06:29:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 168 states have internal predecessors, (170), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:29:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 181 transitions. [2022-04-05 06:29:57,958 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 181 transitions. Word has length 167 [2022-04-05 06:29:57,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:29:57,958 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 181 transitions. [2022-04-05 06:29:57,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 224 states, 224 states have (on average 2.0) internal successors, (448), 223 states have internal predecessors, (448), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:29:57,958 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 181 transitions. [2022-04-05 06:29:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-04-05 06:29:57,962 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:29:57,962 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:29:57,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-04-05 06:29:58,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-04-05 06:29:58,163 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:29:58,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:29:58,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1628822160, now seen corresponding path program 67 times [2022-04-05 06:29:58,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:29:58,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416500570] [2022-04-05 06:29:58,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:29:58,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:29:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:58,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:29:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:58,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 06:29:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:58,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-05 06:29:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:29:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1225 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:29:59,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:29:59,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416500570] [2022-04-05 06:29:59,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416500570] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:29:59,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966960322] [2022-04-05 06:29:59,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:29:59,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:29:59,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:29:59,508 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:29:59,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-04-05 06:30:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:30:00,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-05 06:30:00,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:30:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1225 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:30:02,441 INFO L328 TraceCheckSpWp]: Computing backward predicates...